Unverified Commit b4adf5b2 authored by Tomer Maimon's avatar Tomer Maimon Committed by Mark Brown
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spi: npcm-pspi: improve spi transfer performance 



Improving spi 8 bit per word mode transfer performance
by using 16 bit per word transfer and receive when the data
length is even and larger than one.

Signed-off-by: default avatarTomer Maimon <tmaimon77@gmail.com>
Link: https://lore.kernel.org/r/20200115162301.235926-3-tmaimon77@gmail.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 6925212f

drivers/spi/spi-npcm-pspi.c

+7 −0
Original line number Diff line number Diff line
@@ -178,6 +178,13 @@ static void npcm_pspi_setup_transfer(struct spi_device *spi, 
		priv->mode = spi->mode;

	}



	/*

	 * If transfer is even length, and 8 bits per word transfer,

	 * then implement 16 bits-per-word transfer.

	 */

	if (priv->bits_per_word == 8 && !(t->len & 0x1))

		t->bits_per_word = 16;



	if (!priv->is_save_param || priv->bits_per_word != t->bits_per_word) {

		npcm_pspi_set_transfer_size(priv, t->bits_per_word);

		priv->bits_per_word = t->bits_per_word;

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