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[2620:137:e000::1:20]) by mx.google.com with ESMTP id b126-20020a62cf84000000b0059d96ba730dsi2094835pfg.110.2023.04.13.09.16.03; Thu, 13 Apr 2023 09:16:22 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=i4l2G58c; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229947AbjDMQOD (ORCPT + 99 others); Thu, 13 Apr 2023 12:14:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229591AbjDMQOB (ORCPT ); Thu, 13 Apr 2023 12:14:01 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A37F869E; Thu, 13 Apr 2023 09:14:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681402440; x=1712938440; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=iAGgqsfkVCgnhVtMdEmX8hcxBQ/3qJLFMKe4cTfgjds=; b=i4l2G58ctyfOtAGAcfEBtET1x31eoGKapviFnYyFGpkR4hrM9h/n6o95 lStVu0L0OhsewS8z89rhj08wdoZMa/fkkZ9i5FWgEPU87EY9x8AvaVDsv kALGHk3lDtaKg45gMBpOSLnJavsv/s9DG3BhPqYEFNxRB+D6ZZ2TrstKp 3Pi9S1soexmEYQ74NSVuIj/HJQO30oimAkxgGJ5aoq7LXYytpvUuD44WO DYLYPck8j26m1lMqT19Jtqb0lAezi3zlblD5Qs1/FBLmILptUoL9ozCnU I595hw29qpHfnXjdgcR3h8YUvDwzNj4AvP006bGvQrKXHRjJ4qQ1yFGEo A==; X-IronPort-AV: E=McAfee;i="6600,9927,10679"; a="332966823" X-IronPort-AV: E=Sophos;i="5.99,194,1677571200"; d="scan'208";a="332966823" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2023 09:11:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10679"; a="813506683" X-IronPort-AV: E=Sophos;i="5.99,194,1677571200"; d="scan'208";a="813506683" Received: from smile.fi.intel.com ([10.237.72.54]) by orsmga004.jf.intel.com with ESMTP; 13 Apr 2023 09:10:59 -0700 Received: from andy by smile.fi.intel.com with local (Exim 4.96) (envelope-from ) id 1pmzXE-00GcfK-2T; Thu, 13 Apr 2023 19:10:56 +0300 Date: Thu, 13 Apr 2023 19:10:56 +0300 From: Andy Shevchenko To: Ryan Chen Cc: Brendan Higgins , Benjamin Herrenschmidt , Joel Stanley , Rob Herring , Krzysztof Kozlowski , Andrew Jeffery , Philipp Zabel , Wolfram Sang , linux-i2c@vger.kernel.org, Florian Fainelli , Jean Delvare , William Zhang , Tyrone Ting , Tharun Kumar P , Conor Dooley , Phil Edworthy , openbmc@lists.ozlabs.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v9 2/2 RESEND] i2c: aspeed: support ast2600 i2c new register mode driver Message-ID: References: <20230413075327.1397306-1-ryan_chen@aspeedtech.com> <20230413075327.1397306-3-ryan_chen@aspeedtech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230413075327.1397306-3-ryan_chen@aspeedtech.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 13, 2023 at 03:53:27PM +0800, Ryan Chen wrote: > Add i2c new register mode driver to support AST2600 i2c > new register mode. AST2600 i2c controller have legacy and > new register mode. The new register mode have global register > support 4 base clock for scl clock selection, and new clock > divider mode. The i2c new register mode have separate register > set to control i2c master and slave. There is already i2c-aspeed.c in the kernel. Can you elaborate what's wrong with the extending existing driver? (It seems to me that so called "legacy" mode is exactly what is being serviced by that driver.) -- With Best Regards, Andy Shevchenko