linux-kernel - Re: [PATCH v3 RESEND 1/4] phy: core: add notify_connect and notify

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Message-ID: <c0af54de-2664-4c20-2d01-7fc64c98b238@gmail.com>
Date:   Thu, 7 Dec 2023 11:54:29 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...il.com>
To:     Stanley Chang <stanley_chang@...ltek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Vinod Koul <vkoul@...nel.org>, Johan Hovold <johan@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Jinjie Ruan <ruanjinjie@...wei.com>,
        Rob Herring <robh@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Flavio Suligoi <f.suligoi@...m.it>,
        Ricardo Cañuelo <ricardo.canuelo@...labora.com>,
        linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 RESEND 1/4] phy: core: add notify_connect and
 notify_disconnect callback

On 12/7/23 10:38 AM, Stanley Chang wrote:

> In Realtek SoC, the parameter of usb phy is designed to can dynamic
> tuning base on port status. Therefore, add a notify callback of phy

   To be able to do dynamic tuning based in the port status, maybe?

> driver when usb connection/disconnection change.
> 
> Signed-off-by: Stanley Chang <stanley_chang@...ltek.com>
[...]
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index 96a0b1e111f3..a84ad4896b7f 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -489,6 +489,53 @@ int phy_calibrate(struct phy *phy)
>  }
>  EXPORT_SYMBOL_GPL(phy_calibrate);
>  
> +/**
> + * phy_notify_connect() - phy connect notify

   Notification?

> + * @phy: the phy returned by phy_get()
> + * @port: the port index for connect
> + *
> + * If phy need the get connection status, the callback can be used.

   If the PHY needs to get the connection status, maybe?

> + * Returns: %0 if successful, a negative error code otherwise
> + */
> +int phy_notify_connect(struct phy *phy, int port)
> +{
> +	int ret;
> +
> +	if (!phy || !phy->ops->connect)
> +		return 0;
> +
> +	mutex_lock(&phy->mutex);
> +	ret = phy->ops->connect(phy, port);
> +	mutex_unlock(&phy->mutex);
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(phy_notify_connect);
> +
> +/**
> + * phy_notify_disconnect() - phy disconnect notify

   Notification?

> + * @phy: the phy returned by phy_get()
> + * @port: the port index for disconnect
> + *
> + * If phy need the get disconnection status, the callback can be used.

   If the PHY needs to get the connection status, maybe?

[...]
> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> index f6d607ef0e80..cf98cb29ddaa 100644
> --- a/include/linux/phy/phy.h
> +++ b/include/linux/phy/phy.h
[...]

MBR, Sergey