diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/clockdomain.c | 30 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clockdomain.h | 6 |
2 files changed, 34 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c index 5a57de563b30..239b558853f5 100644 --- a/arch/arm/mach-omap2/clockdomain.c +++ b/arch/arm/mach-omap2/clockdomain.c @@ -1,8 +1,8 @@ /* * OMAP2/3/4 clockdomain framework functions * - * Copyright (C) 2008-2010 Texas Instruments, Inc. - * Copyright (C) 2008-2010 Nokia Corporation + * Copyright (C) 2008-2011 Texas Instruments, Inc. + * Copyright (C) 2008-2011 Nokia Corporation * * Written by Paul Walmsley and Jouni Högander * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com> @@ -704,6 +704,8 @@ int clkdm_sleep(struct clockdomain *clkdm) pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name); + clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED; + return arch_clkdm->clkdm_sleep(clkdm); } @@ -732,6 +734,8 @@ int clkdm_wakeup(struct clockdomain *clkdm) pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name); + clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED; + return arch_clkdm->clkdm_wakeup(clkdm); } @@ -762,6 +766,8 @@ void clkdm_allow_idle(struct clockdomain *clkdm) pr_debug("clockdomain: enabling automatic idle transitions for %s\n", clkdm->name); + clkdm->_flags |= _CLKDM_FLAG_HWSUP_ENABLED; + arch_clkdm->clkdm_allow_idle(clkdm); pwrdm_clkdm_state_switch(clkdm); } @@ -792,9 +798,29 @@ void clkdm_deny_idle(struct clockdomain *clkdm) pr_debug("clockdomain: disabling automatic idle transitions for %s\n", clkdm->name); + clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED; + arch_clkdm->clkdm_deny_idle(clkdm); } +/** + * clkdm_in_hwsup - is clockdomain @clkdm have hardware-supervised idle enabled? + * @clkdm: struct clockdomain * + * + * Returns true if clockdomain @clkdm currently has + * hardware-supervised idle enabled, or false if it does not or if + * @clkdm is NULL. It is only valid to call this function after + * clkdm_init() has been called. This function does not actually read + * bits from the hardware; it instead tests an in-memory flag that is + * changed whenever the clockdomain code changes the auto-idle mode. + */ +bool clkdm_in_hwsup(struct clockdomain *clkdm) +{ + if (!clkdm) + return false; + + return (clkdm->_flags & _CLKDM_FLAG_HWSUP_ENABLED) ? true : false; +} /* Clockdomain-to-clock/hwmod framework interface code */ diff --git a/arch/arm/mach-omap2/clockdomain.h b/arch/arm/mach-omap2/clockdomain.h index 8e0da642355c..8782a5cadfa6 100644 --- a/arch/arm/mach-omap2/clockdomain.h +++ b/arch/arm/mach-omap2/clockdomain.h @@ -83,6 +83,9 @@ struct clkdm_dep { const struct omap_chip_id omap_chip; }; +/* Possible flags for struct clockdomain._flags */ +#define _CLKDM_FLAG_HWSUP_ENABLED BIT(0) + /** * struct clockdomain - OMAP clockdomain * @name: clockdomain name @@ -90,6 +93,7 @@ struct clkdm_dep { * @clktrctrl_reg: CLKSTCTRL reg for the given clock domain * @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg * @flags: Clockdomain capability flags + * @_flags: Flags for use only by internal clockdomain code * @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit * @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers * @cm_inst: (OMAP4 only) CM instance register offset @@ -114,6 +118,7 @@ struct clockdomain { } pwrdm; const u16 clktrctrl_mask; const u8 flags; + u8 _flags; const u8 dep_bit; const u8 prcm_partition; const s16 cm_inst; @@ -178,6 +183,7 @@ int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm); void clkdm_allow_idle(struct clockdomain *clkdm); void clkdm_deny_idle(struct clockdomain *clkdm); +bool clkdm_in_hwsup(struct clockdomain *clkdm); int clkdm_wakeup(struct clockdomain *clkdm); int clkdm_sleep(struct clockdomain *clkdm); |
