linux-kernel - Re: [RESEND PATCH v3] arm64: dts: ti: k3-am642-sk: Enable WLAN connected to SDHCI0

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Message-ID: <4d9da502-52b5-e5c1-7675-93c4341fb446@ti.com>
Date:   Thu, 28 Apr 2022 14:52:43 +0530
From:   Devarsh Thakkar <devarsht@...com>
To:     Aparna M <a-m1@...com>, <nm@...com>, <vigneshr@...com>,
        <kishon@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <praneeth@...com>, <nikhil.nd@...com>
Subject: Re: [RESEND PATCH v3] arm64: dts: ti: k3-am642-sk: Enable WLAN
 connected to SDHCI0


On 14/04/22 19:06, Aparna M wrote:
> From: Kishon Vijay Abraham I <kishon@...com>
>
> WL1837 module is connected to SDHCI0 in AM642 SK. Enable it here.
> This will enable the WiFi functionaliy on the board.
>
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
> Signed-off-by: Nikhil Devshatwar <nikhil.nd@...com>
> Signed-off-by: Aparna M <a-m1@...com>
Tested-by: Devarsh Thakkar <devarsht@...com>
> ---
>
> v3 RESEND: rebased on top of v5.18-rc2
> v2 -> v3: Use generic node names for the regulators as per DT Specs
> v1 -> v2: Add "From" tag in commit message
>
>  arch/arm64/boot/dts/ti/k3-am642-sk.dts | 62 ++++++++++++++++++++++++++
>  1 file changed, 62 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> index 1d7db8bf3a5c..59f506cbd275 100644
> --- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> @@ -125,6 +125,31 @@
>  		vin-supply = <&vcc_3v3_sys>;
>  		gpio = <&exp1 3 GPIO_ACTIVE_HIGH>;
>  	};
> +
> +	com8_ls_en: regulator-1 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "com8_ls_en";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +		pinctrl-0 = <&main_com8_ls_en_pins_default>;
> +		pinctrl-names = "default";
> +		gpio = <&main_gpio0 62 GPIO_ACTIVE_LOW>;
> +	};
> +
> +	wlan_en: regulator-2 {
> +		/* output of SN74AVC4T245RSVR */
> +		compatible = "regulator-fixed";
> +		regulator-name = "wlan_en";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		enable-active-high;
> +		pinctrl-0 = <&main_wlan_en_pins_default>;
> +		pinctrl-names = "default";
> +		vin-supply = <&com8_ls_en>;
> +		gpio = <&main_gpio0 48 GPIO_ACTIVE_HIGH>;
> +	};
>  };
>  
>  &main_pmx0 {
> @@ -216,6 +241,23 @@
>  			AM64X_IOPAD(0x0270, PIN_INPUT, 0) /* (D18) ECAP0_IN_APWM_OUT */
>  		>;
>  	};
> +	main_wlan_en_pins_default: main-wlan-en-pins-default {
> +		pinctrl-single,pins = <
> +			AM64X_IOPAD(0x00c4, PIN_OUTPUT_PULLUP, 7) /* (V8) GPIO0_48 */
> +		>;
> +	};
> +
> +	main_com8_ls_en_pins_default: main-com8-ls-en-pins-default {
> +		pinctrl-single,pins = <
> +			AM64X_IOPAD(0x00fc, PIN_OUTPUT, 7) /* (U7) PRG1_PRU0_GPO17.GPIO0_62 */
> +		>;
> +	};
> +
> +	main_wlan_pins_default: main-wlan-pins-default {
> +		pinctrl-single,pins = <
> +			AM64X_IOPAD(0x00bc, PIN_INPUT, 7) /* (U8) GPIO0_46 */
> +		>;
> +	};
>  };
>  
>  &mcu_uart0 {
> @@ -293,6 +335,26 @@
>  	status = "reserved";
>  };
>  
> +&sdhci0 {
> +	vmmc-supply = <&wlan_en>;
> +	bus-width = <4>;
> +	non-removable;
> +	cap-power-off-card;
> +	keep-power-in-suspend;
> +	ti,driver-strength-ohm = <50>;
> +
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	wlcore: wlcore@2 {
> +		compatible = "ti,wl1837";
> +		reg = <2>;
> +		pinctrl-0 = <&main_wlan_pins_default>;
> +		pinctrl-names = "default";
> +		interrupt-parent = <&main_gpio0>;
> +		interrupts = <46 IRQ_TYPE_EDGE_FALLING>;
> +	};
> +};
> +
>  &sdhci1 {
>  	/* SD/MMC */
>  	vmmc-supply = <&vdd_mmc1>;