2 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
4 * The code contained herein is licensed under the GNU General Public
5 * License. You may obtain a copy of the GNU General Public License
6 * Version 2 or later at the following locations:
8 * http://www.opensource.org/licenses/gpl-license.html
9 * http://www.gnu.org/copyleft/gpl.html
11 #include <linux/suspend.h>
12 #include <linux/clk.h>
14 #include <linux/err.h>
15 #include <asm/cacheflush.h>
16 #include <asm/tlbflush.h>
17 #include <mach/common.h>
18 #include <mach/hardware.h>
21 static struct clk *gpc_dvfs_clk;
23 static int mx5_suspend_prepare(void)
25 return clk_enable(gpc_dvfs_clk);
28 static int mx5_suspend_enter(suspend_state_t state)
32 mx5_cpu_lp_set(STOP_POWER_OFF);
34 case PM_SUSPEND_STANDBY:
35 mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF);
41 if (state == PM_SUSPEND_MEM) {
42 local_flush_tlb_all();
45 /*clear the EMPGC0/1 bits */
46 __raw_writel(0, MXC_SRPG_EMPGC0_SRPGCR);
47 __raw_writel(0, MXC_SRPG_EMPGC1_SRPGCR);
53 static void mx5_suspend_finish(void)
55 clk_disable(gpc_dvfs_clk);
58 static int mx5_pm_valid(suspend_state_t state)
60 return (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX);
63 static const struct platform_suspend_ops mx5_suspend_ops = {
64 .valid = mx5_pm_valid,
65 .prepare = mx5_suspend_prepare,
66 .enter = mx5_suspend_enter,
67 .finish = mx5_suspend_finish,
70 static int __init mx5_pm_init(void)
72 if (gpc_dvfs_clk == NULL)
73 gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs");
75 if (!IS_ERR(gpc_dvfs_clk)) {
77 suspend_set_ops(&mx5_suspend_ops);
83 device_initcall(mx5_pm_init);