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12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/io.h>
15#include <linux/err.h>
16#include <linux/pm_opp.h>
17#include <linux/export.h>
18#include <linux/suspend.h>
19#include <linux/cpu.h>
20
21#include <asm/system_misc.h>
22
23#include "omap-pm.h"
24#include "omap_device.h"
25#include "common.h"
26
27#include "soc.h"
28#include "prcm-common.h"
29#include "voltage.h"
30#include "powerdomain.h"
31#include "clockdomain.h"
32#include "pm.h"
33
34#ifdef CONFIG_SUSPEND
35
36
37
38
39static int (*omap_pm_suspend)(void);
40#endif
41
42#ifdef CONFIG_PM
43
44
45
46
47
48struct omap2_oscillator {
49 u32 startup_time;
50 u32 shutdown_time;
51};
52
53static struct omap2_oscillator oscillator = {
54 .startup_time = ULONG_MAX,
55 .shutdown_time = ULONG_MAX,
56};
57
58void omap_pm_setup_oscillator(u32 tstart, u32 tshut)
59{
60 oscillator.startup_time = tstart;
61 oscillator.shutdown_time = tshut;
62}
63
64void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
65{
66 if (!tstart || !tshut)
67 return;
68
69 *tstart = oscillator.startup_time;
70 *tshut = oscillator.shutdown_time;
71}
72#endif
73
74int __init omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused)
75{
76 clkdm_allow_idle(clkdm);
77 return 0;
78}
79
80
81
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83
84
85
86
87
88static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name,
89 const char *oh_name)
90{
91 struct voltagedomain *voltdm;
92 struct clk *clk;
93 struct dev_pm_opp *opp;
94 unsigned long freq, bootup_volt;
95 struct device *dev;
96
97 if (!vdd_name || !clk_name || !oh_name) {
98 pr_err("%s: invalid parameters\n", __func__);
99 goto exit;
100 }
101
102 if (!strncmp(oh_name, "mpu", 3))
103
104
105
106
107 dev = get_cpu_device(0);
108 else
109 dev = omap_device_get_by_hwmod_name(oh_name);
110
111 if (IS_ERR(dev)) {
112 pr_err("%s: Unable to get dev pointer for hwmod %s\n",
113 __func__, oh_name);
114 goto exit;
115 }
116
117 voltdm = voltdm_lookup(vdd_name);
118 if (!voltdm) {
119 pr_err("%s: unable to get vdd pointer for vdd_%s\n",
120 __func__, vdd_name);
121 goto exit;
122 }
123
124 clk = clk_get(NULL, clk_name);
125 if (IS_ERR(clk)) {
126 pr_err("%s: unable to get clk %s\n", __func__, clk_name);
127 goto exit;
128 }
129
130 freq = clk_get_rate(clk);
131 clk_put(clk);
132
133 opp = dev_pm_opp_find_freq_ceil(dev, &freq);
134 if (IS_ERR(opp)) {
135 pr_err("%s: unable to find boot up OPP for vdd_%s\n",
136 __func__, vdd_name);
137 goto exit;
138 }
139
140 bootup_volt = dev_pm_opp_get_voltage(opp);
141 dev_pm_opp_put(opp);
142
143 if (!bootup_volt) {
144 pr_err("%s: unable to find voltage corresponding to the bootup OPP for vdd_%s\n",
145 __func__, vdd_name);
146 goto exit;
147 }
148
149 voltdm_scale(voltdm, bootup_volt);
150 return 0;
151
152exit:
153 pr_err("%s: unable to set vdd_%s\n", __func__, vdd_name);
154 return -EINVAL;
155}
156
157#ifdef CONFIG_SUSPEND
158static int omap_pm_enter(suspend_state_t suspend_state)
159{
160 int ret = 0;
161
162 if (!omap_pm_suspend)
163 return -ENOENT;
164
165 switch (suspend_state) {
166 case PM_SUSPEND_MEM:
167 ret = omap_pm_suspend();
168 break;
169 default:
170 ret = -EINVAL;
171 }
172
173 return ret;
174}
175
176static int omap_pm_begin(suspend_state_t state)
177{
178 cpu_idle_poll_ctrl(true);
179 if (soc_is_omap34xx())
180 omap_prcm_irq_prepare();
181 return 0;
182}
183
184static void omap_pm_end(void)
185{
186 cpu_idle_poll_ctrl(false);
187}
188
189static void omap_pm_finish(void)
190{
191 if (soc_is_omap34xx())
192 omap_prcm_irq_complete();
193}
194
195static const struct platform_suspend_ops omap_pm_ops = {
196 .begin = omap_pm_begin,
197 .end = omap_pm_end,
198 .enter = omap_pm_enter,
199 .finish = omap_pm_finish,
200 .valid = suspend_valid_only_mem,
201};
202
203
204
205
206
207void omap_common_suspend_init(void *pm_suspend)
208{
209 omap_pm_suspend = pm_suspend;
210 suspend_set_ops(&omap_pm_ops);
211}
212#endif
213
214static void __init omap3_init_voltages(void)
215{
216 if (!soc_is_omap34xx())
217 return;
218
219 omap2_set_init_voltage("mpu_iva", "dpll1_ck", "mpu");
220 omap2_set_init_voltage("core", "l3_ick", "l3_main");
221}
222
223static void __init omap4_init_voltages(void)
224{
225 if (!soc_is_omap44xx())
226 return;
227
228 omap2_set_init_voltage("mpu", "dpll_mpu_ck", "mpu");
229 omap2_set_init_voltage("core", "l3_div_ck", "l3_main_1");
230 omap2_set_init_voltage("iva", "dpll_iva_m5x2_ck", "iva");
231}
232
233static int __init omap2_common_pm_init(void)
234{
235 omap_pm_if_init();
236
237 return 0;
238}
239omap_postcore_initcall(omap2_common_pm_init);
240
241int __init omap2_common_pm_late_init(void)
242{
243
244 omap3_twl_init();
245 omap4_twl_init();
246 omap_voltage_late_init();
247
248
249 omap3_init_voltages();
250 omap4_init_voltages();
251
252
253 omap_devinit_smartreflex();
254
255 return 0;
256}
257