linux-kernel - [PATCH v3 2/4] ARM: EXYNOS: add AFTR mode support to firmware do

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Date:	Wed, 09 Jul 2014 19:17:52 +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 v3 2/4] 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>
---
v3:
- convert 'mode' parameter from int to unsigned long
- rename FW_DO_IDLE_NORMAL to FW_DO_IDLE_SLEEP
- move FW_DO_IDLE_* enums to common.h

 arch/arm/include/asm/firmware.h |  2 +-
 arch/arm/mach-exynos/common.h   |  5 +++++
 arch/arm/mach-exynos/firmware.c | 10 ++++++++--
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h
index 5904f59..89aefe1 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)(unsigned long mode);
 	/*
 	 * Sets boot address of specified physical CPU
 	 */
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index 152b464..297ac39 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -115,6 +115,11 @@ extern void __iomem *sysram_ns_base_addr;
 extern void __iomem *sysram_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 e50b5ec..a52dd975 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -27,9 +27,15 @@
 #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;
 }
 
-- 
1.8.2.3

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