diff options
Diffstat (limited to 'arch/arm/mach-omap2/powerdomain.c')
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 71 |
1 files changed, 66 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index eaed0df1669..9af08473bf1 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) 2007-2009 Nokia Corporation + * Copyright (C) 2007-2011 Nokia Corporation * * Written by Paul Walmsley * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com> @@ -19,12 +19,15 @@ #include <linux/list.h> #include <linux/errno.h> #include <linux/string.h> +#include <trace/events/power.h> + #include "cm2xxx_3xxx.h" #include "prcm44xx.h" #include "cm44xx.h" #include "prm2xxx_3xxx.h" #include "prm44xx.h" +#include <asm/cpu.h> #include <plat/cpu.h> #include "powerdomain.h" #include "clockdomain.h" @@ -32,6 +35,8 @@ #include "pm.h" +#define PWRDM_TRACE_STATES_FLAG (1<<31) + enum { PWRDM_STATE_NOW = 0, PWRDM_STATE_PREV, @@ -130,8 +135,7 @@ static void _update_logic_membank_counters(struct powerdomain *pwrdm) static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) { - int prev; - int state; + int prev, state, trace_state = 0; if (pwrdm == NULL) return -EINVAL; @@ -148,6 +152,17 @@ static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) pwrdm->state_counter[prev]++; if (prev == PWRDM_POWER_RET) _update_logic_membank_counters(pwrdm); + /* + * If the power domain did not hit the desired state, + * generate a trace event with both the desired and hit states + */ + if (state != prev) { + trace_state = (PWRDM_TRACE_STATES_FLAG | + ((state & OMAP_POWERSTATE_MASK) << 8) | + ((prev & OMAP_POWERSTATE_MASK) << 0)); + trace_power_domain_target(pwrdm->name, trace_state, + smp_processor_id()); + } break; default: return -EINVAL; @@ -181,7 +196,7 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) /** * pwrdm_init - set up the powerdomain layer * @pwrdm_list: array of struct powerdomain pointers to register - * @custom_funcs: func pointers for arch specfic implementations + * @custom_funcs: func pointers for arch specific implementations * * Loop through the array of powerdomains @pwrdm_list, registering all * that are available on the current CPU. If pwrdm_list is supplied @@ -406,8 +421,13 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) pr_debug("powerdomain: setting next powerstate for %s to %0x\n", pwrdm->name, pwrst); - if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) + if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { + /* Trace the pwrdm desired target state */ + trace_power_domain_target(pwrdm->name, pwrst, + smp_processor_id()); + /* Program the pwrdm desired target state */ ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); + } return ret; } @@ -938,3 +958,44 @@ u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm) return count; } + +/** + * pwrdm_can_ever_lose_context - can this powerdomain ever lose context? + * @pwrdm: struct powerdomain * + * + * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain + * can lose either memory or logic context or if @pwrdm is invalid, or + * returns 0 otherwise. This function is not concerned with how the + * powerdomain registers are programmed (i.e., to go off or not); it's + * concerned with whether it's ever possible for this powerdomain to + * go off while some other part of the chip is active. This function + * assumes that every powerdomain can go to either ON or INACTIVE. + */ +bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm) +{ + int i; + + if (IS_ERR_OR_NULL(pwrdm)) { + pr_debug("powerdomain: %s: invalid powerdomain pointer\n", + __func__); + return 1; + } + + if (pwrdm->pwrsts & PWRSTS_OFF) + return 1; + + if (pwrdm->pwrsts & PWRSTS_RET) { + if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF) + return 1; + + for (i = 0; i < pwrdm->banks; i++) + if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF) + return 1; + } + + for (i = 0; i < pwrdm->banks; i++) + if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF) + return 1; + + return 0; +} |