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SubjectRe: [PATCHv4 09/10] dt-bindings: mfd: ti-lmu: update for backlight
On Fri, Mar 30, 2018 at 07:24:13PM +0200, Sebastian Reichel wrote:
> Update binding to integrate the backlight feature directly into
> the main node, as suggested by Rob Herring.
>
> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
> ---
> Documentation/devicetree/bindings/mfd/ti-lmu.txt | 119 ++++++++++++-----------
> 1 file changed, 60 insertions(+), 59 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/mfd/ti-lmu.txt b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
> index c885cf89b8ce..b3433e95dfa5 100644
> --- a/Documentation/devicetree/bindings/mfd/ti-lmu.txt
> +++ b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
> @@ -28,10 +28,9 @@ Required properties:
>
> Optional property:
> - enable-gpios: A GPIO specifier for hardware enable pin.
> -
> -Required node:
> - - backlight: All LMU devices have backlight child nodes.
> - For the properties, please refer to [1].
> + - pwm-names: Should be either "lmu-backlight" or unset
> + - pwm: This should be a PWM specifier following ../pwm/pwm.txt and must
> + only be specified, if the backlight should be used in PWM mode.
>
> Optional nodes:
> - fault-monitor: Hardware fault monitoring driver for LM3633 and LM3697.
> @@ -42,8 +41,31 @@ Optional nodes:
> - leds: LED properties for LM3633. Please refer to [2].
> - regulators: Regulator properties for LM3631 and LM3632.
> Please refer to [3].
> + - bank0, bank1, bank2: This contains the backlight configuration
> + for each backlight control bank.
> +
> +Required properties in the bank subnodes:
> + - label: A string describing the backlight. Should contain "keyboard"
> + for a keyboard backlight and "lcd" for LCD panel backlights.
> + - ti,led-sources: A list of channels, that should be driven. Each channel
> + should only be driven by one bank.
> +
> +Optional properties in the bank subnodes:
> + - default-brightness-level: Backlight initial brightness value.
> + Type is <u32>. It is set as soon as backlight
> + device is created.
> + 0 ~ 2047 = LM3631, LM3632, LM3633, LM3695 and
> + LM3697
> + 0 ~ 255 = LM3532
> + - ti,ramp-up-ms, ti,ramp-down-ms: Light dimming effect properties.
> + Type is <u32>. Unit is millisecond.
> + 0 ~ 65 ms = LM3532
> + 0 ~ 4000 ms = LM3631
> + 0 ~ 16000 ms = LM3633 and LM3697
> + - pwm-period: PWM period. Only valid in PWM brightness mode.
> + Type is <u32>. If this property is missing, then control
> + mode is set to I2C by default.
>
> -[1] ../leds/backlight/ti-lmu-backlight.txt
> [2] ../leds/leds-lm3633.txt
> [3] ../regulator/lm363x-regulator.txt
>
> @@ -53,14 +75,11 @@ lm3532@38 {
>
> enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
>
> - backlight {
> - compatible = "ti,lm3532-backlight";
> -
> - lcd {
> - led-sources = <0 1 2>;
> - ramp-up-msec = <30>;
> - ramp-down-msec = <0>;
> - };
> + bank0 {
> + label = "lcd";
> + led-sources = <0 1 2>;
> + ramp-up-msec = <30>;
> + ramp-down-msec = <0>;

Looks like it was already wrong, but these are missing the vendor
prefixes.

> };
> };
>
> @@ -105,13 +124,10 @@ lm3631@29 {

Are so many examples really needed? Examples aren't supposed to
enumerate all possible options...

Rob

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