Patch "phy: tegra: xusb: Add API to retrieve the port number of phy" has been added to the 6.1-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    phy: tegra: xusb: Add API to retrieve the port number of phy

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     phy-tegra-xusb-add-api-to-retrieve-the-port-number-o.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit e8d21b4c757f51751cf49e4a498b9cf8ab35430f
Author: Wayne Chang <waynec@xxxxxxxxxx>
Date:   Thu Mar 7 11:03:27 2024 +0800

    phy: tegra: xusb: Add API to retrieve the port number of phy
    
    [ Upstream commit d843f031d9e90462253015bc0bd9e3852d206bf2 ]
    
    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@xxxxxxxxxxxxxxx
    Signed-off-by: Wayne Chang <waynec@xxxxxxxxxx>
    Reviewed-by: Jon Hunter <jonathanh@xxxxxxxxxx>
    Tested-by: Jon Hunter <jonathanh@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20240307030328.1487748-2-waynec@xxxxxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 4d5b4071d47d5..dc22b1dd2c8ba 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -1518,6 +1518,19 @@ 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@xxxxxxxxxx>");
 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 70998e6dd6fdc..6ca51e0080ec0 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);