From d652074ebcedd13c7ce760c7f3327f30862852fb Mon Sep 17 00:00:00 2001
From: Ben Dooks <ben-linux@fluff.org>
Date: Sun, 23 Dec 2007 03:09:31 +0100
Subject: [ARM] 4721/1: S3C24XX: Ensure watchdog clock is enbaled for hard
reset
If the hard reset routine is using the watchdog, then
ensure that the clock for the watchdog has been enabled
before we try and issue a reset.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
include/asm-arm/arch-s3c2410/system.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/asm-arm/arch-s3c2410/system.h b/include/asm-arm/arch-s3c2410/system.h
index 6389178..cb9cd9f 100644
--- a/include/asm-arm/arch-s3c2410/system.h
+++ b/include/asm-arm/arch-s3c2410/system.h
@@ -20,6 +20,9 @@
#include <asm/plat-s3c/regs-watchdog.h>
#include <asm/arch/regs-clock.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
void (*s3c24xx_idle)(void);
void (*s3c24xx_reset_hook)(void);
@@ -59,6 +62,8 @@ static void arch_idle(void)
static void
arch_reset(char mode)
{
+ struct clk *wdtclk;
+
if (mode == 's') {
cpu_reset(0);
}
@@ -70,6 +75,12 @@ arch_reset(char mode)
__raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */
+ wdtclk = clk_get(NULL, "watchdog");
+ if (!IS_ERR(wdtclk)) {
+ clk_enable(wdtclk);
+ } else
+ printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);
+
/* put initial values into count and data */
__raw_writel(0x100, S3C2410_WTCNT);
__raw_writel(0x100, S3C2410_WTDAT);
--
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