From mboxrd@z Thu Jan 1 00:00:00 1970 From: fan.chen@mediatek.com (Fan Chen) Date: Fri, 18 Dec 2015 10:42:27 +0800 Subject: [PATCH 0/4] mediatek: Add cpuidle cluster sleep support for MT8173 Message-ID: <1450406551-1741-1-git-send-email-fan.chen@mediatek.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patchset is to enable cpuidle cluster sleep for MT8173, which is based on Lorenzo Pieralisi's patch[1] to give different configuration for each cluster in big.LITTLE architecture. Power domain control flow is the same in both cpu and non-cpu domains, and some of power domains(e.g. cpu clusters, mfg, mm in mt8173) need to set bus protection bits before power off and vice versa on power on. However, in PSCI framework, cpu power domain controlling is hidden in ARM TF but non-cpu ones are controlled in kernel driver so that race condition on accessing bus protection register will happen between cpu power domains and non-cpu ones in runtime once we enable cluster sleep without any protection. Therefore, we also introduce patches to create SIP call API based on Jens Wiklander's patches[2][3] and modify scpsys driver to give an option to put non-cpu power control into ARM TF via SIP call, which gives a way to manage all power domains together in firmware. [1] https://patchwork.kernel.org/patch/6226871/ [2] https://patchwork.kernel.org/patch/7517271/ [3] https://patchwork.kernel.org/patch/7517261/ Fan Chen (1): soc: Mediatek: Create Mediatek SIP call Weiyi Lu (2): arm64: dts: mediatek: Add cluster sleep support on MT8173 arm64: dts: mediatek: Improve cpuidle latency on MT8173 yt.lee (1): soc: mediatek: To move power control logic to ARM TF arch/arm64/boot/dts/mediatek/mt8173.dtsi | 41 ++++++++-- drivers/soc/mediatek/Kconfig | 8 ++ drivers/soc/mediatek/Makefile | 1 + drivers/soc/mediatek/mtk-scpsys.c | 122 +++++++++++++++++++----------- drivers/soc/mediatek/mtk-sip.c | 28 +++++++ include/linux/soc/mediatek/mtk-sip.h | 21 +++++ 6 files changed, 170 insertions(+), 51 deletions(-) create mode 100644 drivers/soc/mediatek/mtk-sip.c create mode 100644 include/linux/soc/mediatek/mtk-sip.h -- 1.7.9.5