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Date: Sat, 31 Oct 2015 10:08:01 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Bjorn Andersson <bjorn.andersson@...ymobile.com>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Johan Hovold <jhovold@...il.com>,
Kumar Gala <galak@...eaurora.org>
Cc: devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 1/3] devicetree: mfd: Add binding for the TI LM3533
On 30/10/15 23:50, Bjorn Andersson wrote:
> Add the binding for the Texas Instruments LM3533 lighting power
> solution.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
For the ALS bits. It does feel like the als resistance might become
a generic parameter in the long term, but it's not common enough to
conclude that now.
Acked-by: Jonathan Cameron <jic23@...nel.org>
> ---
>
> Changes since v2:
> - Drop vendor prefix of vendor properties
> - Specify unit of various properties
> - Fix reference paths
>
> Changes since v1:
> - Added unit to boost-freq and als-resistance (as the frequency now comes with
> a unit specifier I changed it to be expressed in kHz)
>
> Documentation/devicetree/bindings/mfd/lm3533.txt | 184 +++++++++++++++++++++++
> 1 file changed, 184 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/lm3533.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/lm3533.txt b/Documentation/devicetree/bindings/mfd/lm3533.txt
> new file mode 100644
> index 000000000000..963cee153a4d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/lm3533.txt
> @@ -0,0 +1,184 @@
> +Texas Instruments LM3533 binding
> +
> +This binding describes the Texas Instruments LM3533, a lighting power solution
> +for smartphone handsets. The common properties are described directly in the
> +node, while each individual component are described in an optional subnode.
> +
> +- compatible:
> + Usage: required
> + Value type: <stringlist>
> + Definition: must be:
> + "ti,lm3533"
> +
> +- reg:
> + Usage: required
> + Value type: <u32>
> + Definition: i2c address of the LM3533 chip
> +
> +- als-supply:
> + Usage: optional
> + Value type: <prop-encoded-array>
> + Definition: reference to regulator powering the V_als input; as
> + specified in "../regulator/regulator.txt"
> +
> +- hwen-gpios:
> + Usage: required
> + Value type: <prop-encoded-array>
> + Definition: reference to gpio pin connected to the HWEN input; as
> + specified in "../gpio/gpio.txt"
> +
> +- ti,boost-freq-hz:
> + Usage: required
> + Value type: <u32>
> + Definition: switch-frequency of the boost converter, must be either:
> + 500000 or 1000000
> +
> +- ti,boost-ovp-mv:
> + Usage: required
> + Value type: <u32>
> + Definition: over-voltage protection limit, in mV. Must be one of:
> + 16000, 24000, 32000 or 40000
> +
> +- #address-cells:
> + Usage: required
> + Value type: <u32>
> + Definition: must be 1
> +
> +- #size-cells:
> + Usage: required
> + Value type: <u32>
> + Definition: must be 0
> +
> += ALS SUBNODE
> +The ambient light sensor subnode must be named "als", it carries the light
> +sensor related properties.
> +
> +- ti,als-resistance-ohm:
> + Usage: required (unless ti,pwm-mode is specified)
> + Value type: <u32>
> + Definition: specifies the resistor value (R_als), in Ohm. Valid values
> + ranges from 200000 to 1574 Ohm.
> +
> +- ti,pwm-mode:
> + Usage: optional
> + Value type: <empty>
> + Definition: specifies, if present, that the als should operate in PWM
> + mode - rather than analog mode
> +
> += BACKLIGHT NODES
> +Backlight subnodes must be named "backlight", they carry the backlight related
> +properties.
> +
> +- reg:
> + Usage: required
> + Value type: <u32>
> + Definition: specifies which of the two backlights this node corresponds
> + to
> +
> +- default-brightness:
> + Usage: optional
> + Value type: <32>
> + Definition: specifies the default brightness for the backlight, in
> + units of brightness [0-255]
> +
> +- label:
> + Usage: required
> + Value type: <string>
> + Definition: specifies a name of this backlight
> +
> +- led-max-microamp:
> + Usage: required
> + Value type: <u32>
> + Definition: specifies the max current for this backlight, in uA, as
> + described in "../leds/common.txt"
> +
> +- ti,pwm-zones:
> + Usage: optional
> + Value type: <u32 list>
> + Definition: lists the ALS zones to be PWM controlled for this backlight,
> + the values in the list are in the range [0 - 4]
> +
> += LED NODES
> +LED subnodes must be named "led", they carry the LED related properties.
> +
> +- reg:
> + Usage: required
> + Value type: <u32>
> + Definition: specifies which of the four LEDs this node corresponds to
> +
> +- linux,default-trigger:
> + Usage: optional
> + Value type: <string>
> + Definition: specifies the default trigger for the LED, as described in
> + "../leds/common.txt"
> +
> +- label:
> + Usage: required
> + Value type: <string>
> + Definition: specifies a name of this LED, as described in
> + "../leds/common.txt"
> +
> +- led-max-microamp:
> + Usage: required
> + Value type: <u32>
> + Definition: specifies the max current for this LED, in uA, as described
> + in "../leds/common.txt"
> +
> +- ti,pwm-zones:
> + Usage: optional
> + Value type: <u32 list>
> + Definition: lists the ALS zones to be PWM controlled for this LED, the
> + values in the list are in the range [0 - 4]
> +
> += EXAMPLE
> +
> +i2c@...60000 {
> + compatible = "qcom,i2c-qup-v1.1.1";
> + ...
> +
> + lm3533@36 {
> + compatible = "ti,lm3533";
> + reg = <0x36>;
> +
> + als-supply = <&pm8921_l11>;
> + hwen-gpios = <&pm8921_gpio 26 GPIO_ACTIVE_HIGH>;
> +
> + ti,boost-freq-hz = <500000>;
> + ti,boost-ovp-mv = <24000>;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + als {
> + ti,als-resistance-ohm = <200000>;
> + };
> +
> + backlight@0 {
> + reg = <0>;
> + label = "backlight";
> +
> + led-max-microamp = <20200>;
> + };
> +
> + led@0 {
> + reg = <0>;
> + label = "red";
> +
> + led-max-microamp = <5000>;
> + };
> +
> + led@1 {
> + reg = <1>;
> + label = "green";
> +
> + led-max-microamp = <5000>;
> + };
> +
> + led@2 {
> + reg = <2>;
> + label = "blue";
> +
> + led-max-microamp = <5000>;
> + };
> + };
> +
>
--
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