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authorNagarjuna Kristam <nkristam@nvidia.com>2020-02-10 11:11:31 +0300
committerThierry Reding <treding@nvidia.com>2020-03-19 15:59:46 +0300
commit5a40fc4b934c1d1026bc401b1def8b6455ce20f0 (patch)
treea431304aa3b69ba3396a97b3bfd58dbeec98eec3 /drivers/phy/tegra
parente8f7d2f409a15c519d5a6085777d85c1c4bab73a (diff)
downloadlinux-5a40fc4b934c1d1026bc401b1def8b6455ce20f0.tar.xz
phy: tegra: xusb: Add support to get companion USB 3 port
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 <nkristam@nvidia.com> Reviewed-by: JC Kuo <jckuo@nvidia.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/phy/tegra')
-rw-r--r--drivers/phy/tegra/xusb.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index c36d168061a1..bfca2660d676 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -1299,6 +1299,27 @@ 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");