Hi Kevin
On Fri, 17 Dec 2010, Kevin Hilman wrote:
> Add new powerdomain API
>
> u32 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
> Signed-off-by: Kevin Hilman
I've updated this patch to tweak the function's comments and to remove the
negative return code from a function returning an u32. Updated patch is
below.
- Paul
From: Kevin Hilman
Date: Fri, 17 Dec 2010 17:14:13 -0800
Subject: [PATCH] OMAP2+: powerdomain: add API to get context loss count
Add new powerdomain API
u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm)
for checking how many times the powerdomain has lost context. The
loss count is the sum of the powerdomain off-mode counter, the
logic off counter and the per-bank memory off counter.
Signed-off-by: Kevin Hilman
[p...@pwsan.com: removed bogus return value on error; improved kerneldoc;
tweaked commit message]
Signed-off-by: Paul Walmsley
---
arch/arm/mach-omap2/powerdomain.c | 29 +
arch/arm/mach-omap2/powerdomain.h |1 +
2 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/powerdomain.c
b/arch/arm/mach-omap2/powerdomain.c
index 06ef60ee..eaed0df 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -909,3 +909,32 @@ 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 the sum of powerdomain off-mode counter, the
+ * logic off counter and the per-bank memory off counter. Returns 0
+ * (and WARNs) upon error, otherwise, returns the context loss count.
+ */
+u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm)
+{
+ int i, count;
+
+ if (!pwrdm) {
+ WARN(1, "powerdomain: %s: pwrdm is null\n", __func__);
+ return 0;
+ }
+
+ 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..c66431e 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);
+u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm);
extern void omap2xxx_powerdomains_init(void);
extern void omap3xxx_powerdomains_init(void);
--
1.7.2.3
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