[PATCH 04/12] ARM: Exynos: use generic cpufreq driver for Exynos5420

[Ben Gamari]

From: Thomas Abraham <thomas.ab at samsung.com>

The new CPU clock type allows the use of generic arm_big_little_dt
cpufreq driver for Exynos5420.

Changes by Bartlomiej:
- split Exynos5420 support from the original patch
- disable cpufreq if big.LITTLE switcher support is enabled

Changes by Ben Gamari:
- rebase

Cc: Tomasz Figa <tomasz.figa at gmail.com>
Cc: Mike Turquette <mturquette at linaro.org>
Cc: Thomas Abraham <thomas.ab at samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie at samsung.com>
Cc: Javier Martinez Canillas <javier at osg.samsung.com> (Mon. 15:01)
Signed-off-by: Thomas Abraham <thomas.ab at samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie at samsung.com>
Signed-off-by: Ben Gamari <ben at smart-cactus.org>
---
 arch/arm/mach-exynos/exynos.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 1c47aee..818e6a0 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -230,6 +230,13 @@ static const struct of_device_id exynos_cpufreq_matches[] = {
 	{ .compatible = "samsung,exynos4212", .data = "cpufreq-dt" },
 	{ .compatible = "samsung,exynos4412", .data = "cpufreq-dt" },
 	{ .compatible = "samsung,exynos5250", .data = "cpufreq-dt" },
+	/*
+	 * FIXME: When big.LITTLE switcher is enabled system lockups during
+	 * ondemand governor stress testing (observed on ODROID-XU3 board).
+	 */
+#ifndef CONFIG_BL_SWITCHER
+	{ .compatible = "samsung,exynos5420", .data = "arm-bL-cpufreq-dt" },
+#endif
 	{ /* sentinel */ }
 };
 
-- 
2.6.2