watchdog: w83627hf: Enable watchdog only once

It is unnecessary to enable the logical device and WDT0 each time
the watchdog is accessed. Do it only once during initialization.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index ab5ec6d..910d437 100644 (file)
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -72,28 +72,10 @@ MODULE_PARM_DESC(nowayout,
 
 static void w83627hf_select_wd_register(void)
 {
-       unsigned char c;
        outb_p(0x87, WDT_EFER); /* Enter extended function mode */
        outb_p(0x87, WDT_EFER); /* Again according to manual */
-
-       outb(0x20, WDT_EFER);   /* check chip version   */
-       c = inb(WDT_EFDR);
-       if (c == 0x82) {        /* W83627THF            */
-               outb_p(0x2b, WDT_EFER); /* select GPIO3 */
-               c = ((inb_p(WDT_EFDR) & 0xf7) | 0x04); /* select WDT0 */
-               outb_p(0x2b, WDT_EFER);
-               outb_p(c, WDT_EFDR);    /* set GPIO3 to WDT0 */
-       } else if (c == 0x88 || c == 0xa0) {    /* W83627EHF / W83627DHG */
-               outb_p(0x2d, WDT_EFER); /* select GPIO5 */
-               c = inb_p(WDT_EFDR) & ~0x01; /* PIN77 -> WDT0# */
-               outb_p(0x2d, WDT_EFER);
-               outb_p(c, WDT_EFDR); /* set GPIO5 to WDT0 */
-       }
-
        outb_p(0x07, WDT_EFER); /* point to logical device number reg */
        outb_p(0x08, WDT_EFDR); /* select logical device 8 (GPIO2) */
-       outb_p(0x30, WDT_EFER); /* select CR30 */
-       outb_p(0x01, WDT_EFDR); /* set bit 0 to activate GPIO2 */
 }
 
 static void w83627hf_unselect_wd_register(void)
@@ -110,6 +92,23 @@ static void w83627hf_init(struct watchdog_device *wdog)
 
        w83627hf_select_wd_register();
 
+       outb(0x20, WDT_EFER);   /* check chip version   */
+       t = inb(WDT_EFDR);
+       if (t == 0x82) {        /* W83627THF            */
+               outb_p(0x2b, WDT_EFER); /* select GPIO3 */
+               t = ((inb_p(WDT_EFDR) & 0xf7) | 0x04); /* select WDT0 */
+               outb_p(0x2b, WDT_EFER);
+               outb_p(t, WDT_EFDR);    /* set GPIO3 to WDT0 */
+       } else if (t == 0x88 || t == 0xa0) {    /* W83627EHF / W83627DHG */
+               outb_p(0x2d, WDT_EFER); /* select GPIO5 */
+               t = inb_p(WDT_EFDR) & ~0x01; /* PIN77 -> WDT0# */
+               outb_p(0x2d, WDT_EFER);
+               outb_p(t, WDT_EFDR); /* set GPIO5 to WDT0 */
+       }
+
+       outb_p(0x30, WDT_EFER); /* select CR30 */
+       outb_p(0x01, WDT_EFDR); /* set bit 0 to activate GPIO2 */
+
        outb_p(0xF6, WDT_EFER); /* Select CRF6 */
        t = inb_p(WDT_EFDR);      /* read CRF6 */
        if (t != 0) {