spi: dw: Introduce spi_frf and STD_SPI

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The DW APB SSI controllers of v4.x and newer and DW AHB SSI controllers
supports enhanced SPI modes which can be defined from SPI_FRF of
DW_SPI_CTRLR0 register. Without enhanced mode, these controllers will
work in the standard spi mode.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@sifive.com>
Co-developed-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Link: https://patch.msgid.link/20260803124044.156998-2-changhuang.liang@starfivetech.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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Sudip Mukherjee 2026-08-03 05:40:34 -07:00 • committed by Mark Brown

parent 075b74841b

commit c87b4ba097

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13

drivers/spi/spi-dw-core.c

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7

drivers/spi/spi-dw.h

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