linux-kernel - [patch 0/3] Implement CONFIG_HPET_EMULATE_RTC for RTC_DRV

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Message-Id: <20071220153935.069780745@stravinsky.suse.de>
Date:	Thu, 20 Dec 2007 16:39:35 +0100
From:	Bernhard Walle <bwalle@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	tglx@...utronix.de, clemens@...isch.de
Subject: [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.

Signed-off-by: Bernhard Walle <bwalle@...e.de>

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