linux-kernel - Re: [PATCH 1/5] arm64: dts: ti: j721e-sk: Add DT nodes for power regulators

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Message-ID: <20250407134148.jk43mzr5iyk4htyy@unplanned>
Date: Mon, 7 Apr 2025 08:41:48 -0500
From: Nishanth Menon <nm@...com>
To: Yemike Abhilash Chandra <y-abhilashchandra@...com>
CC: <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <vaishnav.a@...com>,
        <jai.luthra@...ux.dev>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <imx@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>, <u-kumar1@...com>
Subject: Re: [PATCH 1/5] arm64: dts: ti: j721e-sk: Add DT nodes for power
 regulators

On 17:10-20250401, Yemike Abhilash Chandra wrote:
> Add device tree nodes for two power regulators on the J721E SK board.
> vsys_5v0: A fixed regulator representing the 5V supply output from the
> LM61460 and vdd_sd_dv: A GPIO-controlled TLV71033 regulator.
> 
> J721E-SK schematics: https://www.ti.com/lit/zip/sprr438
> Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 31 ++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> index 440ef57be294..4965957e6545 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> @@ -184,6 +184,17 @@ vsys_3v3: fixedregulator-vsys3v3 {
>  		regulator-boot-on;
>  	};
>  
> +	vsys_5v0: fixedregulator-vsys5v0 {
> +		/* Output of LM61460 */
> +		compatible = "regulator-fixed";
> +		regulator-name = "vsys_5v0";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		vin-supply = <&vusb_main>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
>  	vdd_mmc1: fixedregulator-sd {
>  		compatible = "regulator-fixed";
>  		pinctrl-names = "default";
> @@ -211,6 +222,20 @@ vdd_sd_dv_alt: gpio-regulator-tps659411 {
>  			 <3300000 0x1>;
>  	};
>  
> +	vdd_sd_dv: gpio-regulator-TLV71033 {

Where is this used?

> +		compatible = "regulator-gpio";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&vdd_sd_dv_pins_default>;
> +		regulator-name = "tlv71033";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-boot-on;
> +		vin-supply = <&vsys_5v0>;
> +		gpios = <&main_gpio0 118 GPIO_ACTIVE_HIGH>;
> +		states = <1800000 0x0>,
> +			 <3300000 0x1>;
> +	};
> +
>  	transceiver1: can-phy1 {
>  		compatible = "ti,tcan1042";
>  		#phy-cells = <0>;
> @@ -613,6 +638,12 @@ J721E_WKUP_IOPAD(0xd4, PIN_OUTPUT, 7) /* (G26) WKUP_GPIO0_9 */
>  		>;
>  	};
>  
> +	vdd_sd_dv_pins_default: vdd-sd-dv-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0x1dc, PIN_INPUT, 7) /* (Y1) SPI1_CLK.GPIO0_118 */
> +		>;
> +	};
> +
>  	wkup_uart0_pins_default: wkup-uart0-default-pins {
>  		pinctrl-single,pins = <
>  			J721E_WKUP_IOPAD(0xa0, PIN_INPUT, 0) /* (J29) WKUP_UART0_RXD */
> -- 
> 2.34.1
> 

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D