f0176794b6
Add a sysdev S3C2410A sysdev to allow the differentiation of the S3C2410A from the S3C2410. This is needed for the CPUFREQ code to enable the extra features and update cpu specific information. Signed-off-by: Ben Dooks <ben@simtec.co.uk> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
163 lines
4 KiB
C
163 lines
4 KiB
C
/* linux/arch/arm/mach-s3c2410/pm.c
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*
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* Copyright (c) 2006 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/suspend.h>
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#include <linux/errno.h>
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#include <linux/time.h>
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#include <linux/sysdev.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <mach/regs-gpio.h>
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#include <mach/h1940.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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static void s3c2410_pm_prepare(void)
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{
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/* ensure at least GSTATUS3 has the resume address */
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__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3);
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S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
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S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
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if (machine_is_h1940()) {
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void *base = phys_to_virt(H1940_SUSPEND_CHECK);
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unsigned long ptr;
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unsigned long calc = 0;
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/* generate check for the bootloader to check on resume */
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for (ptr = 0; ptr < 0x40000; ptr += 0x400)
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calc += __raw_readl(base+ptr);
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__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
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}
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/* the RX3715 uses similar code and the same H1940 and the
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* same offsets for resume and checksum pointers */
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if (machine_is_rx3715()) {
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void *base = phys_to_virt(H1940_SUSPEND_CHECK);
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unsigned long ptr;
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unsigned long calc = 0;
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/* generate check for the bootloader to check on resume */
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for (ptr = 0; ptr < 0x40000; ptr += 0x4)
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calc += __raw_readl(base+ptr);
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__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
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}
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if ( machine_is_aml_m5900() )
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s3c2410_gpio_setpin(S3C2410_GPF(2), 1);
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}
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static int s3c2410_pm_resume(struct sys_device *dev)
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{
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unsigned long tmp;
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/* unset the return-from-sleep flag, to ensure reset */
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tmp = __raw_readl(S3C2410_GSTATUS2);
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tmp &= S3C2410_GSTATUS2_OFFRESET;
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__raw_writel(tmp, S3C2410_GSTATUS2);
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if ( machine_is_aml_m5900() )
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s3c2410_gpio_setpin(S3C2410_GPF(2), 0);
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return 0;
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}
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static int s3c2410_pm_add(struct sys_device *dev)
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{
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pm_cpu_prep = s3c2410_pm_prepare;
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pm_cpu_sleep = s3c2410_cpu_suspend;
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return 0;
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}
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#if defined(CONFIG_CPU_S3C2410)
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static struct sysdev_driver s3c2410_pm_driver = {
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.add = s3c2410_pm_add,
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.resume = s3c2410_pm_resume,
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};
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/* register ourselves */
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static int __init s3c2410_pm_drvinit(void)
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{
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return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_pm_driver);
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}
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arch_initcall(s3c2410_pm_drvinit);
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static struct sysdev_driver s3c2410a_pm_driver = {
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.add = s3c2410_pm_add,
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.resume = s3c2410_pm_resume,
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};
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static int __init s3c2410a_pm_drvinit(void)
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{
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return sysdev_driver_register(&s3c2410a_sysclass, &s3c2410a_pm_driver);
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}
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arch_initcall(s3c2410a_pm_drvinit);
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#endif
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#if defined(CONFIG_CPU_S3C2440)
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static struct sysdev_driver s3c2440_pm_driver = {
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.add = s3c2410_pm_add,
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.resume = s3c2410_pm_resume,
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};
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static int __init s3c2440_pm_drvinit(void)
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{
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return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_pm_driver);
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}
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arch_initcall(s3c2440_pm_drvinit);
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#endif
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#if defined(CONFIG_CPU_S3C2442)
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static struct sysdev_driver s3c2442_pm_driver = {
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.add = s3c2410_pm_add,
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.resume = s3c2410_pm_resume,
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};
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static int __init s3c2442_pm_drvinit(void)
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{
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return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_pm_driver);
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}
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arch_initcall(s3c2442_pm_drvinit);
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#endif
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