sh: sh_mobile usb clock framework support

Add clock framework support to the usb/r8a66597 driver and
adjust the cpu specific code accordingly.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

4 files changed, 40 insertions, 5 deletions

diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
index 2f0905a1b211..5f92c864d7bc 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
@@ -185,7 +185,6 @@ static int __init sh7366_devices_setup(void)
         clk_always_enable("mstp023"); /* INTC3 */
         clk_always_enable("mstp022"); /* INTC */
         clk_always_enable("mstp020"); /* SuperHyway */
-        clk_always_enable("mstp211"); /* USB */
         clk_always_enable("mstp207"); /* VEU-2 */
         clk_always_enable("mstp202"); /* VEU-1 */
         clk_always_enable("mstp201"); /* VPU */
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
index 63ec348dec70..e9c9d7ead2b3 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
@@ -240,7 +240,6 @@ static int __init sh7723_devices_setup(void)
         clk_always_enable("mstp020"); /* SuperHyway */
         clk_always_enable("mstp000"); /* MERAM */
         clk_always_enable("mstp108"); /* RTC */
-        clk_always_enable("mstp211"); /* USB */
         clk_always_enable("mstp206"); /* VEU2H1 */
         clk_always_enable("mstp202"); /* VEU2H0 */
         clk_always_enable("mstp201"); /* VPU */
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 2376f24f3c83..d99b9c7098b5 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -114,6 +114,9 @@ static int r8a66597_clock_enable(struct r8a66597 *r8a66597)
         int i = 0;
 
 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
+#if defined(CONFIG_HAVE_CLK)
+        clk_enable(r8a66597->clk);
+#endif
         do {
                 r8a66597_write(r8a66597, SCKE, SYSCFG0);
                 tmp = r8a66597_read(r8a66597, SYSCFG0);
@@ -154,7 +157,11 @@ static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
 {
         r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
         udelay(1);
-#if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
+#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
+#if defined(CONFIG_HAVE_CLK)
+        clk_disable(r8a66597->clk);
+#endif
+#else
         r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
         r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
         r8a66597_bclr(r8a66597, USBE, SYSCFG0);
@@ -2261,6 +2268,9 @@ static int __init_or_module r8a66597_remove(struct platform_device *pdev)
         del_timer_sync(&r8a66597->rh_timer);
         usb_remove_hcd(hcd);
         iounmap((void *)r8a66597->reg);
+#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+        clk_put(r8a66597->clk);
+#endif
         usb_put_hcd(hcd);
         return 0;
 }
@@ -2268,6 +2278,9 @@ static int __init_or_module r8a66597_remove(struct platform_device *pdev)
 #define resource_len(r) (((r)->end - (r)->start) + 1)
 static int __init r8a66597_probe(struct platform_device *pdev)
 {
+#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+        char clk_name[8];
+#endif
         struct resource *res = NULL, *ires;
         int irq = -1;
         void __iomem *reg = NULL;
@@ -2320,6 +2333,16 @@ static int __init r8a66597_probe(struct platform_device *pdev)
         memset(r8a66597, 0, sizeof(struct r8a66597));
         dev_set_drvdata(&pdev->dev, r8a66597);
 
+#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+        snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
+        r8a66597->clk = clk_get(&pdev->dev, clk_name);
+        if (IS_ERR(r8a66597->clk)) {
+                dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+                ret = PTR_ERR(r8a66597->clk);
+                goto clean_up2;
+        }
+#endif
+
         spin_lock_init(&r8a66597->lock);
         init_timer(&r8a66597->rh_timer);
         r8a66597->rh_timer.function = r8a66597_timer;
@@ -2365,11 +2388,19 @@ static int __init r8a66597_probe(struct platform_device *pdev)
         ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | irq_trigger);
         if (ret != 0) {
                 dev_err(&pdev->dev, "Failed to add hcd\n");
-                goto clean_up;
+                goto clean_up3;
         }
 
         return 0;
 
+clean_up3:
+#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+        clk_put(r8a66597->clk);
+#endif
+
+clean_up2:
+        usb_put_hcd(hcd);
+
 clean_up:
         if (reg)
                 iounmap(reg);
diff --git a/drivers/usb/host/r8a66597.h b/drivers/usb/host/r8a66597.h
index 84ee01417315..ecacde4d69b0 100644
--- a/drivers/usb/host/r8a66597.h
+++ b/drivers/usb/host/r8a66597.h
@@ -26,6 +26,10 @@
 #ifndef __R8A66597_H__
 #define __R8A66597_H__
 
+#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+#include <linux/clk.h>
+#endif
+
 #define SYSCFG0         0x00
 #define SYSCFG1         0x02
 #define SYSSTS0         0x04
@@ -481,7 +485,9 @@ struct r8a66597_root_hub {
 struct r8a66597 {
         spinlock_t lock;
         unsigned long reg;
-
+#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+        struct clk *clk;
+#endif
         struct r8a66597_device          device0;
         struct r8a66597_root_hub        root_hub[R8A66597_MAX_ROOT_HUB];
         struct list_head                pipe_queue[R8A66597_MAX_NUM_PIPE];