[RFC part1 PATCH 6/7] ARM64 / ACPI: Introduce lowlevel suspend function
From: Hanjun Guo <hidden>
Date: 2013-12-03 16:38:50
Also in:
linux-acpi, lkml
Subsystem:
acpi, arm64 port (aarch64 architecture), the rest · Maintainers:
"Rafael J. Wysocki", Catalin Marinas, Will Deacon, Linus Torvalds
lowlevel suspend function is needed for ACPI based suspend/resume, introduce ARM related lowlevel function in this patch. Signed-off-by: Graeme Gregory <redacted> Signed-off-by: Hanjun Guo <redacted> --- arch/arm64/include/asm/acpi.h | 4 ++++ drivers/acpi/plat/arm-core.c | 7 +++++++ 2 files changed, 11 insertions(+)
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index e9444e4..c830adc 100644
--- a/arch/arm64/include/asm/acpi.h
+++ b/arch/arm64/include/asm/acpi.h@@ -79,6 +79,10 @@ void arch_fix_phys_package_id(int num, u32 slot); /* temperally define -1 to make acpi core compilerable */ #define cpu_physical_id(cpu) -1 +/* Low-level suspend routine. */ +extern int (*acpi_suspend_lowlevel)(void); +#define acpi_wakeup_address (0) + #else /* !CONFIG_ACPI */ #define acpi_disabled 1 /* ACPI sometimes enabled on ARM */ #define acpi_noirq 1 /* ACPI sometimes enabled on ARM */
diff --git a/drivers/acpi/plat/arm-core.c b/drivers/acpi/plat/arm-core.c
index 7b8e64a..2b6df56 100644
--- a/drivers/acpi/plat/arm-core.c
+++ b/drivers/acpi/plat/arm-core.c@@ -217,3 +217,10 @@ static int __init parse_acpi(char *arg) return 0; } early_param("acpi", parse_acpi); + +/* + * acpi_suspend_lowlevel() - save kernel state and suspend. + * + * TBD when when ARM/ARM64 starts to support suspend... + */ +int (*acpi_suspend_lowlevel)(void);
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1.7.9.5