diff options
author | Thara Gopinath <thara@ti.com> | 2010-02-24 12:05:49 -0700 |
---|---|---|
committer | Paul Walmsley <paul@pwsan.com> | 2010-02-24 12:05:49 -0700 |
commit | 1e3d0d2ba9ce1f975ca59d9a1048175f1e9c01ac (patch) | |
tree | 673c08a001a1fb0256244c6815451fff0cb34001 /arch/arm | |
parent | b024b542c3697dceb7b625773358310ee34382a6 (diff) |
OMAP2/3 PM: Adding powerdomain APIs for reading the next logic and mem state
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>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 73 | ||||
-rw-r--r-- | arch/arm/plat-omap/include/plat/powerdomain.h | 2 |
2 files changed, 75 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index dc03289d5de..e9eeaa4fbd4 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -679,6 +679,29 @@ int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) } /** + * 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 * @bank: memory bank number (0-3) @@ -785,6 +808,56 @@ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) } /** + * 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 * diff --git a/arch/arm/plat-omap/include/plat/powerdomain.h b/arch/arm/plat-omap/include/plat/powerdomain.h index e15c7e9da97..6657ff2dfb6 100644 --- a/arch/arm/plat-omap/include/plat/powerdomain.h +++ b/arch/arm/plat-omap/include/plat/powerdomain.h @@ -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); |