arm/imx: remove imx_idle hook and use pm_idle instead

The patch removes imx_idle hook and use pm_idle instead to get imx
arch_idle prepared for the cleanup.  It's suggested by Russel King
as below.

> The final removal of mach/system.h depends on getting rid of the arch_idle
> thing.  While going through these headers, I was dismayed to find these:
>
> arch/arm/mach-s3c2410/include/mach/system.h:void (*s3c24xx_idle)(void);
> arch/arm/plat-mxc/include/mach/system.h:extern void (*imx_idle)(void);
>
> when we have a perfectly good pm_idle hook already in place - so there's
> no excuse for these especially when other platforms are already using
> pm_idle to hook their platform specific idle function into.  This is
> something that better be gone at the next merge window!

Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c
index 26eacc9d0d90..df4a508f240a 100644
--- a/arch/arm/mach-mx5/mm.c
+++ b/arch/arm/mach-mx5/mm.c
@@ -23,7 +23,9 @@
 
 static void imx5_idle(void)
 {
-        mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF);
+        if (!need_resched())
+                mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF);
+        local_irq_enable();
 }
 
 /*
@@ -89,7 +91,7 @@ void __init imx51_init_early(void)
         mxc_set_cpu_type(MXC_CPU_MX51);
         mxc_iomux_v3_init(MX51_IO_ADDRESS(MX51_IOMUXC_BASE_ADDR));
         mxc_arch_reset_init(MX51_IO_ADDRESS(MX51_WDOG1_BASE_ADDR));
-        imx_idle = imx5_idle;
+        pm_idle = imx5_idle;
 }
 
 void __init imx53_init_early(void)