[PATCH 13/15] OMAP2+: omap_hwmod: manage the wake-up latency constraints

jean.pihet
2011-08-16T13:44:12Z

Hwmod is queried from the OMAP_PM layer to manage the power domains
wake-up latency constraints. Hwmod retrieves the correct power domain
and if it exists it calls the corresponding power domain function.

Tested on OMAP3 Beagleboard and OMAP4 Pandaboard in RET/OFF using wake-up
latency constraints on MPU, CORE and PER.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
arch/arm/mach-omap2/omap_hwmod.c | 26 +++++++++++++++++++++++++-
arch/arm/plat-omap/include/plat/omap_hwmod.h | 2 ++
2 files changed, 27 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 84cc0bd..c6b1cc9 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -143,6 +143,7 @@
#include "powerdomain.h"
#include <plat/clock.h>
#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
#include <plat/prcm.h>

#include "cm2xxx_3xxx.h"
@@ -2618,11 +2619,34 @@ ohsps_unlock:
return ret;
}

+/*
+ * omap_hwmod_set_wkup_constraint- set/release a wake-up latency constraint
+ *
+ * @oh: struct omap_hwmod* to which the target device belongs to.
+ * @cookie: identifier of the constraints list for @oh.
+ * @min_latency: the minimum allowed wake-up latency for @oh.
+ *
+ * Returns 0 upon success.
+ */
+int omap_hwmod_set_wkup_lat_constraint(struct omap_hwmod *oh,
+ void *cookie, long min_latency)
+{
+ struct powerdomain *pwrdm = omap_hwmod_get_pwrdm(oh);
+
+ if (!pwrdm) {
+ pr_err("%s: Error: could not find powerdomain "
+ "for %s\n", __func__, oh->name);
+ return -EINVAL;
+ }
+
+ return pwrdm_set_wkup_lat_constraint(pwrdm, cookie, min_latency);
+}
+
/**
* omap_hwmod_get_context_loss_count - get lost context count
* @oh: struct omap_hwmod *
*
- * Query the powerdomain of of @oh to get the context loss
+ * Query the powerdomain of @oh to get the context loss
* count for this device.
*
* Returns the context loss count of the powerdomain assocated with @oh
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 0e329ca..75e0e7a 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -603,6 +603,8 @@ int omap_hwmod_for_each_by_class(const char *classname,
void *user);

int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state);
+int omap_hwmod_set_wkup_lat_constraint(struct omap_hwmod *oh, void *cookie,
+ long min_latency);
u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh);

int omap_hwmod_no_setup_reset(struct omap_hwmod *oh);
--
1.7.4.1