Lowlevel suspend function is needed for ACPI based suspend/resume,
introduce ARM related lowlevel function in this patch.
Signed-off-by: Graeme Gregory <graeme.greg...@linaro.org>
Signed-off-by: Hanjun Guo <hanjun....@linaro.org>
---
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 908d71b..e108d9c 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 162a1ab..3c8521d 100644
--- a/drivers/acpi/plat/arm-core.c
+++ b/drivers/acpi/plat/arm-core.c
@@ -207,3 +207,10 @@ static int __init parse_acpi(char *arg)
return 0;
}
early_param("acpi", parse_acpi);
+
+/*
+ * acpi_suspend_lowlevel() - save kernel state and suspend.
+ *
+ * TBD when ARM/ARM64 starts to support suspend...
+ */
+int (*acpi_suspend_lowlevel)(void);
--
1.7.9.5
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