1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * pm.c - Common OMAP2+ power management-related code
  4 *
  5 * Copyright (C) 2010 Texas Instruments, Inc.
  6 * Copyright (C) 2010 Nokia Corporation
  7 */
  8
  9#include <linux/kernel.h>
 10#include <linux/init.h>
 11#include <linux/io.h>
 12#include <linux/err.h>
 13#include <linux/pm_opp.h>
 14#include <linux/export.h>
 15#include <linux/suspend.h>
 16#include <linux/clk.h>
 17#include <linux/cpu.h>
 18
 19#include <asm/system_misc.h>
 20
 21#include "omap_device.h"
 22#include "common.h"
 23
 24#include "soc.h"
 25#include "prcm-common.h"
 26#include "voltage.h"
 27#include "powerdomain.h"
 28#include "clockdomain.h"
 29#include "pm.h"
 30
 31u32 enable_off_mode;
 32
 33#ifdef CONFIG_SUSPEND
 34/*
 35 * omap_pm_suspend: points to a function that does the SoC-specific
 36 * suspend work
 37 */
 38static int (*omap_pm_suspend)(void);
 39#endif
 40
 41#ifdef CONFIG_PM
 42/**
 43 * struct omap2_oscillator - Describe the board main oscillator latencies
 44 * @startup_time: oscillator startup latency
 45 * @shutdown_time: oscillator shutdown latency
 46 */
 47struct omap2_oscillator {
 48	u32 startup_time;
 49	u32 shutdown_time;
 50};
 51
 52static struct omap2_oscillator oscillator = {
 53	.startup_time = ULONG_MAX,
 54	.shutdown_time = ULONG_MAX,
 55};
 56
 57void omap_pm_setup_oscillator(u32 tstart, u32 tshut)
 58{
 59	oscillator.startup_time = tstart;
 60	oscillator.shutdown_time = tshut;
 61}
 62
 63void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
 64{
 65	if (!tstart || !tshut)
 66		return;
 67
 68	*tstart = oscillator.startup_time;
 69	*tshut = oscillator.shutdown_time;
 70}
 71#endif
 72
 73int omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused)
 74{
 75	clkdm_allow_idle(clkdm);
 76	return 0;
 77}
 78
 79#ifdef CONFIG_SUSPEND
 80static int omap_pm_enter(suspend_state_t suspend_state)
 81{
 82	int ret = 0;
 83
 84	if (!omap_pm_suspend)
 85		return -ENOENT; /* XXX doublecheck */
 86
 87	switch (suspend_state) {
 88	case PM_SUSPEND_MEM:
 89		ret = omap_pm_suspend();
 90		break;
 91	default:
 92		ret = -EINVAL;
 93	}
 94
 95	return ret;
 96}
 97
 98static int omap_pm_begin(suspend_state_t state)
 99{
100	cpu_idle_poll_ctrl(true);
101	if (soc_is_omap34xx())
102		omap_prcm_irq_prepare();
103	return 0;
104}
105
106static void omap_pm_end(void)
107{
108	cpu_idle_poll_ctrl(false);
109}
110
111static void omap_pm_wake(void)
112{
113	if (soc_is_omap34xx())
114		omap_prcm_irq_complete();
115}
116
117static const struct platform_suspend_ops omap_pm_ops = {
118	.begin		= omap_pm_begin,
119	.end		= omap_pm_end,
120	.enter		= omap_pm_enter,
121	.wake		= omap_pm_wake,
122	.valid		= suspend_valid_only_mem,
123};
124
125/**
126 * omap_common_suspend_init - Set common suspend routines for OMAP SoCs
127 * @pm_suspend: function pointer to SoC specific suspend function
128 */
129void omap_common_suspend_init(void *pm_suspend)
130{
131	omap_pm_suspend = pm_suspend;
132	suspend_set_ops(&omap_pm_ops);
133}
134#endif /* CONFIG_SUSPEND */
135
136int __maybe_unused omap_pm_nop_init(void)
137{
138	return 0;
139}
140
141int (*omap_pm_soc_init)(void);
142
143int __init omap2_common_pm_late_init(void)
144{
145	int error;
146
147	if (!omap_pm_soc_init)
148		return 0;
149
150	/* Init the voltage layer */
151	omap3_twl_init();
152	omap4_twl_init();
153	omap4_cpcap_init();
154	omap_voltage_late_init();
155
156	/* Smartreflex device init */
157	omap_devinit_smartreflex();
158
159	error = omap_pm_soc_init();
160	if (error)
161		pr_warn("%s: pm soc init failed: %i\n", __func__, error);
162
163	omap2_clk_enable_autoidle_all();
164
165	return 0;
166}
167omap_late_initcall(omap2_common_pm_late_init);

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * pm.c - Common OMAP2+ power management-related code
  4 *
  5 * Copyright (C) 2010 Texas Instruments, Inc.
  6 * Copyright (C) 2010 Nokia Corporation
  7 */
  8
  9#include <linux/kernel.h>
 10#include <linux/init.h>
 11#include <linux/io.h>
 12#include <linux/err.h>
 13#include <linux/pm_opp.h>
 14#include <linux/export.h>
 15#include <linux/suspend.h>
 16#include <linux/clk.h>
 17#include <linux/cpu.h>
 18
 19#include <asm/system_misc.h>
 20
 21#include "omap_device.h"
 22#include "common.h"
 23
 24#include "soc.h"
 25#include "prcm-common.h"
 26#include "voltage.h"
 27#include "powerdomain.h"
 28#include "clockdomain.h"
 29#include "pm.h"
 30
 
 
 31#ifdef CONFIG_SUSPEND
 32/*
 33 * omap_pm_suspend: points to a function that does the SoC-specific
 34 * suspend work
 35 */
 36static int (*omap_pm_suspend)(void);
 37#endif
 38
 39#ifdef CONFIG_PM
 40/**
 41 * struct omap2_oscillator - Describe the board main oscillator latencies
 42 * @startup_time: oscillator startup latency
 43 * @shutdown_time: oscillator shutdown latency
 44 */
 45struct omap2_oscillator {
 46	u32 startup_time;
 47	u32 shutdown_time;
 48};
 49
 50static struct omap2_oscillator oscillator = {
 51	.startup_time = ULONG_MAX,
 52	.shutdown_time = ULONG_MAX,
 53};
 54
 55void omap_pm_setup_oscillator(u32 tstart, u32 tshut)
 56{
 57	oscillator.startup_time = tstart;
 58	oscillator.shutdown_time = tshut;
 59}
 60
 61void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
 62{
 63	if (!tstart || !tshut)
 64		return;
 65
 66	*tstart = oscillator.startup_time;
 67	*tshut = oscillator.shutdown_time;
 68}
 69#endif
 70
 71int omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused)
 72{
 73	clkdm_allow_idle(clkdm);
 74	return 0;
 75}
 76
 77#ifdef CONFIG_SUSPEND
 78static int omap_pm_enter(suspend_state_t suspend_state)
 79{
 80	int ret = 0;
 81
 82	if (!omap_pm_suspend)
 83		return -ENOENT; /* XXX doublecheck */
 84
 85	switch (suspend_state) {
 86	case PM_SUSPEND_MEM:
 87		ret = omap_pm_suspend();
 88		break;
 89	default:
 90		ret = -EINVAL;
 91	}
 92
 93	return ret;
 94}
 95
 96static int omap_pm_begin(suspend_state_t state)
 97{
 98	cpu_idle_poll_ctrl(true);
 99	if (soc_is_omap34xx())
100		omap_prcm_irq_prepare();
101	return 0;
102}
103
104static void omap_pm_end(void)
105{
106	cpu_idle_poll_ctrl(false);
107}
108
109static void omap_pm_wake(void)
110{
111	if (soc_is_omap34xx())
112		omap_prcm_irq_complete();
113}
114
115static const struct platform_suspend_ops omap_pm_ops = {
116	.begin		= omap_pm_begin,
117	.end		= omap_pm_end,
118	.enter		= omap_pm_enter,
119	.wake		= omap_pm_wake,
120	.valid		= suspend_valid_only_mem,
121};
122
123/**
124 * omap_common_suspend_init - Set common suspend routines for OMAP SoCs
125 * @pm_suspend: function pointer to SoC specific suspend function
126 */
127void omap_common_suspend_init(void *pm_suspend)
128{
129	omap_pm_suspend = pm_suspend;
130	suspend_set_ops(&omap_pm_ops);
131}
132#endif /* CONFIG_SUSPEND */
133
134int __maybe_unused omap_pm_nop_init(void)
135{
136	return 0;
137}
138
139int (*omap_pm_soc_init)(void);
140
141int __init omap2_common_pm_late_init(void)
142{
143	int error;
144
145	if (!omap_pm_soc_init)
146		return 0;
147
148	/* Init the voltage layer */
149	omap3_twl_init();
150	omap4_twl_init();
 
151	omap_voltage_late_init();
152
153	/* Smartreflex device init */
154	omap_devinit_smartreflex();
155
156	error = omap_pm_soc_init();
157	if (error)
158		pr_warn("%s: pm soc init failed: %i\n", __func__, error);
159
160	omap2_clk_enable_autoidle_all();
161
162	return 0;
163}
164omap_late_initcall(omap2_common_pm_late_init);