diff options
Diffstat (limited to 'arch/arm/mach-mx51/pm.c')
| -rw-r--r-- | arch/arm/mach-mx51/pm.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/arch/arm/mach-mx51/pm.c b/arch/arm/mach-mx51/pm.c deleted file mode 100644 index 86fc29a708a7..000000000000 --- a/arch/arm/mach-mx51/pm.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * Copyright (C) 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. - */ - -/* - * The code contained herein is licensed under the GNU General Public - * License. You may obtain a copy of the GNU General Public License - * Version 2 or later at the following locations: - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/clk.h> -#include <linux/platform_device.h> -#include <linux/regulator/consumer.h> -#include <linux/suspend.h> -#include <linux/proc_fs.h> -#include <linux/cpufreq.h> -#include <linux/iram_alloc.h> -#include <asm/cacheflush.h> -#include <asm/tlb.h> -#include <asm/mach/map.h> -#include <mach/hardware.h> -#include "crm_regs.h" - -static struct cpu_wp *cpu_wp_tbl; -static struct clk *cpu_clk; - -#if defined(CONFIG_CPU_FREQ_IMX) -static int org_freq; -extern int cpufreq_suspended; -extern int set_cpu_freq(int wp); -#endif - - -static struct device *pm_dev; -struct clk *gpc_dvfs_clk; -extern void cpu_do_suspend_workaround(u32 sdclk_iomux_addr); -extern void cpu_cortexa8_do_idle(void *); -extern struct cpu_wp *(*get_cpu_wp)(int *wp); - -extern int iram_ready; -void *suspend_iram_base; -void (*suspend_in_iram)(void *sdclk_iomux_addr) = NULL; - -static int mx51_suspend_enter(suspend_state_t state) -{ - void __iomem *sdclk_iomux_addr = IO_ADDRESS(IOMUXC_BASE_ADDR + 0x4b8); - - if (gpc_dvfs_clk == NULL) - gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs_clk"); - /* gpc clock is needed for SRPG */ - clk_enable(gpc_dvfs_clk); - switch (state) { - case PM_SUSPEND_MEM: - mxc_cpu_lp_set(STOP_POWER_OFF); - break; - case PM_SUSPEND_STANDBY: - mxc_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF); - break; - default: - return -EINVAL; - } - - if (tzic_enable_wake(0) != 0) - return -EAGAIN; - - if (state == PM_SUSPEND_MEM) { - local_flush_tlb_all(); - flush_cache_all(); - - /* Run the suspend code from iRAM. */ - suspend_in_iram(sdclk_iomux_addr); - - /*clear the EMPGC0/1 bits */ - __raw_writel(0, MXC_SRPG_EMPGC0_SRPGCR); - __raw_writel(0, MXC_SRPG_EMPGC1_SRPGCR); - } else { - cpu_do_idle(); - } - clk_disable(gpc_dvfs_clk); - - return 0; -} - -/* - * Called after processes are frozen, but before we shut down devices. - */ -static int mx51_suspend_prepare(void) -{ -#if defined(CONFIG_CPU_FREQ_IMX) - struct cpufreq_freqs freqs; - org_freq = clk_get_rate(cpu_clk); - freqs.old = org_freq / 1000; - freqs.new = cpu_wp_tbl[0].cpu_rate / 1000; - freqs.cpu = 0; - freqs.flags = 0; - - cpufreq_suspended = 1; - if (clk_get_rate(cpu_clk) != cpu_wp_tbl[0].cpu_rate) { - set_cpu_freq(cpu_wp_tbl[0].cpu_rate); - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - } -#endif - return 0; -} - -/* - * Called before devices are re-setup. - */ -static void mx51_suspend_finish(void) -{ -#if defined(CONFIG_CPU_FREQ_IMX) - struct cpufreq_freqs freqs; - - freqs.old = clk_get_rate(cpu_clk) / 1000; - freqs.new = org_freq / 1000; - freqs.cpu = 0; - freqs.flags = 0; - - cpufreq_suspended = 0; - - if (org_freq != clk_get_rate(cpu_clk)) { - set_cpu_freq(org_freq); - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - } -#endif -} - -/* - * Called after devices are re-setup, but before processes are thawed. - */ -static void mx51_suspend_end(void) -{ -} - -static int mx51_pm_valid(suspend_state_t state) -{ - return (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX); -} - -struct platform_suspend_ops mx51_suspend_ops = { - .valid = mx51_pm_valid, - .prepare = mx51_suspend_prepare, - .enter = mx51_suspend_enter, - .finish = mx51_suspend_finish, - .end = mx51_suspend_end, -}; - - -static int __devinit mx51_pm_probe(struct platform_device *pdev) -{ - pm_dev = &pdev->dev; - return 0; -} - -static struct platform_driver mx51_pm_driver = { - .driver = { - .name = "mx51_pm", - }, - .probe = mx51_pm_probe, -}; - -static int __init pm_init(void) -{ - int cpu_wp_nr; - unsigned long iram_paddr; - - pr_info("Static Power Management for Freescale i.MX51\n"); - if (platform_driver_register(&mx51_pm_driver) != 0) { - printk(KERN_ERR "mx51_pm_driver register failed\n"); - return -ENODEV; - } - suspend_set_ops(&mx51_suspend_ops); - /* Move suspend routine into iRAM */ - iram_alloc(SZ_4K, &iram_paddr); - /* Need to remap the area here since we want the memory region - to be executable. */ - suspend_iram_base = __arm_ioremap(iram_paddr, SZ_4K, - MT_HIGH_VECTORS); - memcpy(suspend_iram_base, cpu_do_suspend_workaround, SZ_4K); - suspend_in_iram = (void *)suspend_iram_base; - - cpu_wp_tbl = get_cpu_wp(&cpu_wp_nr); - - cpu_clk = clk_get(NULL, "cpu_clk"); - if (IS_ERR(cpu_clk)) { - printk(KERN_DEBUG "%s: failed to get cpu_clk\n", __func__); - return PTR_ERR(cpu_clk); - } - printk(KERN_INFO "PM driver module loaded\n"); - - return 0; -} - - -static void __exit pm_cleanup(void) -{ - /* Unregister the device structure */ - platform_driver_unregister(&mx51_pm_driver); -} - -module_init(pm_init); -module_exit(pm_cleanup); - -MODULE_AUTHOR("Freescale Semiconductor, Inc."); -MODULE_DESCRIPTION("PM driver"); -MODULE_LICENSE("GPL"); |