059dcfcb4a
Update the bindings with the new properties used for PMI8998. Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
155 lines
4.4 KiB
Plaintext
155 lines
4.4 KiB
Plaintext
Binding for Qualcomm Technologies, Inc. WLED driver
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WLED (White Light Emitting Diode) driver is used for controlling display
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backlight that is part of PMIC on Qualcomm Technologies, Inc. reference
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platforms. The PMIC is connected to the host processor via SPMI bus.
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- compatible
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Usage: required
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Value type: <string>
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Definition: should be one of:
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"qcom,pm8941-wled"
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"qcom,pmi8998-wled"
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"qcom,pm660l-wled"
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- reg
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Usage: required
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Value type: <prop encoded array>
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Definition: Base address of the WLED modules.
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- default-brightness
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Usage: optional
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Value type: <u32>
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Definition: brightness value on boot, value from: 0-4095.
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Default: 2048
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- label
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Usage: required
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Value type: <string>
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Definition: The name of the backlight device
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- qcom,cs-out
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Usage: optional
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Value type: <bool>
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Definition: enable current sink output.
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This property is supported only for PM8941.
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- qcom,cabc
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Usage: optional
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Value type: <bool>
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Definition: enable content adaptive backlight control.
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- qcom,ext-gen
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Usage: optional
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Value type: <bool>
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Definition: use externally generated modulator signal to dim.
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This property is supported only for PM8941.
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- qcom,current-limit
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Usage: optional
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Value type: <u32>
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Definition: mA; per-string current limit; value from 0 to 25 with
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1 mA step. Default 20 mA.
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This property is supported only for pm8941.
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- qcom,current-limit-microamp
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Usage: optional
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Value type: <u32>
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Definition: uA; per-string current limit; value from 0 to 30000 with
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2500 uA step. Default 25 mA.
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- qcom,current-boost-limit
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Usage: optional
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Value type: <u32>
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Definition: mA; boost current limit.
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For pm8941: one of: 105, 385, 525, 805, 980, 1260, 1400,
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1680. Default: 805 mA.
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For pmi8998: one of: 105, 280, 450, 620, 970, 1150, 1300,
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1500. Default: 970 mA.
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- qcom,switching-freq
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Usage: optional
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Value type: <u32>
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Definition: kHz; switching frequency; one of: 600, 640, 685, 738,
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800, 872, 960, 1066, 1200, 1371, 1600, 1920, 2400, 3200,
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4800, 9600.
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Default: for pm8941: 1600 kHz
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for pmi8998: 800 kHz
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- qcom,ovp
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Usage: optional
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Value type: <u32>
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Definition: V; Over-voltage protection limit; one of:
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27, 29, 32, 35. Default: 29V
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This property is supported only for PM8941.
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- qcom,ovp-millivolt
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Usage: optional
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Value type: <u32>
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Definition: mV; Over-voltage protection limit;
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For pmi8998: one of 18100, 19600, 29600, 31100.
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Default 29600 mV.
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If this property is not specified for PM8941, it
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falls back to "qcom,ovp" property.
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- qcom,num-strings
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Usage: optional
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Value type: <u32>
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Definition: #; number of led strings attached;
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value: For PM8941 from 1 to 3. Default: 2
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For PMI8998 from 1 to 4.
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- interrupts
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Usage: optional
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Value type: <prop encoded array>
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Definition: Interrupts associated with WLED. This should be
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"short" and "ovp" interrupts. Interrupts can be
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specified as per the encoding listed under
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Documentation/devicetree/bindings/spmi/
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qcom,spmi-pmic-arb.txt.
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- interrupt-names
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Usage: optional
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Value type: <string>
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Definition: Interrupt names associated with the interrupts.
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Must be "short" and "ovp". The short circuit detection
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is not supported for PM8941.
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- qcom,enabled-strings
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Usage: optional
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Value tyoe: <u32 array>
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Definition: Array of the WLED strings numbered from 0 to 3. Each
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string of leds are operated individually. Specify the
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list of strings used by the device. Any combination of
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led strings can be used.
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- qcom,external-pfet
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Usage: optional
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Value type: <bool>
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Definition: Specify if external PFET control for short circuit
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protection is used. This property is supported only
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for PMI8998.
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- qcom,auto-string-detection
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Usage: optional
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Value type: <bool>
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Definition: Enables auto-detection of the WLED string configuration.
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This feature is not supported for PM8941.
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Example:
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pm8941-wled@d800 {
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compatible = "qcom,pm8941-wled";
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reg = <0xd800>;
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label = "backlight";
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qcom,cs-out;
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qcom,current-limit = <20>;
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qcom,current-boost-limit = <805>;
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qcom,switching-freq = <1600>;
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qcom,ovp = <29>;
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qcom,num-strings = <2>;
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qcom,enabled-strings = <0 1>;
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};
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