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Tue, 7 Feb 2023 00:09:38 -0600 Received: from SATLEXMB03.amd.com (10.181.40.144) by SATLEXMB07.amd.com (10.181.41.45) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Mon, 6 Feb 2023 22:09:37 -0800 Received: from xhdlakshmis40.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2375.34 via Frontend Transport; Tue, 7 Feb 2023 00:09:34 -0600 From: Sai Krishna Potthuri To: Mark Brown , Tudor Ambarus , Pratyush Yadav , "Michael Walle" , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra CC: , , , , , Sai Krishna Potthuri Subject: [PATCH 0/3] spi: spi-cadence-quadspi: Add Rx tuning support for DTR mode Date: Tue, 7 Feb 2023 11:39:21 +0530 Message-ID: <20230207060924.265789-1-sai.krishna.potthuri@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT106:EE_|SJ0PR12MB5674:EE_ X-MS-Office365-Filtering-Correlation-Id: dbb77705-dea4-4068-5f0e-08db08d1e4ed X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Add and update device_id field in spi_mem structure with flash id information. Xilinx Versal Octal SPI driver requires the device id information to perform the Rx tuning operation. Since there is no common Tuning Data Pattern defined across all vendors, controllers like Xilinx Versal Octal SPI which requires Rx tuning to find out the optimal sampling point for data lines, this device id information will be used as a golden data. The reason behind choosing this approach instead of reading the ID again in the controller driver is to make it generic solution. - Other controller drivers which want to use similar tuning process, they will make use of this ID instead of reading the ID again in the driver. - Also, we can avoid hardcoding the command information and initiating the transfer in the controller driver as this should happen from spi-nor. Sai Krishna Potthuri (3): spi: cadence-quadspi: Add support for PHY module and DQS mtd: spi-nor: Add and update device_id field in spi_mem structure spi: cadence-quadspi: Add Rx tuning support for Xilinx Versal OSPI drivers/mtd/spi-nor/core.c | 1 + drivers/spi/spi-cadence-quadspi.c | 226 +++++++++++++++++++++++++++++- include/linux/spi/spi-mem.h | 4 + 3 files changed, 230 insertions(+), 1 deletion(-)