2 * pm.c - Common OMAP2+ power management-related code
4 * Copyright (C) 2010 Texas Instruments, Inc.
5 * Copyright (C) 2010 Nokia Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
15 #include <linux/err.h>
17 #include <plat/omap-pm.h>
18 #include <plat/omap_device.h>
19 #include <plat/common.h>
21 #include <plat/powerdomain.h>
22 #include <plat/clockdomain.h>
24 static struct omap_device_pm_latency
*pm_lats
;
26 static struct device
*mpu_dev
;
27 static struct device
*iva_dev
;
28 static struct device
*l3_dev
;
29 static struct device
*dsp_dev
;
31 struct device
*omap2_get_mpuss_device(void)
33 WARN_ON_ONCE(!mpu_dev
);
37 struct device
*omap2_get_iva_device(void)
39 WARN_ON_ONCE(!iva_dev
);
43 struct device
*omap2_get_l3_device(void)
45 WARN_ON_ONCE(!l3_dev
);
49 struct device
*omap4_get_dsp_device(void)
51 WARN_ON_ONCE(!dsp_dev
);
54 EXPORT_SYMBOL(omap4_get_dsp_device
);
56 /* static int _init_omap_device(struct omap_hwmod *oh, void *user) */
57 static int _init_omap_device(char *name
, struct device
**new_dev
)
59 struct omap_hwmod
*oh
;
60 struct omap_device
*od
;
62 oh
= omap_hwmod_lookup(name
);
63 if (WARN(!oh
, "%s: could not find omap_hwmod for %s\n",
67 od
= omap_device_build(oh
->name
, 0, oh
, NULL
, 0, pm_lats
, 0, false);
68 if (WARN(IS_ERR(od
), "%s: could not build omap_device for %s\n",
72 *new_dev
= &od
->pdev
.dev
;
78 * Build omap_devices for processors and bus.
80 static void omap2_init_processor_devices(void)
82 _init_omap_device("mpu", &mpu_dev
);
83 _init_omap_device("iva", &iva_dev
);
84 if (cpu_is_omap44xx()) {
85 _init_omap_device("l3_main_1", &l3_dev
);
86 _init_omap_device("dsp", &dsp_dev
);
88 _init_omap_device("l3_main", &l3_dev
);
93 * This sets pwrdm state (other than mpu & core. Currently only ON &
94 * RET are supported. Function is assuming that clkdm doesn't have
95 * hw_sup mode enabled.
97 int omap_set_pwrdm_state(struct powerdomain
*pwrdm
, u32 state
)
100 int sleep_switch
= 0;
103 if (pwrdm
== NULL
|| IS_ERR(pwrdm
))
106 while (!(pwrdm
->pwrsts
& (1 << state
))) {
107 if (state
== PWRDM_POWER_OFF
)
112 cur_state
= pwrdm_read_next_pwrst(pwrdm
);
113 if (cur_state
== state
)
116 if (pwrdm_read_pwrst(pwrdm
) < PWRDM_POWER_ON
) {
117 omap2_clkdm_wakeup(pwrdm
->pwrdm_clkdms
[0]);
119 pwrdm_wait_transition(pwrdm
);
122 ret
= pwrdm_set_next_pwrst(pwrdm
, state
);
124 printk(KERN_ERR
"Unable to set state of powerdomain: %s\n",
130 omap2_clkdm_allow_idle(pwrdm
->pwrdm_clkdms
[0]);
131 pwrdm_wait_transition(pwrdm
);
132 pwrdm_state_switch(pwrdm
);
139 static int __init
omap2_common_pm_init(void)
141 omap2_init_processor_devices();
146 postcore_initcall(omap2_common_pm_init
);