Acked-by: Anson Huang <anson.huang@xxxxxxx>
I also saw such issue on i.MX6SLL evk board, and also sent out patch for i.MX6SLL.
Anson Huang
Best Regards!
> -----Original Message-----
> From: Robin Gong
> Sent: Monday, June 25, 2018 8:34 PM
> To: shawnguo@xxxxxxxxxx; kernel@xxxxxxxxxxxxxx; Fabio Estevam
> <fabio.estevam@xxxxxxx>; robh+dt@xxxxxxxxxx; mark.rutland@xxxxxxx;
> Anson Huang <anson.huang@xxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx;
> linux-kernel@xxxxxxxxxxxxxxx; dl-linux-imx <linux-imx@xxxxxxx>
> Subject: [PATCH v1] ARM: dts: imx6sl-evk: keep sw4 always on
>
> SW4 is one power rail for LPDDR2 on i.mx6sl-evk, so it should be kept always on.
> But it's disabled after switch disabled interface implemented in pfuze driver
> 'commit 5fe156f1cab4
> ("regulator: pfuze100: add enable/disable for switch")'.Thus, it breaks kernel
> bootup. Add 'regulator-always-on' for SW4.
>
> Signed-off-by: Robin Gong <yibin.gong@xxxxxxx>
> ---
> arch/arm/boot/dts/imx6sl-evk.dts | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/imx6sl-evk.dts
> b/arch/arm/boot/dts/imx6sl-evk.dts
> index 37e792f..798df66 100644
> --- a/arch/arm/boot/dts/imx6sl-evk.dts
> +++ b/arch/arm/boot/dts/imx6sl-evk.dts
> @@ -199,6 +199,7 @@
> sw4_reg: sw4 {
> regulator-min-microvolt = <800000>;
> regulator-max-microvolt = <3300000>;
> + regulator-always-on;
> };
>
> swbst_reg: swbst {
> --
> 2.7.4
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