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booke/watchdog: refine and clean up the codes

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Basically, this patch does the following:
1. Move the codes of parsing boot parameters from setup-common.c
   to driver. In this way, code reader can know directly that
   there are boot parameters that can change the timeout.
2. Make boot parameter 'booke_wdt_period' effective.
   currently, when driver is loaded, default timeout is always
   being used in stead of booke_wdt_period.
3. Wrap up the watchdog timeout in device struct and clean up
   unnecessary codes.

Signed-off-by: Tang Yuantian <yuantian.tang@freescale.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: Li Yang <leoli@freescale.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Tang Yuantian
2014-05-08 10:04:26 +08:00
committed by Wim Van Sebroeck
parent ec2e32ca66
commit d2deebabae
2 changed files with 34 additions and 46 deletions
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27
arch/powerpc/kernel/setup-common.c
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@@ -718,33 +718,6 @@ static int powerpc_debugfs_init(void)
arch_initcall(powerpc_debugfs_init);
#endif
#ifdef CONFIG_BOOKE_WDT
extern u32 booke_wdt_enabled;
extern u32 booke_wdt_period;
/* Checks wdt=x and wdt_period=xx command-line option */
notrace int __init early_parse_wdt(char *p)
{
if (p && strncmp(p, "0", 1) != 0)
booke_wdt_enabled = 1;
return 0;
}
early_param("wdt", early_parse_wdt);
int __init early_parse_wdt_period(char *p)
{
unsigned long ret;
if (p) {
if (!kstrtol(p, 0, &ret))
booke_wdt_period = ret;
}
return 0;
}
early_param("wdt_period", early_parse_wdt_period);
#endif /* CONFIG_BOOKE_WDT */
void ppc_printk_progress(char *s, unsigned short hex)
{
pr_info("%s\n", s);