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[WATCHDOG] w83697hf/hg WDT driver - patch 15 

This is patch 15 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:
 - Clean-up initialization code - part 2: 
   * the line reading "set second mode & disable keyboard ..."
     is plain wrong, the register being manipulated (CRF4) is
     the counter itself, not the control byte (CRF3) -- looks
     like it has been copied from another driver.
   * I think garbage is being written in CRF3 (the control word)
     as the timeout value is being stored in this register (such
     as 60 for 60 seconds).
   * We only want to set pin 119 to WDTO# mode and leave the rest
     of CR29 like it is.
   * Set count mode to seconds and not minutes.

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 fa69afd3c2
commit b7b9868ba6
1 changed files with 8 additions and 10 deletions
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18
drivers/char/watchdog/w83697hf_wdt.c
View File

@ -123,20 +123,18 @@ w83697hf_deselect_wdt(void)
static void
w83697hf_init(void)
{
unsigned char t;
unsigned char bbuf;
w83697hf_select_wdt();
w83697hf_set_reg(0x29, 0x20); /* Set pin 119 to WDTO# mode (= CR29, WDT0) */
bbuf = w83697hf_get_reg(0x29);
bbuf &= ~0x60;
bbuf |= 0x20;
w83697hf_set_reg(0x29, bbuf); /* Set pin 119 to WDTO# mode (= CR29, WDT0) */
t = w83697hf_get_reg(0xF3); /* Read CRF3 */
if (t != 0) {
printk (KERN_INFO PFX "Watchdog already running. Resetting timeout to %d sec\n", timeout);
w83697hf_set_reg(0xF3, timeout); /* Write new timeout */
}
t = w83697hf_get_reg(0xF4); /* Read CRF4 */
t&=~0x0C; /* set second mode & disable keyboard turning off watchdog */
w83697hf_set_reg(0xF4, t); /* Write back to CRF4 */
bbuf = w83697hf_get_reg(0xF3);
bbuf &= ~0x04;
w83697hf_set_reg(0xF3, bbuf); /* Count mode is seconds */
w83697hf_deselect_wdt();
}