linux-kernel - [PATCH v2 5/7] IIO: add bindings for stm32 IIO timer driver

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Message-Id: <1480000463-9625-6-git-send-email-benjamin.gaignard@st.com>
Date:   Thu, 24 Nov 2016 16:14:21 +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 v2 5/7] IIO: add bindings for stm32 IIO timer driver

Define bindings for stm32 IIO timer

version 2:
- only keep one compatible
- add DT parameters to set lists of the triggers:
  one list describe the triggers created by the device
  another one give the triggers accepted by the device

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
---
 .../bindings/iio/timer/stm32-iio-timer.txt         | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt

diff --git a/Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt b/Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt
new file mode 100644
index 0000000..840b417
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt
@@ -0,0 +1,41 @@
+timer IIO trigger bindings for STM32
+
+Must be a sub-node of STM32 general purpose timer driver
+
+Required parameters:
+- compatible:		must be "st,stm32-iio-timer"
+- interrupts:		Interrupt for this device
+			See ../interrupt-controller/st,stm32-exti.txt
+
+Optional parameters:
+- st,input-triggers-names:	List of the possible input triggers for
+				the device
+- st,output-triggers-names:	List of the possible output triggers for
+				the device
+
+Possible triggers are defined in include/dt-bindings/iio/timer/st,stm32-iio-timer.h
+
+Example:
+	gptimer1: gptimer1@...10000 {
+		compatible = "st,stm32-gptimer";
+		reg = <0x40010000 0x400>;
+		clocks = <&rcc 0 160>;
+		clock-names = "clk_int";
+
+		pwm1@0 {
+			compatible = "st,stm32-pwm";
+			st,pwm-num-chan = <4>;
+			st,breakinput;
+			st,complementary;
+		};
+
+		iiotimer1@0 {
+			compatible = "st,stm32-iio-timer";
+			interrupts = <27>;
+			st,input-triggers-names = TIM5_TRGO,
+						  TIM2_TRGO,
+						  TIM4_TRGO,
+						  TIM3_TRGO;
+			st,output-triggers-names = TIM1_TRGO;
+		};
+	};
-- 
1.9.1