diff options
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-10-14 22:24:51 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-10-14 22:24:51 +0100 |
| commit | 7e69a8c4d06b7ecb874f571e82b715a9f79bc3c4 (patch) | |
| tree | 0248fb8f7a3e445cc3c744252abeecabb9205c05 /drivers/clocksource | |
| parent | b6825d2df55aa7d7341c715b577b73a6a03dc944 (diff) | |
| parent | d5120ae72a066b18f98e0c45ce73262f58030851 (diff) | |
Merge branch 's3c-move' into devel
Conflicts:
arch/arm/mach-versatile/core.c
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/acpi_pm.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c index 4eee533f3f4a..71d2ac4e3f46 100644 --- a/drivers/clocksource/acpi_pm.c +++ b/drivers/clocksource/acpi_pm.c @@ -178,11 +178,13 @@ static int verify_pmtmr_rate(void) /* Number of monotonicity checks to perform during initialization */ #define ACPI_PM_MONOTONICITY_CHECKS 10 +/* Number of reads we try to get two different values */ +#define ACPI_PM_READ_CHECKS 10000 static int __init init_acpi_pm_clocksource(void) { cycle_t value1, value2; - unsigned int i, j, good = 0; + unsigned int i, j = 0; if (!pmtmr_ioport) return -ENODEV; @@ -192,29 +194,26 @@ static int __init init_acpi_pm_clocksource(void) /* "verify" this timing source: */ for (j = 0; j < ACPI_PM_MONOTONICITY_CHECKS; j++) { + udelay(100 * j); value1 = clocksource_acpi_pm.read(); - for (i = 0; i < 10000; i++) { + for (i = 0; i < ACPI_PM_READ_CHECKS; i++) { value2 = clocksource_acpi_pm.read(); if (value2 == value1) continue; if (value2 > value1) - good++; break; if ((value2 < value1) && ((value2) < 0xFFF)) - good++; break; printk(KERN_INFO "PM-Timer had inconsistent results:" " 0x%#llx, 0x%#llx - aborting.\n", value1, value2); return -EINVAL; } - udelay(300 * i); - } - - if (good != ACPI_PM_MONOTONICITY_CHECKS) { - printk(KERN_INFO "PM-Timer failed consistency check " - " (0x%#llx) - aborting.\n", value1); - return -ENODEV; + if (i == ACPI_PM_READ_CHECKS) { + printk(KERN_INFO "PM-Timer failed consistency check " + " (0x%#llx) - aborting.\n", value1); + return -ENODEV; + } } if (verify_pmtmr_rate() != 0) |