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Commit 3c865ca8 authored by Channagoud Kadabi's avatar Channagoud Kadabi Committed by Mahesh Sivasubramanian
Browse files

drivers: clksource: Add API to return cval 



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.

Change-Id: I3f08b3320ea281894d46f3c4bb0862784cc337a1
Signed-off-by: default avatarChannagoud Kadabi <ckadabi@codeaurora.org>
parent aece7008

drivers/clocksource/arm_arch_timer.c

+19 −0
Original line number Diff line number Diff line
@@ -53,6 +53,8 @@ 
#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
@@ -868,6 +870,23 @@ u32 arch_timer_get_rate(void) 
	return arch_timer_rate;

}



void arch_timer_mem_get_cval(u32 *lo, u32 *hi)

{

	u32 ctrl;



	*lo = *hi = ~0U;



	if (!arch_counter_base)

		return;



	ctrl = readl_relaxed_no_log(arch_counter_base + CNTV_CTL);



	if (ctrl & ARCH_TIMER_CTRL_ENABLE) {

		*lo = readl_relaxed_no_log(arch_counter_base + CNTCVAL_LO);

		*hi = readl_relaxed_no_log(arch_counter_base + CNTCVAL_HI);

	}

}



static u64 arch_counter_get_cntvct_mem(void)

{

	u32 vct_lo, vct_hi, tmp_hi;

include/clocksource/arm_arch_timer.h

+5 −1
Original line number Diff line number Diff line
@@ -93,7 +93,7 @@ struct arch_timer_mem { 
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 void arch_timer_mem_get_cval(u32 *lo, u32 *hi);

#else



static inline u32 arch_timer_get_rate(void)
@@ -106,6 +106,10 @@ static inline u64 arch_timer_read_counter(void) 
	return 0;

}



static void arch_timer_mem_get_cval(u32 *lo, u32 *hi)

{

	*lo = *hi = ~0U;

}

#endif



#endif