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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 17/01/24 1:40 am, Alexandre Belloni wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On 16/01/2024 18:03:19+0000, Conor Dooley wrote: >> On Tue, Jan 16, 2024 at 05:07:59PM +0530, Dharma Balasubiramani wrote: >>> Convert device tree bindings for Atmel's HLCDC PWM controller to YAML >>> format. >>> >>> Signed-off-by: Dharma Balasubiramani >>> --- >>> changelog >>> 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 | 47 +++++++++++++++++++ >>> .../bindings/pwm/atmel-hlcdc-pwm.txt | 29 ------------ >>> 2 files changed, 47 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..751122309fa9 >>> --- /dev/null >>> +++ b/Documentation/devicetree/bindings/pwm/atmel,hlcdc-pwm.yaml >>> @@ -0,0 +1,47 @@ >>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> >> The original file has no license, but was originally written by a >> free-electrons employee, so the relicensing here is fine. >> > > I confirm relicensing is fine, even assigning the copyright to > Microchip (note that Bootlin is legally the same entity as > free-electrons) Thanks Conor and Alexandre. I will add the copyrights back in v3. > >>> +%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 >>> + - Alexandre Belloni >>> + - Claudiu Beznea >>> + >>> +description: | >> >> Again, the | is not needed here. Sure, I will drop it. >> >>> + 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 >>> + description: | >>> + This PWM chip uses the default 3 cells bindings defined in pwm.yaml in >>> + this directory. >> >> I would delete this description tbh. Sure, I will remove it. >> >>> + >>> +required: >>> + - compatible >>> + - "#pwm-cells" >>> + >>> +additionalProperties: false >>> + >>> +examples: >>> + - | >>> + pwm: pwm { >>> + compatible = "atmel,hlcdc-pwm"; >>> + pinctrl-names = "default"; >>> + pinctrl-0 = <&pinctrl_lcd_pwm>; >>> + #pwm-cells = <3>; >>> + }; >> >> The label here is not used and can be dropped. Otherwise, >> Reviewed-by: Conor Dooley Sure, I will remove the label. -- With Best Regards, Dharma B. >> >> >> Cheers, >> Conor. >> >>> 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 >>> > > > > -- > Alexandre Belloni, co-owner and COO, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel