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| author | Pratyush Yadav <[email protected]> | 2020-10-05 21:01:26 +0530 |
|---|---|---|
| committer | Vignesh Raghavendra <[email protected]> | 2020-11-09 11:56:16 +0530 |
| commit | 0e30f47232ab57c685258aa91adc3a3e67bd023e (patch) | |
| tree | 81fd5cdadd13f4a44625876a76517a75bf537655 /drivers/fpga/fpga-bridge.c | |
| parent | 6e1bf55d7207aa360c8d1960dfac6af1940bd32e (diff) | |
mtd: spi-nor: add support for DTR protocol
Double Transfer Rate (DTR) is SPI protocol in which data is transferred
on each clock edge as opposed to on each clock cycle. Make
framework-level changes to allow supporting flashes in DTR mode.
Right now, mixed DTR modes are not supported. So, for example a mode
like 4S-4D-4D will not work. All phases need to be either DTR or STR.
The xSPI spec says that "The program commands provide SPI backward
compatible commands for programming data...". So 8D-8D-8D page program
opcodes are populated with using 1S-1S-1S opcodes.
Signed-off-by: Pratyush Yadav <[email protected]>
Signed-off-by: Vignesh Raghavendra <[email protected]>
Reviewed-by: Tudor Ambarus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/fpga-bridge.c')
0 files changed, 0 insertions, 0 deletions