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

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Message-Id: <1449091167-20758-5-git-send-email-ben@smart-cactus.org>
Date:	Wed,  2 Dec 2015 22:19:19 +0100
From:	Ben Gamari <ben@...rt-cactus.org>
To:	Thomas Abraham <thomas.ab@...sung.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Michael Turquette <mturquette@...libre.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
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@...hile0.org>,
	Tobias Jakobi <tjakobi@...h.uni-bielefeld.de>,
	Anand Moon <linux.amoon@...il.com>,
	linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, b.zolnierkie@...sung.com,
	Mike Turquette <mturquette@...aro.org>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Ben Gamari <ben@...rt-cactus.org>
Subject: [PATCH 04/12] 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

Changes by Ben Gamari:
- rebase

Cc: Tomasz Figa <tomasz.figa@...il.com>
Cc: Mike Turquette <mturquette@...aro.org>
Cc: Thomas Abraham <thomas.ab@...sung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc: Javier Martinez Canillas <javier@....samsung.com> (Mon. 15:01)
Signed-off-by: Thomas Abraham <thomas.ab@...sung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Ben Gamari <ben@...rt-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

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