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Commit 7f595674 authored by Kevin Hilman's avatar Kevin Hilman Committed by Paul Walmsley
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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: default avatarKevin Hilman <khilman@deeprootsystems.com>
[paul@pwsan.com: removed bogus return value on error; improved kerneldoc;
 tweaked commit message]
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
parent 0a01aa21

arch/arm/mach-omap2/powerdomain.c

+29 −0
Original line number Diff line number Diff line
@@ -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;

}

arch/arm/mach-omap2/powerdomain.h

+1 −0
Original line number Diff line number Diff line
@@ -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);