ARM: shmobile: r8a7778: add usb phy power control function

USB phy initialisation function is needed from not only
USB Host but also USB Function too.
This patch adds usb phy common control function.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

2 files changed, 28 insertions, 11 deletions

diff --git a/arch/arm/mach-shmobile/include/mach/r8a7778.h b/arch/arm/mach-shmobile/include/mach/r8a7778.h
index adfcf51b163d..ea1dca6880f4 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7778.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7778.h
@@ -35,4 +35,6 @@ extern void r8a7778_clock_init(void);
 extern void r8a7778_init_irq_extpin(int irlm);
 extern void r8a7778_pinmux_init(void);
 
+extern int r8a7778_usb_phy_power(bool enable);
+
 #endif /* __ASM_R8A7778_H__ */
diff --git a/arch/arm/mach-shmobile/setup-r8a7778.c b/arch/arm/mach-shmobile/setup-r8a7778.c
index 6a2657ebd197..e484d1420a01 100644
--- a/arch/arm/mach-shmobile/setup-r8a7778.c
+++ b/arch/arm/mach-shmobile/setup-r8a7778.c
@@ -95,29 +95,46 @@ static struct sh_timer_config sh_tmu1_platform_data __initdata = {
 		&sh_tmu##idx##_platform_data,		\
 		sizeof(sh_tmu##idx##_platform_data))
 
-/* USB */
-static struct usb_phy *phy;
+int r8a7778_usb_phy_power(bool enable)
+{
+	static struct usb_phy *phy = NULL;
+	int ret = 0;
+
+	if (!phy)
+		phy = usb_get_phy(USB_PHY_TYPE_USB2);
+
+	if (IS_ERR(phy)) {
+		pr_err("kernel doesn't have usb phy driver\n");
+		return PTR_ERR(phy);
+	}
+
+	if (enable)
+		ret = usb_phy_init(phy);
+	else
+		usb_phy_shutdown(phy);
 
+	return ret;
+}
+
+/* USB */
 static int usb_power_on(struct platform_device *pdev)
 {
-	if (IS_ERR(phy))
-		return PTR_ERR(phy);
+	int ret = r8a7778_usb_phy_power(true);
+
+	if (ret)
+		return ret;
 
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
-	usb_phy_init(phy);
-
 	return 0;
 }
 
 static void usb_power_off(struct platform_device *pdev)
 {
-	if (IS_ERR(phy))
+	if (r8a7778_usb_phy_power(false))
 		return;
 
-	usb_phy_shutdown(phy);
-
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 }
@@ -353,8 +370,6 @@ void __init r8a7778_add_standard_devices(void)
 
 void __init r8a7778_init_late(void)
 {
-	phy = usb_get_phy(USB_PHY_TYPE_USB2);
-
 	platform_device_register_full(&ehci_info);
 	platform_device_register_full(&ohci_info);
 }