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[1.171.3.209]) by smtp.gmail.com with ESMTPSA id t133sm228633pgb.0.2021.05.12.08.21.53 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 12 May 2021 08:21:56 -0700 (PDT) From: cy_huang To: lee.jones@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, b.zolnierkie@samsung.com, pavel@ucw.cz, robh+dt@kernel.org Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, cy_huang@richtek.com Subject: [PATCH v7 3/4] mfd: rt4831: Adds DT binding document for Richtek RT4831 Date: Wed, 12 May 2021 23:21:39 +0800 Message-Id: <1620832900-8347-3-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1620832900-8347-1-git-send-email-u0084500@gmail.com> References: <1620832900-8347-1-git-send-email-u0084500@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org From: ChiYuan Huang Adds DT binding document for Richtek RT4831. Signed-off-by: ChiYuan Huang Reviewed-by: Rob Herring --- .../devicetree/bindings/mfd/richtek,rt4831.yaml | 90 ++++++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml diff --git a/Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml b/Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml new file mode 100644 index 00000000..4762eb1 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml @@ -0,0 +1,90 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/richtek,rt4831.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Richtek RT4831 DSV and Backlight Integrated IC + +maintainers: + - ChiYuan Huang + +description: | + RT4831 is a multifunctional device that can provide power to the LCD display + and LCD backlight. + + For Display Bias Voltage DSVP and DSVN, the output range is about 4V to 6.5V. + It's sufficient to meet the current LCD power requirement. + + For the LCD backlight, it can provide four channel WLED driving capability. + Each channel driving current is up to 30mA + + Datasheet is available at + https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf + +properties: + compatible: + const: richtek,rt4831 + + reg: + description: I2C device address. + maxItems: 1 + + enable-gpios: + description: | + GPIO to enable/disable the chip. It is optional. + Some usage directly tied this pin to follow VIO 1.8V power on sequence. + maxItems: 1 + + regulators: + $ref: ../regulator/richtek,rt4831-regulator.yaml + + backlight: + $ref: ../leds/backlight/richtek,rt4831-backlight.yaml + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + rt4831@11 { + compatible = "richtek,rt4831"; + reg = <0x11>; + + regulators { + DSVLCM { + regulator-min-microvolt = <4000000>; + regulator-max-microvolt = <7150000>; + regulator-allow-bypass; + }; + DSVP { + regulator-name = "rt4831-dsvp"; + regulator-min-microvolt = <4000000>; + regulator-max-microvolt = <6500000>; + regulator-boot-on; + }; + DSVN { + regulator-name = "rt4831-dsvn"; + regulator-min-microvolt = <4000000>; + regulator-max-microvolt = <6500000>; + regulator-boot-on; + }; + }; + + backlight { + compatible = "richtek,rt4831-backlight"; + default-brightness = <1024>; + max-brightness = <2048>; + richtek,bled-ovp-sel = /bits/ 8 ; + richtek,channel-use = /bits/ 8 ; + }; + }; + };