diff mbox series

[v2,1/2] phy: tegra: xusb: Add API to retrieve the port number of phy

Message ID 20240307030328.1487748-2-waynec@nvidia.com
State Accepted
Headers show
Series Fix incorrect USB3 phy parsing in tegra-xudc | expand

Commit Message

Wayne Chang March 7, 2024, 3:03 a.m. UTC 
This patch introduces a new API, tegra_xusb_padctl_get_port_number,
to the Tegra XUSB Pad Controller driver. This API is used to identify
the USB port that is associated with a given PHY.

The function takes a PHY pointer for either a USB2 PHY or USB3 PHY as input
and returns the corresponding port number. If the PHY pointer is invalid,
it returns -ENODEV.

Cc: stable@vger.kernel.org
Signed-off-by: Wayne Chang <waynec@nvidia.com>
---
V1 -> V2:cc stable
 drivers/phy/tegra/xusb.c       | 13 +++++++++++++
 include/linux/phy/tegra/xusb.h |  1 +
 2 files changed, 14 insertions(+)

Comments

Jon Hunter March 7, 2024, 1:43 p.m. UTC | #1 
On 07/03/2024 03:03, Wayne Chang wrote:
> This patch introduces a new API, tegra_xusb_padctl_get_port_number,
> to the Tegra XUSB Pad Controller driver. This API is used to identify
> the USB port that is associated with a given PHY.
> 
> The function takes a PHY pointer for either a USB2 PHY or USB3 PHY as input
> and returns the corresponding port number. If the PHY pointer is invalid,
> it returns -ENODEV.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Wayne Chang <waynec@nvidia.com>
> ---
> V1 -> V2:cc stable
>   drivers/phy/tegra/xusb.c       | 13 +++++++++++++
>   include/linux/phy/tegra/xusb.h |  1 +
>   2 files changed, 14 insertions(+)
> 
> diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
> index 142ebe0247cc..983a6e6173bd 100644
> --- a/drivers/phy/tegra/xusb.c
> +++ b/drivers/phy/tegra/xusb.c
> @@ -1531,6 +1531,19 @@ int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
>   }
>   EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
>   
> +int tegra_xusb_padctl_get_port_number(struct phy *phy)
> +{
> +	struct tegra_xusb_lane *lane;
> +
> +	if (!phy)
> +		return -ENODEV;
> +
> +	lane = phy_get_drvdata(phy);
> +
> +	return lane->index;
> +}
> +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_port_number);
> +
>   MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
>   MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
>   MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/phy/tegra/xusb.h b/include/linux/phy/tegra/xusb.h
> index 70998e6dd6fd..6ca51e0080ec 100644
> --- a/include/linux/phy/tegra/xusb.h
> +++ b/include/linux/phy/tegra/xusb.h
> @@ -26,6 +26,7 @@ void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy);
>   int tegra_phy_xusb_utmi_port_reset(struct phy *phy);
>   int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
>   					 unsigned int port);
> +int tegra_xusb_padctl_get_port_number(struct phy *phy);
>   int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
>   					   enum usb_device_speed speed);
>   int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy);



Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>

Thanks!

Jon
Vinod Koul April 5, 2024, 4:59 p.m. UTC | #2 
On 07-03-24, 11:03, Wayne Chang wrote:
> This patch introduces a new API, tegra_xusb_padctl_get_port_number,
> to the Tegra XUSB Pad Controller driver. This API is used to identify
> the USB port that is associated with a given PHY.
> 
> The function takes a PHY pointer for either a USB2 PHY or USB3 PHY as input
> and returns the corresponding port number. If the PHY pointer is invalid,
> it returns -ENODEV.

Acked-by: Vinod Koul <vkoul@kernel.org>
diff mbox series

Patch

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 142ebe0247cc..983a6e6173bd 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -1531,6 +1531,19 @@  int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
 }
 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
 
+int tegra_xusb_padctl_get_port_number(struct phy *phy)
+{
+	struct tegra_xusb_lane *lane;
+
+	if (!phy)
+		return -ENODEV;
+
+	lane = phy_get_drvdata(phy);
+
+	return lane->index;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_port_number);
+
 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
 MODULE_LICENSE("GPL v2");
diff --git a/include/linux/phy/tegra/xusb.h b/include/linux/phy/tegra/xusb.h
index 70998e6dd6fd..6ca51e0080ec 100644
--- a/include/linux/phy/tegra/xusb.h
+++ b/include/linux/phy/tegra/xusb.h
@@ -26,6 +26,7 @@  void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy);
 int tegra_phy_xusb_utmi_port_reset(struct phy *phy);
 int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
 					 unsigned int port);
+int tegra_xusb_padctl_get_port_number(struct phy *phy);
 int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
 					   enum usb_device_speed speed);
 int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy);