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authorTarun Kanti DebBarma <tarun.kanti@ti.com>2011-09-20 17:00:24 +0530
committerTony Lindgren <tony@atomide.com>2011-09-21 17:07:34 -0700
commitb481113a8af65f49afed46d4c9132b7af9426684 (patch)
treef468369003b3d0e70342aee8d0cce6b1c637e1a7 /arch/arm/mach-omap2/timer.c
parent0dad9faeaeb0fa3524068a94e1745b91e5597c17 (diff)
ARM: OMAP: dmtimer: low-power mode support
Clock is enabled only when timer is started and disabled when the the timer is stopped. Therefore before accessing registers in functions clock is enabled and then disabled back at the end of access. Context save is done dynamically whenever the registers are modified. Context restore is called when context is lost. Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> [tony@atomide.com: updated to use revision instead of tidr] Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/timer.c')
-rw-r--r--arch/arm/mach-omap2/timer.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index f1e3ec1c16e..1140e98c977 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -44,6 +44,9 @@
#include <plat/common.h>
#include <plat/omap_hwmod.h>
#include <plat/omap_device.h>
+#include <plat/omap-pm.h>
+
+#include "powerdomain.h"
/* Parent clocks, eventually these will come from the clock framework */
@@ -433,6 +436,7 @@ static int __init omap_timer_init(struct omap_hwmod *oh, void *unused)
struct dmtimer_platform_data *pdata;
struct omap_device *od;
struct omap_timer_capability_dev_attr *timer_dev_attr;
+ struct powerdomain *pwrdm;
pr_debug("%s: %s\n", __func__, oh->name);
@@ -467,6 +471,11 @@ static int __init omap_timer_init(struct omap_hwmod *oh, void *unused)
if ((sys_timer_reserved >> (id - 1)) & 0x1)
pdata->reserved = 1;
+ pwrdm = omap_hwmod_get_pwrdm(oh);
+ pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
+#ifdef CONFIG_PM
+ pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
+#endif
od = omap_device_build(name, id, oh, pdata, sizeof(*pdata),
omap2_dmtimer_latency,
ARRAY_SIZE(omap2_dmtimer_latency),