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Message-Id: <1535106467-17843-4-git-send-email-kgunda@codeaurora.org>
Date: Fri, 24 Aug 2018 15:57:42 +0530
From: Kiran Gunda <kgunda@...eaurora.org>
To: bjorn.andersson@...aro.org, jingoohan1@...il.com,
lee.jones@...aro.org, b.zolnierkie@...sung.com,
dri-devel@...ts.freedesktop.org, daniel.thompson@...aro.org,
jacek.anaszewski@...il.com, pavel@....cz, robh+dt@...nel.org,
mark.rutland@....com, linux-leds@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: linux-arm-msm@...r.kernel.org, Kiran Gunda <kgunda@...eaurora.org>
Subject: [PATCH V5 3/8] backlight: qcom-wled: Add new properties for PMI8998
Update the bindings with the new properties used for
PMI8998.
Signed-off-by: Kiran Gunda <kgunda@...eaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Acked-by: Daniel Thompson <daniel.thompson@...aro.org>
---
Changes from V3:
- Removed the default values.
- Removed pmi8998 example.
Changes from V4:
- modified qcom,enabled-strings property with decimal numbers.
.../bindings/leds/backlight/qcom-wled.txt | 76 ++++++++++++++++++----
1 file changed, 62 insertions(+), 14 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
index 14f28f2..9d840d5 100644
--- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
+++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
@@ -20,8 +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
- Default: 2048
+ Definition: brightness value on boot, value from: 0-4095.
- label
Usage: required
@@ -48,20 +47,24 @@ 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.
+ 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.
- 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.
For pmi8998: one of: 105, 280, 450, 620, 970, 1150, 1300,
- 1500. Default: 970 mA
+ 1500.
- qcom,switching-freq
Usage: optional
@@ -69,22 +72,66 @@ platforms. The PMIC is connected to the host processor via SPMI bus.
Definition: kHz; switching frequency; one of: 600, 640, 685, 738,
800, 872, 960, 1066, 1200, 1371, 1600, 1920, 2400, 3200,
4800, 9600.
- Default: for pm8941: 1600 kHz
- for pmi8998: 800 kHz
- qcom,ovp
Usage: optional
Value type: <u32>
Definition: V; Over-voltage protection limit; one of:
- 27, 29, 32, 35. default: 29V
+ 27, 29, 32, 35.
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
+ 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.
+ 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 +146,5 @@ pm8941-wled@...0 {
qcom,switching-freq = <1600>;
qcom,ovp = <29>;
qcom,num-strings = <2>;
+ qcom,enabled-strings = <0 1>;
};
--
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