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Message-ID: <20200310150159.vg2k44zn57me6wzk@holly.lan>
Date: Tue, 10 Mar 2020 15:01:59 +0000
From: Daniel Thompson <daniel.thompson@...aro.org>
To: Kiran Gunda <kgunda@...eaurora.org>
Cc: bjorn.andersson@...aro.org, jingoohan1@...il.com,
lee.jones@...aro.org, b.zolnierkie@...sung.com,
dri-devel@...ts.freedesktop.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, Dan Murphy <dmurphy@...com>,
linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH V3 1/4] backlight: qcom-wled: convert the wled bindings
to .yaml format
On Mon, Mar 09, 2020 at 06:55:59PM +0530, Kiran Gunda wrote:
> Convert the qcom-wled bindings from .txt to .yaml format.
>
> Signed-off-by: Kiran Gunda <kgunda@...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.txt b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
> deleted file mode 100644
> index c06863b..0000000
> --- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt
> +++ /dev/null
> @@ -1,154 +0,0 @@
> -Binding for Qualcomm Technologies, Inc. WLED driver
> -
> -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.
> -
> -- compatible
> - Usage: required
> - Value type: <string>
> - Definition: should be one of:
> - "qcom,pm8941-wled"
> - "qcom,pmi8998-wled"
> - "qcom,pm660l-wled"
> -
> -- reg
> - Usage: required
> - Value type: <prop encoded array>
> - Definition: Base address of the WLED modules.
> -
> -- default-brightness
> - Usage: optional
> - Value type: <u32>
> - Definition: brightness value on boot, value from: 0-4095.
> - Default: 2048
> -
> -- label
> - Usage: required
> - Value type: <string>
> - Definition: The name of the backlight device
> -
> -- qcom,cs-out
> - Usage: optional
> - Value type: <bool>
> - Definition: enable current sink output.
> - This property is supported only for PM8941.
> -
> -- qcom,cabc
> - Usage: optional
> - Value type: <bool>
> - Definition: enable content adaptive backlight control.
> -
> -- qcom,ext-gen
> - Usage: optional
> - Value type: <bool>
> - Definition: use externally generated modulator signal to dim.
> - This property is supported only for PM8941.
> -
> -- qcom,current-limit
> - Usage: optional
> - Value type: <u32>
> - 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.
> - For pmi8998: one of: 105, 280, 450, 620, 970, 1150, 1300,
> - 1500. Default: 970 mA.
> -
> -- qcom,switching-freq
> - Usage: optional
> - Value type: <u32>
> - 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
> - 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: 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:
> -
> -pm8941-wled@...0 {
> - compatible = "qcom,pm8941-wled";
> - reg = <0xd800>;
> - 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>;
> -};
> 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..d334f81
> --- /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
> +---
> +$id: http://devicetree.org/schemas/bindings/leds/backlight/qcom-wled.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Binding for Qualcomm Technologies, Inc. WLED driver
> +
> +maintainers:
> + - Lee Jones <lee.jones@...aro.org>
> +
> +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 :
> + enum:
> + - qcom,pm8941-wled
> + - qcom,pmi8998-wled
> + - qcom,pm660l-wled
> +
> + reg:
> + maxItems: 1
> +
> + default-brightness:
> + maxItems: 1
> + description:
> + brightness value on boot, value from 0-4095.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + default: 2048
> +
> + label:
> + maxItems: 1
> + description:
> + The name of the backlight device.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/string
> +
> + 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
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + mA; per-string current limit; value from 0 to 25 with
> + 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
> + description:
> + uA; per-string current limit; value from 0 to 30000 with
> + 2500 uA step.
> + default: 25
> +
> + 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.
> +
> + 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
> +
> + 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
> + 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.
> +
> + interrupt-names:
> + description:
> + Interrupt names associated with the interrupts.
> + Must be "short" and "ovp". The short circuit detection
> + is not supported for PM8941.
> +
> + 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 {
> + 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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