[PATCH/RFC 1/2] OMAP2+: powerdomain: add API to get context loss count

Kevin Hilman
2010-12-10T00:08:36Z

Add new powerdomain API

int pwrdm_get_context_loss_count(struct powerdomain *pwrdm)

for checking how many times the powerdomain has lost context. The
loss count is the sum sum of the powerdomain off-mode counter, the
logic off counter and the per-bank memory off counter.

Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
---
arch/arm/mach-omap2/powerdomain.c | 23 +++++++++++++++++++++++
arch/arm/mach-omap2/powerdomain.h | 1 +
2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index 06ef60e..78e7d22 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -909,3 +909,26 @@ int pwrdm_post_transition(void)
pwrdm_for_each(_pwrdm_post_transition_cb, NULL);
return 0;
}
+
+/**
+ * pwrdm_get_context_loss_count - get powerdomain's context loss count
+ * @pwrdm: struct powerdomain * to wait for
+ *
+ * Context loss count is a sum of powerdomain off-mode counter,
+ * the logic off counter and the per-bank memory off counter.
+ */
+int pwrdm_get_context_loss_count(struct powerdomain *pwrdm)
+{
+ int i, count;
+
+ count = pwrdm->state_counter[PWRDM_POWER_OFF];
+ count += pwrdm->ret_logic_off_counter;
+
+ for (i = 0; i < pwrdm->banks; i++)
+ count += pwrdm->ret_mem_off_counter[i];
+
+ pr_debug("powerdomain: %s: context loss count = %u\n",
+ pwrdm->name, count);
+
+ return count;
+}
diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h
index 35b5b48..d269eff 100644
--- a/arch/arm/mach-omap2/powerdomain.h
+++ b/arch/arm/mach-omap2/powerdomain.h
@@ -211,6 +211,7 @@ int pwrdm_clkdm_state_switch(struct clockdomain *clkdm);
int pwrdm_pre_transition(void);
int pwrdm_post_transition(void);
int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm);
+int pwrdm_get_context_loss_count(struct powerdomain *pwrdm);

extern void omap2xxx_powerdomains_init(void);
extern void omap3xxx_powerdomains_init(void);
--
1.7.2.1