From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752729AbbBXMPq (ORCPT ); Tue, 24 Feb 2015 07:15:46 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:21881 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750850AbbBXMPn (ORCPT ); Tue, 24 Feb 2015 07:15:43 -0500 X-AuditID: cbfee68d-f79296d000004278-dc-54ec6b6dd4f1 Message-id: <54EC6B6D.3050301@samsung.com> Date: Tue, 24 Feb 2015 21:15:41 +0900 From: Chanwoo Choi User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-version: 1.0 To: Arnd Bergmann Cc: kgene@kernel.org, mark.rutland@arm.com, marc.zyngier@arm.com, olof@lixom.net, catalin.marinas@arm.com, will.deacon@arm.com, inki.dae@samsung.com, chanho61.park@samsung.com, sw0312.kim@samsung.com, jh80.chung@samsung.com, ideal.song@samsung.com, a.kesavan@samsung.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 2/8] arm64: dts: exynos: Add dts files for 64-bit Exynos5433 SoC References: <1424755011-15999-1-git-send-email-cw00.choi@samsung.com> <19309272.tlWX2xvTnx@wuerfel> <54EC3DE7.7070306@samsung.com> <5937606.zM91rlE7sS@wuerfel> In-reply-to: <5937606.zM91rlE7sS@wuerfel> Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrHIsWRmVeSWpSXmKPExsWyRsSkWDc3+02IwZ4HFhaP1yxmsvg76Ri7 xftlPYwWl/drW8w/co7VYtff+4wWk+5PYLG48auN1aL/8Wtmi02Pr7FaXN41h81ixvl9QF13 /rFZLL1+kcni1PXPQLHJL9ksXn48weIg6LFm3hpGj9+/JjF6bFrVyeaxeUm9x5UTTawefVtW MXp83iQXwB7FZZOSmpNZllqkb5fAlfG0oYWxYBJPxeNTG9kbGD9zdjFyckgImEjM/7abEcIW k7hwbz0biC0ksJRR4sqEGJiaL2evAsW5gOKLGCU+9R5lhSh6zSix+Dc3iM0roCVx8NZ8FhCb RUBVYtL1TrAaNqD4/hc3wIaKCoRJrJx+hQWiXlDix+R7YLaIgKLE1BfPmEEWMAvMZpZo/7GJ GSQhLBAp8fBnM9TmxYwSrR9+gSU4BTQlrr36C7aBWUBHYn/rNDYIW15i85q3YJMkBOZySPya tIod4iQBiW+TDwGt4wBKyEpsOsAM8ZqkxMEVN1gmMIrNQnLULCRjZyEZu4CReRWjaGpBckFx UnqRoV5xYm5xaV66XnJ+7iZGYLSf/vesdwfj7QPWhxgFOBiVeHgThN+ECLEmlhVX5h5iNAW6 YiKzlGhyPjCl5JXEGxqbGVmYmpgaG5lbmimJ8ypK/QwWEkhPLEnNTk0tSC2KLyrNSS0+xMjE wSnVwChlNmthyEyeJfmnlk7maDH5WzSTq5731+at7qX3S0L1c7gk2rrnqx5b5PJ/89eCM6uN bx87YLs8iHmD6+qg8yfebFmsnBG6/nwyS3reTKXrlY4TLq18UG0Vv2jlAs7vjyQnndc4cctA YW7+fLVJGlMjH0+t1fLd/1/pdZCBUt+7590+Z/JuM5grsRRnJBpqMRcVJwIA/cEErfECAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJKsWRmVeSWpSXmKPExsVy+t9jAd3c7DchBjuP6ls8XrOYyeLvpGPs Fu+X9TBaXN6vbTH/yDlWi11/7zNaTLo/gcXixq82Vov+x6+ZLTY9vsZqcXnXHDaLGef3AXXd +cdmsfT6RSaLU9c/A8Umv2SzePnxBIuDoMeaeWsYPX7/msTosWlVJ5vH5iX1HldONLF69G1Z xejxeZNcAHtUA6NNRmpiSmqRQmpecn5KZl66rZJ3cLxzvKmZgaGuoaWFuZJCXmJuqq2Si0+A rltmDtAHSgpliTmlQKGAxOJiJX07TBNCQ9x0LWAaI3R9Q4LgeowM0EDCGsaMpw0tjAWTeCoe n9rI3sD4mbOLkZNDQsBE4svZq2wQtpjEhXvrgWwuDiGBRYwSn3qPsoIkhAReM0os/s0NYvMK aEkcvDWfBcRmEVCVmHS9E6yGDSi+/8UNsEGiAmESK6dfYYGoF5T4MfkemC0ioCgx9cUzZpAF zAKzmSXaf2xiBkkIC0RKPPzZDLV5MaNE64dfYAlOAU2Ja6/+gm1gFtCR2N86jQ3ClpfYvOYt 8wRGgVlIlsxCUjYLSdkCRuZVjKKpBckFxUnpuYZ6xYm5xaV56XrJ+bmbGMHJ5JnUDsaVDRaH GAU4GJV4eBOE34QIsSaWFVfmHmKU4GBWEuHdEg0U4k1JrKxKLcqPLyrNSS0+xGgKDIOJzFKi yfnARJdXEm9obGJmZGlkbmhhZGyuJM6rZN8WIiSQnliSmp2aWpBaBNPHxMEp1cB4IGxb7JTM j3Uzt0ilLfrMHfx68uK0SuvW+d7n/u1LnzDhaFpm4AOVCYvaLPKEjt7qvrRE6bHwChttphWi kb+fPVc0V/nz4lZQQP6Jo56Xdh+duldIL/hI5IFK5+AFotJn8vb1WC/hZrK+G8sbtj6vq2fG XbdbrQsEf4v92JmV8ORqjury/FVHlViKMxINtZiLihMB00gtUzwDAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/24/2015 06:50 PM, Arnd Bergmann wrote: > On Tuesday 24 February 2015 18:01:27 Chanwoo Choi wrote: >> On 02/24/2015 05:33 PM, Arnd Bergmann wrote: >>> On Tuesday 24 February 2015 14:16:45 Chanwoo Choi wrote: >>>> This patch adds new Exynos5433 dtsi to support 64-bit Exynos5433 SoC based on >>>> Octal core CPUs (quad Cortex-A57 and quad Cortex-A53). And Exynos5433 supports >>>> PSCI (Power State Coordination Interface) v0.1. >>>> >>>> This patch includes following dt node to support Exynos5433 SoC: >>>> 1. Octa core for big.LITTLE architecture >>>> - Cortex-A53 LITTLE Quad-core >>>> - Cortex-A57 big Quad-core >>>> - Support PSCI v0.1 >>> >>> Should we try to come up with a way to better share parts of this with the >>> exynos5 dtsi files you already have in arm32? I suspect that there is a >>> significant overlap. >> >> Currently, 32-bit Exynos5 SoC (which is included in arch/arm/boot/dts) >> didn't support the Cortex-A53/A57 and PSCI. >> >> The 32-bit Exynos5 SoC support the Coretex-A7 or A15 and big.LITTLE Exynos5 SoC >> use the MCPM (Multi-Cluster PM) driver for secondary cpu on/off instead of PSCI. >> > > Yes, I understand that. What I meant is sharing the nodes that are identical > between e.g. all exynos54xx by using a common .dtsi file that can be included > by 5420, 5433 and 5440. Exynos5433 use the quite different base address of each IP from Exynos5250/5420/5800. Exynos5433 SoC cannot use the devicetree node in Exynos5 dtsi (arch/arm/boot/dts/exynos5.dtsi). Thanks, Chanwoo Choi