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[WATCHDOG] sbc_fitpc2_wdt: fix I/O space access technique.

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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>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Denis Turischev 2010-01-21 16:10:07 +02:00 committed by Wim Van Sebroeck
parent e605d554ec
commit ef39a1bf3c
2 changed files with 7 additions and 8 deletions
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4
drivers/watchdog/Kconfig
View file

@ -396,8 +396,8 @@ config SBC_FITPC2_WATCHDOG
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.

11
drivers/watchdog/sbc_fitpc2_wdt.c
View file

@ -46,9 +46,9 @@ static DEFINE_SPINLOCK(wdt_lock);
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 @@ static int __init fitpc2_wdt_init(void)
{
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);