diff options
Diffstat (limited to 'arch/arm/mach-omap2/timer-gp.c')
| -rw-r--r-- | arch/arm/mach-omap2/timer-gp.c | 86 |
1 files changed, 18 insertions, 68 deletions
diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c index 1d2f5ac2f69b..fe5fd6d42dea 100644 --- a/arch/arm/mach-omap2/timer-gp.c +++ b/arch/arm/mach-omap2/timer-gp.c @@ -6,6 +6,7 @@ * Copyright (C) 2005 Nokia Corporation * Author: Paul Mundt <paul.mundt@nokia.com> * Juha Yrjölä <juha.yrjola@nokia.com> + * OMAP Dual-mode timer framework support by Timo Teras * * Some parts based off of TI's 24xx code: * @@ -22,54 +23,18 @@ #include <linux/interrupt.h> #include <linux/err.h> #include <linux/clk.h> +#include <linux/delay.h> #include <asm/mach/time.h> -#include <asm/delay.h> -#include <asm/io.h> +#include <asm/arch/dmtimer.h> -#define OMAP2_GP_TIMER1_BASE 0x48028000 -#define OMAP2_GP_TIMER2_BASE 0x4802a000 -#define OMAP2_GP_TIMER3_BASE 0x48078000 -#define OMAP2_GP_TIMER4_BASE 0x4807a000 +static struct omap_dm_timer *gptimer; -#define GP_TIMER_TIDR 0x00 -#define GP_TIMER_TISR 0x18 -#define GP_TIMER_TIER 0x1c -#define GP_TIMER_TCLR 0x24 -#define GP_TIMER_TCRR 0x28 -#define GP_TIMER_TLDR 0x2c -#define GP_TIMER_TSICR 0x40 - -#define OS_TIMER_NR 1 /* GP timer 2 */ - -static unsigned long timer_base[] = { - IO_ADDRESS(OMAP2_GP_TIMER1_BASE), - IO_ADDRESS(OMAP2_GP_TIMER2_BASE), - IO_ADDRESS(OMAP2_GP_TIMER3_BASE), - IO_ADDRESS(OMAP2_GP_TIMER4_BASE), -}; - -static inline unsigned int timer_read_reg(int nr, unsigned int reg) -{ - return __raw_readl(timer_base[nr] + reg); -} - -static inline void timer_write_reg(int nr, unsigned int reg, unsigned int val) -{ - __raw_writel(val, timer_base[nr] + reg); -} - -/* Note that we always enable the clock prescale divider bit */ -static inline void omap2_gp_timer_start(int nr, unsigned long load_val) +static inline void omap2_gp_timer_start(unsigned long load_val) { - unsigned int tmp; - - tmp = 0xffffffff - load_val; - - timer_write_reg(nr, GP_TIMER_TLDR, tmp); - timer_write_reg(nr, GP_TIMER_TCRR, tmp); - timer_write_reg(nr, GP_TIMER_TIER, 1 << 1); - timer_write_reg(nr, GP_TIMER_TCLR, (1 << 5) | (1 << 1) | 1); + omap_dm_timer_set_load(gptimer, 1, 0xffffffff - load_val); + omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW); + omap_dm_timer_start(gptimer); } static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id, @@ -77,7 +42,7 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id, { write_seqlock(&xtime_lock); - timer_write_reg(OS_TIMER_NR, GP_TIMER_TISR, 1 << 1); + omap_dm_timer_write_status(gptimer, OMAP_TIMER_INT_OVERFLOW); timer_tick(regs); write_sequnlock(&xtime_lock); @@ -87,41 +52,26 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id, static struct irqaction omap2_gp_timer_irq = { .name = "gp timer", - .flags = SA_INTERRUPT, + .flags = IRQF_DISABLED | IRQF_TIMER, .handler = omap2_gp_timer_interrupt, }; static void __init omap2_gp_timer_init(void) { - struct clk * sys_ck; - u32 tick_period = 120000; - u32 l; + u32 tick_period; - /* Reset clock and prescale value */ - timer_write_reg(OS_TIMER_NR, GP_TIMER_TCLR, 0); + omap_dm_timer_init(); + gptimer = omap_dm_timer_request_specific(1); + BUG_ON(gptimer == NULL); - sys_ck = clk_get(NULL, "sys_ck"); - if (IS_ERR(sys_ck)) - printk(KERN_ERR "Could not get sys_ck\n"); - else { - clk_enable(sys_ck); - tick_period = clk_get_rate(sys_ck) / 100; - clk_put(sys_ck); - } - - tick_period /= 2; /* Minimum prescale divider is 2 */ + omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK); + tick_period = clk_get_rate(omap_dm_timer_get_fclk(gptimer)) / 100; tick_period -= 1; - l = timer_read_reg(OS_TIMER_NR, GP_TIMER_TIDR); - printk(KERN_INFO "OMAP2 GP timer (HW version %d.%d)\n", - (l >> 4) & 0x0f, l & 0x0f); - - setup_irq(38, &omap2_gp_timer_irq); - - omap2_gp_timer_start(OS_TIMER_NR, tick_period); + setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq); + omap2_gp_timer_start(tick_period); } struct sys_timer omap_timer = { .init = omap2_gp_timer_init, }; - |