linux-kernel - Re: [PATCH v2 1/3] usb: chipidea: add CI_HDRC_FORCE_VBUS_ACTIVE

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Date:   Thu, 28 Sep 2023 17:53:55 +0800
From:   Peter Chen <peter.chen@...nel.org>
To:     Tomer Maimon <tmaimon77@...il.com>
Cc:     gregkh@...uxfoundation.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, xu.yang_2@....com,
        peng.fan@....com, avifishman70@...il.com, tali.perry1@...il.com,
        joel@....id.au, venture@...gle.com, yuenn@...gle.com,
        benjaminfair@...gle.com, j.neuschaefer@....net,
        openbmc@...ts.ozlabs.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/3] usb: chipidea: add
 CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS flag

On 23-09-27 12:55:07, Tomer Maimon wrote:
> Adding CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS flag to modify the vbus_active
> parameter to active in case the ChipIdea USB IP role is device-only and
> there is no otgsc register.
> 
> Signed-off-by: Tomer Maimon <tmaimon77@...il.com>

Acked-by: Peter Chen <peter.chen@...nel.org>

Peter
> ---
>  drivers/usb/chipidea/otg.c   | 5 ++++-
>  include/linux/usb/chipidea.h | 1 +
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
> index f5490f2a5b6b..647e98f4e351 100644
> --- a/drivers/usb/chipidea/otg.c
> +++ b/drivers/usb/chipidea/otg.c
> @@ -130,8 +130,11 @@ enum ci_role ci_otg_role(struct ci_hdrc *ci)
>  
>  void ci_handle_vbus_change(struct ci_hdrc *ci)
>  {
> -	if (!ci->is_otg)
> +	if (!ci->is_otg) {
> +		if (ci->platdata->flags & CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS)
> +			usb_gadget_vbus_connect(&ci->gadget);
>  		return;
> +	}
>  
>  	if (hw_read_otgsc(ci, OTGSC_BSV) && !ci->vbus_active)
>  		usb_gadget_vbus_connect(&ci->gadget);
> diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
> index 0b4f2d5faa08..5a7f96684ea2 100644
> --- a/include/linux/usb/chipidea.h
> +++ b/include/linux/usb/chipidea.h
> @@ -64,6 +64,7 @@ struct ci_hdrc_platform_data {
>  #define CI_HDRC_PMQOS			BIT(15)
>  #define CI_HDRC_PHY_VBUS_CONTROL	BIT(16)
>  #define CI_HDRC_HAS_PORTSC_PEC_MISSED	BIT(17)
> +#define CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS	BIT(18)
>  	enum usb_dr_mode	dr_mode;
>  #define CI_HDRC_CONTROLLER_RESET_EVENT		0
>  #define CI_HDRC_CONTROLLER_STOPPED_EVENT	1
> -- 
> 2.33.0
> 

-- 

Thanks,
Peter Chen