From 76457eea24db3c7d51f623c08838bbffda6ac3ad Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
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 <skomatineni@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
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 {
--
2.50.1