blob: 3f2d396723930ce1a27985bc3dcf48d122576e9b [file] [log] [blame]
Kevin Hilmane933ec72010-06-17 15:48:43 -07001/*
2 * Runtime PM support code for OMAP1
3 *
4 * Author: Kevin Hilman, Deep Root Systems, LLC
5 *
6 * Copyright (C) 2010 Texas Instruments, Inc.
7 *
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/io.h>
15#include <linux/pm_runtime.h>
Rafael J. Wysockib5e8d262011-08-25 15:34:19 +020016#include <linux/pm_clock.h>
Kevin Hilmane933ec72010-06-17 15:48:43 -070017#include <linux/platform_device.h>
18#include <linux/mutex.h>
19#include <linux/clk.h>
20#include <linux/err.h>
21
Paul Walmsley47ba70992012-10-25 19:01:11 -060022#include "soc.h"
23
Kevin Hilmane933ec72010-06-17 15:48:43 -070024#ifdef CONFIG_PM_RUNTIME
25static int omap1_pm_runtime_suspend(struct device *dev)
26{
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020027 int ret;
Kevin Hilmane933ec72010-06-17 15:48:43 -070028
29 dev_dbg(dev, "%s\n", __func__);
30
31 ret = pm_generic_runtime_suspend(dev);
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020032 if (ret)
33 return ret;
Kevin Hilmane933ec72010-06-17 15:48:43 -070034
Rafael J. Wysocki3d5c3032011-07-01 22:13:44 +020035 ret = pm_clk_suspend(dev);
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020036 if (ret) {
37 pm_generic_runtime_resume(dev);
38 return ret;
Kevin Hilmane933ec72010-06-17 15:48:43 -070039 }
40
41 return 0;
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020042}
Kevin Hilmane933ec72010-06-17 15:48:43 -070043
44static int omap1_pm_runtime_resume(struct device *dev)
45{
Kevin Hilmane933ec72010-06-17 15:48:43 -070046 dev_dbg(dev, "%s\n", __func__);
47
Rafael J. Wysocki3d5c3032011-07-01 22:13:44 +020048 pm_clk_resume(dev);
Kevin Hilmane933ec72010-06-17 15:48:43 -070049 return pm_generic_runtime_resume(dev);
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020050}
51
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020052static struct dev_pm_domain default_pm_domain = {
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020053 .ops = {
54 .runtime_suspend = omap1_pm_runtime_suspend,
55 .runtime_resume = omap1_pm_runtime_resume,
56 USE_PLATFORM_PM_SLEEP_OPS
57 },
58};
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020059#define OMAP1_PM_DOMAIN (&default_pm_domain)
Kevin Hilmane9e35c52011-06-14 05:53:18 -070060#else
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020061#define OMAP1_PM_DOMAIN NULL
Kevin Hilmane9e35c52011-06-14 05:53:18 -070062#endif /* CONFIG_PM_RUNTIME */
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020063
64static struct pm_clk_notifier_block platform_bus_notifier = {
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020065 .pm_domain = OMAP1_PM_DOMAIN,
Rafael J. Wysocki600b7762011-05-16 20:15:36 +020066 .con_ids = { "ick", "fck", NULL, },
Kevin Hilmane933ec72010-06-17 15:48:43 -070067};
68
69static int __init omap1_pm_runtime_init(void)
70{
Tony Lindgren7f9187c2010-12-10 09:46:24 -080071 if (!cpu_class_is_omap1())
72 return -ENODEV;
73
Rafael J. Wysocki3d5c3032011-07-01 22:13:44 +020074 pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
Kevin Hilmane933ec72010-06-17 15:48:43 -070075
76 return 0;
77}
78core_initcall(omap1_pm_runtime_init);
Kevin Hilmane9e35c52011-06-14 05:53:18 -070079