[PATCH 2/2] dt-bindings: leds: lp855x: Convert to json-schema
Rob Herring
robh at kernel.org
Tue Dec 21 19:41:19 UTC 2021
On Fri, Dec 17, 2021 at 06:07:15PM +0100, Thierry Reding wrote:
> From: Thierry Reding <treding at nvidia.com>
>
> Convert the Texas Instruments LP855x backlight device tree bindings from
> the free-form text format to json-schema.
>
> Signed-off-by: Thierry Reding <treding at nvidia.com>
> ---
> .../bindings/leds/backlight/lp855x.txt | 72 ---------
> .../bindings/leds/backlight/ti,lp8550.yaml | 151 ++++++++++++++++++
> 2 files changed, 151 insertions(+), 72 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/leds/backlight/lp855x.txt
> create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti,lp8550.yaml
>
> diff --git a/Documentation/devicetree/bindings/leds/backlight/lp855x.txt b/Documentation/devicetree/bindings/leds/backlight/lp855x.txt
> deleted file mode 100644
> index 88f56641fc28..000000000000
> --- a/Documentation/devicetree/bindings/leds/backlight/lp855x.txt
> +++ /dev/null
> @@ -1,72 +0,0 @@
> -lp855x bindings
> -
> -Required properties:
> - - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
> - "ti,lp8555", "ti,lp8556", "ti,lp8557"
> - - reg: I2C slave address (u8)
> - - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device.
> -
> -Optional properties:
> - - bl-name: Backlight device name (string)
> - - init-brt: Initial value of backlight brightness (u8)
> - - pwm-period: PWM period value. Set only PWM input mode used (u32)
> - - rom-addr: Register address of ROM area to be updated (u8)
> - - rom-val: Register value to be updated (u8)
> - - power-supply: Regulator which controls the 3V rail
> - - enable-supply: Regulator which controls the EN/VDDIO input
> -
> -Example:
> -
> - /* LP8555 */
> - backlight at 2c {
> - compatible = "ti,lp8555";
> - reg = <0x2c>;
> -
> - dev-ctrl = /bits/ 8 <0x00>;
> - pwm-period = <10000>;
> -
> - /* 4V OV, 4 output LED0 string enabled */
> - rom_14h {
> - rom-addr = /bits/ 8 <0x14>;
> - rom-val = /bits/ 8 <0xcf>;
> - };
> -
> - /* Heavy smoothing, 24ms ramp time step */
> - rom_15h {
> - rom-addr = /bits/ 8 <0x15>;
> - rom-val = /bits/ 8 <0xc7>;
> - };
> -
> - /* 4 output LED1 string enabled */
> - rom_19h {
> - rom-addr = /bits/ 8 <0x19>;
> - rom-val = /bits/ 8 <0x0f>;
> - };
> - };
> -
> - /* LP8556 */
> - backlight at 2c {
> - compatible = "ti,lp8556";
> - reg = <0x2c>;
> -
> - bl-name = "lcd-bl";
> - dev-ctrl = /bits/ 8 <0x85>;
> - init-brt = /bits/ 8 <0x10>;
> - };
> -
> - /* LP8557 */
> - backlight at 2c {
> - compatible = "ti,lp8557";
> - reg = <0x2c>;
> - enable-supply = <&backlight_vddio>;
> - power-supply = <&backlight_vdd>;
> -
> - dev-ctrl = /bits/ 8 <0x41>;
> - init-brt = /bits/ 8 <0x0a>;
> -
> - /* 4V OV, 4 output LED string enabled */
> - rom_14h {
> - rom-addr = /bits/ 8 <0x14>;
> - rom-val = /bits/ 8 <0xcf>;
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,lp8550.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,lp8550.yaml
> new file mode 100644
> index 000000000000..412779a5462b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/backlight/ti,lp8550.yaml
> @@ -0,0 +1,151 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/backlight/ti,lp8550.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments LP855x family devicetree bindings
> +
> +maintainers:
> + - Milo Kim <milo.kim at ti.com>
> + - Rob Herring <robh+dt at kernel.org>
I don't know anything about this h/w.
> +
> +properties:
> + compatible:
> + enum:
> + - ti,lp8550
> + - ti,lp8551
> + - ti,lp8552
> + - ti,lp8553
> + - ti,lp8555
> + - ti,lp8556
> + - ti,lp8557
> +
> + reg:
> + maxItems: 1
> +
> + dev-ctrl:
> + $ref: /schemas/types.yaml#/definitions/uint8
> + description: Value of DEVICE CONTROL register. It depends on the device.
> +
> + bl-name:
> + $ref: /schemas/types.yaml#/definitions/string
> + description: Backlight device name
> +
> + init-brt:
> + $ref: /schemas/types.yaml#/definitions/uint8
> + description: Initial value of backlight brightness
> +
> + pwm-period:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: PWM period value. Set only PWM input mode used
> +
> + pwm-names:
> + maxItems: 1
> +
> + pwms:
> + maxItems: 1
> +
> + power-supply:
> + description: Regulator which controls the 3V rail
> +
> + enable-supply:
> + description: Regulator which controls the EN/VDDIO input
> +
> +patternProperties:
> + '^rom_[0-9a-f]{2}h$':
> + type: object
> + properties:
> + rom-addr:
> + $ref: /schemas/types.yaml#/definitions/uint8
> + description: Register address of ROM area to be updated
> +
> + rom-val:
> + $ref: /schemas/types.yaml#/definitions/uint8
> + description: Register value to be updated
> +
> + additionalProperties: false
> +
> + required:
> + - rom-addr
> + - rom-val
> +
> +additionalProperties: false
> +
> +required:
> + - compatible
> + - reg
> + - dev-ctrl
> +
> +examples:
> + # LP8555
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + backlight at 2c {
> + compatible = "ti,lp8555";
> + reg = <0x2c>;
> +
> + dev-ctrl = /bits/ 8 <0x00>;
> + pwm-period = <10000>;
> +
> + /* 4V OV, 4 output LED0 string enabled */
> + rom_14h {
> + rom-addr = /bits/ 8 <0x14>;
> + rom-val = /bits/ 8 <0xcf>;
> + };
> +
> + /* Heavy smoothing, 24ms ramp time step */
> + rom_15h {
> + rom-addr = /bits/ 8 <0x15>;
> + rom-val = /bits/ 8 <0xc7>;
> + };
> +
> + /* 4 output LED1 string enabled */
> + rom_19h {
> + rom-addr = /bits/ 8 <0x19>;
> + rom-val = /bits/ 8 <0x0f>;
> + };
> + };
> + };
> +
> + # LP8556
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + backlight at 2c {
> + compatible = "ti,lp8556";
> + reg = <0x2c>;
> +
> + bl-name = "lcd-bl";
> + dev-ctrl = /bits/ 8 <0x85>;
> + init-brt = /bits/ 8 <0x10>;
> + };
> + };
> +
> + # LP8557
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + backlight at 2c {
> + compatible = "ti,lp8557";
> + reg = <0x2c>;
> + enable-supply = <&backlight_vddio>;
> + power-supply = <&backlight_vdd>;
> +
> + dev-ctrl = /bits/ 8 <0x41>;
> + init-brt = /bits/ 8 <0x0a>;
> +
> + /* 4V OV, 4 output LED string enabled */
> + rom_14h {
> + rom-addr = /bits/ 8 <0x14>;
> + rom-val = /bits/ 8 <0xcf>;
> + };
> + };
> + };
> --
> 2.34.1
>
>
More information about the dri-devel
mailing list