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spi: Add spi_is_bpw_supported() 

Lets client drivers check and potentially handle issues.
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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.
This commit is contained in:
Mark Brown 2019-05-12 12:08:03 +09:00
parent 47300728fb e6f3f7e4dc
commit e727d4cbc7
1 changed files with 20 additions and 0 deletions
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20
include/linux/spi/spi.h
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@ -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 */