linux/arch/arm/mach-pxa/smemc.c
Rafael J. Wysocki 2eaa03b5be ARM / PXA: Use struct syscore_ops for "core" power management
Replace sysdev classes and struct sys_device objects used for "core"
power management by the PXA platform code with struct syscore_ops
objects that are simpler.

This reduces the code size and the kernel memory footprint.  It also
is necessary for removing sysdevs entirely from the kernel in the
future.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-04-24 19:16:09 +02:00

59 lines
1.2 KiB
C

/*
* Static Memory Controller
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/syscore_ops.h>
#include <mach/hardware.h>
#include <mach/smemc.h>
#ifdef CONFIG_PM
static unsigned long msc[2];
static unsigned long sxcnfg, memclkcfg;
static unsigned long csadrcfg[4];
static int pxa3xx_smemc_suspend(void)
{
msc[0] = __raw_readl(MSC0);
msc[1] = __raw_readl(MSC1);
sxcnfg = __raw_readl(SXCNFG);
memclkcfg = __raw_readl(MEMCLKCFG);
csadrcfg[0] = __raw_readl(CSADRCFG0);
csadrcfg[1] = __raw_readl(CSADRCFG1);
csadrcfg[2] = __raw_readl(CSADRCFG2);
csadrcfg[3] = __raw_readl(CSADRCFG3);
return 0;
}
static void pxa3xx_smemc_resume(void)
{
__raw_writel(msc[0], MSC0);
__raw_writel(msc[1], MSC1);
__raw_writel(sxcnfg, SXCNFG);
__raw_writel(memclkcfg, MEMCLKCFG);
__raw_writel(csadrcfg[0], CSADRCFG0);
__raw_writel(csadrcfg[1], CSADRCFG1);
__raw_writel(csadrcfg[2], CSADRCFG2);
__raw_writel(csadrcfg[3], CSADRCFG3);
}
static struct syscore_ops smemc_syscore_ops = {
.suspend = pxa3xx_smemc_suspend,
.resume = pxa3xx_smemc_resume,
};
static int __init smemc_init(void)
{
if (cpu_is_pxa3xx())
register_syscore_ops(&smemc_syscore_ops);
return 0;
}
subsys_initcall(smemc_init);
#endif