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[WATCHDOG] w83697hf/hg WDT driver - patch 7

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This is patch 7 in the series of patches that converts
Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's
w83697hf/hg watchdog driver.

This patch contains following changes:
 - add w83697hf_unlock function to enter the
   chipsets extended function mode.

Signed-off-by: Samuel Tardieu <sam@rfc1149.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Samuel Tardieu 2006-09-07 11:57:00 +02:00 committed by Wim Van Sebroeck
parent de710d6871
commit f7be3328b6
1 changed files with 8 additions and 2 deletions
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10
drivers/char/watchdog/w83697hf_wdt.c
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@ -69,11 +69,17 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CON
#define W83697HF_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
#define W83697HF_EFDR (wdt_io+1) /* Extended Function Data Register */
static void
w83697hf_select_wd_register(void)
static inline void
w83697hf_unlock(void)
{
outb_p(0x87, W83697HF_EFER); /* Enter extended function mode */
outb_p(0x87, W83697HF_EFER); /* Again according to manual */
}
static void
w83697hf_select_wd_register(void)
{
w83697hf_unlock();
outb_p(0x29, W83697HF_EFER); /* select CR29 */
outb_p(0x20, W83697HF_EFDR); /* select WDTO */