Unverified Commit e10a6bb5 authored by Kamal Dasu's avatar Kamal Dasu Committed by Mark Brown
Browse files

spi: bcm-qspi: set transfer parameter only if they change 



Check if the transfer parameters have changed from previous settings
before applying new parameters.

Signed-off-by: default avatarKamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20211124193353.32311-3-kdasu.kdev@gmail.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c74526f9

drivers/spi/spi-bcm-qspi.c

+12 −0
Original line number Diff line number Diff line
@@ -598,12 +598,24 @@ static void bcm_qspi_chip_select(struct bcm_qspi *qspi, int cs) 
	qspi->curr_cs = cs;

}



static bool bcmspi_parms_did_change(const struct bcm_qspi_parms * const cur,

				    const struct bcm_qspi_parms * const prev)

{

	return (cur->speed_hz != prev->speed_hz) ||

		(cur->mode != prev->mode) ||

		(cur->bits_per_word != prev->bits_per_word);

}





/* MSPI helpers */

static void bcm_qspi_hw_set_parms(struct bcm_qspi *qspi,

				  const struct bcm_qspi_parms *xp)

{

	u32 spcr, spbr = 0;



	if (!bcmspi_parms_did_change(xp, &qspi->last_parms))

		return;



	if (!qspi->mspi_maj_rev)

		/* legacy controller */

		spcr = MSPI_MASTER_BIT;