phy: tegra: xusb: Add Tegra186 support

Add support for the XUSB pad controller found on Tegra186 SoCs. It is
mostly similar to the same IP found on earlier chips, but the number of
pads exposed differs, as do the programming sequences.

Note that the DVDD_PEX, DVDD_PEX_PLL, HVDD_PEX and HVDD_PEX_PLL power
supplies of the XUSB pad controller require strict power sequencing and
are therefore controlled by the PMIC on Tegra186.
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
[dan.carpenter@oracle.com: Fix testing the wrong variable in probe()]
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[yuehaibing@huawei.com: Make two functions static to fix sparse warning]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

MAINTAINERS

@@ -15304,6 +15304,11 @@ M:	Laxman Dewangan <ldewangan@nvidia.com>
 S:	Supported
 F:	drivers/spi/spi-tegra*
 
+TEGRA XUSB PADCTL DRIVER
+M:	JC Kuo <jckuo@nvidia.com>
+S:	Supported
+F:	drivers/phy/tegra/xusb*
+
 TEHUTI ETHERNET DRIVER
 M:	Andy Gospodarek <andy@greyhouse.net>
 L:	netdev@vger.kernel.org

drivers/phy/tegra/Makefile

@@ -4,3 +4,4 @@ phy-tegra-xusb-y += xusb.o
 phy-tegra-xusb-$(CONFIG_ARCH_TEGRA_124_SOC) += xusb-tegra124.o
 phy-tegra-xusb-$(CONFIG_ARCH_TEGRA_132_SOC) += xusb-tegra124.o
 phy-tegra-xusb-$(CONFIG_ARCH_TEGRA_210_SOC) += xusb-tegra210.o
+phy-tegra-xusb-$(CONFIG_ARCH_TEGRA_186_SOC) += xusb-tegra186.o

drivers/phy/tegra/xusb.c

@@ -67,6 +67,12 @@ static const struct of_device_id tegra_xusb_padctl_of_match[] = {
 		.compatible = "nvidia,tegra210-xusb-padctl",
 		.data = &tegra210_xusb_padctl_soc,
 	},
+#endif
+#if defined(CONFIG_ARCH_TEGRA_186_SOC)
+	{
+		.compatible = "nvidia,tegra186-xusb-padctl",
+		.data = &tegra186_xusb_padctl_soc,
+	},
 #endif
 	{ }
 };

drivers/phy/tegra/xusb.h

@@ -56,10 +56,21 @@ struct tegra_xusb_lane {
 int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
 			     struct device_node *np);
 
+struct tegra_xusb_usb3_lane {
+	struct tegra_xusb_lane base;
+};
+
+static inline struct tegra_xusb_usb3_lane *
+to_usb3_lane(struct tegra_xusb_lane *lane)
+{
+	return container_of(lane, struct tegra_xusb_usb3_lane, base);
+}
+
 struct tegra_xusb_usb2_lane {
 	struct tegra_xusb_lane base;
 
 	u32 hs_curr_level_offset;
+	bool powered_on;
 };
 
 static inline struct tegra_xusb_usb2_lane *
@@ -170,6 +181,19 @@ int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
 			    const struct phy_ops *ops);
 void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad);
 
+struct tegra_xusb_usb3_pad {
+	struct tegra_xusb_pad base;
+
+	unsigned int enable;
+	struct mutex lock;
+};
+
+static inline struct tegra_xusb_usb3_pad *
+to_usb3_pad(struct tegra_xusb_pad *pad)
+{
+	return container_of(pad, struct tegra_xusb_usb3_pad, base);
+}
+
 struct tegra_xusb_usb2_pad {
 	struct tegra_xusb_pad base;
 
@@ -425,5 +449,8 @@ extern const struct tegra_xusb_padctl_soc tegra124_xusb_padctl_soc;
 #if defined(CONFIG_ARCH_TEGRA_210_SOC)
 extern const struct tegra_xusb_padctl_soc tegra210_xusb_padctl_soc;
 #endif
+#if defined(CONFIG_ARCH_TEGRA_186_SOC)
+extern const struct tegra_xusb_padctl_soc tegra186_xusb_padctl_soc;
+#endif
 
 #endif /* __PHY_TEGRA_XUSB_H */