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Unverified Commit e727d4cb authored by Mark Brown's avatar Mark Brown
Browse files

Merge tag 'spi-bpw-is-supported' of... 

Merge tag 'spi-bpw-is-supported' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.3

spi: Add spi_is_bpw_supported()

Lets client drivers check and potentially handle issues.
parents 47300728 e6f3f7e4

include/linux/spi/spi.h

+20 −0
Original line number Diff line number Diff line
@@ -1005,6 +1005,26 @@ spi_max_transfer_size(struct spi_device *spi) 
	return min(tr_max, msg_max);

}



/**

 * spi_is_bpw_supported - Check if bits per word is supported

 * @spi: SPI device

 * @bpw: Bits per word

 *

 * This function checks to see if the SPI controller supports @bpw.

 *

 * Returns:

 * True if @bpw is supported, false otherwise.

 */

static inline bool spi_is_bpw_supported(struct spi_device *spi, u32 bpw)

{

	u32 bpw_mask = spi->master->bits_per_word_mask;



	if (bpw == 8 || (bpw <= 32 && bpw_mask & SPI_BPW_MASK(bpw)))

		return true;



	return false;

}



/*---------------------------------------------------------------------------*/



/* SPI transfer replacement methods which make use of spi_res */