dt-bindings: mfd: Convert stm32 low power timers bindings to json-schema
Convert the STM32 low power timers binding to DT schema format using json-schema Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Rob Herring <robh@kernel.org>
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Benjamin Gaignard
Rob Herring
parent
b9da2fcc5e
commit
b88091f5d8
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STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter
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STM32 Low-Power Timer provides several counter modes. It can be used as:
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- quadrature encoder to detect angular position and direction of rotary
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elements, from IN1 and IN2 input signals.
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- simple counter from IN1 input signal.
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Must be a sub-node of an STM32 Low-Power Timer device tree node.
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See ../mfd/stm32-lptimer.txt for details about the parent node.
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Required properties:
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- compatible: Must be "st,stm32-lptimer-counter".
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- pinctrl-names: Set to "default". An additional "sleep" state can be
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defined to set pins in sleep state.
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- pinctrl-n: List of phandles pointing to pin configuration nodes,
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to set IN1/IN2 pins in mode of operation for Low-Power
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Timer input on external pin.
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Example:
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timer@40002400 {
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compatible = "st,stm32-lptimer";
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...
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counter {
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compatible = "st,stm32-lptimer-counter";
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pinctrl-names = "default", "sleep";
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pinctrl-0 = <&lptim1_in_pins>;
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pinctrl-1 = <&lptim1_sleep_in_pins>;
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};
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};
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STMicroelectronics STM32 Low-Power Timer Trigger
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STM32 Low-Power Timer provides trigger source (LPTIM output) that can be used
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by STM32 internal ADC and/or DAC.
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Must be a sub-node of an STM32 Low-Power Timer device tree node.
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See ../mfd/stm32-lptimer.txt for details about the parent node.
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Required properties:
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- compatible: Must be "st,stm32-lptimer-trigger".
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- reg: Identify trigger hardware block. Must be 0, 1 or 2
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respectively for lptimer1, lptimer2 or lptimer3
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trigger output.
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Example:
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timer@40002400 {
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compatible = "st,stm32-lptimer";
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...
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trigger@0 {
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compatible = "st,stm32-lptimer-trigger";
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reg = <0>;
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};
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};
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/mfd/st,stm32-lptimer.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: STMicroelectronics STM32 Low-Power Timers bindings
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description: |
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The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several
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functions
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- PWM output (with programmable prescaler, configurable polarity)
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- Trigger source for STM32 ADC/DAC (LPTIM_OUT)
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- Several counter modes:
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- quadrature encoder to detect angular position and direction of rotary
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elements, from IN1 and IN2 input signals.
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- simple counter from IN1 input signal.
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maintainers:
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- Fabrice Gasnier <fabrice.gasnier@st.com>
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properties:
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compatible:
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const: st,stm32-lptimer
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: mux
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"#address-cells":
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const: 1
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"#size-cells":
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const: 0
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pwm:
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type: object
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properties:
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compatible:
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const: st,stm32-pwm-lp
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"#pwm-cells":
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const: 3
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required:
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- "#pwm-cells"
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- compatible
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patternProperties:
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"^trigger@[0-9]+$":
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type: object
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properties:
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compatible:
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const: st,stm32-lptimer-trigger
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reg:
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description: Identify trigger hardware block.
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items:
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minimum: 0
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maximum: 2
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required:
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- compatible
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- reg
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counter:
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type: object
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properties:
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compatible:
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const: st,stm32-lptimer-counter
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required:
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- compatible
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required:
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- "#address-cells"
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- "#size-cells"
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- compatible
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- reg
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- clocks
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- clock-names
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/stm32mp1-clks.h>
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timer@40002400 {
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compatible = "st,stm32-lptimer";
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reg = <0x40002400 0x400>;
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clocks = <&timer_clk>;
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clock-names = "mux";
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#address-cells = <1>;
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#size-cells = <0>;
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pwm {
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compatible = "st,stm32-pwm-lp";
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#pwm-cells = <3>;
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};
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trigger@0 {
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compatible = "st,stm32-lptimer-trigger";
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reg = <0>;
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};
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counter {
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compatible = "st,stm32-lptimer-counter";
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};
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};
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...
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@ -1,48 +0,0 @@
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STMicroelectronics STM32 Low-Power Timer
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The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several
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functions:
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- PWM output (with programmable prescaler, configurable polarity)
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- Quadrature encoder, counter
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- Trigger source for STM32 ADC/DAC (LPTIM_OUT)
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Required properties:
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- compatible: Must be "st,stm32-lptimer".
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- reg: Offset and length of the device's register set.
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- clocks: Phandle to the clock used by the LP Timer module.
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- clock-names: Must be "mux".
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- #address-cells: Should be '<1>'.
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- #size-cells: Should be '<0>'.
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Optional subnodes:
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- pwm: See ../pwm/pwm-stm32-lp.txt
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- counter: See ../counter/stm32-lptimer-cnt.txt
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- trigger: See ../iio/timer/stm32-lptimer-trigger.txt
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Example:
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timer@40002400 {
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compatible = "st,stm32-lptimer";
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reg = <0x40002400 0x400>;
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clocks = <&timer_clk>;
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clock-names = "mux";
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#address-cells = <1>;
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#size-cells = <0>;
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pwm {
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compatible = "st,stm32-pwm-lp";
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pinctrl-names = "default";
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pinctrl-0 = <&lppwm1_pins>;
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};
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trigger@0 {
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compatible = "st,stm32-lptimer-trigger";
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reg = <0>;
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};
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counter {
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compatible = "st,stm32-lptimer-counter";
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pinctrl-names = "default";
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pinctrl-0 = <&lptim1_in_pins>;
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};
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};
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@ -1,30 +0,0 @@
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STMicroelectronics STM32 Low-Power Timer PWM
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STM32 Low-Power Timer provides single channel PWM.
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Must be a sub-node of an STM32 Low-Power Timer device tree node.
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See ../mfd/stm32-lptimer.txt for details about the parent node.
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Required parameters:
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- compatible: Must be "st,stm32-pwm-lp".
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- #pwm-cells: Should be set to 3. This PWM chip uses the default 3 cells
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bindings defined in pwm.yaml.
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Optional properties:
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- pinctrl-names: Set to "default". An additional "sleep" state can be
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defined to set pins in sleep state when in low power.
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- pinctrl-n: Phandle(s) pointing to pin configuration node for PWM,
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respectively for "default" and "sleep" states.
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Example:
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timer@40002400 {
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compatible = "st,stm32-lptimer";
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...
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pwm {
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compatible = "st,stm32-pwm-lp";
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#pwm-cells = <3>;
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pinctrl-names = "default", "sleep";
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pinctrl-0 = <&lppwm1_pins>;
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pinctrl-1 = <&lppwm1_sleep_pins>;
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};
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};
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