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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 BDBA7ECDFB3 for ; Tue, 17 Jul 2018 15:31:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7282920877 for ; Tue, 17 Jul 2018 15:31:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7282920877 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.vnet.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729976AbeGQQE0 (ORCPT ); Tue, 17 Jul 2018 12:04:26 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:35502 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729602AbeGQQE0 (ORCPT ); Tue, 17 Jul 2018 12:04:26 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w6HFTD6m000835 for ; Tue, 17 Jul 2018 11:31:15 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0a-001b2d01.pphosted.com with ESMTP id 2k9h49eaux-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 17 Jul 2018 11:31:14 -0400 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 17 Jul 2018 09:31:10 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w6HFV9ZD58720258 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 17 Jul 2018 08:31:09 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1C0D813604F; Tue, 17 Jul 2018 09:31:09 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3F504136051; Tue, 17 Jul 2018 09:31:08 -0600 (MDT) Received: from talon7.ibm.com (unknown [9.41.102.69]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 17 Jul 2018 09:31:08 -0600 (MDT) From: Eddie James To: linux-i2c@vger.kernel.org Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, wsa@the-dreams.de, robh+dt@kernel.org, benh@kernel.crashing.org, joel@jms.id.au, mark.rutland@arm.com, gregkh@linuxfoundation.org, rdunlap@infradead.org, andy.shevchenko@gmail.com, peda@axentia.se, Eddie James Subject: [PATCH v12 0/8] i2c: Add FSI-attached I2C master algorithm Date: Tue, 17 Jul 2018 10:30:58 -0500 X-Mailer: git-send-email 1.8.3.1 X-TM-AS-GCONF: 00 x-cbid: 18071715-8235-0000-0000-00000DD3B61B X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009380; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01062145; UDB=6.00545317; IPR=6.00840002; MB=3.00022173; MTD=3.00000008; XFM=3.00000015; UTC=2018-07-17 15:31:13 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18071715-8236-0000-0000-000041EA1E50 Message-Id: <1531841466-9833-1-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-07-17_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=605 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807170162 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series adds an algorithm for an I2C master physically located on an FSI slave device. The I2C master has multiple ports, each of which may be connected to an I2C slave. Access to the I2C master registers is achieved over FSI bus. Due to the multi-port nature of the I2C master, the driver instantiates a new I2C adapter for each port connected to a slave. The connected ports should be defined in the device tree under the I2C master device. Changes since v11 - Remove I2C_FUNC_10BIT_ADDR since we don't support it - Don't shift the msg->addr when encoding the command; use it as-is Changes since v10 - Add myself to maintainers - Rework the reset path. Use generic bus recovery and only do the reset if SDA is low. - Fixed email signature on dts patch - Pulled in Ben H's fix for use-after-free in remove() Changes since v9 - Switch the status masks to use a combination of bits rather than directly coding the value - Remove the interrupt mask definition as it was unused - Fixed return value of master_xfer function (return number of xfrs, not 0) Changes since v8 - Drop unecessary else statements - Use i++ instead of ++i - Use kzalloc/kfree instead of devm_kzalloc/devm_kfree for port structure - Drop the list_empty check in remove Changes since v7 - Fix grammer in Kconfig (a -> an) - Change I2C registers to use BIT and GENMASK - Remove custom macros and use FIELD_PREP and FIELD_GET - Fix a few unecessary initializations and "return rc" that are always zero - Clean up the read/write fifo functions a bit - Few other clean-up items Changes since v6 - Remove spinlock for reset functionality; it's unecessary and doesn't work with the latest FSI core. - Use a mutex instead of a semaphore, and don't wait for timeout to get the lock. - Use usleeps instead of schedule_timeout; it's not worth the overhead when the wait should be very short in between sending the command and receiving the response. Changes since v5 - Fix reset functionality and do a reset after every transfer failure eajames@linux.vnet.ibm.com (8): dt-bindings: i2c: Add FSI-attached I2C master dt binding documentation i2c: Add FSI-attached I2C master algorithm i2c: fsi: Add port structures i2c: fsi: Add abort and hardware reset procedures i2c: fsi: Add transfer implementation i2c: fsi: Add I2C master locking i2c: fsi: Add bus recovery MAINTAINERS: Add Eddie as the maintainer for the FSI-attached I2C driver Documentation/devicetree/bindings/i2c/i2c-fsi.txt | 40 ++ MAINTAINERS | 8 + drivers/i2c/busses/Kconfig | 11 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-fsi.c | 752 ++++++++++++++++++++++ 5 files changed, 812 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-fsi.txt create mode 100644 drivers/i2c/busses/i2c-fsi.c -- 1.8.3.1