hwmon: PCI quirk for hwmon access on MSI MS-7031 board
The MSI MS-7031 is based on an ATI IXP300 south bridge. On this south bridge, accessible I/O ports must be enabled explicitly. Unfortunately the BIOS forgets to enable access to the hardware monitoring chip I/O ports, so hardware monitoring fails. Add a quirk enabling access to the required ports (0x295-0x296). This is exactly what MSI's own hardware monitoring application is doing, so it has to be the right way. Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
parent
c1e48dce05
commit
2958b1ec6b
|
@ -18,6 +18,7 @@
|
|||
#include <linux/hwmon.h>
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/pci.h>
|
||||
|
||||
#define HWMON_ID_PREFIX "hwmon"
|
||||
#define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d"
|
||||
|
@ -86,8 +87,36 @@ void hwmon_device_unregister(struct device *dev)
|
|||
"hwmon_device_unregister() failed: bad class ID!\n");
|
||||
}
|
||||
|
||||
static void __init hwmon_pci_quirks(void)
|
||||
{
|
||||
#if defined CONFIG_X86 && defined CONFIG_PCI
|
||||
struct pci_dev *sb;
|
||||
u16 base;
|
||||
u8 enable;
|
||||
|
||||
/* Open access to 0x295-0x296 on MSI MS-7031 */
|
||||
sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL);
|
||||
if (sb &&
|
||||
(sb->subsystem_vendor == 0x1462 && /* MSI */
|
||||
sb->subsystem_device == 0x0031)) { /* MS-7031 */
|
||||
|
||||
pci_read_config_byte(sb, 0x48, &enable);
|
||||
pci_read_config_word(sb, 0x64, &base);
|
||||
|
||||
if (base == 0 && !(enable & BIT(2))) {
|
||||
dev_info(&sb->dev,
|
||||
"Opening wide generic port at 0x295\n");
|
||||
pci_write_config_word(sb, 0x64, 0x295);
|
||||
pci_write_config_byte(sb, 0x48, enable | BIT(2));
|
||||
}
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
static int __init hwmon_init(void)
|
||||
{
|
||||
hwmon_pci_quirks();
|
||||
|
||||
hwmon_class = class_create(THIS_MODULE, "hwmon");
|
||||
if (IS_ERR(hwmon_class)) {
|
||||
printk(KERN_ERR "hwmon.c: couldn't create sysfs class\n");
|
||||
|
|
Loading…
Reference in New Issue