Sangbeom Kim wrote:
>
> From: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
>
> Adds suspend-to-ram support for SMDK2416 based on existing 2412 PM code
>
> Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
> Signed-off-by: Sangbeom Kim <sbkim73@xxxxxxxxxxx>
> ---
> Note: it depends on patches:
>
> ARM: S3C24XX: Fix gpiolib support for ports K..M
>
> .../mach-s3c2410/include/mach/regs-s3c2443-clock.h | 2 +
> arch/arm/mach-s3c2416/Kconfig | 6 ++
> arch/arm/mach-s3c2416/Makefile | 2 +-
> arch/arm/mach-s3c2416/irq.c | 2 +
> arch/arm/mach-s3c2416/pm.c | 84
> ++++++++++++++++++++
> 5 files changed, 95 insertions(+), 1 deletions(-)
> create mode 100644 arch/arm/mach-s3c2416/pm.c
>
> diff --git a/arch/arm/mach-s3c2410/include/mach/regs-s3c2443-clock.h
> b/arch/arm/mach-s3c2410/include/mach/regs-s3c2443-clock.h
> index 08ab9df..101aeea 100644
> --- a/arch/arm/mach-s3c2410/include/mach/regs-s3c2443-clock.h
> +++ b/arch/arm/mach-s3c2410/include/mach/regs-s3c2443-clock.h
> @@ -118,6 +118,8 @@
> #define S3C2443_SCLKCON_UARTCLK (1<<8)
> #define S3C2443_SCLKCON_USBHOST (1<<1)
>
> +#define S3C2443_PWRCFG_SLEEP (1<<15)
> +
> #include <asm/div64.h>
>
> static inline unsigned int
> diff --git a/arch/arm/mach-s3c2416/Kconfig b/arch/arm/mach-s3c2416/Kconfig
> index 657e4fe..87b9c9f 100644
> --- a/arch/arm/mach-s3c2416/Kconfig
> +++ b/arch/arm/mach-s3c2416/Kconfig
> @@ -25,6 +25,11 @@ config S3C2416_DMA
> help
> Internal config node for S3C2416 DMA support
>
> +config S3C2416_PM
> + bool
> + help
> + Internal config node to apply S3C2416 power management
> +
> menu "S3C2416 Machines"
>
> config MACH_SMDK2416
> @@ -33,6 +38,7 @@ config MACH_SMDK2416
> select S3C_DEV_FB
> select S3C_DEV_HSMMC
> select S3C_DEV_HSMMC1
> + select S3C2416_PM if PM
> help
> Say Y here if you are using an SMDK2416
>
> diff --git a/arch/arm/mach-s3c2416/Makefile
b/arch/arm/mach-s3c2416/Makefile
> index 6c12c7b..ef038d6 100644
> --- a/arch/arm/mach-s3c2416/Makefile
> +++ b/arch/arm/mach-s3c2416/Makefile
> @@ -11,7 +11,7 @@ obj- :=
>
> obj-$(CONFIG_CPU_S3C2416) += s3c2416.o clock.o
> obj-$(CONFIG_CPU_S3C2416) += irq.o
> -
> +obj-$(CONFIG_S3C2416_PM) += pm.o
> #obj-$(CONFIG_S3C2416_DMA) += dma.o
>
> # Machine support
> diff --git a/arch/arm/mach-s3c2416/irq.c b/arch/arm/mach-s3c2416/irq.c
> index 89f521d..084d121 100644
> --- a/arch/arm/mach-s3c2416/irq.c
> +++ b/arch/arm/mach-s3c2416/irq.c
> @@ -243,6 +243,8 @@ static int __init s3c2416_irq_add(struct sys_device
> *sysdev)
>
> static struct sysdev_driver s3c2416_irq_driver = {
> .add = s3c2416_irq_add,
> + .suspend = s3c24xx_irq_suspend,
> + .resume = s3c24xx_irq_resume,
> };
>
> static int __init s3c2416_irq_init(void)
> diff --git a/arch/arm/mach-s3c2416/pm.c b/arch/arm/mach-s3c2416/pm.c
> new file mode 100644
> index 0000000..4d41f28
> --- /dev/null
> +++ b/arch/arm/mach-s3c2416/pm.c
> @@ -0,0 +1,84 @@
> +/* linux/arch/arm/mach-s3c2416/pm.c
> + *
> + * Copyright (c) 2010 Samsung Electronics Co., Ltd.
> + * http://www.samsung.com/
> + *
> + * S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support)
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> +*/
> +
> +#include <linux/sysdev.h>
> +#include <linux/io.h>
> +
> +#include <asm/cacheflush.h>
> +
> +#include <mach/regs-power.h>
> +#include <mach/regs-s3c2443-clock.h>
> +
> +#include <plat/cpu.h>
> +#include <plat/pm.h>
> +
> +extern void s3c2412_sleep_enter(void);
> +
> +static void s3c2416_cpu_suspend(void)
> +{
> + flush_cache_all();
> +
> + /* enable wakeup sources regardless of battery state */
> + __raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG);
> +
> + /* set the mode as sleep, 2BED represents "Go to BED" */
> + __raw_writel(0x2BED, S3C2443_PWRMODE);
> +
> + s3c2412_sleep_enter();
> +}
> +
> +static void s3c2416_pm_prepare(void)
> +{
> + /*
> + * write the magic value u-boot uses to check for resume into
> + * the INFORM0 register, and ensure INFORM1 is set to the
> + * correct address to resume from.
> + */
> + __raw_writel(0x2BED, S3C2412_INFORM0);
> + __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
> +}
> +
> +static int s3c2416_pm_add(struct sys_device *sysdev)
> +{
> + pm_cpu_prep = s3c2416_pm_prepare;
> + pm_cpu_sleep = s3c2416_cpu_suspend;
> +
> + return 0;
> +}
> +
> +static int s3c2416_pm_suspend(struct sys_device *dev, pm_message_t state)
> +{
> + return 0;
> +}
> +
> +static int s3c2416_pm_resume(struct sys_device *dev)
> +{
> + /* unset the return-from-sleep amd inform flags */
> + __raw_writel(0x0, S3C2443_PWRMODE);
> + __raw_writel(0x0, S3C2412_INFORM0);
> + __raw_writel(0x0, S3C2412_INFORM1);
> +
> + return 0;
> +}
> +
> +static struct sysdev_driver s3c2416_pm_driver = {
> + .add = s3c2416_pm_add,
> + .suspend = s3c2416_pm_suspend,
> + .resume = s3c2416_pm_resume,
> +};
> +
> +static __init int s3c2416_pm_init(void)
> +{
> + return sysdev_driver_register(&s3c2416_sysclass,
&s3c2416_pm_driver);
> +}
> +
> +arch_initcall(s3c2416_pm_init);
> --
Ok...will apply.
Ben, if any problems, please let me know.
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@xxxxxxxxxxx>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
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