[PATCH 0/4] Restore big.LITTLE cpuidle driver for Exynos

From: Marek Szyprowski <m.szyprowski@samsung.com>
To: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Lukasz Luba <lukasz.luba@arm.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: [PATCH 0/4] Restore big.LITTLE cpuidle driver for Exynos
Date: Tue, 16 Jun 2020 10:12:26 +0200	[thread overview]
Message-ID: <20200616081230.31198-1-m.szyprowski@samsung.com> (raw)
In-Reply-To: CGME20200616081248eucas1p168faa343ce333a28c8fd3cf9a6a58b3c@eucas1p1.samsung.com

The ARM big.LITTLE cpuidle driver has been enabled and tested on Samsung
Exynos 5420/5800 based Peach Pit/Pi Chromebooks and in fact it worked
only on those boards.

However, support for it was broken by the commit 833b5794e330 ("ARM:
EXYNOS: reset Little cores when cpu is up") and then never enabled in the
exynos_defconfig. This patchset provides the needed fix to the common
code and restores support for it. Thanks to Lukasz Luba who motivated me
to take a look into this issue.

Best regards
Marek Szyprowski
Samsung R&D Institute Poland

Patch summary:

Marek Szyprowski (4):
  ARM: exynos: Apply little core workaround only under secure firmware
  cpuidle: big.LITTLE: enable driver only on Peach-Pit/Pi Chromebooks
  ARM: exynos_defconfig: Enable big.LITTLE cpuidle driver
  ARM: multi_v7_defconfig: Enable big.LITTLE cpuidle driver

 arch/arm/configs/exynos_defconfig    |  1 +
 arch/arm/configs/multi_v7_defconfig  |  1 +
 arch/arm/mach-exynos/mcpm-exynos.c   | 10 +++++++---
 drivers/cpuidle/cpuidle-big_little.c |  3 +--
 4 files changed, 10 insertions(+), 5 deletions(-)

-- 
2.17.1