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Message-ID: <ac8f25113a3bb233c11fd7cd9e62c2cf@codeaurora.org>
Date: Fri, 03 Apr 2020 16:45:49 +0530
From: kgunda@...eaurora.org
To: Rob Herring <robh@...nel.org>
Cc: 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, mark.rutland@....com,
linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Dan Murphy <dmurphy@...com>,
linux-arm-msm@...r.kernel.org,
Subbaraman Narayanamurthy <subbaram@...eaurora.org>
Subject: Re: [PATCH V4 1/4] backlight: qcom-wled: convert the wled bindings to
.yaml format
On 2020-03-31 23:24, Rob Herring wrote:
> On Mon, Mar 23, 2020 at 11:16:55PM +0530, Kiran Gunda wrote:
>> Convert the qcom-wled bindings from .txt to .yaml format.
>>
>> Signed-off-by: Kiran Gunda <kgunda@...eaurora.org>
>> Signed-off-by: Subbaraman Narayanamurthy <subbaram@...eaurora.org>
>> Acked-by: Daniel Thompson <daniel.thompson@...aro.org>
>> ---
>> .../bindings/leds/backlight/qcom-wled.txt | 154
>> -----------------
>> .../bindings/leds/backlight/qcom-wled.yaml | 184
>> +++++++++++++++++++++
>> 2 files changed, 184 insertions(+), 154 deletions(-)
>> delete mode 100644
>> Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
>> create mode 100644
>> Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
>
>> diff --git
>> a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
>> b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
>> new file mode 100644
>> index 0000000..8a388bf
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
>> @@ -0,0 +1,184 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/leds/backlight/qcom-wled.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Binding for Qualcomm Technologies, Inc. WLED driver
>> +
>> +maintainers:
>> + - Lee Jones <lee.jones@...aro.org>
>
> Should be the h/w owner (you), not who applies patches.
>
will address in next post.
>> +
>> +description: |
>> + WLED (White Light Emitting Diode) driver is used for controlling
>> display
>> + backlight that is part of PMIC on Qualcomm Technologies, Inc.
>> reference
>> + platforms. The PMIC is connected to the host processor via SPMI
>> bus.
>> +
>> +properties:
>> + compatible :
>
> Drop the space ^
>
will address in next post.
>> + enum:
>> + - qcom,pm8941-wled
>> + - qcom,pmi8998-wled
>> + - qcom,pm660l-wled
>
> Wrong indent (1 space too many).
>
will address in next post.
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + default-brightness:
>> + maxItems: 1
>
> maxItems is for arrays and this is a single scalar.
>
>> + description:
>> + brightness value on boot, value from 0-4095.
>
> 0-4095 sounds like a constraint.
>
will address in next post.
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>
> There should be a common definition for this.
>
will address in next post.
>> + default: 2048
>> +
>> + label:
>> + maxItems: 1
>> + description:
>> + The name of the backlight device.
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/string
>
> Already has a type. Just 'label: true' is enough.
>
will address in next post.
>> +
>> + qcom,cs-out:
>> + description:
>> + enable current sink output.
>> + This property is supported only for PM8941.
>> + type: boolean
>> +
>> + qcom,cabc:
>> + description:
>> + enable content adaptive backlight control.
>> + type: boolean
>> +
>> + qcom,ext-gen:
>> + description:
>> + use externally generated modulator signal to dim.
>> + This property is supported only for PM8941.
>> + type: boolean
>> +
>> + qcom,current-limit:
>> + maxItems: 1
>
> Not an array.
>
will address in next post.
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + mA; per-string current limit; value from 0 to 25 with
>
> 25 sounds like a constraint.
>
will address in next post.
>> + 1 mA step. This property is supported only for pm8941.
>> + default: 20
>> +
>> + qcom,current-limit-microamp:
>> + maxItems: 1
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>
> properties with unit suffix already have a type.
>
will address in next post.
>> + description:
>> + uA; per-string current limit; value from 0 to 30000 with
>> + 2500 uA step.
>
> steps can be expressed using 'multipleOf'
>
will address in next post.
>> + default: 25
>
> 25 can never be a multiple of 2500
>
will correct in next post.
>> +
>> + qcom,current-boost-limit:
>> + maxItems: 1
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + mA; boost current limit.
>> + For pm8941 one of 105, 385, 525, 805, 980, 1260, 1400, 1680.
>> + Default, 805 mA.
>> + For pmi8998 one of 105, 280, 450, 620, 970, 1150, 1300,
>> + 1500. Default 970 mA.
>
> Constraints.
>
will address in next post.
>> +
>> + qcom,switching-freq:
>> + maxItems: 1
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + 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
>
> Constraints!
>
will address in next post.
>> +
>> + qcom,ovp:
>> + maxItems: 1
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + V; Over-voltage protection limit; one of 27, 29, 32, 35.
>> Default 29V
>> + This property is supported only for PM8941.
>> +
>> + qcom,ovp-millivolt:
>> + maxItems: 1
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + 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:
>> + maxItems: 1
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + number of led strings attached;
>> + value for PM8941 from 1 to 3. Default 2
>> + For PMI8998 from 1 to 4.
>> +
>> + interrupts:
>> + maxItems: 2
>
> items:
> - description: ...
> - description: ...
>
will address in next post.
>> + description:
>> + 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.
>
> encoding is outside the scope of the binding.
>
will address in next post.
>> +
>> + interrupt-names:
>> + description:
>> + Interrupt names associated with the interrupts.
>> + Must be "short" and "ovp". The short circuit detection
>> + is not supported for PM8941.
>
> Names should be constraints.
>
will address in next post.
>> +
>> + qcom,enabled-strings:
>> + maxItems: 1
>> + allOf:
>> + - $ref: /schemas/types.yaml#/definitions/uint32-array
>> + description:
>> + 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:
>> + description:
>> + Specify if external PFET control for short circuit
>> + protection is used. This property is supported only
>> + for PMI8998.
>> + type: boolean
>> +
>> + qcom,auto-string-detection:
>> + description:
>> + Enables auto-detection of the WLED string configuration.
>> + This feature is not supported for PM8941.
>> + type: boolean
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - label
>> +
>> +examples:
>> + - |
>> + pm8941-wled@...0 {
>
> backlight@...
>
will add in next post.
>> + compatible = "qcom,pm8941-wled";
>> + reg = <0xd800 0x100>;
>> + label = "backlight";
>> +
>> + qcom,cs-out;
>> + qcom,current-limit = <20>;
>> + qcom,current-boost-limit = <805>;
>> + qcom,switching-freq = <1600>;
>> + qcom,ovp = <29>;
>> + qcom,num-strings = <2>;
>> + qcom,enabled-strings = <0 1>;
>> + };
>> --
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
>> Forum,
>> a Linux Foundation Collaborative Project
>>
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