From: Joshua Henderson <joshua.henderson@microchip.com>
To: <linux-kernel@vger.kernel.org>
Cc: <linux-mips@linux-mips.org>,
Purna Chandra Mandal <purna.mandal@microchip.com>,
Joshua Henderson <joshua.henderson@microchip.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>, <devicetree@vger.kernel.org>
Subject: [PATCH 1/2] dt/bindings: Add bindings for the PIC32 SPI peripheral
Date: Mon, 1 Feb 2016 15:44:56 -0700 [thread overview]
Message-ID: <1454366701-10847-1-git-send-email-joshua.henderson@microchip.com> (raw)
From: Purna Chandra Mandal <purna.mandal@microchip.com>
Document the devicetree bindings for the SPI peripheral found
on Microchip PIC32 class devices.
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
---
.../bindings/spi/microchip,spi-pic32.txt | 44 ++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt
diff --git a/Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt b/Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt
new file mode 100644
index 0000000..a555618
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt
@@ -0,0 +1,44 @@
+* Microchip PIC32 SPI device
+
+Required properties:
+- compatible: Should be "microchip,pic32mzda-spi".
+- reg: Address and length of the register set for the device
+- interrupts: Should contain all three spi interrupts in sequence
+ of <fault-irq>, <receive-irq>, <transmit-irq>.
+- interrupt-names: Should be "fault","rx","tx" in order.
+- clocks: phandles of baud generation clocks. Maximum two possible clocks
+ can be provided (&PBCLK2, &REFCLKO1).
+ See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+- clock-names: Should be "mck0","mck1".
+ See: Documentation/devicetree/bindings/resource-names.txt
+- pinctrl-names: A pinctrl state names "default" must be defined.
+- pinctrl-0: Phandle referencing pin configuration of the SPI peripheral.
+ See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
+
+Optional properties:
+- cs-gpios: List of GPIO chip selects. See ../spi/spi-bus.txt
+ See: Documentation/devicetree/bindings/spi/spi-bus.txt
+- dmas: Two or more DMA channel specifiers following the convention outlined
+ in Documentation/devicetree/bindings/dma/dma.txt
+- dma-names: Names for the dma channels. There must be at least one channel
+ named "spi-tx" for transmit and named "spi-rx" for receive.
+
+Example:
+
+ spi1:spi@0x1f821000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "microchip,pic32mzda-spi";
+ reg = <0x1f821000 0x200>;
+ interrupts = <109 IRQ_TYPE_LEVEL_HIGH>,
+ <110 IRQ_TYPE_LEVEL_HIGH>,
+ <111 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "fault", "rx", "tx";
+ clocks = <&PBCLK2>, <&REFCLKO1>;
+ clock-names = "mck0", "mck1";
+ dmas = <&dma 134>,
+ <&dma 135>;
+ dma-names = "spi-rx", "spi-tx";
+ cs-gpios = <&gpio3 0 GPIO_ACTIVE_LOW>,
+ <&gpio3 14 GPIO_ACTIVE_LOW>;
+ };
--
1.7.9.5
next reply other threads:[~2016-02-01 22:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-01 22:44 Joshua Henderson [this message]
2016-02-01 22:44 ` [PATCH 2/2] spi: spi-pic32: Add PIC32 SPI master driver Joshua Henderson
2016-02-02 12:13 ` Mark Brown
2016-02-05 11:57 ` Purna Chandra Mandal
2016-02-02 11:11 ` [PATCH 1/2] dt/bindings: Add bindings for the PIC32 SPI peripheral Sergei Shtylyov
2016-02-05 5:08 ` Purna Chandra Mandal
2016-02-05 13:32 ` Sergei Shtylyov
2016-02-08 5:06 ` Purna Chandra Mandal
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