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OMAP2/3 PM: Adding powerdomain APIs for reading the next logic and mem state

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This patch adds APIs pwrdm_read_logic_retst and
pwrdm_read_mem_retst for reading the next programmed
logic and memory state a powerdomain is to hit in event
of the next power domain state being retention.
These are needed for OSWR support.

Signed-off-by: Thara Gopinath <thara@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Thara Gopinath 2010-02-24 12:05:49 -07:00 committed by Paul Walmsley
parent b024b542c3
commit 1e3d0d2ba9
2 changed files with 75 additions and 0 deletions
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73
arch/arm/mach-omap2/powerdomain.c
View file

@ -678,6 +678,29 @@ int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
OMAP3430_LASTLOGICSTATEENTERED);
}
/**
* pwrdm_read_logic_retst - get next powerdomain logic power state
* @pwrdm: struct powerdomain * to get next logic power state
*
* Return the powerdomain pwrdm's logic power state. Returns -EINVAL
* if the powerdomain pointer is null or returns the next logic
* power state upon success.
*/
int pwrdm_read_logic_retst(struct powerdomain *pwrdm)
{
if (!pwrdm)
return -EINVAL;
/*
* The register bit names below may not correspond to the
* actual names of the bits in each powerdomain's register,
* but the type of value returned is the same for each
* powerdomain.
*/
return prm_read_mod_bits_shift(pwrdm->prcm_offs, pwrstctrl_reg_offs,
OMAP3430_LOGICSTATEST);
}
/**
* pwrdm_read_mem_pwrst - get current memory bank power state
* @pwrdm: struct powerdomain * to get current memory bank power state
@ -784,6 +807,56 @@ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
OMAP3430_PM_PREPWSTST, m);
}
/**
* pwrdm_read_mem_retst - get next memory bank power state
* @pwrdm: struct powerdomain * to get mext memory bank power state
* @bank: memory bank number (0-3)
*
* Return the powerdomain pwrdm's next memory power state for bank
* x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
* the target memory bank does not exist or is not controllable, or
* returns the next memory power state upon success.
*/
int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
{
u32 m;
if (!pwrdm)
return -EINVAL;
if (pwrdm->banks < (bank + 1))
return -EEXIST;
/*
* The register bit names below may not correspond to the
* actual names of the bits in each powerdomain's register,
* but the type of value returned is the same for each
* powerdomain.
*/
switch (bank) {
case 0:
m = OMAP_MEM0_RETSTATE_MASK;
break;
case 1:
m = OMAP_MEM1_RETSTATE_MASK;
break;
case 2:
m = OMAP_MEM2_RETSTATE_MASK;
break;
case 3:
m = OMAP_MEM3_RETSTATE_MASK;
break;
case 4:
m = OMAP_MEM4_RETSTATE_MASK;
default:
WARN_ON(1); /* should never happen */
return -EEXIST;
}
return prm_read_mod_bits_shift(pwrdm->prcm_offs,
pwrstctrl_reg_offs, m);
}
/**
* pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
* @pwrdm: struct powerdomain * to clear

2
arch/arm/plat-omap/include/plat/powerdomain.h
View file

@ -137,8 +137,10 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
int pwrdm_read_logic_retst(struct powerdomain *pwrdm);
int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank);
int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);