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authorThomas Gleixner <tglx@linutronix.de>2008-05-21 21:14:58 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-07-10 07:10:00 +0200
commit6b148507d3d042a3c11f4c3f6c0f649c6a89220d (patch)
treefb4df1223511e269cbc9cc801dcd22b0ce5f6832 /drivers/clocksource
parent543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff)
downloadlwn-6b148507d3d042a3c11f4c3f6c0f649c6a89220d.tar.gz
lwn-6b148507d3d042a3c11f4c3f6c0f649c6a89220d.zip
pmtmr: allow command line override of ioport
Stupid BIOSes do not tell us about the PMTimer, but we might know where it is. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/acpi_pm.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c
index 7b46faf22318..3baee020afc2 100644
--- a/drivers/clocksource/acpi_pm.c
+++ b/drivers/clocksource/acpi_pm.c
@@ -215,3 +215,22 @@ pm_good:
* 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%04lx -> 0x%04lx\n",
+ pmtmr_ioport, base);
+ pmtmr_ioport = base;
+
+ return 1;
+}
+__setup("pmtmr=", parse_pmtmr);