For pwrdm's which support LOWPOWERSTATECHANGE, do not try waking up the domain to put it back to deeper sleep state.
Signed-off-by: Rajendra Nayak <[email protected]> Signed-off-by: Santosh Shilimkar <[email protected]> Acked-by: Benoit Cousson <[email protected]> Cc: Kevin Hilman <[email protected]> Cc: Paul Walmsley <[email protected]> --- Changes in v2: Changed implementation for better readability and code reuse as suggested here http://marc.info/?l=linux-omap&m=129245686306262&w=2 The below branch is updated with this version of the patch git://gitorious.org/omap-pm/linux.git for_2.6.38/power arch/arm/mach-omap2/pm.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-) Index: linux/arch/arm/mach-omap2/pm.c =================================================================== --- linux.orig/arch/arm/mach-omap2/pm.c 2010-12-15 17:29:42.361228780 +0530 +++ linux/arch/arm/mach-omap2/pm.c 2010-12-15 20:19:48.321228780 +0530 @@ -89,6 +89,10 @@ } } +/* Types of sleep_switch used in omap_set_pwrdm_state */ +#define FORCEWAKEUP_SWITCH 0 +#define LOWPOWERSTATE_SWITCH 1 + /* * This sets pwrdm state (other than mpu & core. Currently only ON & * RET are supported. Function is assuming that clkdm doesn't have @@ -114,9 +118,14 @@ return ret; if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) { - omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]); - sleep_switch = 1; - pwrdm_wait_transition(pwrdm); + if ((pwrdm_read_pwrst(pwrdm) > state) && + (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) { + sleep_switch = LOWPOWERSTATE_SWITCH; + } else { + omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]); + pwrdm_wait_transition(pwrdm); + sleep_switch = FORCEWAKEUP_SWITCH; + } } ret = pwrdm_set_next_pwrst(pwrdm, state); @@ -126,12 +135,19 @@ goto err; } - if (sleep_switch) { + switch (sleep_switch) { + case FORCEWAKEUP_SWITCH: omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]); - pwrdm_wait_transition(pwrdm); - pwrdm_state_switch(pwrdm); + break; + case LOWPOWERSTATE_SWITCH: + pwrdm_set_lowpwrstchange(pwrdm); + break; + default: + return ret; } + pwrdm_wait_transition(pwrdm); + pwrdm_state_switch(pwrdm); err: return ret; } -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
