diff options
| author | Bernhard Walle <bwalle@suse.de> | 2008-01-30 13:33:31 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:31 +0100 |
| commit | f8f76481bc2803aea03ff213c7e1405b53f7e488 (patch) | |
| tree | 5356ad1b63ed7b2e36c57102bbac3a1ce44427b9 | |
| parent | 1bdbdaacf774f2979ed4cb0c4a4316c9e578c897 (diff) | |
| download | talos-op-linux-f8f76481bc2803aea03ff213c7e1405b53f7e488.tar.gz talos-op-linux-f8f76481bc2803aea03ff213c7e1405b53f7e488.zip | |
rtc: use the IRQ callback interface in (old) RTC driver
the previous patch in the old RTC driver. It also removes the direct
rtc_interrupt() call from arch/x86/kernel/hpetc.c so that there's finally no
(code) dependency to CONFIG_RTC in arch/x86/kernel/hpet.c.
Because of this, it's possible to compile the drivers/char/rtc.ko driver as
module and still use the HPET emulation functionality. This is also expressed
in Kconfig.
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Robert Picco <Robert.Picco@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/Kconfig | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/hpet.c | 2 | ||||
| -rw-r--r-- | drivers/char/rtc.c | 15 |
3 files changed, 15 insertions, 4 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 81af31e5a9f1..4e911d0a4962 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -390,7 +390,7 @@ config HPET_TIMER config HPET_EMULATE_RTC def_bool y - depends on HPET_TIMER && RTC=y + depends on HPET_TIMER && (RTC=y || RTC=m) # Mark as embedded because too many people got it wrong. # The code disables itself when not needed. diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index d65ced59a18f..429d084e014d 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -705,8 +705,6 @@ irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id) rtc_int_flag |= (RTC_IRQF | (RTC_NUM_INTS << 8)); if (irq_handler) irq_handler(rtc_int_flag, dev_id); - - rtc_interrupt(rtc_int_flag, dev_id); } return IRQ_HANDLED; } diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c index 3ac7952fe086..78b151c4d20f 100644 --- a/drivers/char/rtc.c +++ b/drivers/char/rtc.c @@ -110,6 +110,8 @@ static int rtc_has_irq = 1; #define hpet_set_rtc_irq_bit(arg) 0 #define hpet_rtc_timer_init() do { } while (0) #define hpet_rtc_dropped_irq() 0 +#define hpet_register_irq_handler(h) 0 +#define hpet_unregister_irq_handler(h) 0 #ifdef RTC_IRQ static irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id) { @@ -1027,7 +1029,15 @@ no_irq: #ifdef RTC_IRQ if (is_hpet_enabled()) { + int err; + rtc_int_handler_ptr = hpet_rtc_interrupt; + err = hpet_register_irq_handler(rtc_interrupt); + if (err != 0) { + printk(KERN_WARNING "hpet_register_irq_handler failed " + "in rtc_init()."); + return err; + } } else { rtc_int_handler_ptr = rtc_interrupt; } @@ -1050,6 +1060,7 @@ no_irq: if (misc_register(&rtc_dev)) { #ifdef RTC_IRQ free_irq(RTC_IRQ, NULL); + hpet_unregister_irq_handler(rtc_interrupt); rtc_has_irq = 0; #endif rtc_release_region(); @@ -1141,8 +1152,10 @@ static void __exit rtc_exit(void) #else rtc_release_region(); #ifdef RTC_IRQ - if (rtc_has_irq) + if (rtc_has_irq) { free_irq(RTC_IRQ, NULL); + hpet_unregister_irq_handler(hpet_rtc_interrupt); + } #endif #endif /* CONFIG_SPARC32 */ } |
