---

yaml --- r: 17415 b: refs/heads/master c: fe38ea5 h: refs/heads/master i: 17413: fcd6d9f 17411: 29aa2b6 17407: bd354ad v: v3
git-mirror · Jan 9, 2006 · 1a18f9e · 1a18f9e
1 parent bcc3076
commit 1a18f9e
Show file tree

Hide file tree

Showing 2 changed files with 104 additions and 104 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9d4ae7276ae26c5bfba6207cf05340af1931d8d4
+refs/heads/master: fe38ea5623d262afc0b92ea47b8a7d8c988521d2
diff --git a/trunk/arch/arm/mach-s3c2410/clock.c b/trunk/arch/arm/mach-s3c2410/clock.c
@@ -253,100 +253,101 @@ struct clk s3c24xx_uclk = {
 /* clock definitions */
 
 static struct clk init_clocks[] = {
-	{ .name    = "nand",
-	  .id	   = -1,
-	  .parent  = &clk_h,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_NAND
-	},
-	{ .name    = "lcd",
-	  .id	   = -1,
-	  .parent  = &clk_h,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_LCDC
-	},
-	{ .name    = "usb-host",
-	  .id	   = -1,
-	  .parent  = &clk_h,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_USBH
-	},
-	{ .name    = "usb-device",
-	  .id	   = -1,
-	  .parent  = &clk_h,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_USBD
-	},
-	{ .name    = "timers",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_PWMT
-	},
-	{ .name    = "sdi",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_SDI
-	},
-	{ .name    = "uart",
-	  .id	   = 0,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_UART0
-	},
-	{ .name    = "uart",
-	  .id	   = 1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_UART1
-	},
-	{ .name    = "uart",
-	  .id	   = 2,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_UART2
-	},
-	{ .name    = "gpio",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_GPIO
-	},
-	{ .name    = "rtc",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_RTC
-	},
-	{ .name    = "adc",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_ADC
-	},
-	{ .name    = "i2c",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_IIC
-	},
-	{ .name    = "iis",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_IIS
-	},
-	{ .name    = "spi",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .enable  = s3c24xx_clkcon_enable,
-	  .ctrlbit = S3C2410_CLKCON_SPI
-	},
-	{ .name    = "watchdog",
-	  .id	   = -1,
-	  .parent  = &clk_p,
-	  .ctrlbit = 0
+	{
+		.name		= "nand",
+		.id		= -1,
+		.parent		= &clk_h,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_NAND,
+	}, {
+		.name		= "lcd",
+		.id		= -1,
+		.parent		= &clk_h,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_LCDC,
+	}, {
+		.name		= "usb-host",
+		.id		= -1,
+		.parent		= &clk_h,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_USBH,
+	}, {
+		.name		= "usb-device",
+		.id		= -1,
+		.parent		= &clk_h,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_USBD,
+	}, {
+		.name		= "timers",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_PWMT,
+	}, {
+		.name		= "sdi",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_SDI,
+	}, {
+		.name		= "uart",
+		.id		= 0,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_UART0,
+	}, {
+		.name		= "uart",
+		.id		= 1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_UART1,
+	}, {
+		.name		= "uart",
+		.id		= 2,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_UART2,
+	}, {
+		.name		= "gpio",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_GPIO,
+	}, {
+		.name		= "rtc",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_RTC,
+	}, {
+		.name		= "adc",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_ADC,
+	}, {
+		.name		= "i2c",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_IIC,
+	}, {
+		.name		= "iis",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_IIS,
+	}, {
+		.name		= "spi",
+		.id		= -1,
+		.parent		= &clk_p,
+		.enable		= s3c24xx_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_SPI,
+	}, {
+		.name		= "watchdog",
+		.id		= -1,
+		.parent		= &clk_p,
+		.ctrlbit	= 0,
 	}
 };
 
@@ -390,16 +391,15 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
 	clk_p.rate = pclk;
 	clk_f.rate = fclk;
 
-	/* it looks like just setting the register here is not good
-	 * enough, and causes the odd hang at initial boot time, so
-	 * do all of them indivdually.
+	/* We must be careful disabling the clocks we are not intending to
+	 * be using at boot time, as subsytems such as the LCD which do
+	 * their own DMA requests to the bus can cause the system to lockup
+	 * if they where in the middle of requesting bus access.
 	 *
-	 * I think disabling the LCD clock if the LCD is active is
-	 * very dangerous, and therefore the bootloader should be
-	 * careful to not enable the LCD clock if it is not needed.
-	 *
-	 * and of course, this looks neater
-	 */
+	 * Disabling the LCD clock if the LCD is active is very dangerous,
+	 * and therefore the bootloader should be  careful to not enable
+	 * the LCD clock if it is not needed.
+	*/
 
 	s3c24xx_clk_enable(S3C2410_CLKCON_NAND, 0);
 	s3c24xx_clk_enable(S3C2410_CLKCON_USBH, 0);