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x86/hpet: Add function to select a /dev/hpet channel
authorThomas Gleixner <tglx@linutronix.de>
Sun, 23 Jun 2019 13:24:01 +0000 (15:24 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 27 Jun 2019 22:57:23 +0000 (00:57 +0200)
commitaf5a1dadf3fcf673906af1a1129b2b7528494ee5
treebe1ada03a31b6772eb5688f61c9297dc76ca3abb
parent9e16e4933e48819a259b8967e72e5765349953b1
x86/hpet: Add function to select a /dev/hpet channel

If CONFIG_HPET=y is enabled the x86 specific HPET code should reserve at
least one channel for the /dev/hpet character device, so that not all
channels are absorbed for per CPU clockevent devices.

Create a function to assign HPET_MODE_DEVICE so the rework of the
clockevents allocation code can utilize the mode information instead of
reducing the number of evaluated channels by #ifdef hackery.

The function is not yet used, but provided as a separate patch for ease of
review. It will be used when the rework of the clockevent selection takes
place.

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/20190623132436.002758910@linutronix.de
arch/x86/kernel/hpet.c