[ARM PATCH] 2240/1: S3C2410 - clock device id update

Patch from Ben Dooks

Clock code now uses the supplied device to check for
the id of the clock, so uart clocks are now simply
"uart" instead of "uart0", "uart1" and "uart2"

Signed-off-by: Ben Dooks
Signed-off-by: Russell King

arch/arm/mach-s3c2410/clock.c

@@ -32,6 +32,7 @@
 #include <linux/list.h>
 #include <linux/errno.h>
 #include <linux/err.h>
+#include <linux/device.h>
 
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
@@ -99,17 +100,35 @@ struct clk *clk_get(struct device *dev, const char *id)
 {
 	struct clk *p;
 	struct clk *clk = ERR_PTR(-ENOENT);
+	int idno;
+
+	idno = (dev == NULL) ? -1 : to_platform_device(dev)->id;
 
 	down(&clocks_sem);
+
 	list_for_each_entry(p, &clocks, list) {
-		if (strcmp(id, p->name) == 0 &&
+		if (p->id == idno &&
+		    strcmp(id, p->name) == 0 &&
 		    try_module_get(p->owner)) {
 			clk = p;
 			break;
 		}
 	}
-	up(&clocks_sem);
 
+	/* check for the case where a device was supplied, but the
+	 * clock that was being searched for is not device specific */
+
+	if (IS_ERR(clk)) {
+		list_for_each_entry(p, &clocks, list) {
+			if (p->id == -1 && strcmp(id, p->name) == 0 &&
+			    try_module_get(p->owner)) {
+				clk = p;
+				break;
+			}
+		}
+	}
+
+	up(&clocks_sem);
 	return clk;
 }
 
@@ -147,6 +166,9 @@ void clk_unuse(struct clk *clk)
 
 unsigned long clk_get_rate(struct clk *clk)
 {
+	if (IS_ERR(clk))
+		return 0;
+
 	if (clk->rate != 0)
 		return clk->rate;
 
@@ -186,45 +208,53 @@ EXPORT_SYMBOL(clk_get_parent);
 
 static struct clk clk_f = {
 	.name		= "fclk",
+	.id		= -1,
 	.rate		= 0,
 	.parent		= NULL,
-	.ctrlbit       = 0
+	.ctrlbit	= 0,
 };
 
 static struct clk clk_h = {
 	.name		= "hclk",
+	.id		= -1,
 	.rate		= 0,
 	.parent		= NULL,
-	.ctrlbit       = 0
+	.ctrlbit	= 0,
 };
 
 static struct clk clk_p = {
 	.name		= "pclk",
+	.id		= -1,
 	.rate		= 0,
 	.parent		= NULL,
-	.ctrlbit       = 0
+	.ctrlbit	= 0,
 };
 
 /* clocks that could be registered by external code */
 
 struct clk s3c24xx_dclk0 = {
 	.name		= "dclk0",
+	.id		= -1,
 };
 
 struct clk s3c24xx_dclk1 = {
 	.name		= "dclk1",
+	.id		= -1,
 };
 
 struct clk s3c24xx_clkout0 = {
 	.name		= "clkout1",
+	.id		= -1,
 };
 
 struct clk s3c24xx_clkout1 = {
 	.name		= "clkout1",
+	.id		= -1,
 };
 
 struct clk s3c24xx_uclk = {
 	.name		= "uclk",
+	.id		= -1,
 };
 
 
@@ -232,21 +262,25 @@ struct clk s3c24xx_uclk = {
 
 static struct clk init_clocks[] = {
 	{ .name    = "nand",
+	  .id	   = -1,
 	  .parent  = &clk_h,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_NAND
 	},
 	{ .name    = "lcd",
+	  .id	   = -1,
 	  .parent  = &clk_h,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_LCDC
 	},
 	{ .name    = "usb-host",
+	  .id	   = -1,
 	  .parent  = &clk_h,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_USBH
 	},
 	{ .name    = "usb-device",
+	  .id	   = -1,
 	  .parent  = &clk_h,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_USBD
@@ -257,56 +291,67 @@ static struct clk init_clocks[] = {
 	  .ctrlbit = S3C2410_CLKCON_PWMT
 	},
 	{ .name    = "sdi",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_SDI
 	},
-	{ .name    = "uart0",
+	{ .name    = "uart",
+	  .id	   = 0,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_UART0
 	},
-	{ .name    = "uart1",
+	{ .name    = "uart",
+	  .id	   = 1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_UART1
 	},
-	{ .name    = "uart2",
+	{ .name    = "uart",
+	  .id	   = 2,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_UART2
 	},
 	{ .name    = "gpio",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_GPIO
 	},
 	{ .name    = "rtc",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_RTC
 	},
 	{ .name    = "adc",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_ADC
 	},
 	{ .name    = "i2c",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_IIC
 	},
 	{ .name    = "iis",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_IIS
 	},
 	{ .name    = "spi",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .enable  = s3c2410_clkcon_enable,
 	  .ctrlbit = S3C2410_CLKCON_SPI
 	},
 	{ .name    = "watchdog",
+	  .id	   = -1,
 	  .parent  = &clk_p,
 	  .ctrlbit = 0
 	}

arch/arm/mach-s3c2410/clock.h

@@ -14,6 +14,7 @@ struct clk {
 	struct module        *owner;
 	struct clk           *parent;
 	const char           *name;
+	int		      id;
 	atomic_t              used;
 	unsigned long         rate;
 	unsigned long         ctrlbit;