USB: MUSB: Let board specific code handle clock initialization

Instead of clk_get() in omap2430.c driver, we can let
musb_core.c do it by setting the clock id in
musb_platform_data structure.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-2430sdp-usb.c

@@ -13,9 +13,11 @@
 #include <linux/errno.h>
 #include <linux/delay.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 #include <linux/usb/musb.h>
 
 #include <asm/arch/hardware.h>
+#include <asm/arch/pm.h>
 #include <asm/arch/usb.h>
 
 static struct resource musb_resources[] = {
@@ -34,6 +36,29 @@ static struct resource musb_resources[] = {
 	},
 };
 
+static int usbhs_ick_on;
+
+static int musb_set_clock(struct clk *clk, int state)
+{
+       if (state) {
+               if (usbhs_ick_on > 0)
+                       return -ENODEV;
+
+               omap2_block_sleep();
+               clk_enable(clk);
+               usbhs_ick_on = 1;
+       } else {
+               if (usbhs_ick_on == 0)
+                       return -ENODEV;
+
+               clk_disable(clk);
+               usbhs_ick_on = 0;
+               omap2_allow_sleep();
+       }
+
+       return 0;
+}
+
 static struct musb_hdrc_platform_data musb_plat = {
 #ifdef CONFIG_USB_MUSB_OTG
 	.mode		= MUSB_OTG,
@@ -43,6 +68,8 @@ static struct musb_hdrc_platform_data musb_plat = {
 	.mode		= MUSB_PERIPHERAL,
 #endif
 	.multipoint	= 1,
+	.clock		= "usbhs_ick",
+	.set_clock	= musb_set_clock,
 };
 
 static u64 musb_dmamask = ~(u32)0;

arch/arm/mach-omap2/board-3430sdp-usb.c

@@ -16,11 +16,13 @@
 #include <linux/errno.h>
 #include <linux/delay.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 #include <asm/io.h>
 #include <asm/arch/mux.h>
 #include <linux/usb/musb.h>
 
 #include <asm/arch/hardware.h>
+#include <asm/arch/pm.h>
 #include <asm/arch/usb.h>
 
 #ifdef CONFIG_USB_MUSB_SOC
@@ -40,6 +42,29 @@ static struct resource musb_resources[] = {
 	},
 };
 
+static int hsotgusb_ick_on;
+
+static int musb_set_clock(struct clk *clk, int state)
+{
+	if (state) {
+		if (hsotgusb_ick_on > 0)
+			return -ENODEV;
+
+		omap2_block_sleep();
+		clk_enable(clk);
+		hsotgusb_ick_on = 1;
+	} else {
+		if (hsotgusb_ick_on == 0)
+			return -ENODEV;
+
+		clk_disable(clk);
+		hsotgusb_ick_on = 0;
+		omap2_allow_sleep();
+	}
+
+	return 0;
+}
+
 static struct musb_hdrc_platform_data musb_plat = {
 #ifdef CONFIG_USB_MUSB_OTG
 	.mode		= MUSB_OTG,
@@ -49,8 +74,8 @@ static struct musb_hdrc_platform_data musb_plat = {
 	.mode		= MUSB_PERIPHERAL,
 #endif
 	.multipoint	= 1,
-	.clock		= NULL,
-	.set_clock	= NULL,
+	.clock		= "hsotgusb_ick",
+	.set_clock	= musb_set_clock,
 };
 
 static u64 musb_dmamask = ~(u32)0;

drivers/usb/musb/omap2430.c

@@ -219,13 +219,7 @@ int __init musb_platform_init(struct musb *musb)
 
 #if defined(CONFIG_ARCH_OMAP2430)
 	omap_cfg_reg(AE5_2430_USB0HS_STP);
-	/* get the clock */
-	musb->clock = clk_get((struct device *)musb->controller, "usbhs_ick");
-#else
-	musb->clock = clk_get((struct device *)musb->controller, "hsotgusb_ick");
 #endif
-	if(IS_ERR(musb->clock))
-		return PTR_ERR(musb->clock);
 
 	musb->xceiv = *xceiv;
 	musb_platform_resume(musb);
@@ -261,13 +255,11 @@ int musb_platform_suspend(struct musb *musb)
 	OTG_SYSCONFIG_REG |= AUTOIDLE;		/* enable auto idle */
 
 	musb->xceiv.set_suspend(&musb->xceiv, 1);
-	clk_disable(musb->clock);
 	return 0;
 }
 
 int musb_platform_resume(struct musb *musb)
 {
-	clk_enable(musb->clock);
 	musb->xceiv.set_suspend(&musb->xceiv, 0);
 
 	OTG_FORCESTDBY_REG &= ~ENABLEFORCE; /* disable MSTANDBY */