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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
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);