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Merge branch 'omap-clock-fixes' into omap-fixes

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This commit is contained in:
Tony Lindgren
2009-04-24 09:56:16 -07:00
parent 846c29f109 f248076c0d
commit 535ff672e3
10 changed files with 112 additions and 34 deletions
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48
arch/arm/mach-omap2/timer-gp.c
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@@ -3,6 +3,8 @@
*
* OMAP2 GP timer support.
*
* Copyright (C) 2009 Nokia Corporation
*
* Update to use new clocksource/clockevent layers
* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
* Copyright (C) 2007 MontaVista Software, Inc.
@@ -36,8 +38,13 @@
#include <asm/mach/time.h>
#include <mach/dmtimer.h>
/* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
#define MAX_GPTIMER_ID 12
static struct omap_dm_timer *gptimer;
static struct clock_event_device clockevent_gpt;
static u8 __initdata gptimer_id = 1;
static u8 __initdata inited;
static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
{
@@ -95,20 +102,53 @@ static struct clock_event_device clockevent_gpt = {
.set_mode = omap2_gp_timer_set_mode,
};
/**
* omap2_gp_clockevent_set_gptimer - set which GPTIMER is used for clockevents
* @id: GPTIMER to use (1..MAX_GPTIMER_ID)
*
* Define the GPTIMER that the system should use for the tick timer.
* Meant to be called from board-*.c files in the event that GPTIMER1, the
* default, is unsuitable. Returns -EINVAL on error or 0 on success.
*/
int __init omap2_gp_clockevent_set_gptimer(u8 id)
{
if (id < 1 || id > MAX_GPTIMER_ID)
return -EINVAL;
BUG_ON(inited);
gptimer_id = id;
return 0;
}
static void __init omap2_gp_clockevent_init(void)
{
u32 tick_rate;
int src;
gptimer = omap_dm_timer_request_specific(1);
inited = 1;
gptimer = omap_dm_timer_request_specific(gptimer_id);
BUG_ON(gptimer == NULL);
#if defined(CONFIG_OMAP_32K_TIMER)
omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_32_KHZ);
src = OMAP_TIMER_SRC_32_KHZ;
#else
omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK);
src = OMAP_TIMER_SRC_SYS_CLK;
WARN(gptimer_id == 12, "WARNING: GPTIMER12 can only use the "
"secure 32KiHz clock source\n");
#endif
if (gptimer_id != 12)
WARN(IS_ERR_VALUE(omap_dm_timer_set_source(gptimer, src)),
"timer-gp: omap_dm_timer_set_source() failed\n");
tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gptimer));
pr_info("OMAP clockevent source: GPTIMER%d at %u Hz\n",
gptimer_id, tick_rate);
omap2_gp_timer_irq.dev_id = (void *)gptimer;
setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
@@ -125,6 +165,8 @@ static void __init omap2_gp_clockevent_init(void)
clockevents_register_device(&clockevent_gpt);
}
/* Clocksource code */
#ifdef CONFIG_OMAP_32K_TIMER
/*
* When 32k-timer is enabled, don't use GPTimer for clocksource