[Linux-stm32] [PATCH 2/2] usb: typec: mux: gpio-sbu: enable when only used for orientation

[Heikki Krogerus]

On Tue, Aug 25, 2026 at 02:54:24PM +0200, Fabrice Gasnier wrote:
> When used as orientation-switch only (no mode-switch, e.g. no altmode),
> the optional enable gpio remains disabled.
> Enable it from the switch_set() routine, in this case, when the
> orientation is set and the enable-gpios property has been provided.
> 
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier at foss.st.com>

Acked-by: Heikki Krogerus <heikki.krogerus at linux.intel.com>

> ---
>  drivers/usb/typec/mux/gpio-sbu-mux.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/usb/typec/mux/gpio-sbu-mux.c b/drivers/usb/typec/mux/gpio-sbu-mux.c
> index 1834f1a2dd9d..4151d78e3b8d 100644
> --- a/drivers/usb/typec/mux/gpio-sbu-mux.c
> +++ b/drivers/usb/typec/mux/gpio-sbu-mux.c
> @@ -17,6 +17,7 @@ struct gpio_sbu_mux {
>  
>  	struct typec_switch_dev *sw;
>  	struct typec_mux_dev *mux;
> +	bool mode_switch;
>  
>  	struct mutex lock; /* protect enabled and swapped */
>  	bool enabled;
> @@ -40,9 +41,13 @@ static int gpio_sbu_switch_set(struct typec_switch_dev *sw,
>  		enabled = false;
>  		break;
>  	case TYPEC_ORIENTATION_NORMAL:
> +		if (!sbu_mux->mode_switch)
> +			enabled = true;
>  		swapped = false;
>  		break;
>  	case TYPEC_ORIENTATION_REVERSE:
> +		if (!sbu_mux->mode_switch)
> +			enabled = true;
>  		swapped = true;
>  		break;
>  	}
> @@ -125,6 +130,8 @@ static int gpio_sbu_mux_probe(struct platform_device *pdev)
>  		return dev_err_probe(dev, PTR_ERR(sbu_mux->sw),
>  				     "failed to register typec switch\n");
>  
> +	sbu_mux->mode_switch = device_property_read_bool(dev, "mode-switch");
> +
>  	mux_desc.drvdata = sbu_mux;
>  	mux_desc.fwnode = dev_fwnode(dev);
>  	mux_desc.set = gpio_sbu_mux_set;
> 
> -- 
> 2.43.0

-- 
heikki