/*
* The I/O port the PMTMR resides at.
* The location is detected during setup_arch(),
- * in arch/i386/acpi/boot.c
+ * in arch/i386/kernel/acpi/boot.c
*/
u32 pmtmr_ioport __read_mostly;
.rating = 200,
.read = acpi_pm_read,
.mask = (cycle_t)ACPI_PM_MASK,
- .mult = 0, /*to be caluclated*/
+ .mult = 0, /*to be calculated*/
.shift = 22,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
*/
static void __devinit acpi_pm_check_blacklist(struct pci_dev *dev)
{
- u8 rev;
-
if (acpi_pm_good)
return;
- pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
/* the bug has been fixed in PIIX4M */
- if (rev < 3) {
+ if (dev->revision < 3) {
printk(KERN_WARNING "* Found PM-Timer Bug on the chipset."
" Due to workarounds for a bug,\n"
"* this clock source is slow. Consider trying"
* but we still need to load before device_initcall
*/
fs_initcall(init_acpi_pm_clocksource);
+
+/*
+ * Allow an override of the IOPort. Stupid BIOSes do not tell us about
+ * the PMTimer, but we might know where it is.
+ */
+static int __init parse_pmtmr(char *arg)
+{
+ unsigned long base;
+
+ if (strict_strtoul(arg, 16, &base))
+ return -EINVAL;
+
+ printk(KERN_INFO "PMTMR IOPort override: 0x%04x -> 0x%04lx\n",
+ (unsigned int)pmtmr_ioport, base);
+ pmtmr_ioport = base;
+
+ return 1;
+}
+__setup("pmtmr=", parse_pmtmr);