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-rw-r--r--arch/arm/mach-omap2/timer-gp.c86
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..cf78e6c5a277 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 = SA_INTERRUPT | SA_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,
};
-