Hi, This series adds support for Octal DTR mode now that SPI NOR supports these flashes. Patches 1/7 to 4/7 and 6/7 fix some minor bugs and issues. Patche 5/7 lays some groundwork by implementing the supports_op() hook. Patch 7/7 adds the Octal DTR mode support.
While the main aim of this series is to support 8D-8D-8D mode, other modes like 4D-4D-4D or 2S-2S-2S should also now be supported, though they have not been tested. Tested on J721E with Micron MT35XU512ABA and on J7200 with Cypress S28HS512T. Tested on J721E with Micron MT25QU512A (1S-1S-4S) for regressions. Pratyush Yadav (7): spi: cadence-quadspi: Set master max_speed_hz spi: cadence-quadspi: Abort read if dummy cycles required are too many spi: cadence-quadspi: Set dummy cycles from STIG commands spi: cadence-quadspi: Fix dummy cycle calculation when buswidth > 1 spi: cadence-quadspi: Implement a simple supports_op hook spi: cadence-quadspi: Wait at least 500 ms for direct reads spi: cadence-quadspi: Add DTR support drivers/spi/spi-cadence-quadspi.c | 364 ++++++++++++++++++++++++++---- 1 file changed, 325 insertions(+), 39 deletions(-) -- 2.28.0
