[PATCH v2 3/7] ARM: EXYNOS: add AFTR mode support to firmware do_idle method

Bartlomiej Zolnierkiewicz
2014-06-02T12:35:39Z

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 (please note
that do_idle firmware method is unused currently).

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
---
arch/arm/include/asm/firmware.h | 7 ++++++-
arch/arm/mach-exynos/firmware.c | 10 ++++++++--
2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h
index 70883c7..63989c3 100644
--- a/arch/arm/include/asm/firmware.h
+++ b/arch/arm/include/asm/firmware.h
@@ -28,7 +28,7 @@ struct firmware_ops {
/*
* Enters CPU idle mode
*/
- int (*do_idle)(void);
+ int (*do_idle)(int mode);
/*
* Sets boot address of specified physical CPU
*/
@@ -47,6 +47,11 @@ struct firmware_ops {
int (*c15resume)(u32 *regs);
};

+enum {
+ FW_DO_IDLE_NORMAL,
+ FW_DO_IDLE_AFTR,
+};
+
/* Global pointer for current firmware_ops structure, can't be NULL. */
extern const struct firmware_ops *firmware_ops;

diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index 195b65c..3a34132 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -21,9 +21,15 @@
#include "common.h"
#include "smc.h"

-static int exynos_do_idle(void)
+static int exynos_do_idle(int 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_NORMAL:
+ exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
+ }
return 0;
}

--
1.8.2.3