diff options
Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap-2.6.39/pm/linux-omap-2.6.39-ti-pm-wip-cpuidle/0004-OMAP2-PM-idle-clkdms-only-if-already-in-idle.patch')
| -rw-r--r-- | extras/recipes-kernel/linux/linux-omap-2.6.39/pm/linux-omap-2.6.39-ti-pm-wip-cpuidle/0004-OMAP2-PM-idle-clkdms-only-if-already-in-idle.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap-2.6.39/pm/linux-omap-2.6.39-ti-pm-wip-cpuidle/0004-OMAP2-PM-idle-clkdms-only-if-already-in-idle.patch b/extras/recipes-kernel/linux/linux-omap-2.6.39/pm/linux-omap-2.6.39-ti-pm-wip-cpuidle/0004-OMAP2-PM-idle-clkdms-only-if-already-in-idle.patch new file mode 100644 index 00000000..16eedf9a --- /dev/null +++ b/extras/recipes-kernel/linux/linux-omap-2.6.39/pm/linux-omap-2.6.39-ti-pm-wip-cpuidle/0004-OMAP2-PM-idle-clkdms-only-if-already-in-idle.patch @@ -0,0 +1,50 @@ +From cec133850aa42c03d912c764aaa441677e782eca Mon Sep 17 00:00:00 2001 +From: Rajendra Nayak <rnayak@ti.com> +Date: Tue, 5 Apr 2011 15:22:48 +0530 +Subject: [PATCH 4/6] OMAP2+: PM: idle clkdms only if already in idle + +The omap_set_pwrdm_state function forces clockdomains +to idle, without checking the existing idle state +programmed, instead based solely on the HW capability +of the clockdomain to support idle. +This is wrong and the clockdomains should be idled +post a state_switch *only* if idle transitions on the +clockdomain were already enabled. + +Signed-off-by: Rajendra Nayak <rnayak@ti.com> +--- + arch/arm/mach-omap2/pm.c | 4 +++- + 1 files changed, 3 insertions(+), 1 deletions(-) + +diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c +index d48813f..840b0e1 100644 +--- a/arch/arm/mach-omap2/pm.c ++++ b/arch/arm/mach-omap2/pm.c +@@ -108,6 +108,7 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) + u32 cur_state; + int sleep_switch = -1; + int ret = 0; ++ int hwsup = 0; + + if (pwrdm == NULL || IS_ERR(pwrdm)) + return -EINVAL; +@@ -127,6 +128,7 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) + (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) { + sleep_switch = LOWPOWERSTATE_SWITCH; + } else { ++ hwsup = clkdm_is_idle(pwrdm->pwrdm_clkdms[0]); + clkdm_wakeup(pwrdm->pwrdm_clkdms[0]); + pwrdm_wait_transition(pwrdm); + sleep_switch = FORCEWAKEUP_SWITCH; +@@ -142,7 +144,7 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) + + switch (sleep_switch) { + case FORCEWAKEUP_SWITCH: +- if (pwrdm->pwrdm_clkdms[0]->flags & CLKDM_CAN_ENABLE_AUTO) ++ if (hwsup) + clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]); + else + clkdm_sleep(pwrdm->pwrdm_clkdms[0]); +-- +1.6.6.1 + |