[PATCH 3/9] arm: add call to CPU idle quirks handler

Paul Osmialowski
2015-06-23T21:19:41Z

Some SoCs need additional actions to be performed after arch idle,
e.g. Kinetis requires invalidation of the I/D bus cache.

Such handler could be held in provided <mach/idle.h> header file.

Signed-off-by: Paul Osmialowski <pawelo-rhuoMcPwk82rDJvtcaxF/A@public.gmane.org>
---
arch/arm/Kconfig | 7 +++++++
arch/arm/kernel/process.c | 7 +++++++
2 files changed, 14 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8e3a833..8ef8f8f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -98,6 +98,13 @@ config ARM_HAS_SG_CHAIN
config NEED_SG_DMA_LENGTH
bool

+config NEED_MACH_IDLE_H
+ bool
+
+config ARM_CPU_IDLE_QUIRKS
+ bool
+ select NEED_MACH_IDLE_H
+
config ARM_DMA_USE_IOMMU
bool
select ARM_HAS_SG_CHAIN
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index f192a2a..0033460 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -37,6 +37,10 @@
#include <asm/tls.h>
#include <asm/vdso.h>

+#ifdef CONFIG_NEED_MACH_IDLE_H
+#include <mach/idle.h>
+#endif
+
#ifdef CONFIG_CC_STACKPROTECTOR
#include <linux/stackprotector.h>
unsigned long __stack_chk_guard __read_mostly;
@@ -70,6 +74,9 @@ void arch_cpu_idle(void)
arm_pm_idle();
else
cpu_do_idle();
+#ifdef CONFIG_ARM_CPU_IDLE_QUIRKS
+ handle_cpu_idle_quirks();
+#endif
local_irq_enable();
}

--
2.3.6

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