[Patch V5 05/21] phy: tegra: xusb: Add support to get companion USB 3 port
From: Nagarjuna Kristam <hidden>
Date: 2020-02-10 08:14:07
Also in:
linux-tegra, linux-usb, lkml
Subsystem:
generic phy framework, tegra xusb padctl driver, the rest · Maintainers:
Vinod Koul, JC Kuo, Linus Torvalds
Tegra XUSB host, device mode driver requires the USB 3 companion port number for corresponding USB 2 port. Add API to retrieve the same. Signed-off-by: Nagarjuna Kristam <redacted> Reviewed-by: JC Kuo <jckuo@nvidia.com> Acked-by: Thierry Reding <redacted> --- V5: - No changes. --- V4: - Addressed comment from Thierry. - Added Acked-by info. --- V3: - Added Reviewed-by updates to commit message. --- V2: - Added -ENODEV as return instead of -1, to sync other errors. --- drivers/phy/tegra/xusb.c | 21 +++++++++++++++++++++ include/linux/phy/tegra/xusb.h | 2 ++ 2 files changed, 23 insertions(+)
diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 2c0e29c..a8f0a0b 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c@@ -1294,6 +1294,27 @@ int tegra_phy_xusb_utmi_port_reset(struct phy *phy) } EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset); +int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl, + unsigned int port) +{ + struct tegra_xusb_usb2_port *usb2; + struct tegra_xusb_usb3_port *usb3; + int i; + + usb2 = tegra_xusb_find_usb2_port(padctl, port); + if (!usb2) + return -EINVAL; + + for (i = 0; i < padctl->soc->ports.usb3.count; i++) { + usb3 = tegra_xusb_find_usb3_port(padctl, i); + if (usb3 && usb3->port == usb2->base.index) + return usb3->base.index; + } + + return -ENODEV; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion); + 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 1235865..71d9569 100644
--- a/include/linux/phy/tegra/xusb.h
+++ b/include/linux/phy/tegra/xusb.h@@ -21,4 +21,6 @@ int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl, int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl, bool val); 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); #endif /* PHY_TEGRA_XUSB_H */
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2.7.4