From mboxrd@z Thu Jan 1 00:00:00 1970 From: hanjun.guo@linaro.org (Hanjun Guo) Date: Fri, 25 Apr 2014 21:20:12 +0800 Subject: [PATCH v3 part1 06/11] ARM64 / ACPI: Introduce lowlevel suspend function In-Reply-To: <1398432017-8506-1-git-send-email-hanjun.guo@linaro.org> References: <1398432017-8506-1-git-send-email-hanjun.guo@linaro.org> Message-ID: <1398432017-8506-7-git-send-email-hanjun.guo@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org acpi_wakeup_address is used on x86 as the address bios jumps into when machine wakes up from suspend. As arm64 does not have such a bios this mechanism will be provided by other means. But the define is still required inside the acpi core. Introduce a null stub for acpi_suspend_lowlevel as this is also required by core. This will be filled in when standards are defined for arm64 ACPI global power states. Signed-off-by: Graeme Gregory Signed-off-by: Hanjun Guo --- 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 3ac9dfb..60e3a72 100644 --- a/arch/arm64/include/asm/acpi.h +++ b/arch/arm64/include/asm/acpi.h @@ -85,6 +85,10 @@ static inline void acpi_disable_pci(void) */ #define cpu_physical_id(cpu) -1 +/* Low-level suspend routine. */ +extern int (*acpi_suspend_lowlevel)(void); +#define acpi_wakeup_address (0) + #endif /* CONFIG_ACPI */ #endif /*_ASM_ACPI_H*/ diff --git a/drivers/acpi/plat/arm-core.c b/drivers/acpi/plat/arm-core.c index e4846fd..aeea64e 100644 --- a/drivers/acpi/plat/arm-core.c +++ b/drivers/acpi/plat/arm-core.c @@ -129,3 +129,10 @@ 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