On Fri, 16 Jun 2017, Fabrice Gasnier wrote:
> Add documentation for STMicroelectronics STM32 Low Power Timer binding.
>
> Signed-off-by: Fabrice Gasnier <[email protected]>
> ---
> .../devicetree/bindings/mfd/stm32-lptimer.txt | 51
> ++++++++++++++++++++++
> 1 file changed, 51 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..237b7d6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/stm32-lptimer.txt
> @@ -0,0 +1,51 @@
> +STMicroelectronics STM32 Low Power Timer
> +
> +The STM32 Low Power Timer (LPTIM) is a 16-bit timer that provides several
> +functionalities:
"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 "int".
These look better when padded:
- 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 "int".
> +- #address-cells = <1>;
> +- #size-cells = <0>;
Please use the same format as you did for the other properties.
> +Optional properties:
> +- resets: Must contain the phandle to the reset controller.
> +
> +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@0x40002400 {
Remove '0x'
> + compatible = "st,stm32-lptimer";
> + reg = <0x40002400 0x400>;
> + clocks = <&timer_clk>;
> + clock-names = "int";
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + pwm {
> + compatible = "st,stm32-pwm-lp";
> + pinctrl-names = "default";
> + pinctrl-0 = <&lppwm1_pins>;
> + };
> +
> + trigger@0 {
Why is this @0 and no reg properties are provided for the other 2
nodes?
> + compatible = "st,stm32-lptimer-trigger";
> + reg = <0>;
> + };
> +
> + counter {
> + compatible = "st,stm32-lptimer-counter";
> + pinctrl-names = "default";
> + pinctrl-0 = <&lptim1_in_pins>;
> + };
> + };
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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