Hi Vinod,
Please help review this patch.
Thanks,
Stanley
> -----Original Message-----
> From: Stanley Chang <[email protected]>
> Sent: Friday, November 10, 2023 1:45 PM
> To: Greg Kroah-Hartman <[email protected]>
> Cc: Stanley Chang[昌育德] <[email protected]>; Vinod Koul
> <[email protected]>; Johan Hovold <[email protected]>; Kishon Vijay Abraham
> I <[email protected]>; Geert Uytterhoeven <[email protected]>; Jinjie
> Ruan <[email protected]>; Rob Herring <[email protected]>; Alan Stern
> <[email protected]>; Yang Yingliang <[email protected]>;
> Flavio Suligoi <[email protected]>; Roy Luo <[email protected]>; Heikki
> Krogerus <[email protected]>; Ricardo Cañuelo
> <[email protected]>; [email protected];
> [email protected]; [email protected]
> Subject: [PATCH v3 1/4] phy: core: add notify_connect and notify_disconnect
> callback
>
> 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 driver when usb
> connection/disconnection change.
>
> Signed-off-by: Stanley Chang <[email protected]>
> ---
> v1 to v2:
> No change
> v2 to v3:
> No change
> ---
> drivers/phy/phy-core.c | 47
> +++++++++++++++++++++++++++++++++++++++++
> include/linux/phy/phy.h | 18 ++++++++++++++++
> 2 files changed, 65 insertions(+)
>
> 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
> + * @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.
> + * 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
> + * @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.
> + *
> + * Returns: %0 if successful, a negative error code otherwise */ int
> +phy_notify_disconnect(struct phy *phy, int port) {
> + int ret;
> +
> + if (!phy || !phy->ops->disconnect)
> + return 0;
> +
> + mutex_lock(&phy->mutex);
> + ret = phy->ops->disconnect(phy, port);
> + mutex_unlock(&phy->mutex);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(phy_notify_disconnect);
> +
> /**
> * phy_configure() - Changes the phy parameters
> * @phy: the phy returned by phy_get()
> 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
> @@ -122,6 +122,8 @@ struct phy_ops {
> union phy_configure_opts *opts);
> int (*reset)(struct phy *phy);
> int (*calibrate)(struct phy *phy);
> + int (*connect)(struct phy *phy, int port);
> + int (*disconnect)(struct phy *phy, int port);
> void (*release)(struct phy *phy);
> struct module *owner;
> };
> @@ -243,6 +245,8 @@ static inline enum phy_mode phy_get_mode(struct
> phy *phy) } int phy_reset(struct phy *phy); int phy_calibrate(struct phy
> *phy);
> +int phy_notify_connect(struct phy *phy, int port); int
> +phy_notify_disconnect(struct phy *phy, int port);
> static inline int phy_get_bus_width(struct phy *phy) {
> return phy->attrs.bus_width;
> @@ -396,6 +400,20 @@ static inline int phy_calibrate(struct phy *phy)
> return -ENOSYS;
> }
>
> +static inline int phy_notify_connect(struct phy *phy, int index) {
> + if (!phy)
> + return 0;
> + return -ENOSYS;
> +}
> +
> +static inline int phy_notify_disconnect(struct phy *phy, int index) {
> + if (!phy)
> + return 0;
> + return -ENOSYS;
> +}
> +
> static inline int phy_configure(struct phy *phy,
> union phy_configure_opts *opts)
> {
> --
> 2.34.1