Moves some constants and functions related to xloops, cycles computation out to a new header. Also rename some macros in qcom/rpmh-rsc.c which were occupying the same namespace. No functional change. Cc: Catalin Marinas Cc: Will Deacon Cc: Bjorn Andersson Cc: Konrad Dybcio Cc: linux-arm-kernel@lists.infradead.org Reviewed-by: Christoph Lameter Signed-off-by: Ankur Arora --- Notes: - workaround warnings from the kernel build robot. arch/arm64/include/asm/delay-const.h | 25 +++++++++++++++++++++++++ arch/arm64/lib/delay.c | 13 +++---------- drivers/soc/qcom/rpmh-rsc.c | 8 ++++---- 3 files changed, 32 insertions(+), 14 deletions(-) create mode 100644 arch/arm64/include/asm/delay-const.h diff --git a/arch/arm64/include/asm/delay-const.h b/arch/arm64/include/asm/delay-const.h new file mode 100644 index 000000000000..63fb5fc24a90 --- /dev/null +++ b/arch/arm64/include/asm/delay-const.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _ASM_DELAY_CONST_H +#define _ASM_DELAY_CONST_H + +#include /* For HZ */ + +/* 2**32 / 1000000 (rounded up) */ +#define __usecs_to_xloops_mult 0x10C7UL + +/* 2**32 / 1000000000 (rounded up) */ +#define __nsecs_to_xloops_mult 0x5UL + +extern unsigned long loops_per_jiffy; +static inline unsigned long xloops_to_cycles(unsigned long xloops) +{ + return (xloops * loops_per_jiffy * HZ) >> 32; +} + +#define USECS_TO_CYCLES(time_usecs) \ + xloops_to_cycles((time_usecs) * __usecs_to_xloops_mult) + +#define NSECS_TO_CYCLES(time_nsecs) \ + xloops_to_cycles((time_nsecs) * __nsecs_to_xloops_mult) + +#endif /* _ASM_DELAY_CONST_H */ diff --git a/arch/arm64/lib/delay.c b/arch/arm64/lib/delay.c index cb2062e7e234..511b5597e2a5 100644 --- a/arch/arm64/lib/delay.c +++ b/arch/arm64/lib/delay.c @@ -12,17 +12,10 @@ #include #include #include +#include #include -#define USECS_TO_CYCLES(time_usecs) \ - xloops_to_cycles((time_usecs) * 0x10C7UL) - -static inline unsigned long xloops_to_cycles(unsigned long xloops) -{ - return (xloops * loops_per_jiffy * HZ) >> 32; -} - void __delay(unsigned long cycles) { cycles_t start = get_cycles(); @@ -58,12 +51,12 @@ EXPORT_SYMBOL(__const_udelay); void __udelay(unsigned long usecs) { - __const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */ + __const_udelay(usecs * __usecs_to_xloops_mult); } EXPORT_SYMBOL(__udelay); void __ndelay(unsigned long nsecs) { - __const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */ + __const_udelay(nsecs * __nsecs_to_xloops_mult); } EXPORT_SYMBOL(__ndelay); diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index c6f7d5c9c493..ad5ec5c0de0a 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -146,10 +146,10 @@ enum { * +---------------------------------------------------+ */ -#define USECS_TO_CYCLES(time_usecs) \ - xloops_to_cycles((time_usecs) * 0x10C7UL) +#define RPMH_USECS_TO_CYCLES(time_usecs) \ + rpmh_xloops_to_cycles((time_usecs) * 0x10C7UL) -static inline unsigned long xloops_to_cycles(u64 xloops) +static inline unsigned long rpmh_xloops_to_cycles(u64 xloops) { return (xloops * loops_per_jiffy * HZ) >> 32; } @@ -819,7 +819,7 @@ void rpmh_rsc_write_next_wakeup(struct rsc_drv *drv) wakeup_us = ktime_to_us(wakeup); /* Convert the wakeup to arch timer scale */ - wakeup_cycles = USECS_TO_CYCLES(wakeup_us); + wakeup_cycles = RPMH_USECS_TO_CYCLES(wakeup_us); wakeup_cycles += arch_timer_read_counter(); exit: -- 2.31.1