Re: [PATCH] ARM: mach-shmobile: Suspend-to-RAM support

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Thursday, April 28, 2011, Magnus Damm wrote:
> From: Magnus Damm <damm@opensource.se>
> 
> This patch adds a simple Suspend-to-RAM implementation
> for SH-Mobile ARM. The struct shmobile_suspend_ops are
> kept global to allow cpu-specific code to override
> the callbacks if needed.
> 
> Signed-off-by: Magnus Damm <damm@opensource.se>
> ---

I'd like to test some of my patches on top of this one, but I'm not sure
how to wake up the system from sleep.

Thanks,
Rafael


>  arch/arm/mach-shmobile/Makefile              |    3 +
>  arch/arm/mach-shmobile/include/mach/common.h |    1 
>  arch/arm/mach-shmobile/suspend.c             |   47 ++++++++++++++++++++++++++
>  3 files changed, 51 insertions(+)
> 
> --- 0001/arch/arm/mach-shmobile/Makefile
> +++ work/arch/arm/mach-shmobile/Makefile	2011-04-29 00:43:15.000000000 +0900
> @@ -30,6 +30,9 @@ obj-$(CONFIG_ARCH_SH7377)	+= entry-intc.
>  obj-$(CONFIG_ARCH_SH7372)	+= entry-intc.o
>  obj-$(CONFIG_ARCH_SH73A0)	+= entry-gic.o
>  
> +# PM objects
> +obj-$(CONFIG_SUSPEND)		+= suspend.o
> +
>  # Board objects
>  obj-$(CONFIG_MACH_G3EVM)	+= board-g3evm.o
>  obj-$(CONFIG_MACH_G4EVM)	+= board-g4evm.o
> --- 0001/arch/arm/mach-shmobile/include/mach/common.h
> +++ work/arch/arm/mach-shmobile/include/mach/common.h	2011-04-29 00:43:10.000000000 +0900
> @@ -8,6 +8,7 @@ struct clk;
>  extern int clk_init(void);
>  extern void shmobile_handle_irq_intc(struct pt_regs *);
>  extern void shmobile_handle_irq_gic(struct pt_regs *);
> +extern struct platform_suspend_ops shmobile_suspend_ops;
>  
>  extern void sh7367_init_irq(void);
>  extern void sh7367_add_early_devices(void);
> --- /dev/null
> +++ work/arch/arm/mach-shmobile/suspend.c	2011-04-29 00:43:11.000000000 +0900
> @@ -0,0 +1,47 @@
> +/*
> + * Suspend-to-RAM support code for SH-Mobile ARM
> + *
> + *  Copyright (C) 2011 Magnus Damm
> + *
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License.  See the file "COPYING" in the main directory of this archive
> + * for more details.
> + */
> +
> +#include <linux/pm.h>
> +#include <linux/suspend.h>
> +#include <linux/module.h>
> +#include <linux/err.h>
> +#include <asm/system.h>
> +#include <asm/io.h>
> +
> +static int shmobile_suspend_default_enter(suspend_state_t suspend_state)
> +{
> +	cpu_do_idle();
> +	return 0;
> +}
> +
> +static int shmobile_suspend_begin(suspend_state_t state)
> +{
> +	disable_hlt();
> +	return 0;
> +}
> +
> +static void shmobile_suspend_end(void)
> +{
> +	enable_hlt();
> +}
> +
> +struct platform_suspend_ops shmobile_suspend_ops = {
> +	.begin		= shmobile_suspend_begin,
> +	.end		= shmobile_suspend_end,
> +	.enter		= shmobile_suspend_default_enter,
> +	.valid		= suspend_valid_only_mem,
> +};
> +
> +static int __init shmobile_suspend_init(void)
> +{
> +	suspend_set_ops(&shmobile_suspend_ops);
> +	return 0;
> +}
> +late_initcall(shmobile_suspend_init);