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

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[ 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@vger.kernel.org
Signed-off-by: Wayne Chang <waynec@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20240307030328.1487748-2-waynec@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wayne Chang 2024-03-07 11:03:27 +08:00 committed by Ksawlii
parent 3824ba810b
commit 11f07f8f76
2 changed files with 15 additions and 0 deletions
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13
drivers/phy/tegra/xusb.c
View file

@ -1399,6 +1399,19 @@ int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
} }
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion); 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_AUTHOR("Thierry Reding <treding@nvidia.com>");
MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver"); MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
MODULE_LICENSE("GPL v2"); MODULE_LICENSE("GPL v2");

2
include/linux/phy/tegra/xusb.h
View file

@ -23,4 +23,6 @@ int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
int tegra_phy_xusb_utmi_port_reset(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, int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
unsigned int port); unsigned int port);
int tegra_xusb_padctl_get_port_number(struct phy *phy);
#endif /* PHY_TEGRA_XUSB_H */ #endif /* PHY_TEGRA_XUSB_H */