From d082d36ea82aff6f25e8380770713e6fd0c7290a Mon Sep 17 00:00:00 2001 From: Mike Rapoport <mike@compulab.co.il> Date: Tue, 26 May 2009 09:10:18 +0300 Subject: [ARM] pxa: add ability to set suspend mode PXA processors have several low-power modes. Currently kernel supports only one of these modes for PM_SUSPEND_MEM. This patch adds ability to set desired suspend mode for PXA27x based machines. Signed-off-by: Mike Rapoport <mike@compulab.co.il> Reviewed-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Eric Miao <eric.miao@marvell.com> --- arch/arm/mach-pxa/include/mach/pxa27x.h | 3 +++ arch/arm/mach-pxa/pxa27x.c | 19 ++++++++++++++++++- 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-pxa/include/mach/pxa27x.h b/arch/arm/mach-pxa/include/mach/pxa27x.h index 6876e16c2970..0b702693f458 100644 --- a/arch/arm/mach-pxa/include/mach/pxa27x.h +++ b/arch/arm/mach-pxa/include/mach/pxa27x.h @@ -16,4 +16,7 @@ #define ARB_DMA_PARK (1<<25) /* Be parked with DMA when idle */ #define ARB_CORE_PARK (1<<24) /* Be parked with core when idle */ #define ARB_LOCK_FLAG (1<<23) /* Only Locking masters gain access to the bus */ + +extern int __init pxa27x_set_pwrmode(unsigned int mode); + #endif /* __MACH_PXA27x_H */ diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index c54ad8b3343c..ec68cc16b4e3 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -203,6 +203,23 @@ static struct clk_lookup pxa27x_clkregs[] = { #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] +/* + * allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM + */ +static unsigned int pwrmode = PWRMODE_SLEEP; + +int __init pxa27x_set_pwrmode(unsigned int mode) +{ + switch (mode) { + case PWRMODE_SLEEP: + case PWRMODE_DEEPSLEEP: + pwrmode = mode; + return 0; + } + + return -EINVAL; +} + /* * List of global PXA peripheral registers to preserve. * More ones like CP and general purpose register values are preserved @@ -254,7 +271,7 @@ void pxa27x_cpu_pm_enter(suspend_state_t state) pxa_cpu_standby(); break; case PM_SUSPEND_MEM: - pxa27x_cpu_suspend(PWRMODE_SLEEP); + pxa27x_cpu_suspend(pwrmode); break; } } -- cgit v1.2.3