linux-kernel - Re: [PATCH v3 1/2] ARM: dts: axp803/axp81x: Drop GPIO LDO pinctrl nodes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4454781.cEBGB3zze1@kista>
Date:   Thu, 13 Oct 2022 00:01:38 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Chen-Yu Tsai <wens@...e.org>, Samuel Holland <samuel@...lland.org>
Cc:     Samuel Holland <samuel@...lland.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v3 1/2] ARM: dts: axp803/axp81x: Drop GPIO LDO pinctrl nodes

Hi Samuel,

Dne petek, 16. september 2022 ob 06:27:50 CEST je Samuel Holland napisal(a):
> The "ldo-io0" and "ldo-io1" regulators are enabled/disabled by toggling
> the pinmux between two functions. This happens in the regulator driver.
> Setting the pinmux to "ldo" in the DT is inappropriate because it would
> enable the regulator before the driver has a chance to set the correct
> initial voltage.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej
> ---
> 
> Changes in v3:
>  - Added patch to remove existing "ldo" pinctrl nodes
> 
>  arch/arm/boot/dts/axp81x.dtsi             | 14 --------------
>  arch/arm64/boot/dts/allwinner/axp803.dtsi | 10 ----------
>  2 files changed, 24 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/axp81x.dtsi b/arch/arm/boot/dts/axp81x.dtsi
> index b93387b0c1c3..ebaf1c3ce8db 100644
> --- a/arch/arm/boot/dts/axp81x.dtsi
> +++ b/arch/arm/boot/dts/axp81x.dtsi
> @@ -62,16 +62,6 @@ axp_gpio: gpio {
>  		compatible = "x-powers,axp813-gpio";
>  		gpio-controller;
>  		#gpio-cells = <2>;
> -
> -		gpio0_ldo: gpio0-ldo-pin {
> -			pins = "GPIO0";
> -			function = "ldo";
> -		};
> -
> -		gpio1_ldo: gpio1-ldo-pin {
> -			pins = "GPIO1";
> -			function = "ldo";
> -		};
>  	};
> 
>  	battery_power_supply: battery-power {
> @@ -144,15 +134,11 @@ reg_fldo3: fldo3 {
>  		};
> 
>  		reg_ldo_io0: ldo-io0 {
> -			pinctrl-names = "default";
> -			pinctrl-0 = <&gpio0_ldo>;
>  			/* Disable by default to avoid conflicts with 
GPIO */
>  			status = "disabled";
>  		};
> 
>  		reg_ldo_io1: ldo-io1 {
> -			pinctrl-names = "default";
> -			pinctrl-0 = <&gpio1_ldo>;
>  			/* Disable by default to avoid conflicts with 
GPIO */
>  			status = "disabled";
>  		};
> diff --git a/arch/arm64/boot/dts/allwinner/axp803.dtsi
> b/arch/arm64/boot/dts/allwinner/axp803.dtsi index
> 578ef368e2b4..a6b4b87f185d 100644
> --- a/arch/arm64/boot/dts/allwinner/axp803.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/axp803.dtsi
> @@ -25,16 +25,6 @@ axp_gpio: gpio {
>  		compatible = "x-powers,axp803-gpio", "x-powers,axp813-
gpio";
>  		gpio-controller;
>  		#gpio-cells = <2>;
> -
> -		gpio0_ldo: gpio0-ldo-pin {
> -			pins = "GPIO0";
> -			function = "ldo";
> -		};
> -
> -		gpio1_ldo: gpio1-ldo-pin {
> -			pins = "GPIO1";
> -			function = "ldo";
> -		};
>  	};
> 
>  	battery_power_supply: battery-power {
> --
> 2.35.1