Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752891AbdDMK2i (ORCPT ); Thu, 13 Apr 2017 06:28:38 -0400 Received: from mx0a-00176a03.pphosted.com ([67.231.149.52]:58753 "EHLO mx0a-00176a03.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751192AbdDMK2F (ORCPT ); Thu, 13 Apr 2017 06:28:05 -0400 From: Nandor Han To: gregkh@linuxfoundation.org, davem@davemloft.net, geert@linux-m68k.org, mchehab@kernel.org, daniel.vetter@ffwll.ch, linus.walleij@linaro.org, gnurou@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Nandor Han Subject: [PATCH v2 0/4] XRA1403,gpio - add XRA1403 gpio expander driver Date: Thu, 13 Apr 2017 13:27:47 +0300 Message-Id: X-Mailer: git-send-email 2.10.1 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-04-13_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1702020001 definitions=main-1704130087 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2752 Lines: 80 The patchset will add a driver to support basic functionality for XRA1403 device. Features supported: - get/set GPIO direction (input, output) - get/set GPIO level (low, high) Documentation: A gpio-xra1403.txt file was added to document the DTS bindings related to driver. Testing: 1.1 XRA1403 connected to iMX53 MCU 1.2 Use the GPIO tools provided by kernel from tools/gpio dir 2.1 `lsgpio` root@csmon ppd:~# lsgpio GPIO chip: gpiochip8, "xra1403", 16 GPIO lines line 0: unnamed unused [output] line 1: unnamed unused [output] line 2: unnamed unused [output] line 3: unnamed unused [output] line 4: unnamed unused [output] line 5: unnamed unused line 6: unnamed unused line 7: unnamed unused [output] line 8: unnamed unused [output] line 9: unnamed unused line 10: unnamed unused [output] line 11: unnamed unused line 12: unnamed unused line 13: unnamed unused line 14: unnamed unused line 15: unnamed unused [output] GPIO chip: gpiochip7, "xra1403", 16 GPIO lines line 0: unnamed unused line 1: unnamed unused line 2: unnamed unused line 3: unnamed unused line 4: unnamed unused line 5: unnamed unused line 6: unnamed unused line 7: unnamed unused line 8: unnamed unused line 9: unnamed unused line 10: unnamed unused line 11: unnamed unused line 12: unnamed unused line 13: unnamed unused line 14: unnamed unused line 15: unnamed unused 3.1 `gpio-hammer` root@csmon ppd:~# gpio-hammer -n gpiochip8 -o0 -o1 -o2 -o3 Hammer lines [0, 1, 2, 3] on gpiochip8, initial states: [0, 0, 0, 0] [\] [0: 0, 1: 0, 2: 0, 3: 0] ... [\] [0: 1, 1: 1, 2: 1, 3: 1] When using `gpio-hammer` I also attached an oscilloscope to one of the pins and I was able to monitor and validate the GPIO status. Nandor Han (4): dt-bindings: gpio - add exar to vendor prefixes list gpio - Add EXAR XRA1403 SPI GPIO expander driver doc,dts - add XRA1403 DTS binding documentation Add XRA1403 support to MAINTAINERS file .../devicetree/bindings/gpio/gpio-xra1403.txt | 46 ++++ .../devicetree/bindings/vendor-prefixes.txt | 1 + MAINTAINERS | 8 + drivers/gpio/Kconfig | 5 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-xra1403.c | 236 +++++++++++++++++++++ 6 files changed, 297 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xra1403.txt create mode 100644 drivers/gpio/gpio-xra1403.c -- 2.10.1