| MediaTek display PWM controller |
| |
| Required properties: |
| - compatible: should be "mediatek,<name>-disp-pwm": |
| - "mediatek,mt2701-disp-pwm": found on mt2701 SoC. |
| - "mediatek,mt6595-disp-pwm": found on mt6595 SoC. |
| - "mediatek,mt8173-disp-pwm": found on mt8173 SoC. |
| - reg: physical base address and length of the controller's registers. |
| - #pwm-cells: must be 2. See pwm.txt in this directory for a description of |
| the cell format. |
| - clocks: phandle and clock specifier of the PWM reference clock. |
| - clock-names: must contain the following: |
| - "main": clock used to generate PWM signals. |
| - "mm": sync signals from the modules of mmsys. |
| - pinctrl-names: Must contain a "default" entry. |
| - pinctrl-0: One property must exist for each entry in pinctrl-names. |
| See pinctrl/pinctrl-bindings.txt for details of the property values. |
| |
| Example: |
| pwm0: pwm@1401e000 { |
| compatible = "mediatek,mt8173-disp-pwm", |
| "mediatek,mt6595-disp-pwm"; |
| reg = <0 0x1401e000 0 0x1000>; |
| #pwm-cells = <2>; |
| clocks = <&mmsys CLK_MM_DISP_PWM026M>, |
| <&mmsys CLK_MM_DISP_PWM0MM>; |
| clock-names = "main", "mm"; |
| pinctrl-names = "default"; |
| pinctrl-0 = <&disp_pwm0_pins>; |
| }; |
| |
| backlight_lcd: backlight_lcd { |
| compatible = "pwm-backlight"; |
| pwms = <&pwm0 0 1000000>; |
| brightness-levels = < |
| 0 16 32 48 64 80 96 112 |
| 128 144 160 176 192 208 224 240 |
| 255 |
| >; |
| default-brightness-level = <9>; |
| power-supply = <&mt6397_vio18_reg>; |
| enable-gpios = <&pio 95 GPIO_ACTIVE_HIGH>; |
| }; |
