diff options
author | Jon Hunter <jon-hunter@ti.com> | 2012-07-04 03:45:53 -0600 |
---|---|---|
committer | Paul Walmsley <paul@pwsan.com> | 2012-07-04 03:45:53 -0600 |
commit | 65aa94b204dcecca01521e2a4a57e44892632b47 (patch) | |
tree | b66136d2ca9b333a9cb4ae2283ff23381760743a | |
parent | 6887a4131da3adaab011613776d865f4bcfb5678 (diff) |
ARM: OMAP4: clockdomain/CM code: Update supported transition modes
For OMAP3+ devices, the clock domains (CLKDMs) support one or more of the
following transition modes ...
NO_SLEEP (0x0) - A clock domain sleep transition is never initiated,
irrespective of the hardware conditions.
SW_SLEEP (0x1) - A software-forced sleep transition. The transition is initiated
when the associated hardware conditions are satisfied
SW_WKUP (0x2) - A software-forced clock domain wake-up transition is initiated,
irrespective of the hardware conditions.
HW_AUTO (0x3) - Hardware-controlled automatic sleep and wake-up transition is
initiated by the PRCM module when the associated hardware
conditions are satisfied.
For OMAP4 devices, SW_SLEEP is equivalent to HW_AUTO and NO_SLEEP is equivalent
to SW_WKUP. The only difference between HW_AUTO and SW_SLEEP for OMAP4 devices
is that the PRM_IRQSTATUS_MPU.TRANSITION_ST interrupt status is set in case of
SW_SLEEP transition, and not set in case of HW_AUTO transition.
For OMAP4 devices, all CLKDMs support HW_AUTO and therefore we can place the
CLKDMs in the HW_AUTO state instead of the SW_SLEEP mode. Hence, we do not
need to use the SW_SLEEP mode. With regard to NO_SLEEP and SW_WKUP it is
preferred to use SW_WKUP mode if the CLKDM supports it and so use this mode
instead of NO_SLEEP where possible.
For a software perspective the above 4 modes are represented by the following
flags to indicate what modes are supported by each of the CLKDMs.
CLKDM_CAN_DISABLE_AUTO --> NO_SLEEP
CLKDM_CAN_ENABLE_AUTO --> HW_AUTO
CLKDM_CAN_FORCE_SLEEP --> SW_SLEEP
CLKDM_CAN_FORCE_WAKEUP --> SW_WKUP
By eliminating the SW_SLEEP mode the the mapping of the flags for OMAP4 devices
can becomes ...
CLKDM_CAN_DISABLE_AUTO --> NO_SLEEP
CLKDM_CAN_ENABLE_AUTO --> HW_AUTO
CLKDM_CAN_FORCE_SLEEP --> HW_AUTO
CLKDM_CAN_FORCE_WAKEUP --> SW_WKUP
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@ti.com>
Reviewed-by: Benoit Cousson <b-cousson@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
-rw-r--r-- | arch/arm/mach-omap2/clockdomain44xx.c | 10 | ||||
-rw-r--r-- | arch/arm/mach-omap2/cminst44xx.c | 14 |
2 files changed, 7 insertions, 17 deletions
diff --git a/arch/arm/mach-omap2/clockdomain44xx.c b/arch/arm/mach-omap2/clockdomain44xx.c index 4f04dd11d65..762f2cc542c 100644 --- a/arch/arm/mach-omap2/clockdomain44xx.c +++ b/arch/arm/mach-omap2/clockdomain44xx.c @@ -70,7 +70,7 @@ static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm) static int omap4_clkdm_sleep(struct clockdomain *clkdm) { - omap4_cminst_clkdm_force_sleep(clkdm->prcm_partition, + omap4_cminst_clkdm_enable_hwsup(clkdm->prcm_partition, clkdm->cm_inst, clkdm->clkdm_offs); return 0; } @@ -90,8 +90,12 @@ static void omap4_clkdm_allow_idle(struct clockdomain *clkdm) static void omap4_clkdm_deny_idle(struct clockdomain *clkdm) { - omap4_cminst_clkdm_disable_hwsup(clkdm->prcm_partition, - clkdm->cm_inst, clkdm->clkdm_offs); + if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP) + omap4_clkdm_wakeup(clkdm); + else + omap4_cminst_clkdm_disable_hwsup(clkdm->prcm_partition, + clkdm->cm_inst, + clkdm->clkdm_offs); } static int omap4_clkdm_clk_enable(struct clockdomain *clkdm) diff --git a/arch/arm/mach-omap2/cminst44xx.c b/arch/arm/mach-omap2/cminst44xx.c index 1a39945d9ff..1894015ff04 100644 --- a/arch/arm/mach-omap2/cminst44xx.c +++ b/arch/arm/mach-omap2/cminst44xx.c @@ -235,20 +235,6 @@ void omap4_cminst_clkdm_disable_hwsup(u8 part, s16 inst, u16 cdoffs) } /** - * omap4_cminst_clkdm_force_sleep - try to put a clockdomain into idle - * @part: PRCM partition ID that the clockdomain registers exist in - * @inst: CM instance register offset (*_INST macro) - * @cdoffs: Clockdomain register offset (*_CDOFFS macro) - * - * Put a clockdomain referred to by (@part, @inst, @cdoffs) into idle - * No return value. - */ -void omap4_cminst_clkdm_force_sleep(u8 part, s16 inst, u16 cdoffs) -{ - _clktrctrl_write(OMAP34XX_CLKSTCTRL_FORCE_SLEEP, part, inst, cdoffs); -} - -/** * omap4_cminst_clkdm_force_sleep - try to take a clockdomain out of idle * @part: PRCM partition ID that the clockdomain registers exist in * @inst: CM instance register offset (*_INST macro) |