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| author | Dinh Nguyen <Dinh.Nguyen@freescale.com> | 2011-03-21 16:30:37 -0500 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-03-23 15:08:15 +0100 |
| commit | 0adf882b6894cd150392400e9642787cf691016a (patch) | |
| tree | d5ad57f8e1feec21d965b897601c2945b130bdab /arch/arm/plat-mxc | |
| parent | b6e89b21824cc37ab19e0209a7754c74d237a123 (diff) | |
| download | blackbird-op-linux-0adf882b6894cd150392400e9642787cf691016a.tar.gz blackbird-op-linux-0adf882b6894cd150392400e9642787cf691016a.zip | |
ARM: mx51: Implement code to allow mx51 to enter WFI
Implement code for MX51 that allows the SoC to enter WFI when
arch_idle is called.
This patch is also necessary for correctly suspending the system.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc')
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/mxc.h | 9 | ||||
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/system.h | 6 |
2 files changed, 14 insertions, 1 deletions
diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h index 3322c7a79c57..1aea818d9d31 100644 --- a/arch/arm/plat-mxc/include/mach/mxc.h +++ b/arch/arm/plat-mxc/include/mach/mxc.h @@ -195,6 +195,15 @@ struct cpu_op { u32 cpu_rate; }; +int tzic_enable_wake(int is_idle); +enum mxc_cpu_pwr_mode { + WAIT_CLOCKED, /* wfi only */ + WAIT_UNCLOCKED, /* WAIT */ + WAIT_UNCLOCKED_POWER_OFF, /* WAIT + SRPG */ + STOP_POWER_ON, /* just STOP */ + STOP_POWER_OFF, /* STOP + SRPG */ +}; + extern struct cpu_op *(*get_cpu_op)(int *op); #endif diff --git a/arch/arm/plat-mxc/include/mach/system.h b/arch/arm/plat-mxc/include/mach/system.h index 95be51bfe9a9..0417da9f710d 100644 --- a/arch/arm/plat-mxc/include/mach/system.h +++ b/arch/arm/plat-mxc/include/mach/system.h @@ -20,6 +20,8 @@ #include <mach/hardware.h> #include <mach/common.h> +extern void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode); + static inline void arch_idle(void) { #ifdef CONFIG_ARCH_MXC91231 @@ -54,7 +56,9 @@ static inline void arch_idle(void) "orr %0, %0, #0x00000004\n" "mcr p15, 0, %0, c1, c0, 0\n" : "=r" (reg)); - } else + } else if (cpu_is_mx51()) + mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF); + else cpu_do_idle(); } |
