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/*
* 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/pm_opp.h>
#include <linux/export.h>
#include <linux/suspend.h>
#include <linux/clk.h>
#include <linux/cpu.h>
#include <asm/system_misc.h>
#include "omap_device.h"
#include "common.h"
#include "soc.h"
#include "prcm-common.h"
#include "voltage.h"
#include "powerdomain.h"
#include "clockdomain.h"
#include "pm.h"
#ifdef CONFIG_SUSPEND
/*
* omap_pm_suspend: points to a function that does the SoC-specific
* suspend work
*/
static int (*omap_pm_suspend)(void);
#endif
#ifdef CONFIG_PM
/**
* struct omap2_oscillator - Describe the board main oscillator latencies
* @startup_time: oscillator startup latency
* @shutdown_time: oscillator shutdown latency
*/
struct omap2_oscillator {
u32 startup_time;
u32 shutdown_time;
};
static struct omap2_oscillator oscillator = {
.startup_time = ULONG_MAX,
.shutdown_time = ULONG_MAX,
};
void omap_pm_setup_oscillator(u32 tstart, u32 tshut)
{
oscillator.startup_time = tstart;
oscillator.shutdown_time = tshut;
}
void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
{
if (!tstart || !tshut)
return;
*tstart = oscillator.startup_time;
*tshut = oscillator.shutdown_time;
}
#endif
int omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused)
{
clkdm_allow_idle(clkdm);
return 0;
}
#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_MEM:
ret = omap_pm_suspend();
break;
default:
ret = -EINVAL;
}
return ret;
}
static int omap_pm_begin(suspend_state_t state)
{
cpu_idle_poll_ctrl(true);
if (soc_is_omap34xx())
omap_prcm_irq_prepare();
return 0;
}
static void omap_pm_end(void)
{
cpu_idle_poll_ctrl(false);
}
static void omap_pm_wake(void)
{
if (soc_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,
.wake = omap_pm_wake,
.valid = suspend_valid_only_mem,
};
/**
* omap_common_suspend_init - Set common suspend routines for OMAP SoCs
* @pm_suspend: function pointer to SoC specific suspend function
*/
void omap_common_suspend_init(void *pm_suspend)
{
omap_pm_suspend = pm_suspend;
suspend_set_ops(&omap_pm_ops);
}
#endif /* CONFIG_SUSPEND */
int __maybe_unused omap_pm_nop_init(void)
{
return 0;
}
int (*omap_pm_soc_init)(void);
int __init omap2_common_pm_late_init(void)
{
int error;
if (!omap_pm_soc_init)
return 0;
/* Init the voltage layer */
omap3_twl_init();
omap4_twl_init();
omap_voltage_late_init();
/* Smartreflex device init */
omap_devinit_smartreflex();
error = omap_pm_soc_init();
if (error)
pr_warn("%s: pm soc init failed: %i\n", __func__, error);
omap2_clk_enable_autoidle_all();
return 0;
}
omap_late_initcall(omap2_common_pm_late_init);
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