On 09:50 Tue 15 Oct , Daniel Lezcano wrote:
Using the platform driver model is a good way to separate the cpuidle specific code from the low level pm code. It allows to remove the dependency between these two components.
The platform_device is located in the pm code and a 'set' function has been added to set the standby function from the AT91_SOC_START initialization function. Each SoC with a cpuidle driver will set the standby function in the platform_data field at init time. Then pm code will register the cpuidle platform device.
The cpuidle driver will register the platform_driver and use the device's platform_data as a standby callback in the idle path.
Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org
arch/arm/mach-at91/at91rm9200.c | 3 +++ arch/arm/mach-at91/at91sam9260.c | 3 +++ arch/arm/mach-at91/at91sam9261.c | 3 +++ arch/arm/mach-at91/at91sam9263.c | 3 +++ arch/arm/mach-at91/at91sam9g45.c | 3 +++ arch/arm/mach-at91/at91sam9rl.c | 3 +++ arch/arm/mach-at91/cpuidle.c | 29 +++++++++++++++-------------- arch/arm/mach-at91/pm.c | 12 ++++++++++++ arch/arm/mach-at91/pm.h | 4 ++++ 9 files changed, 49 insertions(+), 14 deletions(-)
diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c index 4aad93d..0d234f2 100644 --- a/arch/arm/mach-at91/at91rm9200.c +++ b/arch/arm/mach-at91/at91rm9200.c @@ -27,6 +27,7 @@ #include "generic.h" #include "clock.h" #include "sam9_smc.h" +#include "pm.h" /* --------------------------------------------------------------------
- Clocks
@@ -337,6 +338,8 @@ static void __init at91rm9200_initialize(void) /* Initialize GPIO subsystem */ at91_gpio_init(at91rm9200_gpio, cpu_is_at91rm9200_bga() ? AT91RM9200_BGA : AT91RM9200_PQFP);
- at91_pm_set_standby(at91rm9200_standby);
} diff --git a/arch/arm/mach-at91/at91sam9260.c b/arch/arm/mach-at91/at91sam9260.c index 5de6074..ffe9ce7 100644 --- a/arch/arm/mach-at91/at91sam9260.c +++ b/arch/arm/mach-at91/at91sam9260.c @@ -28,6 +28,7 @@ #include "generic.h" #include "clock.h" #include "sam9_smc.h" +#include "pm.h" /* --------------------------------------------------------------------
- Clocks
@@ -351,6 +352,8 @@ static void __init at91sam9260_initialize(void) /* Register GPIO subsystem */ at91_gpio_init(at91sam9260_gpio, 3);
- at91_pm_set_standby(at91sam9_standby);
} /* -------------------------------------------------------------------- diff --git a/arch/arm/mach-at91/at91sam9261.c b/arch/arm/mach-at91/at91sam9261.c index 0e07932..1edbb6f 100644 --- a/arch/arm/mach-at91/at91sam9261.c +++ b/arch/arm/mach-at91/at91sam9261.c @@ -27,6 +27,7 @@ #include "generic.h" #include "clock.h" #include "sam9_smc.h" +#include "pm.h" /* --------------------------------------------------------------------
- Clocks
@@ -293,6 +294,8 @@ static void __init at91sam9261_initialize(void) /* Register GPIO subsystem */ at91_gpio_init(at91sam9261_gpio, 3);
- at91_pm_set_sandby(at91sam9_standby);
} /* -------------------------------------------------------------------- diff --git a/arch/arm/mach-at91/at91sam9263.c b/arch/arm/mach-at91/at91sam9263.c index 6ce7d18..8c81c89 100644 --- a/arch/arm/mach-at91/at91sam9263.c +++ b/arch/arm/mach-at91/at91sam9263.c @@ -26,6 +26,7 @@ #include "generic.h" #include "clock.h" #include "sam9_smc.h" +#include "pm.h" /* --------------------------------------------------------------------
- Clocks
@@ -330,6 +331,8 @@ static void __init at91sam9263_initialize(void) /* Register GPIO subsystem */ at91_gpio_init(at91sam9263_gpio, 5);
- at91_pm_set_standby(at91sam9263_standby);
} /* -------------------------------------------------------------------- diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c index 474ee04..8460f52 100644 --- a/arch/arm/mach-at91/at91sam9g45.c +++ b/arch/arm/mach-at91/at91sam9g45.c @@ -26,6 +26,7 @@ #include "generic.h" #include "clock.h" #include "sam9_smc.h" +#include "pm.h" /* --------------------------------------------------------------------
- Clocks
@@ -379,6 +380,8 @@ static void __init at91sam9g45_initialize(void) /* Register GPIO subsystem */ at91_gpio_init(at91sam9g45_gpio, 5);
- at91_pm_set_standby(at91sam9g45_standby);
} /* -------------------------------------------------------------------- diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c index d4ec0d9..c7986e4 100644 --- a/arch/arm/mach-at91/at91sam9rl.c +++ b/arch/arm/mach-at91/at91sam9rl.c @@ -27,6 +27,7 @@ #include "generic.h" #include "clock.h" #include "sam9_smc.h" +#include "pm.h" /* --------------------------------------------------------------------
- Clocks
@@ -296,6 +297,8 @@ static void __init at91sam9rl_initialize(void) /* Register GPIO subsystem */ at91_gpio_init(at91sam9rl_gpio, 4);
- at91_pm_set_standby(at91sam9_standby);
} /* -------------------------------------------------------------------- diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c index 4ec6a6d..a077437 100644 --- a/arch/arm/mach-at91/cpuidle.c +++ b/arch/arm/mach-at91/cpuidle.c @@ -21,26 +21,17 @@ #include <linux/export.h> #include <asm/proc-fns.h> #include <asm/cpuidle.h> -#include <mach/cpu.h>
-#include "pm.h" #define AT91_MAX_STATES 2 +static void (*at91_standby)(void);
/* Actual code that puts the SoC in different idle states */ static int at91_enter_idle(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) {
- if (cpu_is_at91rm9200())
at91rm9200_standby();- else if (cpu_is_at91sam9g45())
at91sam9g45_standby();- else if (cpu_is_at91sam9263())
at91sam9263_standby();- else
at91sam9_standby();
- at91_standby(); return index;
} @@ -60,9 +51,19 @@ static struct cpuidle_driver at91_idle_driver = { }; /* Initialize CPU idle by registering the idle states */ -static int __init at91_init_cpuidle(void) +static int at91_cpuidle_probe(struct platform_device *dev) {
- at91_standby = (void *)(dev->dev.platform_data);
- return cpuidle_register(&at91_idle_driver, NULL);
} -device_initcall(at91_init_cpuidle); +static struct platform_driver at91_cpuidle_driver = {
- .driver = {
.name = "cpuidle-at91",.owner = THIS_MODULE,- },
- .probe = at91_cpuidle_probe,
+};
+module_platform_driver(at91_cpuidle_driver); diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 15afb5d..76f8cbf 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -314,6 +314,15 @@ static const struct platform_suspend_ops at91_pm_ops = { .end = at91_pm_end, }; +static struct platform_device at91_cpuidle_device = {
- .name = "cpuidle-at91",
+};
+void at91_pm_set_standby(void (*at91_standby)(void)) +{
- at91_cpuidle_device.dev.platform_data = at91_standby;
+}
set the function pointer in this function and then fill the pdata if !null
I do not like this idea put it in the pdata then reput it in function pointer in patch 3
static int __init at91_pm_init(void) { #ifdef CONFIG_AT91_SLOW_CLOCK @@ -325,6 +334,9 @@ static int __init at91_pm_init(void) /* AT91RM9200 SDRAM low-power mode cannot be used with self-refresh. */ if (cpu_is_at91rm9200()) at91_ramc_write(0, AT91RM9200_SDRAMC_LPR, 0);
if need to move to SoC init too
- if (at91_cpuidle_device.dev.platform_data)
platform_device_register(&at91_cpuidle_device);suspend_set_ops(&at91_pm_ops); diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h index 2f5908f..76dd1a7 100644 --- a/arch/arm/mach-at91/pm.h +++ b/arch/arm/mach-at91/pm.h @@ -11,9 +11,13 @@ #ifndef __ARCH_ARM_MACH_AT91_PM #define __ARCH_ARM_MACH_AT91_PM +#include <asm/proc-fns.h>
#include <mach/at91_ramc.h> #include <mach/at91rm9200_sdramc.h> +extern void at91_pm_set_standby(void (*at91_standby)(void));
/*
- The AT91RM9200 goes into self-refresh mode with this command, and will
- terminate self-refresh automatically on the next SDRAM access.
-- 1.7.9.5