![Rafael J. Wysocki](/assets/img/avatar_default.png)
Replace sysdev classes and struct sys_device objects used for "core" power management by Samsung platforms with struct syscore_ops objects that are simpler. This generally 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> Acked-by: Kukjin Kim <kgene.kim@samsung.com>
173 lines
4.4 KiB
C
173 lines
4.4 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/syscore_ops.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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/* RX3715 and RX1950 use similar to H1940 code and the
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* same offsets for resume and checksum pointers */
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if (machine_is_rx3715() || machine_is_rx1950()) {
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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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if (machine_is_rx1950()) {
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/* According to S3C2442 user's manual, page 7-17,
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* when the system is operating in NAND boot mode,
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* the hardware pin configuration - EINT[23:21] –
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* must be set as input for starting up after
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* wakeup from sleep mode
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*/
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s3c_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPIO_INPUT);
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s3c_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPIO_INPUT);
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s3c_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPIO_INPUT);
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}
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}
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static void s3c2410_pm_resume(void)
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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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}
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struct syscore_ops s3c2410_pm_syscore_ops = {
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.resume = s3c2410_pm_resume,
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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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};
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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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};
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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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};
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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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};
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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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