From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Tue, 10 May 2011 08:32:05 +0100 Subject: [PATCH 11/13] clocksource: convert SPEAr platforms 16-bit up counting clocksource In-Reply-To: <20110510072700.GA29869@n2100.arm.linux.org.uk> References: <20110510072700.GA29869@n2100.arm.linux.org.uk> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Convert SPEAr platforms 16-bit up counting clocksource, which requires a 16-bit register access read rather than 32-bit. Cc: Viresh Kumar Signed-off-by: Russell King --- arch/arm/Kconfig | 1 + arch/arm/plat-spear/time.c | 16 ++-------------- 2 files changed, 3 insertions(+), 14 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index bab25a0..cbc27fb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -884,6 +884,7 @@ config PLAT_SPEAR select ARM_AMBA select ARCH_REQUIRE_GPIOLIB select CLKDEV_LOOKUP + select CLKSRC_MMIO select GENERIC_CLOCKEVENTS select HAVE_CLK help diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c index dbb6e4f..0c77e42 100644 --- a/arch/arm/plat-spear/time.c +++ b/arch/arm/plat-spear/time.c @@ -70,19 +70,6 @@ static void clockevent_set_mode(enum clock_event_mode mode, static int clockevent_next_event(unsigned long evt, struct clock_event_device *clk_event_dev); -static cycle_t clocksource_read_cycles(struct clocksource *cs) -{ - return (cycle_t) readw(gpt_base + COUNT(CLKSRC)); -} - -static struct clocksource clksrc = { - .name = "tmr1", - .rating = 200, /* its a pretty decent clock */ - .read = clocksource_read_cycles, - .mask = 0xFFFF, /* 16 bits */ - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - static void spear_clocksource_init(void) { u32 tick_rate; @@ -103,7 +90,8 @@ static void spear_clocksource_init(void) writew(val, gpt_base + CR(CLKSRC)); /* register the clocksource */ - clocksource_register_hz(&clksrc, tick_rate); + clocksource_mmio_init(gpt_base + COUNT(CLKSRC), "tmr1", tick_rate, + 200, 16, clocksource_mmio_readw_up); } static struct clock_event_device clkevt = { -- 1.7.4.4