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| author | Alexander Shiyan <shc_work@mail.ru> | 2012-10-10 17:45:27 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-10-25 17:22:34 +0200 |
| commit | 4a8355c4c34f55aecd204604f02e179eaee15502 (patch) | |
| tree | ae0a41a603544d341a7482fdfe75bb87717eb475 /arch/arm/mach-clps711x | |
| parent | Linux 3.7-rc1 (diff) | |
| download | linux-4a8355c4c34f55aecd204604f02e179eaee15502.tar.xz linux-4a8355c4c34f55aecd204604f02e179eaee15502.zip | |
ARM: clps711x: convert to clockevents
This patch converts CLPS711X-platform to use modern clockevent API.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-clps711x')
| -rw-r--r-- | arch/arm/mach-clps711x/common.c | 38 |
1 files changed, 17 insertions, 21 deletions
diff --git a/arch/arm/mach-clps711x/common.c b/arch/arm/mach-clps711x/common.c index 509243d89a32..218684f0d7b4 100644 --- a/arch/arm/mach-clps711x/common.c +++ b/arch/arm/mach-clps711x/common.c @@ -21,13 +21,14 @@ */ #include <linux/io.h> #include <linux/init.h> +#include <linux/sizes.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/clk.h> #include <linux/clkdev.h> +#include <linux/clockchips.h> #include <linux/clk-provider.h> -#include <asm/sizes.h> #include <asm/mach/map.h> #include <asm/mach/time.h> #include <asm/system_misc.h> @@ -36,7 +37,6 @@ static struct clk *clk_pll, *clk_bus, *clk_uart, *clk_timerl, *clk_timerh, *clk_tint, *clk_spi; -static unsigned long latch; /* * This maps the generic CLPS711x registers @@ -158,32 +158,29 @@ void __init clps711x_init_irq(void) clps_writel(0, KBDEOI); } -/* - * gettimeoffset() returns time since last timer tick, in usecs. - * - * 'LATCH' is hwclock ticks (see CLOCK_TICK_RATE in timex.h) per jiffy. - * 'tick' is usecs per jiffy. - */ -static unsigned long clps711x_gettimeoffset(void) +static void clps711x_clockevent_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) { - unsigned long hwticks; - hwticks = latch - (clps_readl(TC2D) & 0xffff); - return (hwticks * (tick_nsec / 1000)) / latch; } -/* - * IRQ handler for the timer - */ -static irqreturn_t p720t_timer_interrupt(int irq, void *dev_id) +static struct clock_event_device clockevent_clps711x = { + .name = "CLPS711x Clockevents", + .rating = 300, + .features = CLOCK_EVT_FEAT_PERIODIC, + .set_mode = clps711x_clockevent_set_mode, +}; + +static irqreturn_t clps711x_timer_interrupt(int irq, void *dev_id) { - timer_tick(); + clockevent_clps711x.event_handler(&clockevent_clps711x); + return IRQ_HANDLED; } static struct irqaction clps711x_timer_irq = { .name = "CLPS711x Timer Tick", .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, - .handler = p720t_timer_interrupt, + .handler = clps711x_timer_interrupt, }; static void add_fixed_clk(struct clk *clk, const char *name, int rate) @@ -244,20 +241,19 @@ static void __init clps711x_timer_init(void) pr_info("CPU frequency set at %i Hz.\n", cpu); - latch = (timh + HZ / 2) / HZ; + clps_writew(DIV_ROUND_CLOSEST(timh, HZ), TC2D); tmp = clps_readl(SYSCON1); tmp |= SYSCON1_TC2S | SYSCON1_TC2M; clps_writel(tmp, SYSCON1); - clps_writel(latch - 1, TC2D); + clockevents_config_and_register(&clockevent_clps711x, timh, 1, 0xffff); setup_irq(IRQ_TC2OI, &clps711x_timer_irq); } struct sys_timer clps711x_timer = { .init = clps711x_timer_init, - .offset = clps711x_gettimeoffset, }; void clps711x_restart(char mode, const char *cmd) |