usb: phy: tegra: Remove unused functions

tegra_ehci_phy_restore_start() and tegra_ehci_phy_restore_end()
last use was removed in 2013 by
commit a4faa54e3aa2 ("USB: EHCI: tegra: remove all power management")

tegra_usb_phy_preresume() and tegra_usb_phy_postresume() last
use was removed in 2020 by
commit c3590c7656fb ("usb: host: ehci-tegra: Remove the driver")
(Although that one makes me wonder how much of the rest of the file
is actually used)

Remove both sets.

Signed-off-by: "Dr. David Alan Gilbert" <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/phy/phy-tegra-usb.c

···
 	return utmip_pad_power_off(phy);
 }
 
-static void utmi_phy_preresume(struct tegra_usb_phy *phy)
-{
-	void __iomem *base = phy->regs;
-	u32 val;
-
-	val = readl_relaxed(base + UTMIP_TX_CFG0);
-	val |= UTMIP_HS_DISCON_DISABLE;
-	writel_relaxed(val, base + UTMIP_TX_CFG0);
-}
-
-static void utmi_phy_postresume(struct tegra_usb_phy *phy)
-{
-	void __iomem *base = phy->regs;
-	u32 val;
-
-	val = readl_relaxed(base + UTMIP_TX_CFG0);
-	val &= ~UTMIP_HS_DISCON_DISABLE;
-	writel_relaxed(val, base + UTMIP_TX_CFG0);
-}
-
-static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
-				   enum tegra_usb_phy_port_speed port_speed)
-{
-	void __iomem *base = phy->regs;
-	u32 val;
-
-	val = readl_relaxed(base + UTMIP_MISC_CFG0);
-	val &= ~UTMIP_DPDM_OBSERVE_SEL(~0);
-	if (port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
-		val |= UTMIP_DPDM_OBSERVE_SEL_FS_K;
-	else
-		val |= UTMIP_DPDM_OBSERVE_SEL_FS_J;
-	writel_relaxed(val, base + UTMIP_MISC_CFG0);
-	usleep_range(1, 10);
-
-	val = readl_relaxed(base + UTMIP_MISC_CFG0);
-	val |= UTMIP_DPDM_OBSERVE;
-	writel_relaxed(val, base + UTMIP_MISC_CFG0);
-	usleep_range(10, 100);
-}
-
-static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
-{
-	void __iomem *base = phy->regs;
-	u32 val;
-
-	val = readl_relaxed(base + UTMIP_MISC_CFG0);
-	val &= ~UTMIP_DPDM_OBSERVE;
-	writel_relaxed(val, base + UTMIP_MISC_CFG0);
-	usleep_range(10, 100);
-}
-
 static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
 {
 	void __iomem *base = phy->regs;
···
 
 	return err;
 }
-
-void tegra_usb_phy_preresume(struct usb_phy *u_phy)
-{
-	struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
-
-	if (!phy->is_ulpi_phy)
-		utmi_phy_preresume(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
-
-void tegra_usb_phy_postresume(struct usb_phy *u_phy)
-{
-	struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
-
-	if (!phy->is_ulpi_phy)
-		utmi_phy_postresume(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
-
-void tegra_ehci_phy_restore_start(struct usb_phy *u_phy,
-				  enum tegra_usb_phy_port_speed port_speed)
-{
-	struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
-
-	if (!phy->is_ulpi_phy)
-		utmi_phy_restore_start(phy, port_speed);
-}
-EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
-
-void tegra_ehci_phy_restore_end(struct usb_phy *u_phy)
-{
-	struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
-
-	if (!phy->is_ulpi_phy)
-		utmi_phy_restore_end(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
 
 static int read_utmi_param(struct platform_device *pdev, const char *param,
 			   u8 *dest)

include/linux/usb/tegra_usb_phy.h

···
 	bool powered_on;
 };
 
-void tegra_usb_phy_preresume(struct usb_phy *phy);
-
-void tegra_usb_phy_postresume(struct usb_phy *phy);
-
-void tegra_ehci_phy_restore_start(struct usb_phy *phy,
-				 enum tegra_usb_phy_port_speed port_speed);
-
-void tegra_ehci_phy_restore_end(struct usb_phy *phy);
-
 #endif /* __TEGRA_USB_PHY_H */