2016-11-27 15:25 GMT+01:00 Jonathan Cameron [off-list ref]:

On 24/11/16 15:14, Benjamin Gaignard wrote:

quoted

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 <redacted>
---
 .../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

Add a cross reference...

I will add it in v3

quoted

+
+Required parameters:
+- compatible:                must be "st,stm32-iio-timer"

st,stm32-adc-timer or something like that.

I would prefer use st,stm32-timer-trigger because triggers can be used
for multiple other devices (dac, adc, timers)

quoted

+- 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

What are input / output triggers?

each hardware block can be the source of triggers (output triggers) or customer
of some other trigger (input triggers).That what I have tried to
describe in those two
parameters

quoted

+
+Possible triggers are defined in include/dt-bindings/iio/timer/st,stm32-iio-timer.h
+
+Example:
+     gptimer1: gptimer1@40010000 {
+             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;
+             };
+     };