From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4397DC38BE0 for ; Mon, 24 Feb 2020 18:54:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2565A2080D for ; Mon, 24 Feb 2020 18:54:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727916AbgBXSyR (ORCPT ); Mon, 24 Feb 2020 13:54:17 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:5614 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727426AbgBXSyR (ORCPT ); Mon, 24 Feb 2020 13:54:17 -0500 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01OInH56098826; Mon, 24 Feb 2020 13:54:12 -0500 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yb1b7mteb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Feb 2020 13:54:12 -0500 Received: from m0098399.ppops.net (m0098399.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 01OIpFKU104621; Mon, 24 Feb 2020 13:54:11 -0500 Received: from ppma02dal.us.ibm.com (a.bd.3ea9.ip4.static.sl-reverse.com [169.62.189.10]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yb1b7mtdt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Feb 2020 13:54:11 -0500 Received: from pps.filterd (ppma02dal.us.ibm.com [127.0.0.1]) by ppma02dal.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 01OIorM7004201; Mon, 24 Feb 2020 18:54:11 GMT Received: from b01cxnp23033.gho.pok.ibm.com (b01cxnp23033.gho.pok.ibm.com [9.57.198.28]) by ppma02dal.us.ibm.com with ESMTP id 2yaux6k9r0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Feb 2020 18:54:11 +0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp23033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01OIsAi810420644 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 24 Feb 2020 18:54:10 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4201EB205F; Mon, 24 Feb 2020 18:54:10 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C38D2B2064; Mon, 24 Feb 2020 18:54:09 +0000 (GMT) Received: from [9.41.103.158] (unknown [9.41.103.158]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Mon, 24 Feb 2020 18:54:09 +0000 (GMT) Subject: Re: [PATCH v2] spi: Add FSI-attached SPI controller driver To: Andy Shevchenko , Eddie James Cc: linux-spi , Linux Kernel Mailing List , Mark Brown , Joel Stanley , Andrew Jeffery References: <20200203223003.4567-1-eajames@linux.ibm.com> From: Eddie James Message-ID: Date: Mon, 24 Feb 2020 12:54:09 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-24_07:2020-02-21,2020-02-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 mlxscore=0 malwarescore=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 bulkscore=0 adultscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002240137 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/4/20 5:05 AM, Andy Shevchenko wrote: > On Tue, Feb 4, 2020 at 12:30 AM Eddie James wrote: >> There exists a set of SPI controllers on some POWER processors that may >> be accessed through the FSI bus. Add a driver to traverse the FSI CFAM >> engine that can access and drive the SPI controllers. This driver would >> typically be used by a baseboard management controller (BMC). >> >> The SPI controllers operate by means of programming a sequencing engine >> which automatically manages the usual SPI protocol buses. The driver >> programs each transfer into the sequencer as various operations >> specifying the slave chip and shifting data in and out on the lines. > Some comments left unsettled in v1, thus applicable here. I think I addressed all of Andy's comments on v1 now, if Andy agreed about leaving the byte shifting as-is in fsi_spi_data_in/out. Thanks, Eddie >