zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-davinci/pm.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-davinci/pm.c
new file mode 100644
index 0000000..04c49f7
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-davinci/pm.c
@@ -0,0 +1,159 @@
+/*
+ * DaVinci Power Management Routines
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc. http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/pm.h>
+#include <linux/suspend.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/spinlock.h>
+
+#include <asm/cacheflush.h>
+#include <asm/delay.h>
+#include <asm/io.h>
+
+#include <mach/da8xx.h>
+#include <mach/sram.h>
+#include <mach/pm.h>
+
+#include "clock.h"
+
+#define DEEPSLEEP_SLEEPCOUNT_MASK 0xFFFF
+
+static void (*davinci_sram_suspend) (struct davinci_pm_config *);
+static struct davinci_pm_config *pdata;
+
+static void davinci_sram_push(void *dest, void *src, unsigned int size)
+{
+ memcpy(dest, src, size);
+ flush_icache_range((unsigned long)dest, (unsigned long)(dest + size));
+}
+
+static void davinci_pm_suspend(void)
+{
+ unsigned val;
+
+ if (pdata->cpupll_reg_base != pdata->ddrpll_reg_base) {
+
+ /* Switch CPU PLL to bypass mode */
+ val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
+ val &= ~(PLLCTL_PLLENSRC | PLLCTL_PLLEN);
+ __raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
+
+ udelay(PLL_BYPASS_TIME);
+
+ /* Powerdown CPU PLL */
+ val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
+ val |= PLLCTL_PLLPWRDN;
+ __raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
+ }
+
+ /* Configure sleep count in deep sleep register */
+ val = __raw_readl(pdata->deepsleep_reg);
+ val &= ~DEEPSLEEP_SLEEPCOUNT_MASK,
+ val |= pdata->sleepcount;
+ __raw_writel(val, pdata->deepsleep_reg);
+
+ /* System goes to sleep in this call */
+ davinci_sram_suspend(pdata);
+
+ if (pdata->cpupll_reg_base != pdata->ddrpll_reg_base) {
+
+ /* put CPU PLL in reset */
+ val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
+ val &= ~PLLCTL_PLLRST;
+ __raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
+
+ /* put CPU PLL in power down */
+ val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
+ val &= ~PLLCTL_PLLPWRDN;
+ __raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
+
+ /* wait for CPU PLL reset */
+ udelay(PLL_RESET_TIME);
+
+ /* bring CPU PLL out of reset */
+ val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
+ val |= PLLCTL_PLLRST;
+ __raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
+
+ /* Wait for CPU PLL to lock */
+ udelay(PLL_LOCK_TIME);
+
+ /* Remove CPU PLL from bypass mode */
+ val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
+ val &= ~PLLCTL_PLLENSRC;
+ val |= PLLCTL_PLLEN;
+ __raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
+ }
+}
+
+static int davinci_pm_enter(suspend_state_t state)
+{
+ int ret = 0;
+
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ case PM_SUSPEND_MEM:
+ davinci_pm_suspend();
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct platform_suspend_ops davinci_pm_ops = {
+ .enter = davinci_pm_enter,
+ .valid = suspend_valid_only_mem,
+};
+
+static int __init davinci_pm_probe(struct platform_device *pdev)
+{
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev, "cannot get platform data\n");
+ return -ENOENT;
+ }
+
+ davinci_sram_suspend = sram_alloc(davinci_cpu_suspend_sz, NULL);
+ if (!davinci_sram_suspend) {
+ dev_err(&pdev->dev, "cannot allocate SRAM memory\n");
+ return -ENOMEM;
+ }
+
+ davinci_sram_push(davinci_sram_suspend, davinci_cpu_suspend,
+ davinci_cpu_suspend_sz);
+
+ suspend_set_ops(&davinci_pm_ops);
+
+ return 0;
+}
+
+static int __exit davinci_pm_remove(struct platform_device *pdev)
+{
+ sram_free(davinci_sram_suspend, davinci_cpu_suspend_sz);
+ return 0;
+}
+
+static struct platform_driver davinci_pm_driver = {
+ .driver = {
+ .name = "pm-davinci",
+ .owner = THIS_MODULE,
+ },
+ .remove = __exit_p(davinci_pm_remove),
+};
+
+static int __init davinci_pm_init(void)
+{
+ return platform_driver_probe(&davinci_pm_driver, davinci_pm_probe);
+}
+late_initcall(davinci_pm_init);