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

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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@xxxxxxxxxxxxxxx
Signed-off-by: Wayne Chang <waynec@xxxxxxxxxx>
---
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@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 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@xxxxxxxxxx>
Tested-by: Jon Hunter <jonathanh@xxxxxxxxxx>

Thanks!

Jon

--
nvpublic




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