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_get_oscillator(u32 *tstart, u32 *tshut)
 58{
 59	if (!tstart || !tshut)
 60		return;
 61
 62	*tstart = oscillator.startup_time;
 63	*tshut = oscillator.shutdown_time;
 64}
 65#endif
 66
 67int omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused)
 68{
 69	clkdm_allow_idle(clkdm);
 70	return 0;
 71}
 72
 73#ifdef CONFIG_SUSPEND
 74static int omap_pm_enter(suspend_state_t suspend_state)
 75{
 76	int ret = 0;
 77
 78	if (!omap_pm_suspend)
 79		return -ENOENT; /* XXX doublecheck */
 80
 81	switch (suspend_state) {
 82	case PM_SUSPEND_MEM:
 83		ret = omap_pm_suspend();
 84		break;
 85	default:
 86		ret = -EINVAL;
 87	}
 88
 89	return ret;
 90}
 91
 92static int omap_pm_begin(suspend_state_t state)
 93{
 94	cpu_idle_poll_ctrl(true);
 95	if (soc_is_omap34xx())
 96		omap_prcm_irq_prepare();
 97	return 0;
 98}
 99
100static void omap_pm_end(void)
101{
102	cpu_idle_poll_ctrl(false);
103}
104
105static void omap_pm_wake(void)
106{
107	if (soc_is_omap34xx())
108		omap_prcm_irq_complete();
109}
110
111static const struct platform_suspend_ops omap_pm_ops = {
112	.begin		= omap_pm_begin,
113	.end		= omap_pm_end,
114	.enter		= omap_pm_enter,
115	.wake		= omap_pm_wake,
116	.valid		= suspend_valid_only_mem,
117};
118
119/**
120 * omap_common_suspend_init - Set common suspend routines for OMAP SoCs
121 * @pm_suspend: function pointer to SoC specific suspend function
122 */
123void omap_common_suspend_init(void *pm_suspend)
124{
125	omap_pm_suspend = pm_suspend;
126	suspend_set_ops(&omap_pm_ops);
127}
128#endif /* CONFIG_SUSPEND */
129
130int __maybe_unused omap_pm_nop_init(void)
131{
132	return 0;
133}
134
135int (*omap_pm_soc_init)(void);
136
137static int __init omap2_common_pm_late_init(void)
138{
139	int error;
140
141	if (!omap_pm_soc_init)
142		return 0;
143
144	/* Init the voltage layer */
145	omap3_twl_init();
146	omap4_twl_init();
147	omap4_cpcap_init();
148	omap_voltage_late_init();
149
150	/* Smartreflex device init */
151	omap_devinit_smartreflex();
152
153	error = omap_pm_soc_init();
154	if (error)
155		pr_warn("%s: pm soc init failed: %i\n", __func__, error);
156
157	omap2_clk_enable_autoidle_all();
158
159	return 0;
160}
161omap_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);