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Message-ID: <1554423259-26056-2-git-send-email-skomatineni@nvidia.com>
Date: Thu, 4 Apr 2019 17:14:01 -0700
From: Sowjanya Komatineni <skomatineni@...dia.com>
To: <thierry.reding@...il.com>, <jonathanh@...dia.com>,
<talho@...dia.com>, <skomatineni@...dia.com>, <broonie@...nel.org>,
<robh+dt@...nel.org>, <mark.rutland@....com>,
<kyarlagadda@...dia.com>
CC: <ldewangan@...dia.com>, <linux-tegra@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
<devicetree@...r.kernel.org>
Subject: [PATCH V2 02/20] 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@...dia.com>
---
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 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 {
--
2.7.4
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