There's no need to determine the current power state for powerdomains
that must be on while the kernel is running. We mark these
powerdomains with a new flag, PWRDM_ACTIVE_WITH_KERNEL. Any
powerdomain marked with that flag is reported as being in the ON power
state while the kernel is running.
Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
Cc: Benoît Cousson <b-cousson@xxxxxx>
---
arch/arm/mach-omap2/powerdomain.c | 9 ++++++---
arch/arm/mach-omap2/powerdomain.h | 4 ++++
arch/arm/mach-omap2/powerdomains2xxx_data.c | 2 ++
arch/arm/mach-omap2/powerdomains33xx_data.c | 3 ++-
arch/arm/mach-omap2/powerdomains3xxx_data.c | 9 ++++++---
arch/arm/mach-omap2/powerdomains44xx_data.c | 5 ++++-
6 files changed, 24 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index f5e2727..a4bb0bb 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -462,7 +462,8 @@ static int _pwrdm_read_fpwrst(struct powerdomain *pwrdm)
int pwrst, logic_pwrst, ret;
u8 fpwrst;
- if (!_pwrdm_pwrst_can_change(pwrdm))
+ if (!_pwrdm_pwrst_can_change(pwrdm) ||
+ pwrdm->flags & PWRDM_ACTIVE_WITH_KERNEL)
return PWRDM_FUNC_PWRST_ON;
pwrst = arch_pwrdm->pwrdm_read_pwrst(pwrdm);
@@ -1104,12 +1105,14 @@ bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm)
int pwrdm_state_switch_nolock(struct powerdomain *pwrdm)
{
- int ret;
+ int ret = 0;
if (!pwrdm || !arch_pwrdm)
return -EINVAL;
- ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);
+ if (!(pwrdm->flags & PWRDM_ACTIVE_WITH_KERNEL))
+ ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);
+
if (!ret)
_pwrdm_state_switch(pwrdm);
diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h
index f4a189a..10941fd 100644
--- a/arch/arm/mach-omap2/powerdomain.h
+++ b/arch/arm/mach-omap2/powerdomain.h
@@ -78,10 +78,14 @@ enum pwrdm_func_state {
*
* PWRDM_HAS_LOWPOWERSTATECHANGE - can transition from a sleep state
* to a lower sleep state without waking up the powerdomain
+ *
+ * PWRDM_ACTIVE_WITH_KERNEL - this powerdomain's current power state is
+ * guaranteed to be ON whenever the kernel is running
*/
#define PWRDM_HAS_HDWR_SAR BIT(0)
#define PWRDM_HAS_MPU_QUIRK BIT(1)
#define PWRDM_HAS_LOWPOWERSTATECHANGE BIT(2)
+#define PWRDM_ACTIVE_WITH_KERNEL BIT(3)
/*
* Powerdomain internal flags (struct powerdomain._flags)
diff --git a/arch/arm/mach-omap2/powerdomains2xxx_data.c b/arch/arm/mach-omap2/powerdomains2xxx_data.c
index 578eef8..112927f 100644
--- a/arch/arm/mach-omap2/powerdomains2xxx_data.c
+++ b/arch/arm/mach-omap2/powerdomains2xxx_data.c
@@ -54,6 +54,7 @@ static struct powerdomain mpu_24xx_pwrdm = {
[0] = PWRSTS_ON,
},
.voltdm = { .name = "core" },
+ .flags = PWRDM_ACTIVE_WITH_KERNEL,
};
static struct powerdomain core_24xx_pwrdm = {
@@ -73,6 +74,7 @@ static struct powerdomain core_24xx_pwrdm = {
[2] = PWRSTS_OFF_RET_ON, /* MEM3ONSTATE */
},
.voltdm = { .name = "core" },
+ .flags = PWRDM_ACTIVE_WITH_KERNEL,
};
diff --git a/arch/arm/mach-omap2/powerdomains33xx_data.c b/arch/arm/mach-omap2/powerdomains33xx_data.c
index 869adb8..acb148a 100644
--- a/arch/arm/mach-omap2/powerdomains33xx_data.c
+++ b/arch/arm/mach-omap2/powerdomains33xx_data.c
@@ -123,7 +123,8 @@ static struct powerdomain mpu_33xx_pwrdm = {
.pwrstst_offs = AM33XX_PM_MPU_PWRSTST_OFFSET,
.pwrsts = PWRSTS_OFF_RET_ON,
.pwrsts_logic_ret = PWRSTS_OFF_RET,
- .flags = PWRDM_HAS_LOWPOWERSTATECHANGE,
+ .flags = (PWRDM_HAS_LOWPOWERSTATECHANGE |
+ PWRDM_ACTIVE_WITH_KERNEL),
.banks = 3,
.logicretstate_mask = AM33XX_LOGICRETSTATE_MASK,
.mem_on_mask = {
diff --git a/arch/arm/mach-omap2/powerdomains3xxx_data.c b/arch/arm/mach-omap2/powerdomains3xxx_data.c
index f0e14e9ef..ade93d3 100644
--- a/arch/arm/mach-omap2/powerdomains3xxx_data.c
+++ b/arch/arm/mach-omap2/powerdomains3xxx_data.c
@@ -58,7 +58,7 @@ static struct powerdomain mpu_3xxx_pwrdm = {
.prcm_offs = MPU_MOD,
.pwrsts = PWRSTS_OFF_RET_ON,
.pwrsts_logic_ret = PWRSTS_OFF_RET,
- .flags = PWRDM_HAS_MPU_QUIRK,
+ .flags = (PWRDM_HAS_MPU_QUIRK | PWRDM_ACTIVE_WITH_KERNEL),
.banks = 1,
.pwrsts_mem_ret = {
[0] = PWRSTS_OFF_RET,
@@ -74,7 +74,7 @@ static struct powerdomain mpu_am35x_pwrdm = {
.prcm_offs = MPU_MOD,
.pwrsts = PWRSTS_ON,
.pwrsts_logic_ret = PWRSTS_ON,
- .flags = PWRDM_HAS_MPU_QUIRK,
+ .flags = (PWRDM_HAS_MPU_QUIRK | PWRDM_ACTIVE_WITH_KERNEL),
.banks = 1,
.pwrsts_mem_ret = {
[0] = PWRSTS_ON,
@@ -110,6 +110,7 @@ static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
[1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */
},
.voltdm = { .name = "core" },
+ .flags = PWRDM_ACTIVE_WITH_KERNEL,
};
static struct powerdomain core_3xxx_es3_1_pwrdm = {
@@ -121,7 +122,8 @@ static struct powerdomain core_3xxx_es3_1_pwrdm = {
* Setting the SAR flag for errata ID i478 which applies
* to 3430 <= ES3.1
*/
- .flags = PWRDM_HAS_HDWR_SAR, /* for USBTLL only */
+ .flags = (PWRDM_HAS_HDWR_SAR | /* for USBTLL only */
+ PWRDM_ACTIVE_WITH_KERNEL),
.banks = 2,
.pwrsts_mem_ret = {
[0] = PWRSTS_OFF_RET, /* MEM1RETSTATE */
@@ -149,6 +151,7 @@ static struct powerdomain core_am35x_pwrdm = {
[1] = PWRSTS_ON, /* MEM2ONSTATE */
},
.voltdm = { .name = "core" },
+ .flags = PWRDM_ACTIVE_WITH_KERNEL,
};
static struct powerdomain dss_pwrdm = {
diff --git a/arch/arm/mach-omap2/powerdomains44xx_data.c b/arch/arm/mach-omap2/powerdomains44xx_data.c
index 704664c..b64213c 100644
--- a/arch/arm/mach-omap2/powerdomains44xx_data.c
+++ b/arch/arm/mach-omap2/powerdomains44xx_data.c
@@ -53,7 +53,8 @@ static struct powerdomain core_44xx_pwrdm = {
[3] = PWRSTS_ON, /* ducati_l2ram */
[4] = PWRSTS_ON, /* ducati_unicache */
},
- .flags = PWRDM_HAS_LOWPOWERSTATECHANGE,
+ .flags = (PWRDM_HAS_LOWPOWERSTATECHANGE |
+ PWRDM_ACTIVE_WITH_KERNEL),
};
/* gfx_44xx_pwrdm: 3D accelerator power domain */
@@ -164,6 +165,7 @@ static struct powerdomain cpu0_44xx_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRSTS_ON, /* cpu0_l1 */
},
+ .flags = PWRDM_ACTIVE_WITH_KERNEL,
};
/* cpu1_44xx_pwrdm: MPU1 processor and Neon coprocessor power domain */
@@ -218,6 +220,7 @@ static struct powerdomain mpu_44xx_pwrdm = {
[1] = PWRSTS_ON, /* mpu_l2 */
[2] = PWRSTS_ON, /* mpu_ram */
},
+ .flags = PWRDM_ACTIVE_WITH_KERNEL,
};
/* ivahd_44xx_pwrdm: IVA-HD power domain */
--
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