From: Tero Kristo <tero.kristo@xxxxxxxxx>
Currently only ON, RET and OFF are supported, and ON is arguably broken as it
allows the powerdomain to enter INACTIVE state unless idle is prevented.
Now, pwrdm code prevents idle if ON is selected and hardware supervised
mode for the underlying clockdomain is enabled, and also adds support for
INACTIVE. This simplifies the control needed inside sleep code.
This patch also requires caching of next power state inside powerdomain code,
as INACTIVE is not directly supported by hardware. Next powerstate is thus
now stored for each powerdomain in next_state.
Signed-off-by: Tero Kristo <tero.kristo@xxxxxxxxx>
---
arch/arm/mach-omap2/powerdomain.c | 37 +++++++++++++++++++++----
arch/arm/mach-omap2/powerdomains34xx.h | 18 ++++++------
arch/arm/plat-omap/include/plat/powerdomain.h | 5 +++
3 files changed, 45 insertions(+), 15 deletions(-)
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index 26b3f3e..bdfbbea 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -110,8 +110,8 @@ static struct powerdomain *_pwrdm_deps_lookup(struct powerdomain *pwrdm,
static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
{
- int prev;
- int state;
+ u8 prev;
+ u8 state;
if (pwrdm == NULL)
return -EINVAL;
@@ -218,7 +218,9 @@ int pwrdm_register(struct powerdomain *pwrdm)
pr_debug("powerdomain: registered %s\n", pwrdm->name);
ret = 0;
-
+ pwrdm->next_state =
+ prm_read_mod_bits_shift(pwrdm->prcm_offs, PM_PWSTCTRL,
+ OMAP_POWERSTATE_MASK);
pr_unlock:
write_unlock_irqrestore(&pwrdm_rwlock, flags);
@@ -699,19 +701,43 @@ int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm)
*/
int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
{
+ u8 prg_pwrst;
+
if (!pwrdm)
return -EINVAL;
+ if (pwrdm->next_state == pwrst)
+ return 0;
+
if (!(pwrdm->pwrsts & (1 << pwrst)))
return -EINVAL;
pr_debug("powerdomain: setting next powerstate for %s to %0x\n",
pwrdm->name, pwrst);
+ /* INACTIVE is reserved, so we program pwrdm as ON */
+ if (pwrst == PWRDM_POWER_INACTIVE)
+ prg_pwrst = PWRDM_POWER_ON;
+ else
+ prg_pwrst = pwrst;
+
prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK,
- (pwrst << OMAP_POWERSTATE_SHIFT),
+ (prg_pwrst << OMAP_POWERSTATE_SHIFT),
pwrdm->prcm_offs, PM_PWSTCTRL);
+ /* If next state is ON, prevent idle */
+ if (pwrst == PWRDM_POWER_ON) {
+ if (omap2_clkdm_get_hwsup(pwrdm->pwrdm_clkdms[0])) {
+ omap2_clkdm_deny_idle(pwrdm->pwrdm_clkdms[0]);
+ pwrdm->hwsup_changed = 1;
+ }
+ } else if (pwrdm->hwsup_changed) {
+ omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
+ pwrdm->hwsup_changed = 0;
+ }
+
+ pwrdm->next_state = pwrst;
+
return 0;
}
@@ -728,8 +754,7 @@ int pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
if (!pwrdm)
return -EINVAL;
- return prm_read_mod_bits_shift(pwrdm->prcm_offs, PM_PWSTCTRL,
- OMAP_POWERSTATE_MASK);
+ return pwrdm->next_state;
}
/**
diff --git a/arch/arm/mach-omap2/powerdomains34xx.h b/arch/arm/mach-omap2/powerdomains34xx.h
index 588f7e0..7a7d8d3 100644
--- a/arch/arm/mach-omap2/powerdomains34xx.h
+++ b/arch/arm/mach-omap2/powerdomains34xx.h
@@ -165,7 +165,7 @@ static struct powerdomain iva2_pwrdm = {
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
.dep_bit = OMAP3430_PM_WKDEP_MPU_EN_IVA2_SHIFT,
.wkdep_srcs = iva2_wkdeps,
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.pwrsts_logic_ret = PWRSTS_OFF_RET,
.banks = 4,
.pwrsts_mem_ret = {
@@ -188,7 +188,7 @@ static struct powerdomain mpu_34xx_pwrdm = {
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
.dep_bit = OMAP3430_EN_MPU_SHIFT,
.wkdep_srcs = mpu_34xx_wkdeps,
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.pwrsts_logic_ret = PWRSTS_OFF_RET,
.flags = PWRDM_HAS_MPU_QUIRK,
.banks = 1,
@@ -207,7 +207,7 @@ static struct powerdomain core_34xx_pre_es3_1_pwrdm = {
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES1 |
CHIP_IS_OMAP3430ES2 |
CHIP_IS_OMAP3430ES3_0),
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.dep_bit = OMAP3430_EN_CORE_SHIFT,
.banks = 2,
.pwrsts_mem_ret = {
@@ -225,7 +225,7 @@ static struct powerdomain core_34xx_es3_1_pwrdm = {
.name = "core_pwrdm",
.prcm_offs = CORE_MOD,
.omap_chip = OMAP_CHIP_INIT(CHIP_GE_OMAP3430ES3_1),
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.dep_bit = OMAP3430_EN_CORE_SHIFT,
.flags = PWRDM_HAS_HDWR_SAR, /* for USBTLL only */
.banks = 2,
@@ -247,7 +247,7 @@ static struct powerdomain dss_pwrdm = {
.dep_bit = OMAP3430_PM_WKDEP_MPU_EN_DSS_SHIFT,
.wkdep_srcs = cam_dss_wkdeps,
.sleepdep_srcs = dss_per_usbhost_sleepdeps,
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.pwrsts_logic_ret = PWRDM_POWER_RET,
.banks = 1,
.pwrsts_mem_ret = {
@@ -287,7 +287,7 @@ static struct powerdomain cam_pwrdm = {
.prcm_offs = OMAP3430_CAM_MOD,
.wkdep_srcs = cam_dss_wkdeps,
.sleepdep_srcs = cam_gfx_sleepdeps,
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.pwrsts_logic_ret = PWRDM_POWER_RET,
.banks = 1,
.pwrsts_mem_ret = {
@@ -305,7 +305,7 @@ static struct powerdomain per_pwrdm = {
.dep_bit = OMAP3430_EN_PER_SHIFT,
.wkdep_srcs = per_usbhost_wkdeps,
.sleepdep_srcs = dss_per_usbhost_sleepdeps,
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.pwrsts_logic_ret = PWRSTS_OFF_RET,
.banks = 1,
.pwrsts_mem_ret = {
@@ -327,7 +327,7 @@ static struct powerdomain neon_pwrdm = {
.prcm_offs = OMAP3430_NEON_MOD,
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
.wkdep_srcs = neon_wkdeps,
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.pwrsts_logic_ret = PWRDM_POWER_RET,
};
@@ -337,7 +337,7 @@ static struct powerdomain usbhost_pwrdm = {
.omap_chip = OMAP_CHIP_INIT(CHIP_GE_OMAP3430ES2),
.wkdep_srcs = per_usbhost_wkdeps,
.sleepdep_srcs = dss_per_usbhost_sleepdeps,
- .pwrsts = PWRSTS_OFF_RET_ON,
+ .pwrsts = PWRSTS_OFF_RET_INA_ON,
.pwrsts_logic_ret = PWRDM_POWER_RET,
/*
* REVISIT: Enabling usb host save and restore mechanism seems to
diff --git a/arch/arm/plat-omap/include/plat/powerdomain.h b/arch/arm/plat-omap/include/plat/powerdomain.h
index 0b96005..17377c3 100644
--- a/arch/arm/plat-omap/include/plat/powerdomain.h
+++ b/arch/arm/plat-omap/include/plat/powerdomain.h
@@ -39,6 +39,9 @@
#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON))
+#define PWRSTS_OFF_RET_INA_ON (PWRSTS_OFF_RET_ON | \
+ (1 << PWRDM_POWER_INACTIVE))
+
/* Powerdomain flags */
#define PWRDM_HAS_HDWR_SAR (1 << 0) /* hardware save-and-restore support */
@@ -123,6 +126,8 @@ struct powerdomain {
struct list_head node;
int state;
+ int next_state;
+ int hwsup_changed;
unsigned state_counter[PWRDM_MAX_PWRSTS];
#ifdef CONFIG_PM_DEBUG
--
1.5.4.3
--
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