SBC-FITPC2 watchdog driver fix

Denis Turischev
2010-01-21T14:08:56Z

sbc_fitpc2_wdt: fix I/O space access technique.

The mdelay function was used between I/O access commands, that causes peak
in CPU usage. Fix it by substitution mdelay to msleep.

Expand usage on fitPC2 compatible boards according to DMI identification.

Signed-off-by: Denis Turischev <denis@compulab.co.il>

diff -Nru linux-2.6.33-rc4.orig/drivers/watchdog/Kconfig linux-2.6.33-rc4/drivers/watchdog/Kconfig
--- linux-2.6.33-rc4.orig/drivers/watchdog/Kconfig 2010-01-13 07:15:00.000000000 +0200
+++ linux-2.6.33-rc4/drivers/watchdog/Kconfig 2010-01-20 13:47:18.000000000 +0200
@@ -396,8 +396,8 @@
tristate "Compulab SBC-FITPC2 watchdog"
depends on X86
---help---
- This is the driver for the built-in watchdog timer on the fit-PC2
- Single-board computer made by Compulab.
+ This is the driver for the built-in watchdog timer on the fit-PC2,
+ fit-PC2i, CM-iAM single-board computers made by Compulab.

It`s possible to enable watchdog timer either from BIOS (F2) or from booted Linux.
When "Watchdog Timer Value" enabled one can set 31-255 s operational range.
diff -Nru linux-2.6.33-rc4.orig/drivers/watchdog/sbc_fitpc2_wdt.c linux-2.6.33-rc4/drivers/watchdog/sbc_fitpc2_wdt.c
--- linux-2.6.33-rc4.orig/drivers/watchdog/sbc_fitpc2_wdt.c 2010-01-13 07:15:00.000000000 +0200
+++ linux-2.6.33-rc4/drivers/watchdog/sbc_fitpc2_wdt.c 2010-01-20 15:28:19.000000000 +0200
@@ -46,9 +46,9 @@
static void wdt_send_data(unsigned char command, unsigned char data)
{
outb(command, COMMAND_PORT);
- mdelay(100);
+ msleep(100);
outb(data, DATA_PORT);
- mdelay(200);
+ msleep(200);
}

static void wdt_enable(void)
@@ -202,11 +202,10 @@
{
int err;

- if (strcmp("SBC-FITPC2", dmi_get_system_info(DMI_BOARD_NAME))) {
- pr_info("board name is: %s. Should be SBC-FITPC2\n",
- dmi_get_system_info(DMI_BOARD_NAME));
+ if (!strstr(dmi_get_system_info(DMI_BOARD_NAME), "SBC-FITPC2"))
return -ENODEV;
- }
+
+ pr_info("%s found\n", dmi_get_system_info(DMI_BOARD_NAME));

if (!request_region(COMMAND_PORT, 1, WATCHDOG_NAME)) {
pr_err("I/O address 0x%04x already in use\n", COMMAND_PORT);