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SubjectRe: [PATCH v2 1/8] dt-bindings: mfd: Add STM32 LPTimer binding
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On 06/26/2017 08:07 PM, Rob Herring wrote:
> On Wed, Jun 21, 2017 at 04:30:08PM +0200, Fabrice Gasnier wrote:
>> Add documentation for STMicroelectronics STM32 Low-Power Timer binding.
>>
>> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
>> ---
>> Changes in v2:
>> - Lee's comments: s/Low Power/Low-Power/, remove 0x in example, improve
>> properties descriptions
>> ---
>> .../devicetree/bindings/mfd/stm32-lptimer.txt | 48 ++++++++++++++++++++++
>> 1 file changed, 48 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/mfd/stm32-lptimer.txt
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/stm32-lptimer.txt b/Documentation/devicetree/bindings/mfd/stm32-lptimer.txt
>> new file mode 100644
>> index 0000000..af859c8
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/stm32-lptimer.txt
>> @@ -0,0 +1,48 @@
>> +STMicroelectronics STM32 Low-Power Timer
>> +
>> +The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several
>> +functions:
>> +- PWM output (with programmable prescaler, configurable polarity)
>> +- Quadrature encoder, counter
>> +- Trigger source for STM32 ADC/DAC (LPTIM_OUT)
>> +
>> +Required properties:
>> +- compatible: Must be "st,stm32-lptimer".
>> +- reg: Offset and length of the device's register set.
>> +- clocks: Phandle to the clock used by the LP Timer module.
>> +- clock-names: Must be "mux".
>> +- #address-cells: Should be '<1>'.
>> +- #size-cells: Should be '<0>'.
>> +
>> +Optional subnodes:
>> +- pwm: See ../pwm/pwm-stm32-lp.txt
>> +- counter: See ../iio/timer/stm32-lptimer-cnt.txt
>> +- trigger: See ../iio/timer/stm32-lptimer-trigger.txt
>> +
>> +Example:
>> +
>> + lptimer1: lptimer@40002400 {
>
> timer@...

Hi Rob,

I initially put "lptimer" here to distinguish Low-Power Timer hardware
from other "timers" hardware that can be found also on stm32 devices.
I'd prefer to keep it, is it sensible from your point of view ?
Please advise.

>
>> + compatible = "st,stm32-lptimer";
>> + reg = <0x40002400 0x400>;
>> + clocks = <&timer_clk>;
>> + clock-names = "mux";
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm-lp";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&lppwm1_pins>;
>> + };
>> +
>> + trigger@0 {
>> + compatible = "st,stm32-lptimer-trigger";
>> + reg = <0>;
>
> Is there more than 1?

reg identifies trigger hardware block.

Best Regards,
Thanks,
Fabrice

>
>> + };
>> +
>> + counter {
>> + compatible = "st,stm32-lptimer-counter";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&lptim1_in_pins>;
>> + };
>> + };
>> --
>> 1.9.1
>>

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