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The SPI Multi I/O Bus Controller (RPC-IF) on R-Car Gen4 SoCs is very similar to the RPC-IF on R-Car Gen3 SoCs. It does support four instead of three bits of strobe timing adjustment (STRTIM), and thus requires a new mask and new settings. Inspired by a patch in the BSP by Cong Dang. Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Wolfram Sang <[email protected]> Link: https://lore.kernel.org/r/4d0824bf5ed0fb95c51cd36f9a3f0f562b1a6bf8.1665583089.git.geert+renesas@glider.be Signed-off-by: Krzysztof Kozlowski <[email protected]>