* [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support
@ 2025-09-11 13:39 Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 1/8] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch Christian Marangi
` (6 more replies)
0 siblings, 7 replies; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
This series add the initial support for the Airoha AN8855 Switch.
It's a 5 port Gigabit Switch with SGMII/HSGMII upstream port.
This is starting to get in the wild and there are already some router
having this switch chip.
It's conceptually similar to mediatek switch but register and bits
are different. And there is massive list of register for the PCS
configuration.
Saddly for that part we have absolutely NO documentation currently.
There is this special thing where PHY needs to be calibrated with values
from the switch efuse. (the thing have a whole cpu timer and MCU)
Given the double usage of PHY and Switch accessor, a special handling
is used with registering a mdio-regmap bus for each internal PHY.
From v8 Driver is now evaluated with Kernel selftest scripts for DSA:
Additional info about the test bridge_vlan_aware.sh.
It was discovered that the Airoha Switch (and probably the Mediatek one
that produce the same test results) hardcode checking for 802.1ad when
the port is configured in VLAN-Aware mode (aka Security mode).
In such mode, both 802.1q and 802.1ad TPID are checked, hence the
bridge_vlan_aware.sh test fails as packets with 802.1ad TPID are rejected
(in the case where a wrong VLAN ID is forwarded)
This was confirmed by Airoha and multiple try were done to try to
workaround this problem. No solution were found to this as ACL mechanism
can't work on receiving packets and the Switch doesn't support turning off
this.
The current driver is in use from 4 month on OpenWrt with all kind of
scenario confirming working in VLAN bridge. By tweaking the
bridge_vlan_aware.sh test with setting the TPID to 0x9100, the test
correctly pass as packets gets classified as untagged and the default PVID
applied. It's also confirmed that switch correctly parse the 802.1ad tag
and make the packet pass only when allowed by VLAN table rules.
Output local_termination.sh
TEST: lan2: Unicast IPv4 to primary MAC address [ OK ]
TEST: lan2: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: lan2: Unicast IPv4 to unknown MAC address [ OK ]
TEST: lan2: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: lan2: Unicast IPv4 to unknown MAC address, allmulti [ OK ]
TEST: lan2: Multicast IPv4 to joined group [ OK ]
TEST: lan2: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: lan2: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: lan2: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: lan2: Multicast IPv6 to joined group [ OK ]
TEST: lan2: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: lan2: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: lan2: Multicast IPv6 to unknown group, allmulti [ OK ]
TEST: lan2: 1588v2 over L2 transport, Sync [ OK ]
TEST: lan2: 1588v2 over L2 transport, Follow-Up [ OK ]
TEST: lan2: 1588v2 over L2 transport, Peer Delay Request [ OK ]
TEST: lan2: 1588v2 over IPv4, Sync [FAIL]
reception failed
TEST: lan2: 1588v2 over IPv4, Follow-Up [FAIL]
reception failed
TEST: lan2: 1588v2 over IPv4, Peer Delay Request [FAIL]
reception failed
TEST: lan2: 1588v2 over IPv6, Sync [FAIL]
reception failed
TEST: lan2: 1588v2 over IPv6, Follow-Up [FAIL]
reception failed
TEST: lan2: 1588v2 over IPv6, Peer Delay Request [FAIL]
reception failed
TEST: vlan_filtering=0 bridge: Unicast IPv4 to primary MAC address [ OK ]
TEST: vlan_filtering=0 bridge: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: vlan_filtering=0 bridge: Unicast IPv4 to unknown MAC address [ OK ]
TEST: vlan_filtering=0 bridge: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: vlan_filtering=0 bridge: Unicast IPv4 to unknown MAC address, allmulti [ OK ]
TEST: vlan_filtering=0 bridge: Multicast IPv4 to joined group [ OK ]
TEST: vlan_filtering=0 bridge: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: vlan_filtering=0 bridge: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: vlan_filtering=0 bridge: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: vlan_filtering=0 bridge: Multicast IPv6 to joined group [ OK ]
TEST: vlan_filtering=0 bridge: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: vlan_filtering=0 bridge: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: vlan_filtering=0 bridge: Multicast IPv6 to unknown group, allmulti [ OK ]
TEST: vlan_filtering=1 bridge: Unicast IPv4 to primary MAC address [ OK ]
TEST: vlan_filtering=1 bridge: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: vlan_filtering=1 bridge: Unicast IPv4 to unknown MAC address [ OK ]
TEST: vlan_filtering=1 bridge: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: vlan_filtering=1 bridge: Unicast IPv4 to unknown MAC address, allmulti [ OK ]
TEST: vlan_filtering=1 bridge: Multicast IPv4 to joined group [ OK ]
TEST: vlan_filtering=1 bridge: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: vlan_filtering=1 bridge: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: vlan_filtering=1 bridge: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: vlan_filtering=1 bridge: Multicast IPv6 to joined group [ OK ]
TEST: vlan_filtering=1 bridge: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: vlan_filtering=1 bridge: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: vlan_filtering=1 bridge: Multicast IPv6 to unknown group, allmulti [ OK ]
TEST: VLAN upper: Unicast IPv4 to primary MAC address [ OK ]
TEST: VLAN upper: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: VLAN upper: Unicast IPv4 to unknown MAC address [ OK ]
TEST: VLAN upper: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: VLAN upper: Unicast IPv4 to unknown MAC address, allmulti [ OK ]
TEST: VLAN upper: Multicast IPv4 to joined group [ OK ]
TEST: VLAN upper: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN upper: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: VLAN upper: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: VLAN upper: Multicast IPv6 to joined group [ OK ]
TEST: VLAN upper: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN upper: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: VLAN upper: Multicast IPv6 to unknown group, allmulti [ OK ]
TEST: VLAN upper: 1588v2 over L2 transport, Sync [ OK ]
TEST: VLAN upper: 1588v2 over L2 transport, Follow-Up [FAIL]
reception failed
TEST: VLAN upper: 1588v2 over L2 transport, Peer Delay Request [ OK ]
TEST: VLAN upper: 1588v2 over IPv4, Sync [FAIL]
reception failed
;TEST: VLAN upper: 1588v2 over IPv4, Follow-Up [FAIL]
reception failed
TEST: VLAN upper: 1588v2 over IPv4, Peer Delay Request [FAIL]
reception failed
TEST: VLAN upper: 1588v2 over IPv6, Sync [FAIL]
reception failed
TEST: VLAN upper: 1588v2 over IPv6, Follow-Up [FAIL]
reception failed
TEST: VLAN upper: 1588v2 over IPv6, Peer Delay Request [FAIL]
reception failed
TEST: VLAN over vlan_filtering=0 bridged port: Unicast IPv4 to primary MAC address [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Unicast IPv4 to unknown MAC address [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Unicast IPv4 to unknown MAC address, allmulti [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv4 to joined group [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv6 to joined group [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: Multicast IPv6 to unknown group, allmulti [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over L2 transport, Sync [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over L2 transport, Follow-Up [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over L2 transport, Peer Delay Request [ OK ]
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over IPv4, Sync [FAIL]
reception failed
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over IPv4, Follow-Up [FAIL]
reception failed
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over IPv4, Peer Delay Request [FAIL]
reception failed
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over IPv6, Sync [FAIL]
reception failed
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over IPv6, Follow-Up [FAIL]
reception failed
TEST: VLAN over vlan_filtering=0 bridged port: 1588v2 over IPv6, Peer Delay Request [FAIL]
reception failed
TEST: VLAN over vlan_filtering=1 bridged port: Unicast IPv4 to primary MAC address [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Unicast IPv4 to unknown MAC address [FAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=1 bridged port: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Unicast IPv4 to unknown MAC address, allmulti [FAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv4 to joined group [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv6 to joined group [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: Multicast IPv6 to unknown group, allmulti [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over L2 transport, Sync [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over L2 transport, Follow-Up [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over L2 transport, Peer Delay Request [ OK ]
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over IPv4, Sync [FAIL]
reception failed
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over IPv4, Follow-Up [FAIL]
reception failed
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over IPv4, Peer Delay Request [FAIL]
reception failed
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over IPv6, Sync [FAIL]
reception failed
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over IPv6, Follow-Up [FAIL]
reception failed
TEST: VLAN over vlan_filtering=1 bridged port: 1588v2 over IPv6, Peer Delay Request [FAIL]
reception failed
TEST: VLAN over vlan_filtering=0 bridge: Unicast IPv4 to primary MAC address [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Unicast IPv4 to unknown MAC address [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Unicast IPv4 to unknown MAC address, allmulti [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv4 to joined group [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv6 to joined group [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=0 bridge: Multicast IPv6 to unknown group, allmulti [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Unicast IPv4 to primary MAC address [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Unicast IPv4 to macvlan MAC address [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Unicast IPv4 to unknown MAC address [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Unicast IPv4 to unknown MAC address, promisc [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Unicast IPv4 to unknown MAC address, allmulti [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv4 to joined group [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv4 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv4 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv4 to unknown group, allmulti [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv6 to joined group [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv6 to unknown group [XFAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv6 to unknown group, promisc [ OK ]
TEST: VLAN over vlan_filtering=1 bridge: Multicast IPv6 to unknown group, allmulti [ OK ]
Output bridge_vlan_unaware.sh
TEST: ping [ OK ]
TEST: ping6 [ OK ]
TEST: FDB learning [ OK ]
TEST: Unknown unicast flood [ OK ]
TEST: Unregistered multicast flood [ OK ]
Output bridge_vlan_aware.sh
TEST: ping [ OK ]
TEST: ping6 [ OK ]
TEST: FDB learning [ OK ]
TEST: Unknown unicast flood [ OK ]
TEST: Unregistered multicast flood [ OK ]
INFO: Add and delete a VLAN on bridge port lan2
TEST: ping [ OK ]
TEST: ping6 [ OK ]
TEST: Externally learned FDB entry - ageing & roaming [ OK ]
TEST: FDB entry in PVID for VLAN-tagged with other TPID [FAIL]
FDB entry was not learned when it should
TEST: Reception of VLAN with other TPID as untagged [FAIL]
Packet was not forwarded when it should
TEST: Reception of VLAN with other TPID as untagged (no PVID) [FAIL]
Packet was forwarded when should not
Changes v17:
- Drop nvmem patch (subset merged and present in linux-next)
- Fix wrong Documentation patch for MFD
- Address reviews for MFD driver
- Rework MTK tag to slipt for Airoha name
Changes v16:
- Rebase on top of net-next
- Drop PBUS implementation (Airoha said that it's not OK to use it)
- Convert to simple mdio-regmap and split regmap
- Fix typo for some define (AND8855 -> AN8855)
Changes v15:
- Rebase on top of net-next
- Drop regmap MDIO patch (in favor of PBUS)
- Implement MDIO PBUS and rework MDIO driver/MFD
- Reimplement EEE support
- Add some check for regmap from MFD
- Move to single regmap and add comments with all findings
Changes v14:
- Move MAITAINERS entry to dedicated commit (make it easier for cross
subsystem merge)
- Pack variables in trap function
- Add additional patch for reported difference from MTK tag
Changes v13:
- Reimplement tx_lpi OPs
- Rework mdio-regmap to internally encode/decode address
- Fix error in Documentation
- Drop ext-surge property (assume calibration with declared nvmem cell)
- Fix comments from Lee on MFD driver
- Improve print error and drop extra space in DSA driver
Changes v12:
- Update on top of net-next
- Add additional info on conver-letter about slefttests and HW limitation
- Introduce mdio-regmap generalization for multiple address
- Drop dev flags and define PHY calibration in PHY node directly
Changes v11:
- Address reviews from Christophe (spell mistake + dev_err_probe)
- Fix kconfig dependency for MFD driver (depends on MDIO_DEVICE instead of MDIO)
(indirectly fix link error for mdio APIs)
- Fix copy-paste error for MFD driver of_table
- Fix compilation error for PHY (move NVMEM to .config)
- Drop unneeded NVMEM node from MDIO example schema (from Andrew)
- Adapt MFD example schema to MDIO reg property restrictions
Changes v10:
- Entire rework to MFD + split to MDIO, EFUSE, SWITCH separate drivers
- Drop EEE OPs (while Russell finish RFC for EEE changes)
- Use new pcs_inpand OPs
- Drop AN restart function and move to pcs_config
- Enable assisted_learning and disable CPU learn (preparation for fdb_isolation)
- Move EFUSE read in Internal PHY driver to .config to handle EPROBE_DEFER
(needed now that NVMEM driver is register externally instead of internally to switch
node)
Changes v9:
- Error out on using 5G speed as currently not supported
- Add missing MAC_2500FD in phylink mac_capabilities
- Add comment and improve if condition for an8855_phylink_mac_config
Changes v8:
- Add port Fast Age support
- Add support for Port Isolation
- Use correct register for Learning Disable
- Add support for Ageing Time OP
- Set default PVID to 0 by default
- Add mdb OPs
- Add port change MTU
- Fix support for Upper VLAN
Changes v7:
- Fix devm_dsa_register_switch wrong export symbol
Changes v6:
- Drop standard MIB and handle with ethtool OPs (as requested by Jakub)
- Cosmetic: use bool instead of 0 or 1
Changes v5:
- Add devm_dsa_register_switch() patch
- Add Reviewed-by tag for DT patch
Changes v4:
- Set regmap readable_table static (mute compilation warning)
- Add support for port_bridge flags (LEARNING, FLOOD)
- Reset fdb struct in fdb_dump
- Drop support_asym_pause in port_enable
- Add define for get_phy_flags
- Fix bug for port not inititially part of a bridge
(in an8855_setup the port matrix was always cleared but
the CPU port was never initially added)
- Disable learning and flood for user port by default
- Set CPU port to flood and learning by default
- Correctly AND force duplex and flow control in an8855_phylink_mac_link_up
- Drop RGMII from pcs_config
- Check ret in "Disable AN if not in autoneg"
- Use devm_mutex_init
- Fix typo for AN8855_PORT_CHECK_MODE
- Better define AN8855_STP_LISTENING = AN8855_STP_BLOCKING
- Fix typo in AN8855_PHY_EN_DOWN_SHIFT
- Use paged helper for PHY
- Skip calibration in config_init if priv not defined
Changes v3:
- Out of RFC
- Switch PHY code to select_page API
- Better describe masks and bits in PHY driver for ADC register
- Drop raw values and use define for mii read/write
- Switch to absolute PHY address
- Replace raw values with mask and bits for pcs_config
- Fix typo for ext-surge property name
- Drop support for relocating Switch base PHY address on the bus
Changes v2:
- Drop mutex guard patch
- Drop guard usage in DSA driver
- Use __mdiobus_write/read
- Check return condition and return errors for mii read/write
- Fix wrong logic for EEE
- Fix link_down (don't force link down with autoneg)
- Fix forcing speed on sgmii autoneg
- Better document link speed for sgmii reg
- Use standard define for sgmii reg
- Imlement nvmem support to expose switch EFUSE
- Rework PHY calibration with the use of NVMEM producer/consumer
- Update DT with new NVMEM property
- Move aneg validation for 2500-basex in pcs_config
- Move r50Ohm table and function to PHY driver
Christian Marangi (8):
dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch
dt-bindings: net: Document support for AN8855 Switch Internal PHY
dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC
net: dsa: tag_mtk: add Airoha variant usage of this TAG
net: dsa: Add Airoha AN8855 5-Port Gigabit DSA Switch driver
mfd: an8855: Add support for Airoha AN8855 Switch MFD
net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY
MAINTAINERS: add myself as maintainer for AN8855
.../bindings/mfd/airoha,an8855.yaml | 173 ++
.../bindings/net/airoha,an8855-phy.yaml | 83 +
.../net/dsa/airoha,an8855-switch.yaml | 86 +
MAINTAINERS | 16 +
drivers/mfd/Kconfig | 13 +
drivers/mfd/Makefile | 1 +
drivers/mfd/airoha-an8855.c | 517 ++++
drivers/net/dsa/Kconfig | 9 +
drivers/net/dsa/Makefile | 1 +
drivers/net/dsa/an8855.c | 2393 +++++++++++++++++
drivers/net/dsa/an8855.h | 773 ++++++
drivers/net/phy/Kconfig | 5 +
drivers/net/phy/Makefile | 1 +
drivers/net/phy/air_an8855.c | 261 ++
include/net/dsa.h | 2 +
net/dsa/Kconfig | 11 +
net/dsa/Makefile | 2 +-
net/dsa/tag_mtk.c | 36 +-
18 files changed, 4379 insertions(+), 4 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mfd/airoha,an8855.yaml
create mode 100644 Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
create mode 100644 Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
create mode 100644 drivers/mfd/airoha-an8855.c
create mode 100644 drivers/net/dsa/an8855.c
create mode 100644 drivers/net/dsa/an8855.h
create mode 100644 drivers/net/phy/air_an8855.c
--
2.51.0
^ permalink raw reply [flat|nested] 13+ messages in thread
* [net-next PATCH v17 1/8] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
@ 2025-09-11 13:39 ` Christian Marangi
2025-09-13 13:02 ` Simon Horman
2025-09-11 13:39 ` [net-next PATCH v17 2/8] dt-bindings: net: Document support for AN8855 Switch Internal PHY Christian Marangi
` (5 subsequent siblings)
6 siblings, 1 reply; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
Document support for Airoha AN8855 5-port Gigabit Switch.
It does expose the 5 Internal PHYs on the MDIO bus and each port
can access the Switch register space by configurting the PHY page.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
.../net/dsa/airoha,an8855-switch.yaml | 86 +++++++++++++++++++
1 file changed, 86 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
diff --git a/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml b/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
new file mode 100644
index 000000000000..fbb9219fadae
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/dsa/airoha,an8855-switch.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN8855 Gigabit Switch
+
+maintainers:
+ - Christian Marangi <ansuelsmth@gmail.com>
+
+description: >
+ Airoha AN8855 is a 5-port Gigabit Switch.
+
+ It does expose the 5 Internal PHYs on the MDIO bus and each port
+ can access the Switch register space by configurting the PHY page.
+
+$ref: dsa.yaml#/$defs/ethernet-ports
+
+properties:
+ compatible:
+ const: airoha,an8855-switch
+
+required:
+ - compatible
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ ethernet-switch {
+ compatible = "airoha,an8855-switch";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ label = "lan1";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy1>;
+ };
+
+ port@1 {
+ reg = <1>;
+ label = "lan2";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy2>;
+ };
+
+ port@2 {
+ reg = <2>;
+ label = "lan3";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy3>;
+ };
+
+ port@3 {
+ reg = <3>;
+ label = "lan4";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy4>;
+ };
+
+ port@4 {
+ reg = <4>;
+ label = "wan";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy5>;
+ };
+
+ port@5 {
+ reg = <5>;
+ label = "cpu";
+ ethernet = <&gmac0>;
+ phy-mode = "2500base-x";
+
+ fixed-link {
+ speed = <2500>;
+ full-duplex;
+ pause;
+ };
+ };
+ };
+ };
--
2.51.0
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [net-next PATCH v17 2/8] dt-bindings: net: Document support for AN8855 Switch Internal PHY
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 1/8] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch Christian Marangi
@ 2025-09-11 13:39 ` Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 3/8] dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC Christian Marangi
` (4 subsequent siblings)
6 siblings, 0 replies; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
Document support for AN8855 Switch Internal PHY.
Airoha AN8855 is a 5-port Gigabit Switch that expose the Internal
PHYs on the MDIO bus.
Each PHY might need to be calibrated to correctly work with the
use of the eFUSE provided by the Switch SoC. This can be enabled by
defining in the PHY node the NVMEM cell properties.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
.../bindings/net/airoha,an8855-phy.yaml | 83 +++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
diff --git a/Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml b/Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
new file mode 100644
index 000000000000..d2f86116badf
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/airoha,an8855-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN8855 Switch Internal PHY
+
+maintainers:
+ - Christian Marangi <ansuelsmth@gmail.com>
+
+description: >
+ Airoha AN8855 is a 5-port Gigabit Switch that expose the Internal
+ PHYs on the MDIO bus.
+
+ Each PHY might need to be calibrated to correctly work with the
+ use of the eFUSE provided by the Switch SoC.
+
+allOf:
+ - $ref: ethernet-phy.yaml#
+
+select:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - ethernet-phy-idc0ff.0410
+ required:
+ - compatible
+
+properties:
+ reg:
+ maxItems: 1
+
+ nvmem-cells:
+ items:
+ - description: phandle to SoC eFUSE tx_a
+ - description: phandle to SoC eFUSE tx_b
+ - description: phandle to SoC eFUSE tx_c
+ - description: phandle to SoC eFUSE tx_d
+
+ nvmem-cell-names:
+ items:
+ - const: tx_a
+ - const: tx_b
+ - const: tx_c
+ - const: tx_d
+
+required:
+ - compatible
+ - reg
+
+dependentRequired:
+ nvmem-cells: [ nvmem-cell-names ]
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ethernet-phy@1 {
+ compatible = "ethernet-phy-idc0ff.0410",
+ "ethernet-phy-ieee802.3-c45";
+
+ reg = <1>;
+ };
+
+ ethernet-phy@2 {
+ compatible = "ethernet-phy-idc0ff.0410",
+ "ethernet-phy-ieee802.3-c45";
+
+ reg = <2>;
+
+ nvmem-cells = <&shift_sel_port0_tx_a>,
+ <&shift_sel_port0_tx_b>,
+ <&shift_sel_port0_tx_c>,
+ <&shift_sel_port0_tx_d>;
+ nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+ };
+ };
--
2.51.0
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [net-next PATCH v17 3/8] dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 1/8] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 2/8] dt-bindings: net: Document support for AN8855 Switch Internal PHY Christian Marangi
@ 2025-09-11 13:39 ` Christian Marangi
2025-09-12 14:23 ` Rob Herring (Arm)
2025-09-11 13:39 ` [net-next PATCH v17 4/8] net: dsa: tag_mtk: add Airoha variant usage of this TAG Christian Marangi
` (3 subsequent siblings)
6 siblings, 1 reply; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
Document support for Airoha AN8855 Switch SoC. This SoC expose various
peripherals like an Ethernet Switch, a NVMEM provider and Ethernet PHYs.
It does also support i2c and timers but those are not currently
supported/used.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
.../bindings/mfd/airoha,an8855.yaml | 173 ++++++++++++++++++
1 file changed, 173 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/airoha,an8855.yaml
diff --git a/Documentation/devicetree/bindings/mfd/airoha,an8855.yaml b/Documentation/devicetree/bindings/mfd/airoha,an8855.yaml
new file mode 100644
index 000000000000..647d6d4c4c6f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/airoha,an8855.yaml
@@ -0,0 +1,173 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/airoha,an8855.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN8855 Switch SoC
+
+maintainers:
+ - Christian Marangi <ansuelsmth@gmail.com>
+
+description: >
+ Airoha AN8855 Switch is a SoC that expose various peripherals like an
+ Ethernet Switch, a NVMEM provider and Ethernet PHYs.
+
+ It does also support i2c and timers but those are not currently
+ supported/used.
+
+properties:
+ compatible:
+ const: airoha,an8855
+
+ reg:
+ maxItems: 1
+
+ reset-gpios: true
+
+ efuse:
+ type: object
+ $ref: /schemas/nvmem/airoha,an8855-efuse.yaml
+ description: EFUSE exposed by the Airoha AN8855 SoC
+
+ ethernet-switch:
+ type: object
+ $ref: /schemas/net/dsa/airoha,an8855-switch.yaml
+ description: Switch exposed by the Airoha AN8855 SoC
+
+ mdio:
+ $ref: /schemas/net/mdio.yaml#
+ description: MDIO exposed by the Airoha AN8855 SoC
+
+required:
+ - compatible
+ - reg
+ - mdio
+ - ethernet-switch
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ soc@1 {
+ compatible = "airoha,an8855";
+ reg = <1>;
+
+ reset-gpios = <&pio 39 0>;
+
+ efuse {
+ compatible = "airoha,an8855-efuse";
+
+ #nvmem-cell-cells = <0>;
+
+ nvmem-layout {
+ compatible = "fixed-layout";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ shift_sel_port0_tx_a: shift-sel-port0-tx-a@c {
+ reg = <0xc 0x4>;
+ };
+
+ shift_sel_port0_tx_b: shift-sel-port0-tx-b@10 {
+ reg = <0x10 0x4>;
+ };
+
+ shift_sel_port0_tx_c: shift-sel-port0-tx-c@14 {
+ reg = <0x14 0x4>;
+ };
+
+ shift_sel_port0_tx_d: shift-sel-port0-tx-d@18 {
+ reg = <0x18 0x4>;
+ };
+
+ shift_sel_port1_tx_a: shift-sel-port1-tx-a@1c {
+ reg = <0x1c 0x4>;
+ };
+
+ shift_sel_port1_tx_b: shift-sel-port1-tx-b@20 {
+ reg = <0x20 0x4>;
+ };
+
+ shift_sel_port1_tx_c: shift-sel-port1-tx-c@24 {
+ reg = <0x24 0x4>;
+ };
+
+ shift_sel_port1_tx_d: shift-sel-port1-tx-d@28 {
+ reg = <0x28 0x4>;
+ };
+ };
+ };
+
+ ethernet-switch {
+ compatible = "airoha,an8855-switch";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ label = "lan1";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy1>;
+ };
+
+ port@1 {
+ reg = <1>;
+ label = "lan2";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy2>;
+ };
+
+ port@5 {
+ reg = <5>;
+ label = "cpu";
+ ethernet = <&gmac0>;
+ phy-mode = "2500base-x";
+
+ fixed-link {
+ speed = <2500>;
+ full-duplex;
+ pause;
+ };
+ };
+ };
+ };
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ internal_phy1: ethernet-phy@1 {
+ compatible = "ethernet-phy-idc0ff.0410",
+ "ethernet-phy-ieee802.3-c22";
+ reg = <1>;
+
+ nvmem-cells = <&shift_sel_port0_tx_a>,
+ <&shift_sel_port0_tx_b>,
+ <&shift_sel_port0_tx_c>,
+ <&shift_sel_port0_tx_d>;
+ nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+ };
+
+ internal_phy2: ethernet-phy@2 {
+ compatible = "ethernet-phy-idc0ff.0410",
+ "ethernet-phy-ieee802.3-c22";
+ reg = <2>;
+
+ nvmem-cells = <&shift_sel_port1_tx_a>,
+ <&shift_sel_port1_tx_b>,
+ <&shift_sel_port1_tx_c>,
+ <&shift_sel_port1_tx_d>;
+ nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+ };
+ };
+ };
+ };
--
2.51.0
base-commit: 04b74f665961599e807b24af28099a29d691b18c
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [net-next PATCH v17 4/8] net: dsa: tag_mtk: add Airoha variant usage of this TAG
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
` (2 preceding siblings ...)
2025-09-11 13:39 ` [net-next PATCH v17 3/8] dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC Christian Marangi
@ 2025-09-11 13:39 ` Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD Christian Marangi
` (2 subsequent siblings)
6 siblings, 0 replies; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
Add variant of the MTK TAG for Airoha Switch and comments about difference
between Airoha AN8855 and Mediatek tag bitmap.
Airoha AN8855 doesn't support controlling SA learning and Leaky VLAN
from tag. Although these bits are not used (and even not defined for
Leaky VLAN), it's worth to add comments for these difference to prevent
any kind of regression in the future if ever these bits will be used.
Rework the makefile, config and tag driver to better report to
external tool (like libpcap) the usage of this variant with a dedicated
"Airoha" name.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
include/net/dsa.h | 2 ++
net/dsa/Kconfig | 11 +++++++++++
net/dsa/Makefile | 2 +-
net/dsa/tag_mtk.c | 36 +++++++++++++++++++++++++++++++++---
4 files changed, 47 insertions(+), 4 deletions(-)
diff --git a/include/net/dsa.h b/include/net/dsa.h
index d73ea0880066..bf03493e64ab 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -55,6 +55,7 @@ struct tc_action;
#define DSA_TAG_PROTO_LAN937X_VALUE 27
#define DSA_TAG_PROTO_VSC73XX_8021Q_VALUE 28
#define DSA_TAG_PROTO_BRCM_LEGACY_FCS_VALUE 29
+#define DSA_TAG_PROTO_AIROHA_VALUE 30
enum dsa_tag_protocol {
DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
@@ -69,6 +70,7 @@ enum dsa_tag_protocol {
DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
+ DSA_TAG_PROTO_AIROHA = DSA_TAG_PROTO_AIROHA_VALUE,
DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 869cbe57162f..7d63ecda25c8 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -98,12 +98,23 @@ config NET_DSA_TAG_EDSA
Say Y or M if you want to enable support for tagging frames for the
Marvell switches which use EtherType DSA headers.
+config NET_DSA_TAG_MTK_COMMON
+ tristate
+
config NET_DSA_TAG_MTK
tristate "Tag driver for Mediatek switches"
+ select NET_DSA_TAG_MTK_COMMON
help
Say Y or M if you want to enable support for tagging frames for
Mediatek switches.
+config NET_DSA_TAG_AIROHA
+ tristate "Tag driver for Airoha switches"
+ select NET_DSA_TAG_MTK_COMMON
+ help
+ Say Y or M if you want to enable support for tagging frames for
+ Airoha switches.
+
config NET_DSA_TAG_KSZ
tristate "Tag driver for Microchip 8795/937x/9477/9893 families of switches"
help
diff --git a/net/dsa/Makefile b/net/dsa/Makefile
index 555c07cfeb71..7aba189a715c 100644
--- a/net/dsa/Makefile
+++ b/net/dsa/Makefile
@@ -27,7 +27,7 @@ obj-$(CONFIG_NET_DSA_TAG_GSWIP) += tag_gswip.o
obj-$(CONFIG_NET_DSA_TAG_HELLCREEK) += tag_hellcreek.o
obj-$(CONFIG_NET_DSA_TAG_KSZ) += tag_ksz.o
obj-$(CONFIG_NET_DSA_TAG_LAN9303) += tag_lan9303.o
-obj-$(CONFIG_NET_DSA_TAG_MTK) += tag_mtk.o
+obj-$(CONFIG_NET_DSA_TAG_MTK_COMMON) += tag_mtk.o
obj-$(CONFIG_NET_DSA_TAG_NONE) += tag_none.o
obj-$(CONFIG_NET_DSA_TAG_OCELOT) += tag_ocelot.o
obj-$(CONFIG_NET_DSA_TAG_OCELOT_8021Q) += tag_ocelot_8021q.o
diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c
index b670e3c53e91..32befcbdf4be 100644
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -11,6 +11,7 @@
#include "tag.h"
#define MTK_NAME "mtk"
+#define AIROHA_NAME "airoha"
#define MTK_HDR_LEN 4
#define MTK_HDR_XMIT_UNTAGGED 0
@@ -18,6 +19,9 @@
#define MTK_HDR_XMIT_TAGGED_TPID_88A8 2
#define MTK_HDR_RECV_SOURCE_PORT_MASK GENMASK(2, 0)
#define MTK_HDR_XMIT_DP_BIT_MASK GENMASK(5, 0)
+/* AN8855 doesn't support SA_DIS and Leaky VLAN
+ * control in tag as these bits doesn't exist.
+ */
#define MTK_HDR_XMIT_SA_DIS BIT(6)
static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
@@ -94,6 +98,7 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev)
return skb;
}
+#if IS_ENABLED(CONFIG_NET_DSA_TAG_MTK)
static const struct dsa_device_ops mtk_netdev_ops = {
.name = MTK_NAME,
.proto = DSA_TAG_PROTO_MTK,
@@ -102,8 +107,33 @@ static const struct dsa_device_ops mtk_netdev_ops = {
.needed_headroom = MTK_HDR_LEN,
};
-MODULE_DESCRIPTION("DSA tag driver for Mediatek switches");
-MODULE_LICENSE("GPL");
+DSA_TAG_DRIVER(mtk_netdev_ops);
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_MTK, MTK_NAME);
+#endif
-module_dsa_tag_driver(mtk_netdev_ops);
+#if IS_ENABLED(CONFIG_NET_DSA_TAG_AIROHA)
+static const struct dsa_device_ops airoha_netdev_ops = {
+ .name = AIROHA_NAME,
+ .proto = DSA_TAG_PROTO_AIROHA,
+ .xmit = mtk_tag_xmit,
+ .rcv = mtk_tag_rcv,
+ .needed_headroom = MTK_HDR_LEN,
+};
+
+DSA_TAG_DRIVER(airoha_netdev_ops);
+MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_AIROHA, AIROHA_NAME);
+#endif
+
+static struct dsa_tag_driver *dsa_tag_driver_array[] = {
+#if IS_ENABLED(CONFIG_NET_DSA_TAG_MTK)
+ &DSA_TAG_DRIVER_NAME(mtk_netdev_ops),
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_TAG_AIROHA)
+ &DSA_TAG_DRIVER_NAME(airoha_netdev_ops),
+#endif
+};
+
+module_dsa_tag_drivers(dsa_tag_driver_array);
+
+MODULE_DESCRIPTION("DSA tag driver for Mediatek switches");
+MODULE_LICENSE("GPL");
--
2.51.0
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
` (3 preceding siblings ...)
2025-09-11 13:39 ` [net-next PATCH v17 4/8] net: dsa: tag_mtk: add Airoha variant usage of this TAG Christian Marangi
@ 2025-09-11 13:39 ` Christian Marangi
2025-09-13 13:01 ` Simon Horman
2025-09-11 13:39 ` [net-next PATCH v17 7/8] net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 8/8] MAINTAINERS: add myself as maintainer for AN8855 Christian Marangi
6 siblings, 1 reply; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
Add support for Airoha AN8855 Switch MFD that provide support for a DSA
switch and a NVMEM provider.
Also make use of the mdio-regmap driver and register a regmap for each
internal PHY of the switch.
This is needed to handle the double usage of the PHYs as both PHY and
Switch accessor.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/mfd/Kconfig | 13 +
drivers/mfd/Makefile | 1 +
drivers/mfd/airoha-an8855.c | 517 ++++++++++++++++++++++++++++++++++++
3 files changed, 531 insertions(+)
create mode 100644 drivers/mfd/airoha-an8855.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 425c5fba6cb1..f93450444887 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -53,6 +53,19 @@ config MFD_ALTERA_SYSMGR
using regmap_mmio accesses for ARM32 parts and SMC calls to
EL3 for ARM64 parts.
+config MFD_AIROHA_AN8855
+ tristate "Airoha AN8855 Switch Core"
+ select MFD_CORE
+ select MDIO_DEVICE
+ select MDIO_REGMAP
+ depends on NETDEVICES && OF
+ help
+ Support for the Airoha AN8855 Switch Core. This is an SoC
+ that provides various peripherals, to count, i2c, an Ethrnet
+ Switch, a CPU timer, GPIO, eFUSE.
+
+ Currently it provides a DSA switch and a NVMEM provider.
+
config MFD_ACT8945A
tristate "Active-semi ACT8945A"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f7bdedd5a66d..30f46c53d6df 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_88PM860X) += 88pm860x.o
obj-$(CONFIG_MFD_88PM800) += 88pm800.o 88pm80x.o
obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o
obj-$(CONFIG_MFD_88PM886_PMIC) += 88pm886.o
+obj-$(CONFIG_MFD_AIROHA_AN8855) += airoha-an8855.o
obj-$(CONFIG_MFD_ACT8945A) += act8945a.o
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_ARCH_BCM2835) += bcm2835-pm.o
diff --git a/drivers/mfd/airoha-an8855.c b/drivers/mfd/airoha-an8855.c
new file mode 100644
index 000000000000..116c74610e98
--- /dev/null
+++ b/drivers/mfd/airoha-an8855.c
@@ -0,0 +1,517 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Core driver for Airoha AN8855 Switch
+ *
+ * Copyright (C) 2024 Christian Marangi <ansuelsmth@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/fwnode_mdio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mfd/core.h>
+#include <linux/mdio.h>
+#include <linux/mdio/mdio-regmap.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/regmap.h>
+
+/* Register for HW trap status */
+#define AN8855_HWTRAP 0x1000009c
+
+/*
+ * Register of the Switch ID
+ * (called Project ID in Documentation)
+ */
+#define AN8855_CREV 0x10005000
+#define AN8855_ID 0x8855 /* Switch ID */
+
+/* Register for GPHY Power Down
+ * Used to Toggle the Gigabit PHY power and enable them.
+ */
+#define AN8855_RG_GPHY_AFE_PWD 0x1028c840
+
+/* MII Registers */
+#define AN8855_PHY_SELECT_PAGE 0x1f
+#define AN8855_PHY_PAGE GENMASK(2, 0)
+#define AN8855_PHY_PAGE_STANDARD FIELD_PREP_CONST(AN8855_PHY_PAGE, 0x0)
+#define AN8855_PHY_PAGE_EXTENDED_1 FIELD_PREP_CONST(AN8855_PHY_PAGE, 0x1)
+#define AN8855_PHY_PAGE_EXTENDED_4 FIELD_PREP_CONST(AN8855_PHY_PAGE, 0x4)
+
+/* MII Registers Page 4 */
+#define AN8855_PBUS_MODE 0x10
+#define AN8855_PBUS_MODE_ADDR_FIXED 0x0
+#define AN8855_PBUS_MODE_ADDR_INCR BIT(15)
+#define AN8855_PBUS_WR_ADDR_HIGH 0x11
+#define AN8855_PBUS_WR_ADDR_LOW 0x12
+#define AN8855_PBUS_WR_DATA_HIGH 0x13
+#define AN8855_PBUS_WR_DATA_LOW 0x14
+#define AN8855_PBUS_RD_ADDR_HIGH 0x15
+#define AN8855_PBUS_RD_ADDR_LOW 0x16
+#define AN8855_PBUS_RD_DATA_HIGH 0x17
+#define AN8855_PBUS_RD_DATA_LOW 0x18
+
+#define AN8855_MAX_PHY_PORT 5
+
+struct an8855_core_priv {
+ struct mii_bus *bus;
+ unsigned int switch_addr;
+ u16 current_page;
+};
+
+struct an8855_phy_priv {
+ u8 addr;
+ struct an8855_core_priv *core;
+};
+
+static const struct mfd_cell an8855_cells[] = {
+ MFD_CELL_OF("an8855-efuse", NULL, NULL, 0, 0,
+ "airoha,an8855-efuse"),
+ MFD_CELL_OF("an8855-switch", NULL, NULL, 0, 0,
+ "airoha,an8855-switch"),
+};
+
+static int an8855_mii_set_page(struct an8855_core_priv *priv, u8 addr,
+ u8 page) __must_hold(&priv->bus->mdio_lock)
+{
+ struct mii_bus *bus = priv->bus;
+ int ret;
+
+ ret = __mdiobus_write(bus, addr, AN8855_PHY_SELECT_PAGE, page);
+ if (ret) {
+ dev_err_ratelimited(&bus->dev, "failed to set mii page\n");
+ return ret;
+ }
+
+ /* Cache current page if next MII read/write is for Switch page */
+ priv->current_page = page;
+ return 0;
+}
+
+static int an8855_mii_read32(struct mii_bus *bus, u8 phy_id, u32 reg,
+ u32 *val) __must_hold(&bus->mdio_lock)
+{
+ int lo, hi, ret;
+
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_MODE,
+ AN8855_PBUS_MODE_ADDR_FIXED);
+ if (ret)
+ goto err;
+
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_RD_ADDR_HIGH,
+ upper_16_bits(reg));
+ if (ret)
+ goto err;
+
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_RD_ADDR_LOW,
+ lower_16_bits(reg));
+ if (ret)
+ goto err;
+
+ hi = __mdiobus_read(bus, phy_id, AN8855_PBUS_RD_DATA_HIGH);
+ if (hi < 0) {
+ ret = hi;
+ goto err;
+ }
+
+ lo = __mdiobus_read(bus, phy_id, AN8855_PBUS_RD_DATA_LOW);
+ if (lo < 0) {
+ ret = lo;
+ goto err;
+ }
+
+ *val = ((u16)hi << 16) | ((u16)lo & 0xffff);
+
+ return 0;
+err:
+ dev_err_ratelimited(&bus->dev, "failed to read register\n");
+ return ret;
+}
+
+static int an8855_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
+{
+ struct an8855_core_priv *priv = ctx;
+ struct mii_bus *bus = priv->bus;
+ u16 addr = priv->switch_addr;
+ int ret;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ ret = an8855_mii_set_page(priv, addr, AN8855_PHY_PAGE_EXTENDED_4);
+ if (ret < 0)
+ goto exit;
+
+ ret = an8855_mii_read32(bus, addr, reg, val);
+
+exit:
+ mutex_unlock(&bus->mdio_lock);
+
+ return ret < 0 ? ret : 0;
+}
+
+static int an8855_mii_write32(struct mii_bus *bus, u8 phy_id, u32 reg,
+ u32 val) __must_hold(&bus->mdio_lock)
+{
+ int ret;
+
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_MODE,
+ AN8855_PBUS_MODE_ADDR_FIXED);
+ if (ret)
+ goto err;
+
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_WR_ADDR_HIGH,
+ upper_16_bits(reg));
+ if (ret)
+ goto err;
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_WR_ADDR_LOW,
+ lower_16_bits(reg));
+ if (ret)
+ goto err;
+
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_WR_DATA_HIGH,
+ upper_16_bits(val));
+ if (ret)
+ goto err;
+
+ ret = __mdiobus_write(bus, phy_id, AN8855_PBUS_WR_DATA_LOW,
+ lower_16_bits(val));
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_err_ratelimited(&bus->dev,
+ "failed to write an8855 register\n");
+ return ret;
+}
+
+static int an8855_regmap_write(void *ctx, uint32_t reg, uint32_t val)
+{
+ struct an8855_core_priv *priv = ctx;
+ struct mii_bus *bus = priv->bus;
+ u16 addr = priv->switch_addr;
+ int ret;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ ret = an8855_mii_set_page(priv, addr, AN8855_PHY_PAGE_EXTENDED_4);
+ if (ret)
+ goto exit;
+
+ ret = an8855_mii_write32(bus, addr, reg, val);
+
+exit:
+ mutex_unlock(&bus->mdio_lock);
+
+ return ret < 0 ? ret : 0;
+}
+
+static int an8855_regmap_update_bits(void *ctx, uint32_t reg, uint32_t mask,
+ uint32_t write_val)
+{
+ struct an8855_core_priv *priv = ctx;
+ struct mii_bus *bus = priv->bus;
+ u16 addr = priv->switch_addr;
+ u32 val;
+ int ret;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ ret = an8855_mii_set_page(priv, addr, AN8855_PHY_PAGE_EXTENDED_4);
+ if (ret)
+ goto exit;
+
+ ret = an8855_mii_read32(bus, addr, reg, &val);
+ if (ret < 0)
+ goto exit;
+
+ val &= ~mask;
+ val |= write_val;
+ ret = an8855_mii_write32(bus, addr, reg, val);
+
+exit:
+ mutex_unlock(&bus->mdio_lock);
+
+ return ret < 0 ? ret : 0;
+}
+
+static const struct regmap_range an8855_readable_ranges[] = {
+ regmap_reg_range(0x10000000, 0x10000fff), /* SCU */
+ regmap_reg_range(0x10001000, 0x10001fff), /* RBUS */
+ regmap_reg_range(0x10002000, 0x10002fff), /* MCU */
+ regmap_reg_range(0x10005000, 0x10005fff), /* SYS SCU */
+ regmap_reg_range(0x10007000, 0x10007fff), /* I2C Slave */
+ regmap_reg_range(0x10008000, 0x10008fff), /* I2C Master */
+ regmap_reg_range(0x10009000, 0x10009fff), /* PDMA */
+ regmap_reg_range(0x1000a100, 0x1000a2ff), /* General Purpose Timer */
+ regmap_reg_range(0x1000a200, 0x1000a2ff), /* GPU timer */
+ regmap_reg_range(0x1000a300, 0x1000a3ff), /* GPIO */
+ regmap_reg_range(0x1000a400, 0x1000a5ff), /* EFUSE */
+ regmap_reg_range(0x1000c000, 0x1000cfff), /* GDMP CSR */
+ regmap_reg_range(0x10010000, 0x1001ffff), /* GDMP SRAM */
+ regmap_reg_range(0x10200000, 0x10203fff), /* Switch - ARL Global */
+ regmap_reg_range(0x10204000, 0x10207fff), /* Switch - BMU */
+ regmap_reg_range(0x10208000, 0x1020bfff), /* Switch - ARL Port */
+ regmap_reg_range(0x1020c000, 0x1020cfff), /* Switch - SCH */
+ regmap_reg_range(0x10210000, 0x10213fff), /* Switch - MAC */
+ regmap_reg_range(0x10214000, 0x10217fff), /* Switch - MIB */
+ regmap_reg_range(0x10218000, 0x1021bfff), /* Switch - Port Control */
+ regmap_reg_range(0x1021c000, 0x1021ffff), /* Switch - TOP */
+ regmap_reg_range(0x10220000, 0x1022ffff), /* SerDes */
+ regmap_reg_range(0x10286000, 0x10286fff), /* RG Batcher */
+ regmap_reg_range(0x1028c000, 0x1028ffff), /* ETHER_SYS */
+ regmap_reg_range(0x30000000, 0x37ffffff), /* I2C EEPROM */
+ regmap_reg_range(0x38000000, 0x3fffffff), /* BOOT_ROM */
+ regmap_reg_range(0xa0000000, 0xbfffffff), /* GPHY */
+};
+
+static const struct regmap_access_table an8855_readable_table = {
+ .yes_ranges = an8855_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(an8855_readable_ranges),
+};
+
+static const struct regmap_config an8855_regmap_config = {
+ .name = "switch",
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = 0xbfffffff,
+ .reg_read = an8855_regmap_read,
+ .reg_write = an8855_regmap_write,
+ .reg_update_bits = an8855_regmap_update_bits,
+ .disable_locking = true,
+ .rd_table = &an8855_readable_table,
+};
+
+static int an855_regmap_phy_reset_page(struct an8855_core_priv *priv,
+ int phy) __must_hold(&priv->bus->mdio_lock)
+{
+ /* Check PHY page only for addr shared with switch */
+ if (phy != priv->switch_addr)
+ return 0;
+
+ /* Don't restore page if it's not set to Switch page */
+ if (priv->current_page != FIELD_GET(AN8855_PHY_PAGE,
+ AN8855_PHY_PAGE_EXTENDED_4))
+ return 0;
+
+ /*
+ * Restore page to 0, PHY might change page right after but that
+ * will be ignored as it won't be a switch page.
+ */
+ return an8855_mii_set_page(priv, phy, AN8855_PHY_PAGE_STANDARD);
+}
+
+static int an8855_regmap_phy_read(void *ctx, uint32_t reg, uint32_t *val)
+{
+ struct an8855_phy_priv *priv = ctx;
+ struct an8855_core_priv *core_priv;
+ u32 addr = priv->addr;
+ struct mii_bus *bus;
+ int ret;
+
+ core_priv = priv->core;
+ bus = core_priv->bus;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ ret = an855_regmap_phy_reset_page(core_priv, addr);
+ if (ret)
+ goto exit;
+
+ ret = __mdiobus_read(bus, addr, reg);
+ if (ret >= 0)
+ *val = ret;
+
+exit:
+ mutex_unlock(&bus->mdio_lock);
+
+ return ret < 0 ? ret : 0;
+}
+
+static int an8855_regmap_phy_write(void *ctx, uint32_t reg, uint32_t val)
+{
+ struct an8855_phy_priv *priv = ctx;
+ struct an8855_core_priv *core_priv;
+ u32 addr = priv->addr;
+ struct mii_bus *bus;
+ int ret;
+
+ core_priv = priv->core;
+ bus = core_priv->bus;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ ret = an855_regmap_phy_reset_page(core_priv, addr);
+ if (ret)
+ goto exit;
+
+ ret = __mdiobus_write(bus, addr, reg, val);
+
+exit:
+ mutex_unlock(&bus->mdio_lock);
+
+ return ret;
+}
+
+static const struct regmap_config an8855_phy_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 16,
+ .reg_read = an8855_regmap_phy_read,
+ .reg_write = an8855_regmap_phy_write,
+ .disable_locking = true,
+ .max_register = 0x1f,
+};
+
+static int an8855_read_switch_id(struct device *dev, struct regmap *regmap)
+{
+ u32 id;
+ int ret;
+
+ ret = regmap_read(regmap, AN8855_CREV, &id);
+ if (ret)
+ return ret;
+
+ if (id != AN8855_ID) {
+ dev_err(dev, "Detected Switch ID %x but %x was expected\n",
+ id, AN8855_ID);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int an8855_phy_register(struct device *dev, struct an8855_core_priv *priv,
+ struct device_node *phy_np)
+{
+ struct mdio_regmap_config mrc = { };
+ struct an8855_phy_priv *phy_priv;
+ struct regmap *regmap;
+ struct mii_bus *bus;
+ u8 phy_offset;
+ u32 addr;
+ int ret;
+
+ ret = of_property_read_u32(phy_np, "reg", &addr);
+ if (ret)
+ return ret;
+
+ phy_offset = addr - priv->switch_addr;
+ if (phy_offset >= AN8855_MAX_PHY_PORT)
+ return -EINVAL;
+
+ phy_priv = devm_kzalloc(dev, sizeof(*phy_priv), GFP_KERNEL);
+ if (!phy_priv)
+ return -ENOMEM;
+
+ phy_priv->addr = addr;
+ phy_priv->core = priv;
+
+ regmap = devm_regmap_init(dev, NULL, phy_priv, &an8855_phy_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap),
+ "phy%d regmap initialization failed\n",
+ addr);
+
+ mrc.regmap = regmap;
+ mrc.parent = dev;
+ mrc.valid_addr = addr;
+ snprintf(mrc.name, MII_BUS_ID_SIZE, "an8855-phy%d-mii", addr);
+
+ bus = devm_mdio_regmap_register(dev, &mrc);
+ if (IS_ERR(bus))
+ return PTR_ERR(bus);
+
+ return fwnode_mdiobus_register_phy(bus, of_fwnode_handle(phy_np), addr);
+}
+
+static int an855_mdio_register(struct device *dev, struct an8855_core_priv *priv)
+{
+ struct device_node *mdio_np;
+ int ret;
+
+ mdio_np = of_get_child_by_name(dev->of_node, "mdio");
+ if (!mdio_np)
+ return -ENODEV;
+
+ for_each_available_child_of_node_scoped(mdio_np, phy_np) {
+ ret = an8855_phy_register(dev, priv, phy_np);
+ if (ret)
+ break;
+ }
+
+ of_node_put(mdio_np);
+ return ret;
+}
+
+static int an8855_core_probe(struct mdio_device *mdiodev)
+{
+ struct device *dev = &mdiodev->dev;
+ struct an8855_core_priv *priv;
+ struct gpio_desc *reset_gpio;
+ struct regmap *regmap;
+ u32 val;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->bus = mdiodev->bus;
+ priv->switch_addr = mdiodev->addr;
+ /* No DMA for mdiobus, mute warning for DMA mask not set */
+ dev->dma_mask = &dev->coherent_dma_mask;
+
+ regmap = devm_regmap_init(dev, NULL, priv, &an8855_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap),
+ "regmap initialization failed\n");
+
+ ret = an855_mdio_register(dev, priv);
+ if (ret)
+ return ret;
+
+ reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(reset_gpio))
+ return PTR_ERR(reset_gpio);
+
+ if (reset_gpio) {
+ usleep_range(100000, 150000);
+ gpiod_set_value_cansleep(reset_gpio, 0);
+ usleep_range(100000, 150000);
+ gpiod_set_value_cansleep(reset_gpio, 1);
+
+ /* Poll HWTRAP reg to wait for Switch to fully Init */
+ ret = regmap_read_poll_timeout(regmap, AN8855_HWTRAP, val,
+ val, 20, 200000);
+ if (ret)
+ return ret;
+ }
+
+ ret = an8855_read_switch_id(dev, regmap);
+ if (ret)
+ return ret;
+
+ /* Release global PHY power down */
+ ret = regmap_write(regmap, AN8855_RG_GPHY_AFE_PWD, 0x0);
+ if (ret)
+ return ret;
+
+ return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, an8855_cells,
+ ARRAY_SIZE(an8855_cells), NULL, 0,
+ NULL);
+}
+
+static const struct of_device_id an8855_core_of_match[] = {
+ { .compatible = "airoha,an8855" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, an8855_core_of_match);
+
+static struct mdio_driver an8855_core_driver = {
+ .probe = an8855_core_probe,
+ .mdiodrv.driver = {
+ .name = "an8855",
+ .of_match_table = an8855_core_of_match,
+ },
+};
+mdio_module_driver(an8855_core_driver);
+
+MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>");
+MODULE_DESCRIPTION("Driver for Airoha AN8855");
+MODULE_LICENSE("GPL");
--
2.51.0
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [net-next PATCH v17 7/8] net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
` (4 preceding siblings ...)
2025-09-11 13:39 ` [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD Christian Marangi
@ 2025-09-11 13:39 ` Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 8/8] MAINTAINERS: add myself as maintainer for AN8855 Christian Marangi
6 siblings, 0 replies; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
Add support for Airoha AN8855 Internal Switch Gigabit PHY.
This is a simple PHY driver to configure and calibrate the PHY for the
AN8855 Switch with the use of NVMEM cells.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/net/phy/Kconfig | 5 +
drivers/net/phy/Makefile | 1 +
drivers/net/phy/air_an8855.c | 261 +++++++++++++++++++++++++++++++++++
3 files changed, 267 insertions(+)
create mode 100644 drivers/net/phy/air_an8855.c
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index a7fb1d7cae94..c01ca9117fbb 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -91,6 +91,11 @@ config AS21XXX_PHY
AS21210PB1 that all register with the PHY ID 0x7500 0x7500
before the firmware is loaded.
+config AIR_AN8855_PHY
+ tristate "Airoha AN8855 Internal Gigabit PHY"
+ help
+ Currently supports the internal Airoha AN8855 Switch PHY.
+
config AIR_EN8811H_PHY
tristate "Airoha EN8811H 2.5 Gigabit PHY"
help
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 402a33d559de..be18963f93dc 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -29,6 +29,7 @@ obj-y += $(sfp-obj-y) $(sfp-obj-m)
obj-$(CONFIG_ADIN_PHY) += adin.o
obj-$(CONFIG_ADIN1100_PHY) += adin1100.o
+obj-$(CONFIG_AIR_AN8855_PHY) += air_an8855.o
obj-$(CONFIG_AIR_EN8811H_PHY) += air_en8811h.o
obj-$(CONFIG_AMD_PHY) += amd.o
obj-$(CONFIG_AMCC_QT2025_PHY) += qt2025.o
diff --git a/drivers/net/phy/air_an8855.c b/drivers/net/phy/air_an8855.c
new file mode 100644
index 000000000000..a740dbaacf9a
--- /dev/null
+++ b/drivers/net/phy/air_an8855.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Christian Marangi <ansuelsmth@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+
+#define AN8855_PHY_SELECT_PAGE 0x1f
+#define AN8855_PHY_PAGE GENMASK(2, 0)
+#define AN8855_PHY_PAGE_STANDARD FIELD_PREP_CONST(AN8855_PHY_PAGE, 0x0)
+#define AN8855_PHY_PAGE_EXTENDED_1 FIELD_PREP_CONST(AN8855_PHY_PAGE, 0x1)
+
+/* MII Registers Page 1 */
+#define AN8855_PHY_EXT_REG_14 0x14
+#define AN8855_PHY_EN_DOWN_SHIFT BIT(4)
+
+/* R50 Calibration regs in MDIO_MMD_VEND1 */
+#define AN8855_PHY_R500HM_RSEL_TX_AB 0x174
+#define AN8855_PHY_R50OHM_RSEL_TX_A_EN BIT(15)
+#define AN8855_PHY_R50OHM_RSEL_TX_A GENMASK(14, 8)
+#define AN8855_PHY_R50OHM_RSEL_TX_B_EN BIT(7)
+#define AN8855_PHY_R50OHM_RSEL_TX_B GENMASK(6, 0)
+#define AN8855_PHY_R500HM_RSEL_TX_CD 0x175
+#define AN8855_PHY_R50OHM_RSEL_TX_C_EN BIT(15)
+#define AN8855_PHY_R50OHM_RSEL_TX_C GENMASK(14, 8)
+#define AN8855_PHY_R50OHM_RSEL_TX_D_EN BIT(7)
+#define AN8855_PHY_R50OHM_RSEL_TX_D GENMASK(6, 0)
+
+#define AN8855_SWITCH_EFUSE_R50O GENMASK(30, 24)
+
+/* PHY TX PAIR DELAY SELECT Register */
+#define AN8855_PHY_TX_PAIR_DLY_SEL_GBE 0x013
+#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_A_GBE GENMASK(14, 12)
+#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_B_GBE GENMASK(10, 8)
+#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_C_GBE GENMASK(6, 4)
+#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_D_GBE GENMASK(2, 0)
+/* PHY ADC Register */
+#define AN8855_PHY_RXADC_CTRL 0x0d8
+#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_A BIT(12)
+#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_B BIT(8)
+#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_C BIT(4)
+#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_D BIT(0)
+#define AN8855_PHY_RXADC_REV_0 0x0d9
+#define AN8855_PHY_RG_AD_RESERVE0_A GENMASK(15, 8)
+#define AN8855_PHY_RG_AD_RESERVE0_B GENMASK(7, 0)
+#define AN8855_PHY_RXADC_REV_1 0x0da
+#define AN8855_PHY_RG_AD_RESERVE0_C GENMASK(15, 8)
+#define AN8855_PHY_RG_AD_RESERVE0_D GENMASK(7, 0)
+
+#define AN8855_PHY_ID 0xc0ff0410
+
+struct air_an8855_priv {
+ bool needs_calibration;
+};
+
+static const u8 dsa_r50ohm_table[] = {
+ 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+ 127, 127, 127, 127, 127, 127, 127, 126, 122, 117,
+ 112, 109, 104, 101, 97, 94, 90, 88, 84, 80,
+ 78, 74, 72, 68, 66, 64, 61, 58, 56, 53,
+ 51, 48, 47, 44, 42, 40, 38, 36, 34, 32,
+ 31, 28, 27, 24, 24, 22, 20, 18, 16, 16,
+ 14, 12, 11, 9
+};
+
+static int en8855_get_r50ohm_val(struct device *dev, const char *calib_name,
+ u8 *dest)
+{
+ u32 shift_sel, val;
+ int ret;
+ int i;
+
+ ret = nvmem_cell_read_u32(dev, calib_name, &val);
+ if (ret)
+ return ret;
+
+ shift_sel = FIELD_GET(AN8855_SWITCH_EFUSE_R50O, val);
+ for (i = 0; i < ARRAY_SIZE(dsa_r50ohm_table); i++)
+ if (dsa_r50ohm_table[i] == shift_sel)
+ break;
+
+ if (i < 8 || i >= ARRAY_SIZE(dsa_r50ohm_table))
+ *dest = dsa_r50ohm_table[25];
+ else
+ *dest = dsa_r50ohm_table[i - 8];
+
+ return 0;
+}
+
+static int an8855_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct air_an8855_priv *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->needs_calibration = of_property_present(dev->of_node,
+ "nvmem-cells");
+
+ phydev->priv = priv;
+
+ return 0;
+}
+
+static int an8855_get_downshift(struct phy_device *phydev, u8 *data)
+{
+ int val;
+
+ val = phy_read_paged(phydev, AN8855_PHY_PAGE_EXTENDED_1, AN8855_PHY_EXT_REG_14);
+ if (val < 0)
+ return val;
+
+ *data = val & AN8855_PHY_EN_DOWN_SHIFT ? DOWNSHIFT_DEV_DEFAULT_COUNT :
+ DOWNSHIFT_DEV_DISABLE;
+
+ return 0;
+}
+
+static int an8855_set_downshift(struct phy_device *phydev, u8 cnt)
+{
+ u16 ds = cnt != DOWNSHIFT_DEV_DISABLE ? AN8855_PHY_EN_DOWN_SHIFT : 0;
+
+ return phy_modify_paged(phydev, AN8855_PHY_PAGE_EXTENDED_1,
+ AN8855_PHY_EXT_REG_14, AN8855_PHY_EN_DOWN_SHIFT,
+ ds);
+}
+
+static int an8855_config_init(struct phy_device *phydev)
+{
+ struct air_an8855_priv *priv = phydev->priv;
+ struct device *dev = &phydev->mdio.dev;
+ int ret;
+
+ /* Enable HW auto downshift */
+ ret = an8855_set_downshift(phydev, DOWNSHIFT_DEV_DEFAULT_COUNT);
+ if (ret)
+ return ret;
+
+ if (priv->needs_calibration) {
+ u8 calibration_data[4];
+
+ ret = en8855_get_r50ohm_val(dev, "tx_a", &calibration_data[0]);
+ if (ret)
+ return ret;
+
+ ret = en8855_get_r50ohm_val(dev, "tx_b", &calibration_data[1]);
+ if (ret)
+ return ret;
+
+ ret = en8855_get_r50ohm_val(dev, "tx_c", &calibration_data[2]);
+ if (ret)
+ return ret;
+
+ ret = en8855_get_r50ohm_val(dev, "tx_d", &calibration_data[3]);
+ if (ret)
+ return ret;
+
+ ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_R500HM_RSEL_TX_AB,
+ AN8855_PHY_R50OHM_RSEL_TX_A | AN8855_PHY_R50OHM_RSEL_TX_B,
+ FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_A, calibration_data[0]) |
+ FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_B, calibration_data[1]));
+ if (ret)
+ return ret;
+ ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_R500HM_RSEL_TX_CD,
+ AN8855_PHY_R50OHM_RSEL_TX_C | AN8855_PHY_R50OHM_RSEL_TX_D,
+ FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_C, calibration_data[2]) |
+ FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_D, calibration_data[3]));
+ if (ret)
+ return ret;
+ }
+
+ /* Apply values to reduce signal noise */
+ ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_TX_PAIR_DLY_SEL_GBE,
+ FIELD_PREP(AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_A_GBE, 0x4) |
+ FIELD_PREP(AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_C_GBE, 0x4));
+ if (ret)
+ return ret;
+ ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_RXADC_CTRL,
+ AN8855_PHY_RG_AD_SAMNPLE_PHSEL_A |
+ AN8855_PHY_RG_AD_SAMNPLE_PHSEL_C);
+ if (ret)
+ return ret;
+ ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_RXADC_REV_0,
+ FIELD_PREP(AN8855_PHY_RG_AD_RESERVE0_A, 0x1));
+ if (ret)
+ return ret;
+ ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_RXADC_REV_1,
+ FIELD_PREP(AN8855_PHY_RG_AD_RESERVE0_C, 0x1));
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int an8855_get_tunable(struct phy_device *phydev,
+ struct ethtool_tunable *tuna, void *data)
+{
+ switch (tuna->id) {
+ case ETHTOOL_PHY_DOWNSHIFT:
+ return an8855_get_downshift(phydev, data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int an8855_set_tunable(struct phy_device *phydev,
+ struct ethtool_tunable *tuna, const void *data)
+{
+ switch (tuna->id) {
+ case ETHTOOL_PHY_DOWNSHIFT:
+ return an8855_set_downshift(phydev, *(const u8 *)data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int an8855_read_page(struct phy_device *phydev)
+{
+ return __phy_read(phydev, AN8855_PHY_SELECT_PAGE);
+}
+
+static int an8855_write_page(struct phy_device *phydev, int page)
+{
+ return __phy_write(phydev, AN8855_PHY_SELECT_PAGE, page);
+}
+
+static struct phy_driver an8855_driver[] = {
+{
+ PHY_ID_MATCH_EXACT(AN8855_PHY_ID),
+ .name = "Airoha AN8855 internal PHY",
+ /* PHY_GBIT_FEATURES */
+ .flags = PHY_IS_INTERNAL,
+ .probe = an8855_probe,
+ .config_init = an8855_config_init,
+ .soft_reset = genphy_soft_reset,
+ .get_tunable = an8855_get_tunable,
+ .set_tunable = an8855_set_tunable,
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+ .read_page = an8855_read_page,
+ .write_page = an8855_write_page,
+}, };
+
+module_phy_driver(an8855_driver);
+
+static struct mdio_device_id __maybe_unused an8855_tbl[] = {
+ { PHY_ID_MATCH_EXACT(AN8855_PHY_ID) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, an8855_tbl);
+
+MODULE_DESCRIPTION("Airoha AN8855 PHY driver");
+MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>");
+MODULE_LICENSE("GPL");
--
2.51.0
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [net-next PATCH v17 8/8] MAINTAINERS: add myself as maintainer for AN8855
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
` (5 preceding siblings ...)
2025-09-11 13:39 ` [net-next PATCH v17 7/8] net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY Christian Marangi
@ 2025-09-11 13:39 ` Christian Marangi
6 siblings, 0 replies; 13+ messages in thread
From: Christian Marangi @ 2025-09-11 13:39 UTC (permalink / raw)
To: Christian Marangi, Lee Jones, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Heiner Kallweit,
Russell King, Simon Horman, Chester A. Unal, Daniel Golle,
DENG Qingfang, Sean Wang, Matthias Brugger,
AngeloGioacchino Del Regno, linux-arm-kernel, linux-mediatek,
netdev, devicetree, linux-kernel
Add myself as maintainer for AN8855 DSA driver and all the related
subdriver (mfd, mdio, phy, nvmem)
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
MAINTAINERS | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index b81595e9ea95..818fe884fb0a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -740,6 +740,22 @@ S: Maintained
F: Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml
F: drivers/net/ethernet/airoha/
+AIROHA AN8855 DSA DRIVER
+M: Christian Marangi <ansuelsmth@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/airoha,an8855.yaml
+F: Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
+F: Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
+F: Documentation/devicetree/bindings/nvmem/airoha,an8855-efuse.yaml
+F: drivers/mfd/airoha-an8855.c
+F: drivers/net/dsa/an8855.c
+F: drivers/net/dsa/an8855.h
+F: drivers/net/phy/air_an8855.c
+F: drivers/nvmem/an8855-efuse.c
+
AIROHA PCIE PHY DRIVER
M: Lorenzo Bianconi <lorenzo@kernel.org>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
--
2.51.0
^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [net-next PATCH v17 3/8] dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC
2025-09-11 13:39 ` [net-next PATCH v17 3/8] dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC Christian Marangi
@ 2025-09-12 14:23 ` Rob Herring (Arm)
0 siblings, 0 replies; 13+ messages in thread
From: Rob Herring (Arm) @ 2025-09-12 14:23 UTC (permalink / raw)
To: Christian Marangi
Cc: linux-mediatek, Conor Dooley, Krzysztof Kozlowski, devicetree,
netdev, linux-kernel, Lee Jones, Paolo Abeni, Andrew Lunn,
Russell King, Vladimir Oltean, Matthias Brugger, Simon Horman,
linux-arm-kernel, DENG Qingfang, Sean Wang, Heiner Kallweit,
Chester A. Unal, AngeloGioacchino Del Regno, Eric Dumazet,
David S. Miller, Jakub Kicinski, Daniel Golle
On Thu, 11 Sep 2025 15:39:18 +0200, Christian Marangi wrote:
> Document support for Airoha AN8855 Switch SoC. This SoC expose various
> peripherals like an Ethernet Switch, a NVMEM provider and Ethernet PHYs.
>
> It does also support i2c and timers but those are not currently
> supported/used.
>
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> ---
> .../bindings/mfd/airoha,an8855.yaml | 173 ++++++++++++++++++
> 1 file changed, 173 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/airoha,an8855.yaml
>
My bot found errors running 'make dt_binding_check' on your patch:
yamllint warnings/errors:
dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/airoha,an8855.yaml:
Error in referenced schema matching $id: http://devicetree.org/schemas/nvmem/airoha,an8855-efuse.yaml
Tried these paths (check schema $id if path is wrong):
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/nvmem/airoha,an8855-efuse.yaml
/usr/local/lib/python3.13/dist-packages/dtschema/schemas/nvmem/airoha,an8855-efuse.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/airoha,an8855.example.dtb: soc@1 (airoha,an8855): efuse: {'compatible': ['airoha,an8855-efuse'], '#nvmem-cell-cells': 0, 'nvmem-layout': {'compatible': ['fixed-layout'], '#address-cells': 1, '#size-cells': 1, 'shift-sel-port0-tx-a@c': {'reg': [[12, 4]], 'phandle': 3}, 'shift-sel-port0-tx-b@10': {'reg': [[16, 4]], 'phandle': 4}, 'shift-sel-port0-tx-c@14': {'reg': [[20, 4]], 'phandle': 5}, 'shift-sel-port0-tx-d@18': {'reg': [[24, 4]], 'phandle': 6}, 'shift-sel-port1-tx-a@1c': {'reg': [[28, 4]], 'phandle': 7}, 'shift-sel-port1-tx-b@20': {'reg': [[32, 4]], 'phandle': 8}, 'shift-sel-port1-tx-c@24': {'reg': [[36, 4]], 'phandle': 9}, 'shift-sel-port1-tx-d@28': {'reg': [[40, 4]], 'phandle': 10}}} should not be valid under {'description': "Can't find referenced schema: http://devicetree.org/schemas/nvmem/airoha,an8855-efuse.yaml#"}
from schema $id: http://devicetree.org/schemas/mfd/airoha,an8855.yaml#
Documentation/devicetree/bindings/mfd/airoha,an8855.example.dtb: /example-0/mdio/soc@1/efuse: failed to match any schema with compatible: ['airoha,an8855-efuse']
doc reference errors (make refcheckdocs):
See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250911133929.30874-4-ansuelsmth@gmail.com
The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD
2025-09-11 13:39 ` [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD Christian Marangi
@ 2025-09-13 13:01 ` Simon Horman
2025-09-13 13:04 ` Christian Marangi
0 siblings, 1 reply; 13+ messages in thread
From: Simon Horman @ 2025-09-13 13:01 UTC (permalink / raw)
To: Christian Marangi
Cc: Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Vladimir Oltean, Heiner Kallweit, Russell King,
Chester A. Unal, Daniel Golle, DENG Qingfang, Sean Wang,
Matthias Brugger, AngeloGioacchino Del Regno, linux-arm-kernel,
linux-mediatek, netdev, devicetree, linux-kernel
On Thu, Sep 11, 2025 at 03:39:21PM +0200, Christian Marangi wrote:
> Add support for Airoha AN8855 Switch MFD that provide support for a DSA
> switch and a NVMEM provider.
>
> Also make use of the mdio-regmap driver and register a regmap for each
> internal PHY of the switch.
> This is needed to handle the double usage of the PHYs as both PHY and
> Switch accessor.
>
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
...
> diff --git a/drivers/mfd/airoha-an8855.c b/drivers/mfd/airoha-an8855.c
...
> +static int an855_mdio_register(struct device *dev, struct an8855_core_priv *priv)
> +{
> + struct device_node *mdio_np;
> + int ret;
> +
> + mdio_np = of_get_child_by_name(dev->of_node, "mdio");
> + if (!mdio_np)
> + return -ENODEV;
> +
> + for_each_available_child_of_node_scoped(mdio_np, phy_np) {
> + ret = an8855_phy_register(dev, priv, phy_np);
> + if (ret)
> + break;
> + }
Hi Christian,
Maybe it cannot happen, but if the loop above iterates zero times,
then ret will be used uninitialised below.
Flagged by Smatch.
> +
> + of_node_put(mdio_np);
> + return ret;
> +}
...
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [net-next PATCH v17 1/8] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch
2025-09-11 13:39 ` [net-next PATCH v17 1/8] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch Christian Marangi
@ 2025-09-13 13:02 ` Simon Horman
0 siblings, 0 replies; 13+ messages in thread
From: Simon Horman @ 2025-09-13 13:02 UTC (permalink / raw)
To: Christian Marangi
Cc: Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Vladimir Oltean, Heiner Kallweit, Russell King,
Chester A. Unal, Daniel Golle, DENG Qingfang, Sean Wang,
Matthias Brugger, AngeloGioacchino Del Regno, linux-arm-kernel,
linux-mediatek, netdev, devicetree, linux-kernel
On Thu, Sep 11, 2025 at 03:39:16PM +0200, Christian Marangi wrote:
> Document support for Airoha AN8855 5-port Gigabit Switch.
>
> It does expose the 5 Internal PHYs on the MDIO bus and each port
> can access the Switch register space by configurting the PHY page.
nit: configuring
>
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
> ---
> .../net/dsa/airoha,an8855-switch.yaml | 86 +++++++++++++++++++
> 1 file changed, 86 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
>
> diff --git a/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml b/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
> new file mode 100644
> index 000000000000..fbb9219fadae
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
> @@ -0,0 +1,86 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/dsa/airoha,an8855-switch.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Airoha AN8855 Gigabit Switch
> +
> +maintainers:
> + - Christian Marangi <ansuelsmth@gmail.com>
> +
> +description: >
> + Airoha AN8855 is a 5-port Gigabit Switch.
> +
> + It does expose the 5 Internal PHYs on the MDIO bus and each port
> + can access the Switch register space by configurting the PHY page.
Likewise here.
...
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD
2025-09-13 13:01 ` Simon Horman
@ 2025-09-13 13:04 ` Christian Marangi
2025-09-15 11:00 ` Simon Horman
0 siblings, 1 reply; 13+ messages in thread
From: Christian Marangi @ 2025-09-13 13:04 UTC (permalink / raw)
To: Simon Horman
Cc: Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Vladimir Oltean, Heiner Kallweit, Russell King,
Chester A. Unal, Daniel Golle, DENG Qingfang, Sean Wang,
Matthias Brugger, AngeloGioacchino Del Regno, linux-arm-kernel,
linux-mediatek, netdev, devicetree, linux-kernel
On Sat, Sep 13, 2025 at 02:01:37PM +0100, Simon Horman wrote:
> On Thu, Sep 11, 2025 at 03:39:21PM +0200, Christian Marangi wrote:
> > Add support for Airoha AN8855 Switch MFD that provide support for a DSA
> > switch and a NVMEM provider.
> >
> > Also make use of the mdio-regmap driver and register a regmap for each
> > internal PHY of the switch.
> > This is needed to handle the double usage of the PHYs as both PHY and
> > Switch accessor.
> >
> > Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
>
> ...
>
> > diff --git a/drivers/mfd/airoha-an8855.c b/drivers/mfd/airoha-an8855.c
>
> ...
>
> > +static int an855_mdio_register(struct device *dev, struct an8855_core_priv *priv)
> > +{
> > + struct device_node *mdio_np;
> > + int ret;
> > +
> > + mdio_np = of_get_child_by_name(dev->of_node, "mdio");
> > + if (!mdio_np)
> > + return -ENODEV;
> > +
> > + for_each_available_child_of_node_scoped(mdio_np, phy_np) {
> > + ret = an8855_phy_register(dev, priv, phy_np);
> > + if (ret)
> > + break;
> > + }
>
> Hi Christian,
>
> Maybe it cannot happen, but if the loop above iterates zero times,
> then ret will be used uninitialised below.
>
> Flagged by Smatch.
>
Do you have hint of how to run smatch on this? Is there a simple arg to
make to enable this?
Anyway yes it goes against schema but it's possible somehow to have a
very broken DT node with no phy in it.
> > +
> > + of_node_put(mdio_np);
> > + return ret;
> > +}
>
> ...
--
Ansuel
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD
2025-09-13 13:04 ` Christian Marangi
@ 2025-09-15 11:00 ` Simon Horman
0 siblings, 0 replies; 13+ messages in thread
From: Simon Horman @ 2025-09-15 11:00 UTC (permalink / raw)
To: Christian Marangi
Cc: Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Vladimir Oltean, Heiner Kallweit, Russell King,
Chester A. Unal, Daniel Golle, DENG Qingfang, Sean Wang,
Matthias Brugger, AngeloGioacchino Del Regno, linux-arm-kernel,
linux-mediatek, netdev, devicetree, linux-kernel
On Sat, Sep 13, 2025 at 03:04:40PM +0200, Christian Marangi wrote:
> On Sat, Sep 13, 2025 at 02:01:37PM +0100, Simon Horman wrote:
> > On Thu, Sep 11, 2025 at 03:39:21PM +0200, Christian Marangi wrote:
> > > Add support for Airoha AN8855 Switch MFD that provide support for a DSA
> > > switch and a NVMEM provider.
> > >
> > > Also make use of the mdio-regmap driver and register a regmap for each
> > > internal PHY of the switch.
> > > This is needed to handle the double usage of the PHYs as both PHY and
> > > Switch accessor.
> > >
> > > Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> >
> > ...
> >
> > > diff --git a/drivers/mfd/airoha-an8855.c b/drivers/mfd/airoha-an8855.c
> >
> > ...
> >
> > > +static int an855_mdio_register(struct device *dev, struct an8855_core_priv *priv)
> > > +{
> > > + struct device_node *mdio_np;
> > > + int ret;
> > > +
> > > + mdio_np = of_get_child_by_name(dev->of_node, "mdio");
> > > + if (!mdio_np)
> > > + return -ENODEV;
> > > +
> > > + for_each_available_child_of_node_scoped(mdio_np, phy_np) {
> > > + ret = an8855_phy_register(dev, priv, phy_np);
> > > + if (ret)
> > > + break;
> > > + }
> >
> > Hi Christian,
> >
> > Maybe it cannot happen, but if the loop above iterates zero times,
> > then ret will be used uninitialised below.
> >
> > Flagged by Smatch.
> >
>
> Do you have hint of how to run smatch on this? Is there a simple arg to
> make to enable this?
Perhaps not so simple, but also not so difficult.
1. Checkout Smatch from and compile
Smatch can be found in Git here:
https://github.com/error27/smatch/commits/master/
2. Prepare kernel
e.g. make allmodconfig
3. Run Smatch
PATH="$PATH:.../smatch/bin" \
.../smatch/smatch_scripts/kchecker drivers/mfd/airoha-an8855.o
[ snip ]
drivers/mfd/airoha-an8855.c:439 an855_mdio_register() error: uninitialized symbol 'ret'.
> Anyway yes it goes against schema but it's possible somehow to have a
> very broken DT node with no phy in it.
Understood, thanks.
...
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2025-09-15 11:00 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-09-11 13:39 [net-next PATCH v17 0/8] net: dsa: Add Airoha AN8855 support Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 1/8] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch Christian Marangi
2025-09-13 13:02 ` Simon Horman
2025-09-11 13:39 ` [net-next PATCH v17 2/8] dt-bindings: net: Document support for AN8855 Switch Internal PHY Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 3/8] dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC Christian Marangi
2025-09-12 14:23 ` Rob Herring (Arm)
2025-09-11 13:39 ` [net-next PATCH v17 4/8] net: dsa: tag_mtk: add Airoha variant usage of this TAG Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 6/8] mfd: an8855: Add support for Airoha AN8855 Switch MFD Christian Marangi
2025-09-13 13:01 ` Simon Horman
2025-09-13 13:04 ` Christian Marangi
2025-09-15 11:00 ` Simon Horman
2025-09-11 13:39 ` [net-next PATCH v17 7/8] net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY Christian Marangi
2025-09-11 13:39 ` [net-next PATCH v17 8/8] MAINTAINERS: add myself as maintainer for AN8855 Christian Marangi
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