linux-kernel - [PATCH 5/7] ARM: EXYNOS: PM: use c15resume firmware method if secure firmware is enabled

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Date:	Mon, 05 May 2014 12:57:17 +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 5/7] ARM: EXYNOS: PM: use c15resume firmware method if secure
 firmware is enabled

Use c15resume firmware method instead of accessing the registers
directly in exynos_cpu_restore_register() if secure firmware is
enabled.  This affects both PM resume method and cpuidle AFTR mode.

This patch shouldn't cause any functionality changes on boards that
don't use secure firmware.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
 arch/arm/mach-exynos/pm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index 1679c51..18f6bf8 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -26,6 +26,7 @@
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/smp_scu.h>
 #include <asm/suspend.h>
+#include <asm/firmware.h>
 
 #include <plat/cpu.h>
 #include <plat/pm-common.h>
@@ -167,6 +168,9 @@ static void exynos_cpu_restore_register(void)
 {
 	unsigned long tmp;
 
+	if (call_firmware_op(c15resume, save_arm_register) == 0)
+		return;
+
 	/* Restore Power control register */
 	tmp = save_arm_register[0];
 
-- 
1.8.2.3

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