[PATCH V3 3/7] backlight: qcom-wled: Add new properties for PMI8998
From: Kiran Gunda
Date: Tue Jun 19 2018 - 07:15:09 EST
Update the bindings with the new properties used for
PMI8998.
Signed-off-by: Kiran Gunda <kgunda@xxxxxxxxxxxxxx>
---
.../bindings/leds/backlight/qcom-wled.txt | 84 ++++++++++++++++++++--
1 file changed, 77 insertions(+), 7 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
index 14f28f2..503ce87 100644
--- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
+++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
@@ -48,11 +48,15 @@ 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 25000 uA.
- qcom,current-boost-limit
Usage: optional
@@ -79,12 +83,61 @@ platforms. The PMIC is connected to the host processor via SPMI bus.
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. default: 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.
+ for pm8941: Default values are [00 01].
+ for pmi8998: Default values are [00 01 02 03].
+
+- 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 +152,21 @@ pm8941-wled@d800 {
qcom,switching-freq = <1600>;
qcom,ovp = <29>;
qcom,num-strings = <2>;
+ qcom,enabled-strings = <0x00 0x01>;
+};
+
+pmi8998-wled@d800 {
+ compatible = "qcom,pmi8998-wled";
+ reg = <0xd800 0xd900>;
+ label = "backlight";
+
+ interrupts = <3 0xd8 2 IRQ_TYPE_EDGE_RISING>,
+ <3 0xd8 1 IRQ_TYPE_EDGE_RISING>;
+ interrupt-names = "short", "ovp";
+ qcom,current-limit-microamp = <25000>;
+ qcom,current-boost-limit = <805>;
+ qcom,switching-freq = <1600>;
+ qcom,ovp-millivolt = <29600>;
+ qcom,num-strings = <4>;
+ qcom,enabled-strings = <0x00 0x01 0x02 0x03>;
};
--
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