From 8c6d8319eca370f804fb8e1fcf7070b587d1b81d Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Fri, 11 Nov 2011 13:09:18 +0800 Subject: [PATCH] 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 Signed-off-by: Shawn Guo Acked-by: Russell King Signed-off-by: Sascha Hauer --- arch/arm/mach-imx/mm-imx3.c | 53 +++++++++++++++++---------------- arch/arm/mach-mx5/mm.c | 6 ++-- arch/arm/plat-mxc/include/mach/common.h | 1 - arch/arm/plat-mxc/include/mach/system.h | 7 +---- arch/arm/plat-mxc/system.c | 1 - 5 files changed, 33 insertions(+), 35 deletions(-) diff --git a/arch/arm/mach-imx/mm-imx3.c b/arch/arm/mach-imx/mm-imx3.c index 9f0e82e..6d01de3 100644 --- a/arch/arm/mach-imx/mm-imx3.c +++ b/arch/arm/mach-imx/mm-imx3.c @@ -33,29 +33,32 @@ static void imx3_idle(void) { unsigned long reg = 0; - __asm__ __volatile__( - /* disable I and D cache */ - "mrc p15, 0, %0, c1, c0, 0\n" - "bic %0, %0, #0x00001000\n" - "bic %0, %0, #0x00000004\n" - "mcr p15, 0, %0, c1, c0, 0\n" - /* invalidate I cache */ - "mov %0, #0\n" - "mcr p15, 0, %0, c7, c5, 0\n" - /* clear and invalidate D cache */ - "mov %0, #0\n" - "mcr p15, 0, %0, c7, c14, 0\n" - /* WFI */ - "mov %0, #0\n" - "mcr p15, 0, %0, c7, c0, 4\n" - "nop\n" "nop\n" "nop\n" "nop\n" - "nop\n" "nop\n" "nop\n" - /* enable I and D cache */ - "mrc p15, 0, %0, c1, c0, 0\n" - "orr %0, %0, #0x00001000\n" - "orr %0, %0, #0x00000004\n" - "mcr p15, 0, %0, c1, c0, 0\n" - : "=r" (reg)); + + if (!need_resched()) + __asm__ __volatile__( + /* disable I and D cache */ + "mrc p15, 0, %0, c1, c0, 0\n" + "bic %0, %0, #0x00001000\n" + "bic %0, %0, #0x00000004\n" + "mcr p15, 0, %0, c1, c0, 0\n" + /* invalidate I cache */ + "mov %0, #0\n" + "mcr p15, 0, %0, c7, c5, 0\n" + /* clear and invalidate D cache */ + "mov %0, #0\n" + "mcr p15, 0, %0, c7, c14, 0\n" + /* WFI */ + "mov %0, #0\n" + "mcr p15, 0, %0, c7, c0, 4\n" + "nop\n" "nop\n" "nop\n" "nop\n" + "nop\n" "nop\n" "nop\n" + /* enable I and D cache */ + "mrc p15, 0, %0, c1, c0, 0\n" + "orr %0, %0, #0x00001000\n" + "orr %0, %0, #0x00000004\n" + "mcr p15, 0, %0, c1, c0, 0\n" + : "=r" (reg)); + local_irq_enable(); } static void __iomem *imx3_ioremap(unsigned long phys_addr, size_t size, @@ -143,7 +146,7 @@ void __init imx31_init_early(void) { mxc_set_cpu_type(MXC_CPU_MX31); mxc_arch_reset_init(MX31_IO_ADDRESS(MX31_WDOG_BASE_ADDR)); - imx_idle = imx3_idle; + pm_idle = imx3_idle; imx_ioremap = imx3_ioremap; } @@ -152,7 +155,7 @@ void __init imx35_init_early(void) mxc_set_cpu_type(MXC_CPU_MX35); mxc_iomux_v3_init(MX35_IO_ADDRESS(MX35_IOMUXC_BASE_ADDR)); mxc_arch_reset_init(MX35_IO_ADDRESS(MX35_WDOG_BASE_ADDR)); - imx_idle = imx3_idle; + pm_idle = imx3_idle; imx_ioremap = imx3_ioremap; } diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c index 26eacc9..df4a508f 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) diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h index 83b745a..7143d52 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 cf88b35..b9895d2 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); diff --git a/arch/arm/plat-mxc/system.c b/arch/arm/plat-mxc/system.c index 9dad8dc..a0bcccf 100644 --- a/arch/arm/plat-mxc/system.c +++ b/arch/arm/plat-mxc/system.c @@ -28,7 +28,6 @@ #include #include -void (*imx_idle)(void) = NULL; void __iomem *(*imx_ioremap)(unsigned long, size_t, unsigned int) = NULL; static void __iomem *wdog_base; -- 2.7.4