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backlight: qcom-wled: Add new properties for PMI8998

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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>
This commit is contained in:
Kiran Gunda 2019-11-01 11:56:59 +05:30 committed by Lee Jones
parent 488a92e688
commit 059dcfcb4a
1 changed files with 63 additions and 11 deletions
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74
Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
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@ -20,7 +20,7 @@ platforms. The PMIC is connected to the host processor via SPMI bus.
- default-brightness
Usage: optional
Value type: <u32>
Definition: brightness value on boot, value from: 0-4095
Definition: brightness value on boot, value from: 0-4095.
Default: 2048
- label
@ -48,20 +48,24 @@ platforms. The PMIC is connected to the host processor via SPMI bus.
- qcom,current-limit
Usage: optional
Value type: <u32>
Definition: mA; per-string current limit
value: For pm8941: from 0 to 25 with 5 mA step
Default 20 mA.
For pmi8998: from 0 to 30 with 5 mA step
Default 25 mA.
Definition: mA; per-string current limit; value from 0 to 25 with
1 mA step. Default 20 mA.
This property is supported only for pm8941.
- qcom,current-limit-microamp
Usage: optional
Value type: <u32>
Definition: uA; per-string current limit; value from 0 to 30000 with
2500 uA step. Default 25 mA.
- qcom,current-boost-limit
Usage: optional
Value type: <u32>
Definition: mA; boost current limit.
For pm8941: one of: 105, 385, 525, 805, 980, 1260, 1400,
1680. Default: 805 mA
1680. Default: 805 mA.
For pmi8998: one of: 105, 280, 450, 620, 970, 1150, 1300,
1500. Default: 970 mA
1500. Default: 970 mA.
- qcom,switching-freq
Usage: optional
@ -76,15 +80,62 @@ platforms. The PMIC is connected to the host processor via SPMI bus.
Usage: optional
Value type: <u32>
Definition: V; Over-voltage protection limit; one of:
27, 29, 32, 35. default: 29V
27, 29, 32, 35. Default: 29V
This property is supported only for PM8941.
- qcom,ovp-millivolt
Usage: optional
Value type: <u32>
Definition: mV; Over-voltage protection limit;
For pmi8998: one of 18100, 19600, 29600, 31100.
Default 29600 mV.
If this property is not specified for PM8941, it
falls back to "qcom,ovp" property.
- qcom,num-strings
Usage: optional
Value type: <u32>
Definition: #; number of led strings attached;
value from 1 to 3. default: 2
This property is supported only for PM8941.
value: For PM8941 from 1 to 3. Default: 2
For PMI8998 from 1 to 4.
- interrupts
Usage: optional
Value type: <prop encoded array>
Definition: Interrupts associated with WLED. This should be
"short" and "ovp" interrupts. Interrupts can be
specified as per the encoding listed under
Documentation/devicetree/bindings/spmi/
qcom,spmi-pmic-arb.txt.
- interrupt-names
Usage: optional
Value type: <string>
Definition: Interrupt names associated with the interrupts.
Must be "short" and "ovp". The short circuit detection
is not supported for PM8941.
- qcom,enabled-strings
Usage: optional
Value tyoe: <u32 array>
Definition: Array of the WLED strings numbered from 0 to 3. Each
string of leds are operated individually. Specify the
list of strings used by the device. Any combination of
led strings can be used.
- qcom,external-pfet
Usage: optional
Value type: <bool>
Definition: Specify if external PFET control for short circuit
protection is used. This property is supported only
for PMI8998.
- qcom,auto-string-detection
Usage: optional
Value type: <bool>
Definition: Enables auto-detection of the WLED string configuration.
This feature is not supported for PM8941.
Example:
@ -99,4 +150,5 @@ pm8941-wled@d800 {
qcom,switching-freq = <1600>;
qcom,ovp = <29>;
qcom,num-strings = <2>;
qcom,enabled-strings = <0 1>;
};