diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-27 16:03:32 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-27 16:03:32 -0700 |
commit | d61b7a572b292e2be409e13b4b3adf475f18fb29 (patch) | |
tree | e9d30390860147136c05e66abf1edda1bc5b0562 /arch/arm/mach-s3c24xx/pm-s3c2410.c | |
parent | 18d9946bc7e2252fe3c0f2f609ac383c627edefd (diff) | |
parent | f4e2467bad53023589cbff18dd1ab6e0aa3f004c (diff) |
Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull "ARM: global cleanups" from Arnd Bergmann:
"Quite a bit of code gets removed, and some stuff moved around, mostly
the old samsung s3c24xx stuff. There should be no functional changes
in this series otherwise. Some cleanups have dependencies on other
arm-soc branches and will be sent in the second round.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>"
Fixed up trivial conflicts mainly due to #include's being changes on
both sides.
* tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (121 commits)
ep93xx: Remove unnecessary includes of ep93xx-regs.h
ep93xx: Move EP93XX_SYSCON defines to SoC private header
ep93xx: Move crunch code to mach-ep93xx directory
ep93xx: Make syscon access functions private to SoC
ep93xx: Configure GPIO ports in core code
ep93xx: Move peripheral defines to local SoC header
ep93xx: Convert the watchdog driver into a platform device.
ep93xx: Use ioremap for backlight driver
ep93xx: Move GPIO defines to gpio-ep93xx.h
ep93xx: Don't use system controller defines in audio drivers
ep93xx: Move PHYS_BASE defines to local SoC header file
ARM: EXYNOS: Add clock register addresses for EXYNOS4X12 bus devfreq driver
ARM: EXYNOS: add clock registers for exynos4x12-cpufreq
PM / devfreq: update the name of EXYNOS clock registers that were omitted
PM / devfreq: update the name of EXYNOS clock register
ARM: EXYNOS: change the prefix S5P_ to EXYNOS4_ for clock
ARM: EXYNOS: use static declaration on regarding clock
ARM: EXYNOS: replace clock.c for other new EXYNOS SoCs
ARM: OMAP2+: Fix build error after merge
ARM: S3C24XX: remove call to s3c24xx_setup_clocks
...
Diffstat (limited to 'arch/arm/mach-s3c24xx/pm-s3c2410.c')
-rw-r--r-- | arch/arm/mach-s3c24xx/pm-s3c2410.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/pm-s3c2410.c b/arch/arm/mach-s3c24xx/pm-s3c2410.c new file mode 100644 index 000000000000..03f706dd6009 --- /dev/null +++ b/arch/arm/mach-s3c24xx/pm-s3c2410.c @@ -0,0 +1,180 @@ +/* linux/arch/arm/mach-s3c2410/pm.c + * + * Copyright (c) 2006 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#include <linux/init.h> +#include <linux/suspend.h> +#include <linux/errno.h> +#include <linux/time.h> +#include <linux/device.h> +#include <linux/syscore_ops.h> +#include <linux/gpio.h> +#include <linux/io.h> + +#include <mach/hardware.h> + +#include <asm/mach-types.h> + +#include <mach/regs-gpio.h> +#include <mach/h1940.h> + +#include <plat/cpu.h> +#include <plat/pm.h> + +static void s3c2410_pm_prepare(void) +{ + /* ensure at least GSTATUS3 has the resume address */ + + __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3); + + S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3)); + S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4)); + + if (machine_is_h1940()) { + void *base = phys_to_virt(H1940_SUSPEND_CHECK); + unsigned long ptr; + unsigned long calc = 0; + + /* generate check for the bootloader to check on resume */ + + for (ptr = 0; ptr < 0x40000; ptr += 0x400) + calc += __raw_readl(base+ptr); + + __raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM)); + } + + /* RX3715 and RX1950 use similar to H1940 code and the + * same offsets for resume and checksum pointers */ + + if (machine_is_rx3715() || machine_is_rx1950()) { + void *base = phys_to_virt(H1940_SUSPEND_CHECK); + unsigned long ptr; + unsigned long calc = 0; + + /* generate check for the bootloader to check on resume */ + + for (ptr = 0; ptr < 0x40000; ptr += 0x4) + calc += __raw_readl(base+ptr); + + __raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM)); + } + + if ( machine_is_aml_m5900() ) + s3c2410_gpio_setpin(S3C2410_GPF(2), 1); + + if (machine_is_rx1950()) { + /* According to S3C2442 user's manual, page 7-17, + * when the system is operating in NAND boot mode, + * the hardware pin configuration - EINT[23:21] – + * must be set as input for starting up after + * wakeup from sleep mode + */ + s3c_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPIO_INPUT); + s3c_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPIO_INPUT); + s3c_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPIO_INPUT); + } +} + +static void s3c2410_pm_resume(void) +{ + unsigned long tmp; + + /* unset the return-from-sleep flag, to ensure reset */ + + tmp = __raw_readl(S3C2410_GSTATUS2); + tmp &= S3C2410_GSTATUS2_OFFRESET; + __raw_writel(tmp, S3C2410_GSTATUS2); + + if ( machine_is_aml_m5900() ) + s3c2410_gpio_setpin(S3C2410_GPF(2), 0); +} + +struct syscore_ops s3c2410_pm_syscore_ops = { + .resume = s3c2410_pm_resume, +}; + +static int s3c2410_pm_add(struct device *dev, struct subsys_interface *sif) +{ + pm_cpu_prep = s3c2410_pm_prepare; + pm_cpu_sleep = s3c2410_cpu_suspend; + + return 0; +} + +#if defined(CONFIG_CPU_S3C2410) +static struct subsys_interface s3c2410_pm_interface = { + .name = "s3c2410_pm", + .subsys = &s3c2410_subsys, + .add_dev = s3c2410_pm_add, +}; + +/* register ourselves */ + +static int __init s3c2410_pm_drvinit(void) +{ + return subsys_interface_register(&s3c2410_pm_interface); +} + +arch_initcall(s3c2410_pm_drvinit); + +static struct subsys_interface s3c2410a_pm_interface = { + .name = "s3c2410a_pm", + .subsys = &s3c2410a_subsys, + .add_dev = s3c2410_pm_add, +}; + +static int __init s3c2410a_pm_drvinit(void) +{ + return subsys_interface_register(&s3c2410a_pm_interface); +} + +arch_initcall(s3c2410a_pm_drvinit); +#endif + +#if defined(CONFIG_CPU_S3C2440) +static struct subsys_interface s3c2440_pm_interface = { + .name = "s3c2440_pm", + .subsys = &s3c2440_subsys, + .add_dev = s3c2410_pm_add, +}; + +static int __init s3c2440_pm_drvinit(void) +{ + return subsys_interface_register(&s3c2440_pm_interface); +} + +arch_initcall(s3c2440_pm_drvinit); +#endif + +#if defined(CONFIG_CPU_S3C2442) +static struct subsys_interface s3c2442_pm_interface = { + .name = "s3c2442_pm", + .subsys = &s3c2442_subsys, + .add_dev = s3c2410_pm_add, +}; + +static int __init s3c2442_pm_drvinit(void) +{ + return subsys_interface_register(&s3c2442_pm_interface); +} + +arch_initcall(s3c2442_pm_drvinit); +#endif |