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fb2c599f05
Enabling off mode was only reachable deeply hidden in the debugfs. As powersaving is an important feature, move the option out of its shady place. The debugfs file can still be used to override the default. Use the presence of a device compatible to ti,twl4030-idle or ti,twl4030-idle-osc-off as an indicator that the board is wired correctly for off mode. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> [tony@atomide.com: updated to fix a checkpatch warning] Signed-off-by: Tony Lindgren <tony@atomide.com>
167 lines
3.1 KiB
C
167 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* pm.c - Common OMAP2+ power management-related code
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*
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* Copyright (C) 2010 Texas Instruments, Inc.
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* Copyright (C) 2010 Nokia Corporation
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/err.h>
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#include <linux/pm_opp.h>
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#include <linux/export.h>
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#include <linux/suspend.h>
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#include <linux/clk.h>
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#include <linux/cpu.h>
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#include <asm/system_misc.h>
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#include "omap_device.h"
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#include "common.h"
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#include "soc.h"
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#include "prcm-common.h"
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#include "voltage.h"
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#include "powerdomain.h"
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#include "clockdomain.h"
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#include "pm.h"
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u32 enable_off_mode;
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#ifdef CONFIG_SUSPEND
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/*
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* omap_pm_suspend: points to a function that does the SoC-specific
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* suspend work
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*/
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static int (*omap_pm_suspend)(void);
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#endif
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#ifdef CONFIG_PM
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/**
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* struct omap2_oscillator - Describe the board main oscillator latencies
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* @startup_time: oscillator startup latency
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* @shutdown_time: oscillator shutdown latency
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*/
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struct omap2_oscillator {
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u32 startup_time;
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u32 shutdown_time;
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};
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static struct omap2_oscillator oscillator = {
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.startup_time = ULONG_MAX,
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.shutdown_time = ULONG_MAX,
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};
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void omap_pm_setup_oscillator(u32 tstart, u32 tshut)
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{
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oscillator.startup_time = tstart;
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oscillator.shutdown_time = tshut;
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}
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void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
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{
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if (!tstart || !tshut)
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return;
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*tstart = oscillator.startup_time;
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*tshut = oscillator.shutdown_time;
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}
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#endif
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int omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused)
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{
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clkdm_allow_idle(clkdm);
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return 0;
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}
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#ifdef CONFIG_SUSPEND
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static int omap_pm_enter(suspend_state_t suspend_state)
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{
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int ret = 0;
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if (!omap_pm_suspend)
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return -ENOENT; /* XXX doublecheck */
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switch (suspend_state) {
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case PM_SUSPEND_MEM:
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ret = omap_pm_suspend();
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static int omap_pm_begin(suspend_state_t state)
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{
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cpu_idle_poll_ctrl(true);
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if (soc_is_omap34xx())
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omap_prcm_irq_prepare();
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return 0;
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}
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static void omap_pm_end(void)
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{
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cpu_idle_poll_ctrl(false);
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}
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static void omap_pm_wake(void)
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{
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if (soc_is_omap34xx())
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omap_prcm_irq_complete();
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}
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static const struct platform_suspend_ops omap_pm_ops = {
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.begin = omap_pm_begin,
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.end = omap_pm_end,
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.enter = omap_pm_enter,
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.wake = omap_pm_wake,
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.valid = suspend_valid_only_mem,
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};
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/**
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* omap_common_suspend_init - Set common suspend routines for OMAP SoCs
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* @pm_suspend: function pointer to SoC specific suspend function
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*/
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void omap_common_suspend_init(void *pm_suspend)
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{
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omap_pm_suspend = pm_suspend;
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suspend_set_ops(&omap_pm_ops);
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}
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#endif /* CONFIG_SUSPEND */
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int __maybe_unused omap_pm_nop_init(void)
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{
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return 0;
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}
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int (*omap_pm_soc_init)(void);
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int __init omap2_common_pm_late_init(void)
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{
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int error;
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if (!omap_pm_soc_init)
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return 0;
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/* Init the voltage layer */
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omap3_twl_init();
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omap4_twl_init();
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omap4_cpcap_init();
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omap_voltage_late_init();
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/* Smartreflex device init */
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omap_devinit_smartreflex();
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error = omap_pm_soc_init();
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if (error)
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pr_warn("%s: pm soc init failed: %i\n", __func__, error);
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omap2_clk_enable_autoidle_all();
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return 0;
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}
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omap_late_initcall(omap2_common_pm_late_init);
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