Re: [PATCH V6 4/7] ARM: dts: imx6sx-sabreauto: add fec support

[Fabio Estevam]

On Sat, May 5, 2018 at 5:29 AM, Anson Huang <Anson.Huang@xxxxxxx> wrote:
> Add FEC support on i.MX6SX Sabre Auto board.
>
> Signed-off-by: Fugang Duan <fugang.duan@xxxxxxx>

Again, it is not clear who is the author here. Is it Fugang or yourself?

> Signed-off-by: Anson Huang <Anson.Huang@xxxxxxx>
> ---
> changes since V5:
>         use "gpios" instead of "enable-gpio".
>  arch/arm/boot/dts/imx6sx-sabreauto.dts | 80 ++++++++++++++++++++++++++++++++++
>  1 file changed, 80 insertions(+)
>
> diff --git a/arch/arm/boot/dts/imx6sx-sabreauto.dts b/arch/arm/boot/dts/imx6sx-sabreauto.dts
> index 4d41b4d..7dda741 100644
> --- a/arch/arm/boot/dts/imx6sx-sabreauto.dts
> +++ b/arch/arm/boot/dts/imx6sx-sabreauto.dts
> @@ -18,6 +18,17 @@
>                 reg = <0x80000000 0x80000000>;
>         };
>
> +       reg_fec: fec_io_supply {
> +               compatible = "regulator-gpio";
> +               regulator-name = "1.8V_1.5V_FEC";
> +               regulator-min-microvolt = <1500000>;
> +               regulator-max-microvolt = <1800000>;
> +               states = <1500000 0x0 1800000 0x1>;
> +               gpios = <&max7322 0 GPIO_ACTIVE_HIGH>;
> +               vin-supply = <&sw2_reg>;
> +               enable-active-high;
> +       };

I still find this confusing.

There is no consumer for reg_fec in, so it seems you are relying on
the fact that the kernel regulator core will disable reg_fec to put
the regulator in the state you require.