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Tue, 23 Jul 2019 00:36:48 -0700 Received: from saturn.ad.analog.com (10.48.65.145) by NWD2HUBCAS7.ad.analog.com (10.64.69.107) with Microsoft SMTP Server id 14.3.408.0; Tue, 23 Jul 2019 03:36:49 -0400 From: Alexandru Ardelean To: , , , CC: , , , , Alexandru Ardelean Subject: [PATCH 0/3][V4] iio: imu: Add support for the ADIS16460 IMU Date: Tue, 23 Jul 2019 10:36:37 +0300 Message-ID: <20190723073641.27801-1-alexandru.ardelean@analog.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.55;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(136003)(376002)(346002)(396003)(39860400002)(2980300002)(54534003)(189003)(199004)(7696005)(4326008)(50466002)(8676002)(7636002)(336012)(126002)(48376002)(246002)(305945005)(8936002)(2870700001)(50226002)(107886003)(476003)(426003)(5660300002)(2616005)(486006)(26005)(44832011)(110136005)(54906003)(1076003)(186003)(966005)(2201001)(51416003)(478600001)(47776003)(106002)(2906002)(356004)(6666004)(316002)(36756003)(86362001)(70586007)(70206006)(6306002);DIR:OUT;SFP:1101;SCL:1;SRVR:CY4PR03MB3272;H:nwd2mta1.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail10.analog.com;MX:1;A:1; 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The default CS change delay is 10 uS, while the ADIS16460 requires a minimum of 16 uS. As it turns out, the SPI framework support already has support for this feature, which is currently present in the for-next branch: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git/commit/?h=0ff2de8bb163551ec4230a5a6f3c40c1f6adec4f This changeset now makes use of that feature, to allow longer CS change times (as needed) for ADIS16460. The SPI patch is present in the iio/testing branch, but not present in the iio/togreg branch. Changelog v3 -> v4: * for SPI: no change * for ADIS lib: use existing `cs_change_delay` feature (from SPI) * for DT: no change Changelog v2 -> v3: * for SPI: * used `cs_change_delay` instead of `cs_change_delay_usecs` (i.e. removed `_usecs` suffix * used SPI specific subject line for SPI patch * for ADIS lib: * updated to use the `cs_change_delay` * for DT: * added Rob's `Reviewed-by` tag Changelog v1 -> v2: * for SPI: * renamed `cs_change_stall_delay_us` -> `cs_change_delay_usecs` initial recommendation was `cs_change_delay`, but decided to name this `cs_change_delay_usecs`, since the convention for these delays seems to add the `_usecs` suffix * for ADIS lib: * renamed `stall_delay` -> `cs_change_delay` * removed some assignments of `cs_change_delay` where `cs_change` is not set * for ADIS16460 driver: * fixed license * adjusted to new `cs_change_delay[_usecs]` Alexandru Ardelean (3): iio: imu: adis: Add support for SPI transfer cs_change_delay iio: imu: Add support for the ADIS16460 IMU dt-bindings: iio: imu: add bindings for ADIS16460 .../bindings/iio/imu/adi,adis16460.yaml | 53 ++ MAINTAINERS | 8 + drivers/iio/imu/Kconfig | 12 + drivers/iio/imu/Makefile | 1 + drivers/iio/imu/adis.c | 12 + drivers/iio/imu/adis16460.c | 489 ++++++++++++++++++ include/linux/iio/imu/adis.h | 2 + 7 files changed, 577 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml create mode 100644 drivers/iio/imu/adis16460.c -- 2.20.1