diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/pm.c')
-rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-omap2/pm.c | 325 |
1 files changed, 0 insertions, 325 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/pm.c b/ANDROID_3.4.5/arch/arm/mach-omap2/pm.c deleted file mode 100644 index d0c1c969..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-omap2/pm.c +++ /dev/null @@ -1,325 +0,0 @@ -/* - * pm.c - Common OMAP2+ power management-related code - * - * Copyright (C) 2010 Texas Instruments, Inc. - * Copyright (C) 2010 Nokia Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/err.h> -#include <linux/opp.h> -#include <linux/export.h> -#include <linux/suspend.h> - -#include <asm/system_misc.h> - -#include <plat/omap-pm.h> -#include <plat/omap_device.h> -#include "common.h" - -#include "prcm-common.h" -#include "voltage.h" -#include "powerdomain.h" -#include "clockdomain.h" -#include "pm.h" -#include "twl-common.h" - -static struct omap_device_pm_latency *pm_lats; - -/* - * omap_pm_suspend: points to a function that does the SoC-specific - * suspend work - */ -int (*omap_pm_suspend)(void); - -static int __init _init_omap_device(char *name) -{ - struct omap_hwmod *oh; - struct platform_device *pdev; - - oh = omap_hwmod_lookup(name); - if (WARN(!oh, "%s: could not find omap_hwmod for %s\n", - __func__, name)) - return -ENODEV; - - pdev = omap_device_build(oh->name, 0, oh, NULL, 0, pm_lats, 0, false); - if (WARN(IS_ERR(pdev), "%s: could not build omap_device for %s\n", - __func__, name)) - return -ENODEV; - - return 0; -} - -/* - * Build omap_devices for processors and bus. - */ -static void __init omap2_init_processor_devices(void) -{ - _init_omap_device("mpu"); - if (omap3_has_iva()) - _init_omap_device("iva"); - - if (cpu_is_omap44xx()) { - _init_omap_device("l3_main_1"); - _init_omap_device("dsp"); - _init_omap_device("iva"); - } else { - _init_omap_device("l3_main"); - } -} - -/* Types of sleep_switch used in omap_set_pwrdm_state */ -#define FORCEWAKEUP_SWITCH 0 -#define LOWPOWERSTATE_SWITCH 1 - -int __init omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused) -{ - if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO) - clkdm_allow_idle(clkdm); - else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP && - atomic_read(&clkdm->usecount) == 0) - clkdm_sleep(clkdm); - return 0; -} - -/* - * This sets pwrdm state (other than mpu & core. Currently only ON & - * RET are supported. - */ -int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 pwrst) -{ - u8 curr_pwrst, next_pwrst; - int sleep_switch = -1, ret = 0, hwsup = 0; - - if (!pwrdm || IS_ERR(pwrdm)) - return -EINVAL; - - while (!(pwrdm->pwrsts & (1 << pwrst))) { - if (pwrst == PWRDM_POWER_OFF) - return ret; - pwrst--; - } - - next_pwrst = pwrdm_read_next_pwrst(pwrdm); - if (next_pwrst == pwrst) - return ret; - - curr_pwrst = pwrdm_read_pwrst(pwrdm); - if (curr_pwrst < PWRDM_POWER_ON) { - if ((curr_pwrst > pwrst) && - (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) { - sleep_switch = LOWPOWERSTATE_SWITCH; - } else { - hwsup = clkdm_in_hwsup(pwrdm->pwrdm_clkdms[0]); - clkdm_wakeup(pwrdm->pwrdm_clkdms[0]); - sleep_switch = FORCEWAKEUP_SWITCH; - } - } - - ret = pwrdm_set_next_pwrst(pwrdm, pwrst); - if (ret) - pr_err("%s: unable to set power state of powerdomain: %s\n", - __func__, pwrdm->name); - - switch (sleep_switch) { - case FORCEWAKEUP_SWITCH: - if (hwsup) - clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]); - else - clkdm_sleep(pwrdm->pwrdm_clkdms[0]); - break; - case LOWPOWERSTATE_SWITCH: - pwrdm_set_lowpwrstchange(pwrdm); - pwrdm_wait_transition(pwrdm); - pwrdm_state_switch(pwrdm); - break; - } - - return ret; -} - - - -/* - * This API is to be called during init to set the various voltage - * domains to the voltage as per the opp table. Typically we boot up - * at the nominal voltage. So this function finds out the rate of - * the clock associated with the voltage domain, finds out the correct - * opp entry and sets the voltage domain to the voltage specified - * in the opp entry - */ -static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name, - const char *oh_name) -{ - struct voltagedomain *voltdm; - struct clk *clk; - struct opp *opp; - unsigned long freq, bootup_volt; - struct device *dev; - - if (!vdd_name || !clk_name || !oh_name) { - pr_err("%s: invalid parameters\n", __func__); - goto exit; - } - - dev = omap_device_get_by_hwmod_name(oh_name); - if (IS_ERR(dev)) { - pr_err("%s: Unable to get dev pointer for hwmod %s\n", - __func__, oh_name); - goto exit; - } - - voltdm = voltdm_lookup(vdd_name); - if (IS_ERR(voltdm)) { - pr_err("%s: unable to get vdd pointer for vdd_%s\n", - __func__, vdd_name); - goto exit; - } - - clk = clk_get(NULL, clk_name); - if (IS_ERR(clk)) { - pr_err("%s: unable to get clk %s\n", __func__, clk_name); - goto exit; - } - - freq = clk->rate; - clk_put(clk); - - rcu_read_lock(); - opp = opp_find_freq_ceil(dev, &freq); - if (IS_ERR(opp)) { - rcu_read_unlock(); - pr_err("%s: unable to find boot up OPP for vdd_%s\n", - __func__, vdd_name); - goto exit; - } - - bootup_volt = opp_get_voltage(opp); - rcu_read_unlock(); - if (!bootup_volt) { - pr_err("%s: unable to find voltage corresponding " - "to the bootup OPP for vdd_%s\n", __func__, vdd_name); - goto exit; - } - - voltdm_scale(voltdm, bootup_volt); - return 0; - -exit: - pr_err("%s: unable to set vdd_%s\n", __func__, vdd_name); - return -EINVAL; -} - -#ifdef CONFIG_SUSPEND -static int omap_pm_enter(suspend_state_t suspend_state) -{ - int ret = 0; - - if (!omap_pm_suspend) - return -ENOENT; /* XXX doublecheck */ - - switch (suspend_state) { - case PM_SUSPEND_STANDBY: - case PM_SUSPEND_MEM: - ret = omap_pm_suspend(); - break; - default: - ret = -EINVAL; - } - - return ret; -} - -static int omap_pm_begin(suspend_state_t state) -{ - disable_hlt(); - if (cpu_is_omap34xx()) - omap_prcm_irq_prepare(); - return 0; -} - -static void omap_pm_end(void) -{ - enable_hlt(); - return; -} - -static void omap_pm_finish(void) -{ - if (cpu_is_omap34xx()) - omap_prcm_irq_complete(); -} - -static const struct platform_suspend_ops omap_pm_ops = { - .begin = omap_pm_begin, - .end = omap_pm_end, - .enter = omap_pm_enter, - .finish = omap_pm_finish, - .valid = suspend_valid_only_mem, -}; - -#endif /* CONFIG_SUSPEND */ - -static void __init omap3_init_voltages(void) -{ - if (!cpu_is_omap34xx()) - return; - - omap2_set_init_voltage("mpu_iva", "dpll1_ck", "mpu"); - omap2_set_init_voltage("core", "l3_ick", "l3_main"); -} - -static void __init omap4_init_voltages(void) -{ - if (!cpu_is_omap44xx()) - return; - - omap2_set_init_voltage("mpu", "dpll_mpu_ck", "mpu"); - omap2_set_init_voltage("core", "l3_div_ck", "l3_main_1"); - omap2_set_init_voltage("iva", "dpll_iva_m5x2_ck", "iva"); -} - -static int __init omap2_common_pm_init(void) -{ - if (!of_have_populated_dt()) - omap2_init_processor_devices(); - omap_pm_if_init(); - - return 0; -} -postcore_initcall(omap2_common_pm_init); - -static int __init omap2_common_pm_late_init(void) -{ - /* - * In the case of DT, the PMIC and SR initialization will be done using - * a completely different mechanism. - * Disable this part if a DT blob is available. - */ - if (of_have_populated_dt()) - return 0; - - /* Init the voltage layer */ - omap_pmic_late_init(); - omap_voltage_late_init(); - - /* Initialize the voltages */ - omap3_init_voltages(); - omap4_init_voltages(); - - /* Smartreflex device init */ - omap_devinit_smartreflex(); - -#ifdef CONFIG_SUSPEND - suspend_set_ops(&omap_pm_ops); -#endif - - return 0; -} -late_initcall(omap2_common_pm_late_init); |