From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751864AbeBWNie (ORCPT ); Fri, 23 Feb 2018 08:38:34 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:48873 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751351AbeBWNic (ORCPT ); Fri, 23 Feb 2018 08:38:32 -0500 From: =?UTF-8?q?Myl=C3=A8ne=20Josserand?= To: maxime.ripard@bootlin.com, linux@armlinux.org.uk, wens@csie.org, robh+dt@kernel.org, mark.rutland@arm.com Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, clabbe.montjoie@gmail.com, thomas.petazzoni@bootlin.com, mylene.josserand@bootlin.com, quentin.schulz@bootlin.com Subject: [PATCH v4 00/10] Sunxi: Add SMP support on A83T Date: Fri, 23 Feb 2018 14:37:32 +0100 Message-Id: <20180223133742.26044-1-mylene.josserand@bootlin.com> X-Mailer: git-send-email 2.11.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello everyone, This is a V4 of my series that adds SMP support for Allwinner sun8i-a83t. Based on sunxi's tree, sunxi/for-next branch. Changes since v3: - Take into account Maxime's reviews: - split the first patch into 4 new patches: add sun9i device tree parsing, rename some variables, add a83t support and finally, add hotplug support. - Move the code of previous patch 07 (to disable CPU0 disabling) into hotplug support patch (see patch 04) - Remove the patch that added PRCM register because it is already available. Because of that, update the device tree parsing to use "sun8i-a83t-r-ccu". - Use a variable to know which SoC we currently have - Take into account Chen-Yu's reviews: create two iounmap functions to release the resources of the device tree parsing. - Take into account Marc's review: Update the code to initialize CNTVOFF register. As there is already assembly code in the driver, I decided to create an assembly file not to mix assembly and C code. For that, I create 3 new patches: move the current assembly code that handles the cluster cache enabling into a file, move the cpu_resume entry in this file and finally, add a new assembly entry to initialize the timer offset for boot CPU and secondary CPUs. Changes since v2: - Rebased my modifications according to new Chen Yu's patch series that adds SMP support for sun9i-a80 (without MCPM). - Split the device-tree patches into 3 patches for CPUCFG, R_CPUCFG and PRCM registers for more visibility. - The hotplug of CPU0 is currently not working (even after trying what Allwinner's code is doing) so remove the possibility of disabling this CPU. Created a new patch for it. Changes since v1: - Add Chen Yu's patch in my series (see path 01) - Add new compatibles for prcm and cpucfg registers for sun8i-a83t. Create two functions to separate the DT parsing of sun9i-a80 and sun8i-a83t. - Thanks to Maxime's review: order device tree's nodes according to physical addresses, remove unused label and fix registers' sizes. Update the commit log and commit title of my last patch (see patch 05). Patch 01: Create a function that handles all the current code doing a device tree parsing. Patch 02: Rename a register to prepare the a83t support with different registers. Patch 03: Convert the sunxi SMP driver to add support for A83T. This SoC has a bit flip that needs to be handled. Patch 04: Add hotplug support for a83t. Remove the possibilite to disable the CPU0 because CPU0 hotplug is currently not working for this SoC. Patch 05-06: Add registers nodes (cpucfg and r_cpucfg) needed for SMP bringup. Patch 07: Add CCI-400 node for a83t. Patch 08: Move the current assembly code into an assembly file Patch 09: Move another assemble code (for resuming) into this file Patch 10: Add a new entry to initialize the timer offset for all CPUs. If you have any remarks/questions, let me know. Thank you in advance, Mylène Mylène Josserand (10): ARM: sun9i: smp: Add sun9i dt parsing function ARM: sun9i: smp: Rename clusters's power-off register ARM: sun8i: smp: Add support for A83T ARM: sun8i: smp: Add hotplug support for sun8i-a83t ARM: dts: sun8i: Add CPUCFG device node for A83T dtsi ARM: dts: sun8i: Add R_CPUCFG device node for the A83T dtsi ARM: dts: sun8i: a83t: Add CCI-400 node ARM: sunxi: smp: Move assembly code into a file ARM: sunxi: smp: Move cpu_resume assembly entry into file ARM: sunxi: smp: Add initialization of CNTVOFF arch/arm/boot/dts/sun8i-a83t.dtsi | 51 ++++++ arch/arm/mach-sunxi/Kconfig | 2 +- arch/arm/mach-sunxi/Makefile | 1 + arch/arm/mach-sunxi/headsmp.S | 99 +++++++++++ arch/arm/mach-sunxi/mc_smp.c | 350 ++++++++++++++++++++++++-------------- arch/arm/mach-sunxi/sunxi.c | 4 + 6 files changed, 383 insertions(+), 124 deletions(-) create mode 100644 arch/arm/mach-sunxi/headsmp.S -- 2.11.0