Added a new PHY mode to support OTG.
Obtained Tegra USB PHY mode using DT property.
Signed-off-by: Venu Byravarasu <vbyravarasu@xxxxxxxxxx>
---
delta from v1:
replaced gadget with peripheral.
drivers/usb/host/ehci-tegra.c | 3 +--
drivers/usb/phy/phy-tegra-usb.c | 13 +++++++++++--
include/linux/usb/tegra_usb_phy.h | 3 ++-
3 files changed, 14 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 1d2488c..afe9629 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -732,8 +732,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
}
tegra->phy = tegra_usb_phy_open(&pdev->dev, instance, hcd->regs,
- pdata->phy_config,
- TEGRA_USB_PHY_MODE_HOST);
+ pdata->phy_config);
if (IS_ERR(tegra->phy)) {
dev_err(&pdev->dev, "Failed to open USB phy\n");
err = -ENXIO;
diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c
index 5487d38..91b6e29 100644
--- a/drivers/usb/phy/phy-tegra-usb.c
+++ b/drivers/usb/phy/phy-tegra-usb.c
@@ -688,7 +688,7 @@ static int tegra_usb_phy_suspend(struct usb_phy *x, int suspend)
}
struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
- void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode)
+ void __iomem *regs, void *config)
{
struct tegra_usb_phy *phy;
unsigned long parent_rate;
@@ -703,7 +703,6 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
phy->instance = instance;
phy->regs = regs;
phy->config = config;
- phy->mode = phy_mode;
phy->dev = dev;
phy->is_legacy_phy =
of_property_read_bool(np, "nvidia,has-legacy-mode");
@@ -713,6 +712,16 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
else
phy->is_ulpi_phy = true;
+ err = of_property_match_string(np, "dr_mode", "otg");
+ if (err < 0) {
+ err = of_property_match_string(np, "dr_mode", "peripheral");
+ if (err < 0)
+ phy->mode = TEGRA_USB_PHY_MODE_HOST;
+ else
+ phy->mode = TEGRA_USB_PHY_MODE_DEVICE;
+ } else
+ phy->mode = TEGRA_USB_PHY_MODE_OTG;
+
if (!phy->config) {
if (phy->is_ulpi_phy) {
pr_err("%s: ulpi phy configuration missing", __func__);
diff --git a/include/linux/usb/tegra_usb_phy.h b/include/linux/usb/tegra_usb_phy.h
index 9ebebe9..a7af923 100644
--- a/include/linux/usb/tegra_usb_phy.h
+++ b/include/linux/usb/tegra_usb_phy.h
@@ -42,6 +42,7 @@ enum tegra_usb_phy_port_speed {
enum tegra_usb_phy_mode {
TEGRA_USB_PHY_MODE_DEVICE,
TEGRA_USB_PHY_MODE_HOST,
+ TEGRA_USB_PHY_MODE_OTG,
};
struct tegra_xtal_freq;
@@ -64,7 +65,7 @@ struct tegra_usb_phy {
};
struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
- void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode);
+ void __iomem *regs, void *config);
void tegra_usb_phy_preresume(struct usb_phy *phy);
--
1.7.0.4
--
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