[RFC] [PATCH] imx8mp: power-domain: force usb powerdomain off on startup

[Börge Strümpfel]

Am Do., 15. Dez. 2022 um 15:43 Uhr schrieb Börge Strümpfel
<boerge.struempfel at gmail.com>:
>
> This patch fixes a bug, where usb-ether is not usable, after an imx8mp
> board has been booted using the uuu tool. In order to solve this, the usb
> power domain is turned off during the probe of the imx8mp-hsiomix driver.
> Thereby the usb controller is reset during startup and can operate
> normally thereafter.
>
> This was tested on an imx8mp-evk.
>
> Signed-off-by: Boerge Struempfel <bstruempfel at ultratronik.de>
> ---
>  drivers/power/domain/imx8mp-hsiomix.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/power/domain/imx8mp-hsiomix.c b/drivers/power/domain/imx8mp-hsiomix.c
> index 6a721a934a..a87595b8eb 100644
> --- a/drivers/power/domain/imx8mp-hsiomix.c
> +++ b/drivers/power/domain/imx8mp-hsiomix.c
> @@ -116,6 +116,7 @@ static int imx8mp_hsiomix_probe(struct udevice *dev)
>         ret = power_domain_get_by_name(dev, &priv->pd_usb, "usb");
>         if (ret < 0)
>                 goto err_pd_usb;
> +       power_domain_off(&priv->pd_bus);

 I noticed that, instead of the usb-powerdomain i turned off the
usb-powerdomain. Therefore this should probably be
'power_domain_off(&priv->pd_usb);'. However this should not make a
difference in function.

>
>
>         ret = power_domain_get_by_name(dev, &priv->pd_usb_phy1, "usb-phy1");
>         if (ret < 0)
> --
> 2.25.1
>