2016-11-27 15:25 GMT+01:00 Jonathan Cameron <jic23@xxxxxxxxxx>:
> On 24/11/16 15:14, Benjamin Gaignard wrote:
>> 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@xxxxxx>
>> ---
>> .../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
>> +
>> +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)
>> +- 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
>> +
>> +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;
>> + };
>> + };
>>
>
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