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authorThomas Gleixner <tglx@linutronix.de>2019-06-23 15:24:00 +0200
committerThomas Gleixner <tglx@linutronix.de>2019-06-28 00:57:23 +0200
commit9e16e4933e48819a259b8967e72e5765349953b1 (patch)
treefa3287447b03a425365324ca311739f3e2a4a0b9 /arch/x86/kernel/hpet.c
parent2460d5878ad69c178f9ff1cc3eee9f09b017e15f (diff)
downloadlinux-9e16e4933e48819a259b8967e72e5765349953b1.tar.bz2
x86/hpet: Add mode information to struct hpet_channel
The usage of the individual HPET channels is not tracked in a central place. The information is scattered in different data structures. Also the HPET reservation in the HPET character device is split out into several places which makes the code hard to follow. Assigning a mode to the channel allows to consolidate the reservation code and paves the way for further simplifications. As a first step set the mode of the legacy channels when the HPET is in legacy mode. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> Cc: Ashok Raj <ashok.raj@intel.com> Cc: Andi Kleen <andi.kleen@intel.com> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Stephane Eranian <eranian@google.com> Cc: Ravi Shankar <ravi.v.shankar@intel.com> Link: https://lkml.kernel.org/r/20190623132435.911652981@linutronix.de
Diffstat (limited to 'arch/x86/kernel/hpet.c')
-rw-r--r--arch/x86/kernel/hpet.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 8711f1fdef8f..3a8ec363d569 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -22,9 +22,17 @@ struct hpet_dev {
char name[10];
};
+enum hpet_mode {
+ HPET_MODE_UNUSED,
+ HPET_MODE_LEGACY,
+ HPET_MODE_CLOCKEVT,
+ HPET_MODE_DEVICE,
+};
+
struct hpet_channel {
unsigned int num;
unsigned int irq;
+ enum hpet_mode mode;
unsigned int boot_cfg;
};
@@ -947,6 +955,9 @@ int __init hpet_enable(void)
if (id & HPET_ID_LEGSUP) {
hpet_legacy_clockevent_register();
+ hpet_base.channels[0].mode = HPET_MODE_LEGACY;
+ if (IS_ENABLED(CONFIG_HPET_EMULATE_RTC))
+ hpet_base.channels[1].mode = HPET_MODE_LEGACY;
return 1;
}
return 0;