diff options
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 28 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/powerdomains44xx.h | 9 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/powerdomain.h | 6 |
3 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 4a91d38d7b1a..f9f0bca1926a 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -980,6 +980,34 @@ bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) } /** + * pwrdm_set_lowpwrstchange - Request a low power state change + * @pwrdm: struct powerdomain * + * + * Allows a powerdomain to transtion to a lower power sleep state + * from an existing sleep state without waking up the powerdomain. + * Returns -EINVAL if the powerdomain pointer is null or if the + * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0 + * upon success. + */ +int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) +{ + if (!pwrdm) + return -EINVAL; + + if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) + return -EINVAL; + + pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n", + pwrdm->name); + + prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK, + (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT), + pwrdm->prcm_offs, pwrstctrl_reg_offs); + + return 0; +} + +/** * pwrdm_wait_transition - wait for powerdomain power transition to finish * @pwrdm: struct powerdomain * to wait for * diff --git a/arch/arm/mach-omap2/powerdomains44xx.h b/arch/arm/mach-omap2/powerdomains44xx.h index ad5a2655ad44..c7219513472a 100644 --- a/arch/arm/mach-omap2/powerdomains44xx.h +++ b/arch/arm/mach-omap2/powerdomains44xx.h @@ -54,6 +54,7 @@ static struct powerdomain core_44xx_pwrdm = { [3] = PWRDM_POWER_ON, /* ducati_l2ram */ [4] = PWRDM_POWER_ON, /* ducati_unicache */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* gfx_44xx_pwrdm: 3D accelerator power domain */ @@ -69,6 +70,7 @@ static struct powerdomain gfx_44xx_pwrdm = { .pwrsts_mem_on = { [0] = PWRDM_POWER_ON, /* gfx_mem */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* abe_44xx_pwrdm: Audio back end power domain */ @@ -87,6 +89,7 @@ static struct powerdomain abe_44xx_pwrdm = { [0] = PWRDM_POWER_ON, /* aessmem */ [1] = PWRDM_POWER_ON, /* periphmem */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* dss_44xx_pwrdm: Display subsystem power domain */ @@ -103,6 +106,7 @@ static struct powerdomain dss_44xx_pwrdm = { .pwrsts_mem_on = { [0] = PWRDM_POWER_ON, /* dss_mem */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* tesla_44xx_pwrdm: Tesla processor power domain */ @@ -123,6 +127,7 @@ static struct powerdomain tesla_44xx_pwrdm = { [1] = PWRDM_POWER_ON, /* tesla_l1 */ [2] = PWRDM_POWER_ON, /* tesla_l2 */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* wkup_44xx_pwrdm: Wake-up power domain */ @@ -227,6 +232,7 @@ static struct powerdomain ivahd_44xx_pwrdm = { [2] = PWRDM_POWER_ON, /* tcm1_mem */ [3] = PWRDM_POWER_ON, /* tcm2_mem */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* cam_44xx_pwrdm: Camera subsystem power domain */ @@ -242,6 +248,7 @@ static struct powerdomain cam_44xx_pwrdm = { .pwrsts_mem_on = { [0] = PWRDM_POWER_ON, /* cam_mem */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* l3init_44xx_pwrdm: L3 initators pheripherals power domain */ @@ -258,6 +265,7 @@ static struct powerdomain l3init_44xx_pwrdm = { .pwrsts_mem_on = { [0] = PWRDM_POWER_ON, /* l3init_bank1 */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* l4per_44xx_pwrdm: Target peripherals power domain */ @@ -276,6 +284,7 @@ static struct powerdomain l4per_44xx_pwrdm = { [0] = PWRDM_POWER_ON, /* nonretained_bank */ [1] = PWRDM_POWER_ON, /* retained_bank */ }, + .flags = PWRDM_HAS_LOWPOWERSTATECHANGE, }; /* diff --git a/arch/arm/plat-omap/include/plat/powerdomain.h b/arch/arm/plat-omap/include/plat/powerdomain.h index e7cc7e66e977..fb6ec74fe39e 100644 --- a/arch/arm/plat-omap/include/plat/powerdomain.h +++ b/arch/arm/plat-omap/include/plat/powerdomain.h @@ -50,6 +50,12 @@ * in MEM bank 1 position. This is * true for OMAP3430 */ +#define PWRDM_HAS_LOWPOWERSTATECHANGE (1 << 2) /* + * support to transition from a + * sleep state to a lower sleep + * state without waking up the + * powerdomain + */ /* * Number of memory banks that are power-controllable. On OMAP4430, the |