Re: [PATCH v3 4/4] arm64: dts: rockchip: Add devicetree for Pine64 PineTab2

[Manuel Traut <manut@mecka.net>]

On Wed, Jan 03, 2024 at 10:42:54AM +0100, Ondřej Jirman wrote:
> Hello Manuel,
> 
> a few more things I noticed:
> 
> On Tue, Jan 02, 2024 at 05:15:47PM +0100, Manuel Traut wrote:
> > From: Alexander Warnecke <awarnecke002@hotmail.com>
> > 
> > +	leds {
> > +		compatible = "gpio-leds";
> > +
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&flash_led_en_h>;
> > +
> > +		led-0 {
> > +			gpios = <&gpio4 RK_PA5 GPIO_ACTIVE_HIGH>;
> > +			color = <LED_COLOR_ID_WHITE>;
> > +			function = LED_FUNCTION_FLASH;
> > +		};
> 
> This LED is supplied by VCC5V_MIDU, so maybe this should be a regulator-led
> supplied by gpio (FLASH_LED_EN_H) controlled regulator-fixed named f_led which
> is in turn supplied by VCC5V_MIDU.
> 
> https://megous.com/dl/tmp/9bf0d85d78946b5e.png

regulator-leds are controlled by turning on or off the regulator. However
VCC5V_MIDU is also used by other devices (USB, HDMI, ..) so I guess this is
not what we want. I would keep it as is.

> > +	};
> > +
> > [...]
> >
> > +
> > +	speaker_amp: speaker-amplifier {
> > +		compatible = "simple-audio-amplifier";
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&spk_ctl>;
> > +		enable-gpios = <&gpio4 RK_PC2 GPIO_ACTIVE_HIGH>;
> > +		sound-name-prefix = "Speaker Amplifier";
> > +		VCC-supply = <&vcc_bat>;
> > +	};
> > +
> > +	vcc_3v3: vcc-3v3 {
> > +		compatible = "regulator-fixed";
> > +		regulator-name = "vcc_3v3";
> > +		regulator-always-on;
> > +		regulator-boot-on;
> > +		regulator-min-microvolt = <3300000>;
> > +		regulator-max-microvolt = <3300000>;
> > +		vin-supply = <&vcc3v3_sys>;
> > +	};
> > +
> > +	vcc3v3_minipcie: vcc3v3-minipcie {
> > +		compatible = "regulator-fixed";
> > +		enable-active-high;
> > +		gpio = <&gpio4 RK_PC3 GPIO_ACTIVE_HIGH>;
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&pcie_pwren_h>;
> > +		regulator-name = "vcc3v3_minipcie";
> > +		regulator-min-microvolt = <3300000>;
> > +		regulator-max-microvolt = <3300000>;
> > +		vin-supply = <&vcc_sys>;
> 
> This regulator is supplied by vcc_bat: https://megous.com/dl/tmp/4ec71a4a2aea9498.png

correct, I will update this in v4.

> > +	};
> > +
> > +	vcc3v3_sd: vcc3v3-sd {
> > +		compatible = "regulator-fixed";
> > +		gpio = <&gpio0 RK_PA5 GPIO_ACTIVE_HIGH>;
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&sdmmc_pwren_l>;
> > +		regulator-name = "vcc3v3_sd";
> > +		regulator-min-microvolt = <3300000>;
> > +		regulator-max-microvolt = <3300000>;
> > +		vin-supply = <&vcc3v3_sys>;
> > +	};
> > +
> > +	vcc5v0_usb_host0: vcc5v0-usb-host0 {
> > +		compatible = "regulator-fixed";
> > +		enable-active-high;
> > +		gpio = <&gpio4 RK_PC4 GPIO_ACTIVE_HIGH>;
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&usb_host_pwren1_h>;
> > +		regulator-name = "vcc5v0_usb_host0";
> > +		regulator-min-microvolt = <5000000>;
> > +		regulator-max-microvolt = <5000000>;
> > +		vin-supply = <&vcc5v_midu>;
> > +	};
> > +
> > +	vcc5v0_usb_host2: vcc5v0-usb-host2 {
> > +		compatible = "regulator-fixed";
> > +		enable-active-high;
> > +		gpio = <&gpio4 RK_PC5 GPIO_ACTIVE_HIGH>;
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&usb_host_pwren2_h>;
> > +		regulator-name = "vcc5v0_usb_host2";
> > +		regulator-min-microvolt = <5000000>;
> > +		regulator-max-microvolt = <5000000>;
> > +		vin-supply = <&vcc5v_midu>;
> > +	};
> > +
> > +	vcc_bat: vcc-bat {
> > +		compatible = "regulator-fixed";
> > +		regulator-name = "vcc_bat";
> > +		regulator-always-on;
> > +		regulator-boot-on;
> > +	};
> > +
> > +	vcc_sys: vcc-sys {
> > +		compatible = "regulator-fixed";
> > +		regulator-name = "vcc_sys";
> > +		regulator-always-on;
> > +		regulator-boot-on;
> > +		vin-supply = <&vcc_bat>;
> > +	};
> > +
> > +	vdd1v2_dvp: vdd1v2-dvp {
> > +		compatible = "regulator-fixed";
> > +		regulator-name = "vdd1v2_dvp";
> > +		regulator-min-microvolt = <1200000>;
> > +		regulator-max-microvolt = <1200000>;
> > +		vin-supply = <&vcc_3v3>;
> > +		/*enable-supply = <&vcc2v8_dvp>;*/
> > +	};
> 
> There's no vdd1v2_dvp in the schematic on the camera sensor connector, or elsewhere:
>
>   https://megous.com/dl/tmp/fd95f003d8f3fbfb.png

It is on page 5 in the power diagram on the right top.

> So I guess, you can drop this, entirely. Maybe it's VDD1V5_DVP but I don't think
> it needs to be described in DT, since it's pretty local to this camera sensor,
> and nothing else uses it.
> 
>   https://megous.com/dl/tmp/7fc384e196c5428f.png

dvdd-supply is a required property of the ov5648 camera, so I would tend to keep
this. But us vcc_sys for vin-supply instead of vcc_3v3.

Regards
Manuel