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ANDROID: GKI: drivers: clksource: Add API to return cval

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Sleep driver needs to program the absolute clock value for next expiry
into pdc register for system wake up. Add an API to read the cval low
and high counters.

Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>
Bug: 152635062
Test: build
(cherry picked from commit ee514e9083c5d9f3312a54fd317786da7c9abdb1)
[surenb: replaced out-of-tree readl_relaxed_no_log with functionally
identical in-tree readl_relaxed]
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I1244c31c8a2717a6f2002cac3b26ee3526409058
Merged-In: I1244c31c8a2717a6f2002cac3b26ee3526409058
This commit is contained in:
Channagoud Kadabi 2017-12-20 11:46:30 -08:00 committed by Suren Baghdasaryan
parent 3179a1a38d
commit 1f01baa02c
2 changed files with 24 additions and 0 deletions
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19
drivers/clocksource/arm_arch_timer.c
View File

@ -52,6 +52,8 @@
#define CNTFRQ 0x10
#define CNTP_TVAL 0x28
#define CNTP_CTL 0x2c
#define CNTCVAL_LO 0x30
#define CNTCVAL_HI 0x34
#define CNTV_TVAL 0x38
#define CNTV_CTL 0x3c
@ -957,6 +959,23 @@ bool arch_timer_evtstrm_available(void)
return cpumask_test_cpu(raw_smp_processor_id(), &evtstrm_available);
}
void arch_timer_mem_get_cval(u32 *lo, u32 *hi)
{
u32 ctrl;
*lo = *hi = ~0U;
if (!arch_counter_base)
return;
ctrl = readl_relaxed(arch_counter_base + CNTV_CTL);
if (ctrl & ARCH_TIMER_CTRL_ENABLE) {
*lo = readl_relaxed(arch_counter_base + CNTCVAL_LO);
*hi = readl_relaxed(arch_counter_base + CNTCVAL_HI);
}
}
static u64 arch_counter_get_cntvct_mem(void)
{
u32 vct_lo, vct_hi, tmp_hi;

5
include/clocksource/arm_arch_timer.h
View File

@ -96,6 +96,7 @@ extern u32 arch_timer_get_rate(void);
extern u64 (*arch_timer_read_counter)(void);
extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void);
extern bool arch_timer_evtstrm_available(void);
extern void arch_timer_mem_get_cval(u32 *lo, u32 *hi);
#else
@ -114,6 +115,10 @@ static inline bool arch_timer_evtstrm_available(void)
return false;
}
static void arch_timer_mem_get_cval(u32 *lo, u32 *hi)
{
*lo = *hi = ~0U;
}
#endif
#endif