usb: phy: tegra: Remove unused functions

JIRA: https://issues.redhat.com/browse/RHEL-122021

commit bc9a0c6
Author: "Dr. David Alan Gilbert" <linux@treblig.org>
Date: Tue, 3 Jun 2025 21:39:05 +0100

  tegra_ehci_phy_restore_start() and tegra_ehci_phy_restore_end()
  last use was removed in 2013 by
  commit a4faa54 ("USB: EHCI: tegra: remove all power management")

  tegra_usb_phy_preresume() and tegra_usb_phy_postresume() last
  use was removed in 2020 by
  commit c3590c7 ("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" <linux@treblig.org>
  Link: https://lore.kernel.org/r/20250603203905.279307-1-linux@treblig.org
  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Desnes Nunes <desnesn@redhat.com>

Author: Desnes Nunes

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

@@ -711,58 +711,6 @@ static int utmi_phy_power_off(struct tegra_usb_phy *phy)
 	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;
@@ -1123,43 +1071,6 @@ static int tegra_usb_phy_init(struct usb_phy *u_phy)
 	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

@@ -80,13 +80,4 @@ struct tegra_usb_phy {
 	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 */