diff options
Diffstat (limited to 'arch/arm/mach-omap2/powerdomain.c')
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 259 |
1 files changed, 2 insertions, 257 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index c0de05097b5..e8e8d8872a0 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -2,7 +2,7 @@ * OMAP powerdomain control * * Copyright (C) 2007-2008 Texas Instruments, Inc. - * Copyright (C) 2007-2008 Nokia Corporation + * Copyright (C) 2007-2009 Nokia Corporation * * Written by Paul Walmsley * @@ -36,6 +36,7 @@ #include <plat/cpu.h> #include <plat/powerdomain.h> #include <plat/clockdomain.h> +#include <plat/prcm.h> #include "pm.h" @@ -88,17 +89,6 @@ static DEFINE_RWLOCK(pwrdm_rwlock); /* Private functions */ -static u32 prm_read_mod_bits_shift(s16 domain, s16 idx, u32 mask) -{ - u32 v; - - v = prm_read_mod_reg(domain, idx); - v &= mask; - v >>= __ffs(mask); - - return v; -} - static struct powerdomain *_pwrdm_lookup(const char *name) { struct powerdomain *pwrdm, *temp_pwrdm; @@ -115,34 +105,6 @@ static struct powerdomain *_pwrdm_lookup(const char *name) return pwrdm; } -/* _pwrdm_deps_lookup - look up the specified powerdomain in a pwrdm list */ -static struct powerdomain *_pwrdm_deps_lookup(struct powerdomain *pwrdm, - struct pwrdm_dep *deps) -{ - struct pwrdm_dep *pd; - - if (!pwrdm || !deps || !omap_chip_is(pwrdm->omap_chip)) - return ERR_PTR(-EINVAL); - - for (pd = deps; pd->pwrdm_name; pd++) { - - if (!omap_chip_is(pd->omap_chip)) - continue; - - if (!pd->pwrdm && pd->pwrdm_name) - pd->pwrdm = pwrdm_lookup(pd->pwrdm_name); - - if (pd->pwrdm == pwrdm) - break; - - } - - if (!pd->pwrdm_name) - return ERR_PTR(-ENOENT); - - return pd->pwrdm; -} - static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) { @@ -502,223 +464,6 @@ int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, return ret; } - -/** - * pwrdm_add_wkdep - add a wakeup dependency from pwrdm2 to pwrdm1 - * @pwrdm1: wake this struct powerdomain * up (dependent) - * @pwrdm2: when this struct powerdomain * wakes up (source) - * - * When the powerdomain represented by pwrdm2 wakes up (due to an - * interrupt), wake up pwrdm1. Implemented in hardware on the OMAP, - * this feature is designed to reduce wakeup latency of the dependent - * powerdomain. Returns -EINVAL if presented with invalid powerdomain - * pointers, -ENOENT if pwrdm2 cannot wake up pwrdm1 in hardware, or - * 0 upon success. - */ -int pwrdm_add_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->wkdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear wake up of " - "%s when %s wakes up\n", pwrdm1->name, pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: hardware will wake up %s when %s wakes up\n", - pwrdm1->name, pwrdm2->name); - - prm_set_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, PM_WKDEP); - - return 0; -} - -/** - * pwrdm_del_wkdep - remove a wakeup dependency from pwrdm2 to pwrdm1 - * @pwrdm1: wake this struct powerdomain * up (dependent) - * @pwrdm2: when this struct powerdomain * wakes up (source) - * - * Remove a wakeup dependency that causes pwrdm1 to wake up when pwrdm2 - * wakes up. Returns -EINVAL if presented with invalid powerdomain - * pointers, -ENOENT if pwrdm2 cannot wake up pwrdm1 in hardware, or - * 0 upon success. - */ -int pwrdm_del_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->wkdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear wake up of " - "%s when %s wakes up\n", pwrdm1->name, pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: hardware will no longer wake up %s after %s " - "wakes up\n", pwrdm1->name, pwrdm2->name); - - prm_clear_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, PM_WKDEP); - - return 0; -} - -/** - * pwrdm_read_wkdep - read wakeup dependency state from pwrdm2 to pwrdm1 - * @pwrdm1: wake this struct powerdomain * up (dependent) - * @pwrdm2: when this struct powerdomain * wakes up (source) - * - * Return 1 if a hardware wakeup dependency exists wherein pwrdm1 will be - * awoken when pwrdm2 wakes up; 0 if dependency is not set; -EINVAL - * if either powerdomain pointer is invalid; or -ENOENT if the hardware - * is incapable. - * - * REVISIT: Currently this function only represents software-controllable - * wakeup dependencies. Wakeup dependencies fixed in hardware are not - * yet handled here. - */ -int pwrdm_read_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->wkdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear wake up of " - "%s when %s wakes up\n", pwrdm1->name, pwrdm2->name); - return PTR_ERR(p); - } - - return prm_read_mod_bits_shift(pwrdm1->prcm_offs, PM_WKDEP, - (1 << pwrdm2->dep_bit)); -} - -/** - * pwrdm_add_sleepdep - add a sleep dependency from pwrdm2 to pwrdm1 - * @pwrdm1: prevent this struct powerdomain * from sleeping (dependent) - * @pwrdm2: when this struct powerdomain * is active (source) - * - * Prevent pwrdm1 from automatically going inactive (and then to - * retention or off) if pwrdm2 is still active. Returns -EINVAL if - * presented with invalid powerdomain pointers or called on a machine - * that does not support software-configurable hardware sleep dependencies, - * -ENOENT if the specified dependency cannot be set in hardware, or - * 0 upon success. - */ -int pwrdm_add_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!cpu_is_omap34xx()) - return -EINVAL; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->sleepdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear sleep " - "dependency affecting %s from %s\n", pwrdm1->name, - pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: will prevent %s from sleeping if %s is active\n", - pwrdm1->name, pwrdm2->name); - - cm_set_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, OMAP3430_CM_SLEEPDEP); - - return 0; -} - -/** - * pwrdm_del_sleepdep - remove a sleep dependency from pwrdm2 to pwrdm1 - * @pwrdm1: prevent this struct powerdomain * from sleeping (dependent) - * @pwrdm2: when this struct powerdomain * is active (source) - * - * Allow pwrdm1 to automatically go inactive (and then to retention or - * off), independent of the activity state of pwrdm2. Returns -EINVAL - * if presented with invalid powerdomain pointers or called on a machine - * that does not support software-configurable hardware sleep dependencies, - * -ENOENT if the specified dependency cannot be cleared in hardware, or - * 0 upon success. - */ -int pwrdm_del_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!cpu_is_omap34xx()) - return -EINVAL; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->sleepdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear sleep " - "dependency affecting %s from %s\n", pwrdm1->name, - pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: will no longer prevent %s from sleeping if " - "%s is active\n", pwrdm1->name, pwrdm2->name); - - cm_clear_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, OMAP3430_CM_SLEEPDEP); - - return 0; -} - -/** - * pwrdm_read_sleepdep - read sleep dependency state from pwrdm2 to pwrdm1 - * @pwrdm1: prevent this struct powerdomain * from sleeping (dependent) - * @pwrdm2: when this struct powerdomain * is active (source) - * - * Return 1 if a hardware sleep dependency exists wherein pwrdm1 will - * not be allowed to automatically go inactive if pwrdm2 is active; - * 0 if pwrdm1's automatic power state inactivity transition is independent - * of pwrdm2's; -EINVAL if either powerdomain pointer is invalid or called - * on a machine that does not support software-configurable hardware sleep - * dependencies; or -ENOENT if the hardware is incapable. - * - * REVISIT: Currently this function only represents software-controllable - * sleep dependencies. Sleep dependencies fixed in hardware are not - * yet handled here. - */ -int pwrdm_read_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!cpu_is_omap34xx()) - return -EINVAL; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->sleepdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear sleep " - "dependency affecting %s from %s\n", pwrdm1->name, - pwrdm2->name); - return PTR_ERR(p); - } - - return prm_read_mod_bits_shift(pwrdm1->prcm_offs, OMAP3430_CM_SLEEPDEP, - (1 << pwrdm2->dep_bit)); -} - /** * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain * @pwrdm: struct powerdomain * |