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| author | Kevin Hilman <khilman@deeprootsystems.com> | 2010-12-22 05:31:55 +0100 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2010-12-22 05:31:55 +0100 |
| commit | 7f595674e08b8b4d3faf64a19bccc95445d7ed35 (patch) | |
| tree | bbd97c930eb170b877a5d6c35e9bc9ec206a9559 /arch | |
| parent | OMAP4: clocks: add dummy clock for mailbox (diff) | |
| download | linux-7f595674e08b8b4d3faf64a19bccc95445d7ed35.tar.xz linux-7f595674e08b8b4d3faf64a19bccc95445d7ed35.zip | |
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 <khilman@deeprootsystems.com>
[paul@pwsan.com: removed bogus return value on error; improved kerneldoc;
tweaked commit message]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 29 | ||||
| -rw-r--r-- | 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 06ef60eebebd..eaed0df16699 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 35b5b4800a43..c66431edfeb7 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); |