From 7f595674e08b8b4d3faf64a19bccc95445d7ed35 Mon Sep 17 00:00:00 2001 From: Kevin Hilman Date: Tue, 21 Dec 2010 21:31:55 -0700 Subject: 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 [paul@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(+) (limited to 'arch') 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); -- cgit v1.2.3