Unverified Commit 029b42d8 authored Oct 27, 2020 by Oleksij Rempel Committed by Mark Brown Nov 11, 2020

spi: introduce SPI_MODE_X_MASK macro



Provide a macro to filter all SPI_MODE_0,1,2,3 mode in one run.

The latest SPI framework will parse the devicetree in following call
sequence: of_register_spi_device() -> of_spi_parse_dt()
So, driver do not need to pars the devicetree and will get prepared
flags in the probe.

On one hand it is good far most drivers. On other hand some drivers need to
filter flags provide by SPI framework and apply know to work flags. This drivers
may use SPI_MODE_X_MASK to filter MODE flags and set own, known flags:
  spi->flags &= ~SPI_MODE_X_MASK;
  spi->flags |= SPI_MODE_0;

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20201027095724.18654-2-o.rempel@pengutronix.de


Signed-off-by: Mark Brown <broonie@kernel.org>

parent 1dcbdd94

include/linux/spi/spi.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -171,6 +171,7 @@ struct spi_device {
		#define SPI_MODE_1 (0\|SPI_CPHA)
		#define SPI_MODE_2 (SPI_CPOL\|0)
		#define SPI_MODE_3 (SPI_CPOL\|SPI_CPHA)
		#define SPI_MODE_X_MASK (SPI_CPOL\|SPI_CPHA)
		#define SPI_CS_HIGH 0x04 /* chipselect active high? */
		#define SPI_LSB_FIRST 0x08 /* per-word bits-on-wire */
		#define SPI_3WIRE 0x10 /* SI/SO signals shared */

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