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>

2 files changed, 1 insertions, 7 deletions

diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
index 83b745a5e1b7..7143d52c25e1 100644
--- a/arch/arm/plat-mxc/include/mach/common.h
+++ b/arch/arm/plat-mxc/include/mach/common.h
@@ -85,7 +85,6 @@ enum mxc_cpu_pwr_mode {
 };
 
 extern void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode);
-extern void (*imx_idle)(void);
 extern void imx_print_silicon_rev(const char *cpu, int srev);
 
 void avic_handle_irq(struct pt_regs *);
diff --git a/arch/arm/plat-mxc/include/mach/system.h b/arch/arm/plat-mxc/include/mach/system.h
index cf88b3593fba..b9895d250167 100644
--- a/arch/arm/plat-mxc/include/mach/system.h
+++ b/arch/arm/plat-mxc/include/mach/system.h
@@ -17,14 +17,9 @@
 #ifndef __ASM_ARCH_MXC_SYSTEM_H__
 #define __ASM_ARCH_MXC_SYSTEM_H__
 
-extern void (*imx_idle)(void);
-
 static inline void arch_idle(void)
 {
-	if (imx_idle != NULL)
-		(imx_idle)();
-	else
-		cpu_do_idle();
+	cpu_do_idle();
 }
 
 void arch_reset(char mode, const char *cmd);