From: "Thomas Weißschuh" <linux@weissschuh.net>
To: Jean Delvare <jdelvare@suse.com>,
Guenter Roeck <linux@roeck-us.net>,
Benson Leung <bleung@chromium.org>, Lee Jones <lee@kernel.org>
Cc: "Guenter Roeck" <groeck@chromium.org>,
linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org,
chrome-platform@lists.linux.dev,
"Dustin Howett" <dustin@howett.net>,
"Mario Limonciello" <mario.limonciello@amd.com>,
"Moritz Fischer" <mdf@kernel.org>,
"Thomas Weißschuh" <linux@weissschuh.net>
Subject: [PATCH v2 0/2] ChromeOS Embedded controller hwmon driver
Date: Tue, 07 May 2024 18:29:21 +0200 [thread overview]
Message-ID: <20240507-cros_ec-hwmon-v2-0-1222c5fca0f7@weissschuh.net> (raw)
Add a hwmon driver that reports fan and temperature readings from the
ChromeOS Embedded controller.
There was an earlier effort in 2017 to add such a driver [0], but there
was no followup after v1.
The new driver is complete reimplementation based on newer APIs and with
more features (temp sensor names).
It only works on LPC-connected ECs, as only those implement direct
memory-map access.
For other busses the data would need to be read with a command.
Adding some helpers was discussed in the previous patchset [1].
The EC protocols also support reading and writing fan curves but that is
not implemented.
Tested on a Framework 13 AMD, Firmware 3.05.
[0] https://lore.kernel.org/all/1491602410-31518-1-git-send-email-moritz.fischer@ettus.com/
[1] https://lore.kernel.org/all/ac61bfca-bfa0-143b-c9ca-365b8026ce8d@roeck-us.net/
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
---
Changes in v2:
- drop unnecessary range checks (Guenter)
- only validate thermal_version during probing
- reorder some variable declarations
- validate thermal_version directly in cros_ec_hwmon_probe (Mario)
- drop return value from probe_temp_sensors as it can't fail anymore
- fail with -ENODEV if cmd_readmem is missing to avoid spurious warnings
- Link to v1: https://lore.kernel.org/r/20240507-cros_ec-hwmon-v1-0-2c47c5ce8e85@weissschuh.net
---
Thomas Weißschuh (2):
hwmon: add ChromeOS EC driver
mfd: cros_ec: Register hardware monitoring subdevice
Documentation/hwmon/cros_ec_hwmon.rst | 26 ++++
Documentation/hwmon/index.rst | 1 +
MAINTAINERS | 8 +
drivers/hwmon/Kconfig | 11 ++
drivers/hwmon/Makefile | 1 +
drivers/hwmon/cros_ec_hwmon.c | 269 ++++++++++++++++++++++++++++++++++
drivers/mfd/cros_ec_dev.c | 1 +
7 files changed, 317 insertions(+)
---
base-commit: 2fbe479c0024e1c6b992184a799055e19932aa48
change-id: 20240506-cros_ec-hwmon-24634b07cf6f
Best regards,
--
Thomas Weißschuh <linux@weissschuh.net>
next reply other threads:[~2024-05-07 16:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-07 16:29 Thomas Weißschuh [this message]
2024-05-07 16:29 ` [PATCH v2 1/2] hwmon: add ChromeOS EC driver Thomas Weißschuh
2024-05-07 20:55 ` Guenter Roeck
2024-05-07 21:59 ` Thomas Weißschuh
2024-05-24 23:13 ` Stephen Horvath
2024-05-27 19:24 ` Thomas Weißschuh
2024-05-28 0:15 ` Stephen Horvath
2024-05-28 15:50 ` Guenter Roeck
2024-05-28 16:15 ` Thomas Weißschuh
2024-05-28 23:29 ` Guenter Roeck
2024-05-29 0:58 ` Stephen Horvath
2024-05-29 6:23 ` Thomas Weißschuh
2024-05-29 7:40 ` Stephen Horvath
2024-05-07 16:29 ` [PATCH v2 2/2] mfd: cros_ec: Register hardware monitoring subdevice Thomas Weißschuh
2024-05-07 19:03 ` [PATCH v2 0/2] ChromeOS Embedded controller hwmon driver Mario Limonciello
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