diff mbox series

[V2,02/20] spi: tegra114: use unpacked mode for below 4 bytes

Message ID 1554423259-26056-2-git-send-email-skomatineni@nvidia.com (mailing list archive)
State Accepted
Headers show
Series [V2,01/20] spi: tegra114: fix PIO transfer | expand

Commit Message

Sowjanya Komatineni April 5, 2019, 12:14 a.m. UTC 
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>
---
 drivers/spi/spi-tegra114.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index ba1639310282..3042521c3785 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 {