ARM: Exynos: use generic cpufreq driver for Exynos5420

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

Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 266f46e..e37d8f0 100644 (file)
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -234,6 +234,13 @@ struct cpufreq_dt_platform_data cpufreq_dt_pd = {
 static const struct of_device_id exynos_cpufreq_matches[] = {
        { .compatible = "samsung,exynos4210", .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 */ }
 };