summaryrefslogtreecommitdiff
path: root/drivers/watchdog/nv_tco.c
diff options
context:
space:
mode:
authorMart Gerrits <mart1987@gmail.com>2011-07-30 18:59:12 +0400
committerWim Van Sebroeck <wim@iguana.be>2011-08-02 12:22:54 +0400
commit6b01d30eef64456ad9e261d2173266a3244da8e1 (patch)
tree2b7c9974baf021e516ee09d9b74f215283515a5e /drivers/watchdog/nv_tco.c
parentbea1906620ce72b63f83735c4cc2642b25ec54ae (diff)
downloadlinux-6b01d30eef64456ad9e261d2173266a3244da8e1.tar.xz
watchdog: Fix POST failure on ASUS P5N32-E SLI and similar boards
At present the module does not unset the NO_REBOOT bit upon shutdown, this causes the BIOS to fail the POST once and reset. During the next boot it displays the following error message: ***** Warning: System BOOT Fail ***** Your system last boot fail or POST interrupted. Please enter setup to load default and reboot again. Press F1 to continue, DEL to enter SETUP With this patch the NO_REBOOT flag will be unset on shutdown and thus stop this failure from occurring. Tested on 'ASUS P5N32-E SLI with BIOS revision 1801' and 'ASUS P5N32-E SLI PLUS with BIOS revision 1502'. Signed-off-by: Mart Gerrits <mart1987@gmail.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/nv_tco.c')
-rw-r--r--drivers/watchdog/nv_tco.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/watchdog/nv_tco.c b/drivers/watchdog/nv_tco.c
index afa78a54711e..809f41c30c44 100644
--- a/drivers/watchdog/nv_tco.c
+++ b/drivers/watchdog/nv_tco.c
@@ -458,7 +458,15 @@ static int __devexit nv_tco_remove(struct platform_device *dev)
static void nv_tco_shutdown(struct platform_device *dev)
{
+ u32 val;
+
tco_timer_stop();
+
+ /* Some BIOSes fail the POST (once) if the NO_REBOOT flag is not
+ * unset during shutdown. */
+ pci_read_config_dword(tco_pci, MCP51_SMBUS_SETUP_B, &val);
+ val &= ~MCP51_SMBUS_SETUP_B_TCO_REBOOT;
+ pci_write_config_dword(tco_pci, MCP51_SMBUS_SETUP_B, val);
}
static struct platform_driver nv_tco_driver = {