Commits
Geert Uytterhoeven committed 83596fbeb5d
spi: core: Ignore unsupported Dual/Quad Transfer Mode bits The availability of SPI Dual or Quad Transfer Mode as indicated by the "spi-tx-bus-width" and "spi-rx-bus-width" properties in the device tree is a hardware property of the SPI master, SPI slave, and board wiring. Hence the SPI core should not reject an SPI slave because an SPI master driver doesn't (yet) support Dual or Quad Transfer Mode. Change the lack of Dual or Quad Transfer Mode support in the SPI master driver from an error condition to a warning condition, and ignore the unsupported mode bits, falling back to Single Transfer Mode, to avoid breakages when running old kernels with new device trees. Fixes: f477b7fb13df (spi: DUAL and QUAD support) Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org