Convert device tree bindings for Atmel's HLCDC PWM controller to YAML format. Signed-off-by: Dharma Balasubiramani <dharma.b@xxxxxxxxxxxxx> Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> --- changelog v3 -> v4 - No changes Note: The clean up patch will be sent later as Sam suggested. v2 -> v3 - Remove '|' in description, as there is no formatting to preserve. - Delete the description for pwm-cells. - Drop the label for pwm node as it not used. v1 -> v2 - Remove the explicit copyrights. - Modify title (not include words like binding/driver). - Modify description actually describing the hardware and not the driver. - Remove pinctrl properties which aren't required. - Drop parent node and it's other sub-device node which are not related here. --- .../bindings/pwm/atmel,hlcdc-pwm.yaml | 44 +++++++++++++++++++ .../bindings/pwm/atmel-hlcdc-pwm.txt | 29 ------------ 2 files changed, 44 insertions(+), 29 deletions(-) create mode 100644 Documentation/devicetree/bindings/pwm/atmel,hlcdc-pwm.yaml delete mode 100644 Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt diff --git a/Documentation/devicetree/bindings/pwm/atmel,hlcdc-pwm.yaml b/Documentation/devicetree/bindings/pwm/atmel,hlcdc-pwm.yaml new file mode 100644 index 000000000000..4f4cc21fe4f7 --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/atmel,hlcdc-pwm.yaml @@ -0,0 +1,44 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pwm/atmel,hlcdc-pwm.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Atmel's HLCDC's PWM controller + +maintainers: + - Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx> + - Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> + - Claudiu Beznea <claudiu.beznea@xxxxxxxxx> + +description: + The LCDC integrates a Pulse Width Modulation (PWM) Controller. This block + generates the LCD contrast control signal (LCD_PWM) that controls the + display's contrast by software. LCDC_PWM is an 8-bit PWM signal that can be + converted to an analog voltage with a simple passive filter. LCD display + panels have different backlight specifications in terms of minimum/maximum + values for PWM frequency. If the LCDC PWM frequency range does not match the + LCD display panel, it is possible to use the standalone PWM Controller to + drive the backlight. + +properties: + compatible: + const: atmel,hlcdc-pwm + + "#pwm-cells": + const: 3 + +required: + - compatible + - "#pwm-cells" + +additionalProperties: false + +examples: + - | + pwm { + compatible = "atmel,hlcdc-pwm"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_lcd_pwm>; + #pwm-cells = <3>; + }; diff --git a/Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt b/Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt deleted file mode 100644 index afa501bf7f94..000000000000 --- a/Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt +++ /dev/null @@ -1,29 +0,0 @@ -Device-Tree bindings for Atmel's HLCDC (High-end LCD Controller) PWM driver - -The Atmel HLCDC PWM is subdevice of the HLCDC MFD device. -See ../mfd/atmel-hlcdc.txt for more details. - -Required properties: - - compatible: value should be one of the following: - "atmel,hlcdc-pwm" - - pinctr-names: the pin control state names. Should contain "default". - - pinctrl-0: should contain the pinctrl states described by pinctrl - default. - - #pwm-cells: should be set to 3. This PWM chip use the default 3 cells - bindings defined in pwm.yaml in this directory. - -Example: - - hlcdc: hlcdc@f0030000 { - compatible = "atmel,sama5d3-hlcdc"; - reg = <0xf0030000 0x2000>; - clocks = <&lcdc_clk>, <&lcdck>, <&clk32k>; - clock-names = "periph_clk","sys_clk", "slow_clk"; - - hlcdc_pwm: hlcdc-pwm { - compatible = "atmel,hlcdc-pwm"; - pinctrl-names = "default"; - pinctrl-0 = <&pinctrl_lcd_pwm>; - #pwm-cells = <3>; - }; - }; -- 2.25.1
