ARM: firmware: add AFTR mode support to firmware do_idle method

On some platforms (i.e. EXYNOS ones) more than one idle mode is
available and we need to distinguish them in firmware do_idle method.

Add mode parameter to do_idle firmware method and AFTR mode support
to EXYNOS do_idle implementation.

This change is a preparation for adding secure firmware support to
EXYNOS cpuidle driver.

This patch shouldn't cause any functionality changes.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

2 files changed, 13 insertions, 2 deletions

diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index c218200f8544..2d830df0f647 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -119,6 +119,11 @@ extern void __iomem *sysram_base_addr;
 extern void __iomem *pmu_base_addr;
 void exynos_sysram_init(void);
 
+enum {
+        FW_DO_IDLE_SLEEP,
+        FW_DO_IDLE_AFTR,
+};
+
 void exynos_firmware_init(void);
 
 extern u32 exynos_get_eint_wake_mask(void);
diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index f5e626d55951..e57b7c3039a2 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -28,9 +28,15 @@
 #define EXYNOS_BOOT_ADDR        0x8
 #define EXYNOS_BOOT_FLAG        0xc
 
-static int exynos_do_idle(void)
+static int exynos_do_idle(unsigned long mode)
 {
-        exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
+        switch (mode) {
+        case FW_DO_IDLE_AFTR:
+                exynos_smc(SMC_CMD_CPU0AFTR, 0, 0, 0);
+                break;
+        case FW_DO_IDLE_SLEEP:
+                exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
+        }
         return 0;
 }