From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753911AbbLIELz (ORCPT ); Tue, 8 Dec 2015 23:11:55 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:38058 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753882AbbLIELv (ORCPT ); Tue, 8 Dec 2015 23:11:51 -0500 MIME-version: 1.0 Content-type: text/plain; charset=utf-8 X-AuditID: cbfee690-f79646d000001316-22-5667a9fb632a Content-transfer-encoding: 8BIT Message-id: <5667A9FA.8090802@samsung.com> Date: Wed, 09 Dec 2015 13:11:38 +0900 From: Chanwoo Choi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 To: Anand Moon Cc: MyungJoo Ham , Kyungmin Park , Kukjin Kim , =?UTF-8?B?S3J6eXN6dG9mIEtvesWCb3dza2k=?= , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , Tobias Jakobi , LKML , Linux PM list , Linux Samsung SoC , devicetree Subject: Re: [RFC PATCH 01/15] PM / devfreq: exynos: Add generic exynos bus frequency driver References: <1448545659-32287-1-git-send-email-cw00.choi@samsung.com> <1448545659-32287-2-git-send-email-cw00.choi@samsung.com> <5657A4F8.4080003@samsung.com> In-reply-to: <5657A4F8.4080003@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrPIsWRmVeSWpSXmKPExsWyRsSkWPf3yvQwg5VruS3mHznHatH/ZiGr xblXKxktXr8wtOh//JrZ4mzTG3aLy7vmsFl87j3CaDHj/D4mi3Ubb7Fb3L7Ma7H0+kUmi+eb OlktJkxfy2LRuvcIu0Xb6g+sDgIea+atYfRoae5h87jc18vksXPWXXaPlcu/sHlsWtXJ5vHv GLtH35ZVjB6fN8kFcEZx2aSk5mSWpRbp2yVwZey7/Z+l4K5gxZ/tj9gbGJfydTFyckgImEgs 2/eZFcIWk7hwbz1bFyMXh5DACkaJ2fMnMcEU7Wu8xwyRWMoosXhVNyNIgldAUOLH5HssXYwc HMwC8hJHLmVDmOoSU6bkQpQ/YJQ4ve0qK0S5lsSs+1/AWlkEVCUON7wDm88GFN//4gYbSK+o QIRE94lKkLCIgJrElacrWEHmMAt0skr83XaTDSQhLBAncfzzC3aIBd+ZJFZ92AU2iFNAW+LD qvdgh0oIbOGQWPNxHhPENgGJb5MPgR0qISArsekAM8RjkhIHV9xgmcAoNgvJO7MQ3pmF8M4C RuZVjKKpBckFxUnpRSZ6xYm5xaV56XrJ+bmbGIHxfvrfswk7GO8dsD7EKMDBqMTDe8ElPUyI NbGsuDL3EKMp0A0TmaVEk/OBSSWvJN7Q2MzIwtTE1NjI3NJMSZz3tdTPYCGB9MSS1OzU1ILU ovii0pzU4kOMTBycUg2Mercmenzwu3/qNqtI5DOWA1tvtb3//fHgIr//8nozruutFt3NyVur yNfy8p+28vHFy956WnxfFyQ+XWnu/EiG3903nvAl/3Px0JZtZqna0RtifOSFGLPRXTcNkYTO jTNUjr3Z7uHwUvny8a8JT0+3+ntLPjq2jUc397GORMJSAZfF7zcd2OwipcRSnJFoqMVcVJwI AG5rhNDyAgAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrDKsWRmVeSWpSXmKPExsVy+t9jAd3fK9PDDObsZLGYf+Qcq0X/m4Ws FuderWS0eP3C0KL/8Wtmi7NNb9gtLu+aw2bxufcIo8WM8/uYLNZtvMVucfsyr8XS6xeZLJ5v 6mS1mDB9LYtF694j7BZtqz+wOgh4rJm3htGjpbmHzeNyXy+Tx85Zd9k9Vi7/wuaxaVUnm8e/ Y+wefVtWMXp83iQXwBnVwGiTkZqYklqkkJqXnJ+SmZduq+QdHO8cb2pmYKhraGlhrqSQl5ib aqvk4hOg65aZA/SFkkJZYk4pUCggsbhYSd8O04TQEDddC5jGCF3fkCC4HiMDNJCwhjFj3+3/ LAV3BSv+bH/E3sC4lK+LkZNDQsBEYl/jPWYIW0ziwr31bF2MXBxCAksZJRav6mYESfAKCEr8 mHyPpYuRg4NZQF7iyKVsCFNdYsqUXIjyB4wSp7ddZYUo15KYdf8LWCuLgKrE4YZ3TCA2G1B8 /4sbbCC9ogIREt0nKkHCIgJqEleermAFmcMs0Mkq8XfbTTaQhLBAnMTxzy/YIRZ8Z5JY9WEX 2CBOAW2JD6veM09gFJiF5LxZCOfNQjhvASPzKkaJ1ILkguKk9FyjvNRyveLE3OLSvHS95Pzc TYzglPJMegfj4V3uhxgFOBiVeHgvuKSHCbEmlhVX5h5ilOBgVhLh1aoFCvGmJFZWpRblxxeV 5qQWH2I0BfpvIrOUaHI+MN3llcQbGpuYGVkamRtaGBmbK4nz7rsUGSYkkJ5YkpqdmlqQWgTT x8TBKdXAuOvV2+e7QrgbDq44s93/kIGos6Zg9ePXd1s/bz24r3JSlUHFLdXOvi6WnUtLF/6d 3LznxbPYux8jmg7xG/HUH6/23/lhkprSacND7eXqhxafud79/uW2tUsq71ZsiT2w2uFql4AT z7k3UwveeX858WjXxL7VGicEXH254iekMAm177jPcvi02A8lluKMREMt5qLiRAAAclUxPwMA AA== 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 Hi Anand, On 2015년 11월 27일 09:34, Chanwoo Choi wrote: > Hi Anand, > > On 2015년 11월 27일 02:17, Anand Moon wrote: >> Hi Chanwoo, >> >> On 26 November 2015 at 21:42, Chanwoo Choi wrote: >>> On Thu, Nov 26, 2015 at 11:00 PM, MyungJoo Ham wrote: >>>> On Thu, Nov 26, 2015 at 10:47 PM, Chanwoo Choi wrote: >>>>> This patch adds the generic exynos bus frequency driver for AMBA AXI bus >>>>> of sub-blocks in exynos SoC with DEVFREQ framework. The Samsung Exynos SoC >>>>> have the common architecture for bus between DRAM and sub-blocks in SoC. >>>>> This driver can support the generic bus frequency driver for Exynos SoCs. >>>>> >>>>> In devicetree, Each bus block has a bus clock, regulator, operation-point >>>>> and devfreq-event devices which measure the utilization of each bus block. >>>>> >>>>> Signed-off-by: Chanwoo Choi >>>>> --- >>>>> drivers/devfreq/Kconfig | 15 ++ >>>>> drivers/devfreq/Makefile | 1 + >>>>> drivers/devfreq/exynos/Makefile | 1 + >>>>> drivers/devfreq/exynos/exynos-bus.c | 443 ++++++++++++++++++++++++++++++++++++ >>>>> 4 files changed, 460 insertions(+) >>>>> create mode 100644 drivers/devfreq/exynos/exynos-bus.c >>>>> >>>> >>>> Are we finally getting a common Exynos bus driver with full DT support? >>>> (can this replace both Exynos4/5 drivers and support Exynos7 series?) >>> >>> Yes. >>> This patch-set would support all Exynos SoCs for bus frequency driver. >>> To make sure the support for Exynos7 series, I need to check the TRM >>> document of Exynos7. I think it is possible for support Exynos7. >>> >>> I'm going to test this driver on various Exynos-based board. >>> >>> Regards, >>> Chanwoo Choi >> >> Please do consider Exynos 542x series as well. > > Sure. I'll to test it on Exynos5422-based Odroid-XU3. I send the v2 patchset but this patchset don't include the support of Odroid-XU3 because of only Exynos542x has the special addtional sequence to change the source clock of DRAM. So, I'm going to support the bus frequency on Exynos542x. After completing it, I'll send the separate patches. Thanks, Chanwoo Choi