mirror of https://gitee.com/openkylin/linux.git
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/*
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* Static Memory Controller
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/sysdev.h>
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#include <mach/hardware.h>
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#include <mach/smemc.h>
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#ifdef CONFIG_PM
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static unsigned long msc[2];
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static unsigned long sxcnfg, memclkcfg;
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static unsigned long csadrcfg[4];
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static int pxa3xx_smemc_suspend(struct sys_device *dev, pm_message_t state)
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{
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msc[0] = __raw_readl(MSC0);
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msc[1] = __raw_readl(MSC1);
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sxcnfg = __raw_readl(SXCNFG);
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memclkcfg = __raw_readl(MEMCLKCFG);
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csadrcfg[0] = __raw_readl(CSADRCFG0);
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csadrcfg[1] = __raw_readl(CSADRCFG1);
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csadrcfg[2] = __raw_readl(CSADRCFG2);
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csadrcfg[3] = __raw_readl(CSADRCFG3);
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return 0;
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}
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static int pxa3xx_smemc_resume(struct sys_device *dev)
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{
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__raw_writel(msc[0], MSC0);
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__raw_writel(msc[1], MSC1);
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__raw_writel(sxcnfg, SXCNFG);
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__raw_writel(memclkcfg, MEMCLKCFG);
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__raw_writel(csadrcfg[0], CSADRCFG0);
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__raw_writel(csadrcfg[1], CSADRCFG1);
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__raw_writel(csadrcfg[2], CSADRCFG2);
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__raw_writel(csadrcfg[3], CSADRCFG3);
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return 0;
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}
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static struct sysdev_class smemc_sysclass = {
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.name = "smemc",
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.suspend = pxa3xx_smemc_suspend,
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.resume = pxa3xx_smemc_resume,
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};
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static struct sys_device smemc_sysdev = {
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.id = 0,
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.cls = &smemc_sysclass,
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};
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static int __init smemc_init(void)
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{
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int ret = 0;
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if (cpu_is_pxa3xx()) {
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ret = sysdev_class_register(&smemc_sysclass);
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if (ret)
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return ret;
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ret = sysdev_register(&smemc_sysdev);
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}
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return ret;
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}
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subsys_initcall(smemc_init);
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#endif
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