linux-kernel - Re: [PATCH V3] ARM: dts: imx6sll-evk: make pfuze100 sw4 always on

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Date:   Sun, 1 Jul 2018 21:32:44 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Anson Huang <Anson.Huang@....com>
Cc:     s.hauer@...gutronix.de, kernel@...gutronix.de,
        fabio.estevam@....com, robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, Linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] ARM: dts: imx6sll-evk: make pfuze100 sw4 always on

On Wed, Jun 27, 2018 at 09:25:25AM +0800, Anson Huang wrote:
> On i.MX6SLL EVK board, PFuze100's SW4 is supplying
> LPDDR3, it needs to be always on. This patch fixes
> Linux kernel boot up hang caused by commit 5fe156f1cab4
> ("regulator: pfuze100: add enable/disable for switch"),
> because SW4 is turned off unexpectedly:
> 
> [    1.693613] cfg80211: failed to load regulatory.db
> [    1.700063] SW4: disabling
> [    1.703973] SWBST: disabling
> 
> Fixes: 5fe156f1cab4 ("regulator: pfuze100: add enable/disable for switch")
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> Reviewed-by: Fabio Estevam <fabio.estevam@....com>

Just want to understand if we agree to break the existing DTB with v4.18
kernel?

Shawn

> ---
> changes since V2:
> 	improve the way of referencing commit, and add fix tag.
>  arch/arm/boot/dts/imx6sll-evk.dts | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/boot/dts/imx6sll-evk.dts b/arch/arm/boot/dts/imx6sll-evk.dts
> index 4684ac4..2217c40 100644
> --- a/arch/arm/boot/dts/imx6sll-evk.dts
> +++ b/arch/arm/boot/dts/imx6sll-evk.dts
> @@ -142,6 +142,7 @@
>  			sw4_reg: sw4 {
>  				regulator-min-microvolt = <800000>;
>  				regulator-max-microvolt = <3300000>;
> +				regulator-always-on;
>  			};
>  
>  			swbst_reg: swbst {
> -- 
> 2.7.4
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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