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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=FYZcH9YCAV2D9xJRlKDws3xYJbeunSuHP5OJ4xopk5U=; b=UajCCIiIHQCAjKqrUXch2em/y6Z97KxpdHTdCUKSTmvGpi+HKQv9h9XbvOZclVagf5 25EdjAwAYOYaxi4DgT2uhO+nb4ckxTTlFT2Uo6zalKP5qqHf7TF3molCIEgp+aPVDnez tDebqT4ikUkU/t2c8lTwBJPcK+d0XvhHg+ERHyMBRFILq9lLQA+3WpDqkLs4VBxEndI7 iBqugIsferLlwdzL5nbaiKxaJK1KUMrHpnx4TgqHi6J3rm2ncr7YTrYK918LW1zCmyMK jipl7PgFp0WRTEd5InNNl2PAO/XIqYXmBTCQxcrq+Y09Rgrjt/2ZqN4cJRQqGFRCrvRl YlPQ== X-Gm-Message-State: AOAM530F7TQrwGUANd+fjpTKxeIVsoKkwsGDjHeX/gdgenYu934saiHK R8+L3V34bGdAfz+ojSCpdygHi6fid906Ve6rOps= X-Google-Smtp-Source: ABdhPJw7r9fTtiY0V63BhtDgkS/1VuVZSmoZam4NKdSyg6P5i4KlsKliKnLpusFiTessmcmOsEUwrNO8miMsJEyN4oY= X-Received: by 2002:a92:de10:: with SMTP id x16mr5352212ilm.6.1592341091058; Tue, 16 Jun 2020 13:58:11 -0700 (PDT) MIME-Version: 1.0 References: <20200616081230.31198-1-m.szyprowski@samsung.com> In-Reply-To: <20200616081230.31198-1-m.szyprowski@samsung.com> From: Anand Moon Date: Wed, 17 Jun 2020 02:28:01 +0530 Message-ID: Subject: Re: [PATCH 0/4] Restore big.LITTLE cpuidle driver for Exynos To: Marek Szyprowski X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200616_135813_444662_A16A9AA9 X-CRM114-Status: GOOD ( 18.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , Bartlomiej Zolnierkiewicz , Linux PM list , Daniel Lezcano , Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, Lukasz Luba , linux-arm-kernel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Marek, On Tue, 16 Jun 2020 at 13:44, Marek Szyprowski wrote: > > 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. > Thanks for this updates. But I feel some DTS changes are missing for example d2e5c871ed8a drivers: cpuidle: initialize big.LITTLE driver through DT But I feel that this feature is not working as desired since still some missing code changes for cluster idle states are missing. like clock PWR_CTR and PWR_CTRL2. -Anand > 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 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel