Subject: [PATCH 10/12] ARM: shmobile: r8a7740: Add CPUIdle

From: [email-masked] (Daniel Lezcano)
Date: Mon, 27 May 2013 13:03:31 +0200

On 05/27/2013 10:59 AM, Simon Horman wrote:
> From: Bastian Hecht <[email-masked]>
> 
> We make use of the r8a7740 Suspend To Ram code to plug together a
> CPUIdle driver.
> 
> Signed-off-by: Bastian Hecht <[email-masked]>
> Acked-by: Daniel Lezcano <[email-masked]>
> ---

Shouldn't it go through Rafael's tree ? Or does the patch contains some
dependencies on a code only visible in the ARM tree ?

>  arch/arm/mach-shmobile/Makefile               |    2 +-
>  arch/arm/mach-shmobile/cpuidle-r8a7740.c      |   62 +++++++++++++++++++++++++
>  arch/arm/mach-shmobile/include/mach/r8a7740.h |    1 +
>  arch/arm/mach-shmobile/pm-r8a7740.c           |    1 +
>  4 files changed, 65 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm/mach-shmobile/cpuidle-r8a7740.c
> 
> diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
> index 0568894..2852dcf 100644
> --- a/arch/arm/mach-shmobile/Makefile
> +++ b/arch/arm/mach-shmobile/Makefile
> @@ -30,7 +30,7 @@ obj-$(CONFIG_SUSPEND)		+= suspend.o
>  obj-$(CONFIG_CPU_IDLE)		+= cpuidle.o
>  obj-$(CONFIG_ARCH_SHMOBILE)	+= pm-rmobile.o
>  obj-$(CONFIG_ARCH_SH7372)	+= pm-sh7372.o sleep-sh7372.o
> -obj-$(CONFIG_ARCH_R8A7740)	+= pm-r8a7740.o sleep-r8a7740.o
> +obj-$(CONFIG_ARCH_R8A7740)	+= pm-r8a7740.o sleep-r8a7740.o cpuidle-r8a7740.o
>  obj-$(CONFIG_ARCH_R8A7779)	+= pm-r8a7779.o
>  obj-$(CONFIG_ARCH_SH73A0)	+= pm-sh73a0.o
>  
> diff --git a/arch/arm/mach-shmobile/cpuidle-r8a7740.c b/arch/arm/mach-shmobile/cpuidle-r8a7740.c
> new file mode 100644
> index 0000000..48c7a6c
> --- /dev/null
> +++ b/arch/arm/mach-shmobile/cpuidle-r8a7740.c
> @@ -0,0 +1,62 @@
> +/*
> + * CPUIdle code for SoC r8a7740
> + *
> + * Copyright (C) 2013 Bastian Hecht
> + *
> + * 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/cpuidle.h>
> +#include <linux/module.h>
> +#include <asm/cpuidle.h>
> +#include <mach/common.h>
> +#include <mach/r8a7740.h>
> +
> +#if defined(CONFIG_SUSPEND) && defined(CONFIG_CPU_IDLE)
> +static int r8a7740_enter_a3sm_pll_on(struct cpuidle_device *dev,
> +					struct cpuidle_driver *drv, int index)
> +{
> +	r8a7740_enter_a3sm_common(1);
> +	return 1;
> +}
> +
> +static int r8a7740_enter_a3sm_pll_off(struct cpuidle_device *dev,
> +					struct cpuidle_driver *drv, int index)
> +{
> +	r8a7740_enter_a3sm_common(0);
> +	return 2;
> +}
> +
> +static struct cpuidle_driver r8a7740_cpuidle_driver = {
> +	.name			= "r8a7740_cpuidle",
> +	.owner			= THIS_MODULE,
> +	.en_core_tk_irqen	= 1,
> +	.state_count		= 3,
> +	.safe_state_index	= 0, /* C1 */
> +	.states[0] = ARM_CPUIDLE_WFI_STATE,
> +	.states[1] = {
> +		.name = "C2",
> +		.desc = "A3SM PLL ON",
> +		.exit_latency = 40,
> +		.target_residency = 30 + 40,
> +		.flags = CPUIDLE_FLAG_TIME_VALID,
> +		.enter = r8a7740_enter_a3sm_pll_on,
> +	},
> +	.states[2] = {
> +		.name = "C3",
> +		.desc = "A3SM PLL OFF",
> +		.exit_latency = 120,
> +		.target_residency = 30 + 120,
> +		.flags = CPUIDLE_FLAG_TIME_VALID,
> +		.enter = r8a7740_enter_a3sm_pll_off,
> +	},
> +};
> +
> +void r8a7740_cpuidle_init(void)
> +{
> +	shmobile_cpuidle_set_driver(&r8a7740_cpuidle_driver);
> +}
> +#else
> +void r8a7740_cpuidle_init(void) {}
> +#endif
> diff --git a/arch/arm/mach-shmobile/include/mach/r8a7740.h b/arch/arm/mach-shmobile/include/mach/r8a7740.h
> index 5cfe5d9..3b538e3 100644
> --- a/arch/arm/mach-shmobile/include/mach/r8a7740.h
> +++ b/arch/arm/mach-shmobile/include/mach/r8a7740.h
> @@ -545,6 +545,7 @@ extern void r8a7740_pinmux_init(void);
>  extern void r8a7740_pm_init(void);
>  extern void r8a7740_resume(void);
>  extern void r8a7740_shutdown(void);
> +extern void r8a7740_cpuidle_init(void);
>  extern void r8a7740_enter_a3sm_common(int);
>  
>  #ifdef CONFIG_PM
> diff --git a/arch/arm/mach-shmobile/pm-r8a7740.c b/arch/arm/mach-shmobile/pm-r8a7740.c
> index fe3c867..2f196bd 100644
> --- a/arch/arm/mach-shmobile/pm-r8a7740.c
> +++ b/arch/arm/mach-shmobile/pm-r8a7740.c
> @@ -237,4 +237,5 @@ static void r8a7740_suspend_init(void) {}
>  void __init r8a7740_pm_init(void)
>  {
>  	r8a7740_suspend_init();
> +	r8a7740_cpuidle_init();
>  }
> 

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