linux-kernel - [PATCH v2 3/7] ARM: EXYNOS: add AFTR mode support to firmware do

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Date:	Mon, 02 Jun 2014 14:35:39 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Kukjin Kim <kgene.kim@...sung.com>
Cc:	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	b.zolnierkie@...sung.com
Subject: [PATCH v2 3/7] ARM: EXYNOS: 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 (please note
that do_idle firmware method is unused currently).

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Acked-by: Kyungmin Park <kyungmin.park@...sung.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

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