linux-kernel - [PATCH v2 5/8] ARM: Exynos: use generic cpufreq driver for Exynos5420

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Date:	Tue, 21 Apr 2015 17:49:02 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Thomas Abraham <thomas.ab@...sung.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Mike Turquette <mturquette@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Tomasz Figa <tomasz.figa@...il.com>,
	Lukasz Majewski <l.majewski@...sung.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Kevin Hilman <khilman@...aro.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	b.zolnierkie@...sung.com
Subject: [PATCH v2 5/8] ARM: Exynos: use generic cpufreq driver for Exynos5420

From: Thomas Abraham <thomas.ab@...sung.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

Cc: Tomasz Figa <tomasz.figa@...il.com>
Cc: Kukjin Kim <kgene.kim@...sung.com>
Cc: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Signed-off-by: Thomas Abraham <thomas.ab@...sung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
 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 4b03a32..11ac7fb 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -207,6 +207,13 @@ 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 */ }
 };
 
-- 
1.7.9.5

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