Re: [PATCH RESEND 01/16] Documentation: dt-bindings: mfd: add TI LMU device binding information

From: Lee Jones
Date: Wed Nov 11 2015 - 04:49:41 EST

On Mon, 02 Nov 2015, Milo Kim wrote:

> This patch describes overall binding for TI LMU MFD devices.
>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Signed-off-by: Milo Kim <milo.kim@xxxxxx>
> ---
> Documentation/devicetree/bindings/mfd/ti-lmu.txt | 282 +++++++++++++++++++++++
> 1 file changed, 282 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/ti-lmu.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/ti-lmu.txt b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
> new file mode 100644
> index 0000000..7ccf07e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
> @@ -0,0 +1,282 @@
> +TI LMU(Lighting Management Unit) device tree bindings

' ' here -^

> +TI LMU driver supports lighting devices belows.

s/belows./below:/

> + Name Child nodes
> + ------ -------------------------
> + LM3532 Backlight
> + LM3631 Backlight and regulator
> + LM3632 Backlight and regulator
> + LM3633 Backlight, LED and HWMON
> + LM3695 Backlight
> + LM3697 Backlight and HWMON
> +
> +Required properties:
> + - compatible: Should be one of lists below.

s/ lists below./:/

> + "ti,lm3532"
> + "ti,lm3631"
> + "ti,lm3632"
> + "ti,lm3633"
> + "ti,lm3695"
> + "ti,lm3697"
> + - reg: I2C slave address.
> + 0x11 is LM3632
> + 0x29 is LM3631
> + 0x36 is LM3633, LM3697
> + 0x38 is LM3532
> + 0x63 is LM3695

s/is/for/

> +Optional properties:
> + - 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].
> +
> +Optional nodes:
> + - hwmon: Hardware fault monitoring driver for LM3633 and LM3697.
> + For the property, please refer to [2].
> + - leds: LED properties for LM3633. Please refer to [3].
> + - regulators: Regulator properties for LM3631 and LM3632.
> + Please refer to [4].
> +
> +[1] Documentation/devicetree/bindings/video/backlight/ti-lmu-backlight.txt
> +[2] Documentation/devicetree/bindings/hwm/ti-lmu-hwmon.txt
> +[3] Documentation/devicetree/bindings/leds/leds-lm3633.txt
> +[4] Documentation/devicetree/bindings/regulator/lm363x-regulator.txt

s/Documentation/devicetree/bindings/../

> +Examples:

These aren't examples, they're actual DT entries.

Please trim them down to just one, fully enabled node, only to be used
as an 'example'.

> +LM3532 has a backlight device. External GPIO is used for enabling LM3532.
> +
> +lm3532@38 {
> + compatible = "ti,lm3532";
> + reg = <0x38>;
> +
> + enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
> +
> + backlight {
> + compatible = "ti,lm3532-backlight";
> +
> + lcd {
> + hvled1-used;
> + hvled2-used;
> + hvled3-used;
> +
> + ramp-up-msec = <30>;
> + ramp-down-msec = <0>;
> +
> + backlight-max-microamp = <5000>;
> + };
> + };
> +};
> +
> +LM3631 has 5 regulators with one backlight device.
> +
> +lm3631@29 {
> + compatible = "ti,lm3631";
> + reg = <0x29>;
> +
> + regulators {
> + compatible = "ti,lm363x-regulator";
> +
> + vboost {
> + regulator-name = "lcd_boost";
> + regulator-min-microvolt = <4500000>;
> + regulator-max-microvolt = <6350000>;
> + regulator-always-on;
> + };
> +
> + vcont {
> + regulator-name = "lcd_vcont";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <3300000>;
> + };
> +
> + voref {
> + regulator-name = "lcd_voref";
> + regulator-min-microvolt = <4000000>;
> + regulator-max-microvolt = <6000000>;
> + };
> +
> + vpos {
> + regulator-name = "lcd_vpos";
> + regulator-min-microvolt = <4000000>;
> + regulator-max-microvolt = <6000000>;
> + regulator-boot-on;
> + };
> +
> + vneg {
> + regulator-name = "lcd_vneg";
> + regulator-min-microvolt = <4000000>;
> + regulator-max-microvolt = <6000000>;
> + regulator-boot-on;
> + };
> + };
> +
> + backlight {
> + compatible = "ti,lm3631-backlight";
> +
> + lcd {
> + backlight-name = "lcd_bl";
> + hvled1-used;
> + hvled2-used;
> +
> + ramp-up-msec = <300>;
> + };
> + };
> +};
> +
> +LM3632 has 3 regulators with one backlight device. External GPIO is
> +used for enabling LM3632.
> +
> +lm3632@11 {
> + compatible = "ti,lm3632";
> + reg = <0x11>;
> +
> + enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
> +
> + regulators {
> + compatible = "ti,lm363x-regulator";
> +
> + ti,lcm-en1-gpio = <&pioC 0 GPIO_ACTIVE_HIGH>;
> + ti,lcm-en2-gpio = <&pioC 1 GPIO_ACTIVE_HIGH>;
> +
> + vboost {
> + regulator-name = "lcd_boost";
> + regulator-min-microvolt = <4500000>;
> + regulator-max-microvolt = <6400000>;
> + regulator-always-on;
> + };
> +
> + vpos {
> + regulator-name = "lcd_vpos";
> + regulator-min-microvolt = <4000000>;
> + regulator-max-microvolt = <6000000>;
> + };
> +
> + vneg {
> + regulator-name = "lcd_vneg";
> + regulator-min-microvolt = <4000000>;
> + regulator-max-microvolt = <6000000>;
> + };
> + };
> +
> + backlight {
> + compatible = "ti,lm3632-backlight";
> +
> + lcd {
> + backlight-name = "lcd";
> + hvled1-used;
> + hvled2-used;
> + };
> + };
> +};
> +
> +LM3633 has multiple backlight channels, LED channels and hardware fault
> +monitoring driver. External GPIO is used for enabling LM3633.
> +
> +lm3633@36 {
> + compatible = "ti,lm3633";
> + reg = <0x36>;
> +
> + enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
> +
> + backlight {
> + compatible = "ti,lm3633-backlight";
> +
> + pwms = <&pwm0 0 10000 0>; /* pwm number, period, polarity */
> + pwm-names = "lmu-backlight";
> +
> + main {
> + backlight-name = "main_lcd";
> + hvled2-used;
> + hvled3-used;
> + backlight-max-microamp = <20000>;
> +
> + ramp-up-msec = <500>;
> + ramp-down-msec = <500>;
> + };
> +
> + front {
> + backlight-name = "front_lcd";
> + hvled1-used;
> +
> + ramp-up-msec = <1000>;
> + ramp-down-msec = <0>;
> +
> + pwm-period = <10000>;
> + };
> + };
> +
> + leds {
> + compatible = "ti,lm3633-leds";
> +
> + chan2 {
> + channel-name = "status";
> + lvled2-used;
> + led-max-microamp = <6000>;
> + };
> +
> + chan456 {
> + channel-name = "rgb";
> + lvled4-used;
> + lvled5-used;
> + lvled6-used;
> + };
> + };
> +
> + hwmon {
> + compatible = "ti,lm3633-hwmon";
> + };
> +};
> +
> +LM3695 is single backlight device.
> +
> +lm3695@63 {
> + compatible = "ti,lm3695";
> + reg = <0x63>;
> +
> + backlight {
> + compatible = "ti,lm3695-backlight";
> +
> + lcd {
> + hvled1-used;
> + hvled2-used;
> + backlight-max-microamp = <20000>;
> + };
> + };
> +};
> +
> +LM3697 has one backlight device and hardware fault monitoring driver.
> +External GPIO is used for enabling LM3697.
> +
> +lm3697@36 {
> + compatible = "ti,lm3697";
> + reg = <0x36>;
> +
> + enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
> +
> + backlight {
> + compatible = "ti,lm3697-backlight";
> +
> + pwms = <&pwm0 0 10000 0>; /* pwm number, period, polarity */
> + pwm-names = "lmu-backlight";
> +
> + lcd {
> + backlight-name = "bl";
> + hvled1-used;
> + hvled2-used;
> + hvled3-used;
> + backlight-max-microamp = <20000>;
> +
> + ramp-up-msec = <500>;
> + ramp-down-msec = <500>;
> + pwm-period = <10000>;
> + };
> + };
> +
> + hwmon {
> + compatible = "ti,lm3697-hwmon";
> + };
> +};

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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