From 76457eea24db3c7d51f623c08838bbffda6ac3ad Mon Sep 17 00:00:00 2001 From: Sowjanya Komatineni Date: Thu, 4 Apr 2019 17:14:01 -0700 Subject: [PATCH] spi: tegra114: use unpacked mode for below 4 bytes Packed mode expects minimum transfer length of 4 bytes. This patch fixes this by using unpacked mode for transfers less than 4 bytes. Signed-off-by: Sowjanya Komatineni Signed-off-by: Mark Brown --- drivers/spi/spi-tegra114.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c index c2ebf1ae632d..ea67ff3b5b2c 100644 --- a/drivers/spi/spi-tegra114.c +++ b/drivers/spi/spi-tegra114.c @@ -259,7 +259,8 @@ static unsigned tegra_spi_calculate_curr_xfer_param( tspi->bytes_per_word = DIV_ROUND_UP(bits_per_word, 8); - if (bits_per_word == 8 || bits_per_word == 16 || bits_per_word == 32) { + if ((bits_per_word == 8 || bits_per_word == 16 || + bits_per_word == 32) && t->len > 3) { tspi->is_packed = 1; tspi->words_per_32bit = 32/bits_per_word; } else {