Implement CONFIG_HPET_EMULATE_RTC for RTC_DRV_CMOS
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- v1 Latest3 patches 0 repliesNew
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | Make CONFIG_HPET_EMULATE_RTC usable from modulesarch/ include/ | +49 | 0 replies | |
| 2/3 | Use the IRQ callback interface in (old) RTC driverarch/ arch/ drivers/ | +15 | 0 replies | |
| 3/3 | Add HPET RTC emulation to RTC_DRV_CMOSarch/ drivers/ | +67 | 0 replies |
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Cover letter [patch 0/3] Implement CONFIG_HPET_EMULATE_RTC for RTC_DRV_CMOS
The new rtc-cmos driver misses HPET support. If the hardware has HPET enabled, then interrupts don't work for the rtc-cmos driver which results in RTC_AIE*, RTC_PIE* and RTC_ALM being unusable. This affects hwclock from util-linux-ng at least on i386 since that uses RTC_PIE_ON. (For x86-64, a polling method is used for unknown reasons.)
This patch series now
1. export the functions from arch/x86/kernel/hpet.c that the old char/rtc driver uses to work around that problem,
2. makes it possible to compile the old rtc driver as module, while still having CONFIG_HPET_EMULATE_RTC enabled and
3. makes use of the exported functions in (1) in the new rtc-cmos driver.
The design is not changed. Please review and give me feedback!
This patch series is against 2.6.24-rc5-mm1. It passes the test in Documentation/rtc.txt after http://lkml.org/lkml/2007/12/20/249 is applied.