linux-kernel - [PATCH v4 3/7] PWM: add pwm-stm32 DT bindings

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Message-Id: <1481027929-13704-4-git-send-email-benjamin.gaignard@st.com>
Date:   Tue,  6 Dec 2016 13:38:45 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...aro.org>
To:     lee.jones@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        alexandre.torgue@...com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, thierry.reding@...il.com,
        linux-pwm@...r.kernel.org, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, linux-iio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     fabrice.gasnier@...com, gerald.baeza@...com,
        arnaud.pouliquen@...com, linus.walleij@...aro.org,
        linaro-kernel@...ts.linaro.org, benjamin.gaignard@...aro.org,
        Benjamin Gaignard <benjamin.gaignard@...com>
Subject: [PATCH v4 3/7] PWM: add pwm-stm32 DT bindings

Define bindings for pwm-stm32

version 2:
- use parameters instead of compatible of handle the hardware configuration

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
---
 .../devicetree/bindings/pwm/pwm-stm32.txt          | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/pwm-stm32.txt

diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
new file mode 100644
index 0000000..c0cc246
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
@@ -0,0 +1,33 @@
+STMicroelectronics STM32 General Purpose Timer PWM bindings
+
+Must be a sub-node of an STM32 General Purpose Timer device tree node.
+See ../mfd/stm32-general-purpose-timer.txt for details about the parent node.
+
+Required parameters:
+- compatible:		Must be "st,stm32-pwm".
+- pinctrl-names: 	Set to "default".
+- pinctrl-0: 		List of phandles pointing to pin configuration nodes for PWM module.
+			For Pinctrl properties see ../pinctrl/pinctrl-bindings.txt
+
+Optional parameters:
+- st,breakinput-polarity: If present, a break input is available
+            for the channel. In that case the property value denotes the
+            polarity of the break input:
+            - 0: active low
+            - 1: active high
+
+Example:
+	gptimer@...10000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "st,stm32-gptimer";
+		reg = <0x40010000 0x400>;
+		clocks = <&rcc 0 160>;
+		clock-names = "clk_int";
+
+		pwm@0 {
+			compatible = "st,stm32-pwm";
+			pinctrl-0	= <&pwm1_pins>;
+			pinctrl-names	= "default";
+		};
+	};
-- 
1.9.1