linux-kernel - Re: [PATCH 1/4] ARM: dts: omap: omap4-epson-embt2ws: define GPIO regulators

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Message-ID: <3c83c399-708c-41e2-988d-4ccec63c6042@kernel.org>
Date: Fri, 4 Oct 2024 10:24:32 +0300
From: Roger Quadros <rogerq@...nel.org>
To: Andreas Kemnade <andreas@...nade.info>, Conor Dooley
 <conor+dt@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 linux-kernel@...r.kernel.org, Rob Herring <robh@...nel.org>,
 khilman@...libre.com, devicetree@...r.kernel.org, tony@...mide.com,
 aaro.koskinen@....fi, linux-omap@...r.kernel.org
Subject: Re: [PATCH 1/4] ARM: dts: omap: omap4-epson-embt2ws: define GPIO
 regulators



On 01/10/2024 00:30, Andreas Kemnade wrote:
> To properly have things running after cold boot, define
> GPIO regulators. Naming is based on board file.
> 
> In the vendor kernel they are enabled in a function
> called bt2ws_dcdc_init() if the system is not booted just
> to charge the battery.
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---
>  .../boot/dts/ti/omap/omap4-epson-embt2ws.dts  | 73 +++++++++++++++++++
>  1 file changed, 73 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
> index 339e52ba3614..d6b0abba19f6 100644
> --- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
> +++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
> @@ -29,6 +29,42 @@ backlight-right {
>  		power-supply = <&unknown_supply>;
>  	};
>  
> +	cb_v18: cb-v18 {

https://devicetree-specification.readthedocs.io/en/v0.3/devicetree-basics.html#generic-names-recommendation


So regulator@n
where n is some index if it can't be address.

> +		pinctrl-names = "default";
> +		pinctrl-0 = <&cb_v18_pins>;
> +		compatible = "regulator-fixed";
> +		regulator-name = "cb_v18";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		regulator-always-on;
> +		gpio = <&gpio1 28 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +	};
> +
> +	cb_v33: cb-v33 {
here

> +		pinctrl-names = "default";
> +		pinctrl-0 = <&cb_v33_pins>;
> +		compatible = "regulator-fixed";
> +		regulator-name = "cb_v33";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +		gpio = <&gpio6 30 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +	};
> +
> +	cb-v50 {
here too

> +		pinctrl-names = "default";
> +		pinctrl-0 = <&cb_v50_pins>;
> +		compatible = "regulator-fixed";
> +		regulator-name = "cb_v50";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		regulator-always-on;
> +		gpio = <&gpio6 31 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +	};
> +
>  	chosen {
>  		stdout-path = &uart3;
>  	};
> @@ -46,6 +82,19 @@ key-lock {
>  		};
>  	};
>  
> +	lb_v50: lb-v50 {
and here as well

> +		/* required for many things at the head (probably indirectly) */
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&lb_v50_pins>;
> +		compatible = "regulator-fixed";
> +		regulator-name = "lb_v50";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		regulator-always-on;
> +		gpio = <&gpio1 27 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +	};
> +
>  	unknown_supply: unknown-supply {
>  		compatible = "regulator-fixed";
>  		regulator-name = "unknown";
> @@ -336,6 +385,24 @@ OMAP4_IOPAD(0x1ca, PIN_OUTPUT | MUX_MODE3) /* gpio25 */
>  		>;
>  	};
>  
> +	cb_v18_pins: pinmux-cb-v18-pins {
> +		pinctrl-single,pins = <
> +			OMAP4_IOPAD(0x1d0, PIN_OUTPUT | MUX_MODE3) /* gpio28 */
> +		>;
> +	};
> +
> +	cb_v33_pins: pinmux-cb-v33-pins {
> +		pinctrl-single,pins = <
> +			OMAP4_IOPAD(0x1d2, PIN_OUTPUT | MUX_MODE3) /* gpio190 */
> +		>;
> +	};
> +
> +	cb_v50_pins: pinmux-cb-v50-pins {
> +		pinctrl-single,pins = <
> +			OMAP4_IOPAD(0x1d4, PIN_OUTPUT | MUX_MODE3) /* gpio191 */
> +		>;
> +	};
> +
>  	gpio_keys_pins: pinmux-gpio-key-pins {
>  		pinctrl-single,pins = <
>  			OMAP4_IOPAD(0x56, PIN_INPUT_PULLUP | MUX_MODE3) /* gpio35 */
> @@ -387,6 +454,12 @@ OMAP4_IOPAD(0x005c, PIN_OUTPUT | MUX_MODE1)
>  		>;
>  	};
>  
> +	lb_v50_pins: pinmux-lb-v50-pins {
> +		pinctrl-single,pins = <
> +			OMAP4_IOPAD(0x1ce, PIN_OUTPUT | MUX_MODE3) /* gpio27 */
> +		>;
> +	};
> +
>  	mcbsp2_pins: pinmux-mcbsp2-pins {
>  		pinctrl-single,pins = <
>  			OMAP4_IOPAD(0x0f6, PIN_INPUT | MUX_MODE0)       /* abe_mcbsp2_clkx */

-- 
cheers,
-roger