From 6792e636d5bfc1b26c25e7ed056b358e1144c6df Mon Sep 17 00:00:00 2001 From: Tomasz Figa Date: Mon, 17 Jun 2013 00:13:06 +0200 Subject: [PATCH] clocksource: samsung_pwm_timer: Do not use clocksource_mmio In case of Samsung PWM timer, clocksource MMIO can not be used, because custom suspend/resume callbacks are required. Signed-off-by: Tomasz Figa Reviewed-by: Daniel Lezcano Reviewed-by: Sylwester Nawrocki Tested-by: Heiko Stuebner Tested-by: Mark Brown Tested-by: Sylwester Nawrocki Acked-by: Arnd Bergmann --- drivers/clocksource/Kconfig | 1 - drivers/clocksource/samsung_pwm_timer.c | 19 +++++++++++++++---- 2 files changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index b7b9b040a89b..41c69469ce20 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -99,7 +99,6 @@ config CLKSRC_EXYNOS_MCT config CLKSRC_SAMSUNG_PWM bool - select CLKSRC_MMIO help This is a new clocksource driver for the PWM timer found in Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c index 0c005f4fa296..b3112dc293ba 100644 --- a/drivers/clocksource/samsung_pwm_timer.c +++ b/drivers/clocksource/samsung_pwm_timer.c @@ -298,6 +298,18 @@ static void __init samsung_clockevent_init(void) } } +static cycle_t samsung_clocksource_read(struct clocksource *c) +{ + return ~readl_relaxed(pwm.source_reg); +} + +static struct clocksource samsung_clocksource = { + .name = "samsung_clocksource_timer", + .rating = 250, + .read = samsung_clocksource_read, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + /* * Override the global weak sched_clock symbol with this * local implementation which uses the clocksource to get some @@ -307,7 +319,7 @@ static void __init samsung_clockevent_init(void) */ static u32 notrace samsung_read_sched_clock(void) { - return ~__raw_readl(pwm.source_reg); + return samsung_clocksource_read(NULL); } static void __init samsung_clocksource_init(void) @@ -334,9 +346,8 @@ static void __init samsung_clocksource_init(void) setup_sched_clock(samsung_read_sched_clock, pwm.variant.bits, clock_rate); - ret = clocksource_mmio_init(pwm.source_reg, "samsung_clocksource_timer", - clock_rate, 250, pwm.variant.bits, - clocksource_mmio_readl_down); + samsung_clocksource.mask = CLOCKSOURCE_MASK(pwm.variant.bits); + ret = clocksource_register_hz(&samsung_clocksource, clock_rate); if (ret) panic("samsung_clocksource_timer: can't register clocksource\n"); } -- 2.39.5