From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: thierry.reding@gmail.com, jonathanh@nvidia.com, talho@nvidia.com,
skomatineni@nvidia.com, broonie@kernel.org, robh+dt@kernel.org,
mark.rutland@arm.com, kyarlagadda@nvidia.com
Cc: ldewangan@nvidia.com, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
devicetree@vger.kernel.org
Subject: [PATCH V1 05/26] spi: tegra114: use unpacked mode for below 4 byte transfers
Date: Tue, 26 Mar 2019 22:56:26 -0700 [thread overview]
Message-ID: <1553666207-11414-5-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1553666207-11414-1-git-send-email-skomatineni@nvidia.com>
Fixes: use unpacked mode when transfer length is less than 4 bytes.
Packed mode expects minimum transfer length of 4 bytes.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.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 dc63536dbda4..716587b663a3 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
next prev parent reply other threads:[~2019-03-27 5:56 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 5:56 [PATCH V1 01/26] spi: tegra114: fix PIO transfer Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 02/26] spi: tegra114: clear packed bit for unpacked mode Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: clear packed bit for unpacked mode" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 03/26] spi: tegra114: fix for unpacked mode transfers Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: fix for unpacked mode transfers" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 04/26] spi: tegra114: use packed mode for 32 bits per word Sowjanya Komatineni
2019-04-01 7:39 ` Mark Brown
2019-04-01 18:38 ` Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: use packed mode for 32 bits per word" to the spi tree Mark Brown
2019-03-27 5:56 ` Sowjanya Komatineni [this message]
2019-04-01 8:26 ` [PATCH V1 05/26] spi: tegra114: use unpacked mode for below 4 byte transfers Mark Brown
2019-03-27 5:56 ` [PATCH V1 06/26] spi: tegra114: terminate dma and reset on transfer timeout Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: terminate dma and reset on transfer timeout" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 07/26] spi: tegra114: flush fifos Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: flush fifos" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 08/26] spi: tegra114: configure dma burst size to fifo trig level Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 09/26] spi: tegra114: dump SPI registers during timeout Sowjanya Komatineni
2019-04-01 7:39 ` Mark Brown
2019-03-27 5:56 ` [PATCH V1 10/26] spi: tegra114: avoid reset call in atomic context Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 11/26] spi: tegra114: reset controller on probe Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: reset controller on probe" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 12/26] spi: tegra114: add SPI_LSB_FIRST support Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: add SPI_LSB_FIRST support" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 13/26] spi: tegra114: add dual mode support Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 14/26] spi: tegra114: add 3 wire transfer " Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 15/26] spi: tegra114: set supported bits_per_word Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 16/26] spi: tegra114: set bus number based on id Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 17/26] spi: tegra114: add support for interrupt mask Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 18/26] spi: tegra114: add support for hw based cs Sowjanya Komatineni
2019-04-01 7:48 ` Mark Brown
2019-04-01 18:40 ` Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 19/26] DT bindings: spi: add spi client device properties Sowjanya Komatineni
2019-04-01 7:37 ` Mark Brown
2019-04-01 17:59 ` Sowjanya Komatineni
2019-04-02 4:52 ` Mark Brown
2019-03-27 5:56 ` [PATCH V1 20/26] spi: tegra114: add support for tuning HW CS timing Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 21/26] DT bindings: spi: add tx/rx clock delay SPI client properties Sowjanya Komatineni
2019-03-31 6:42 ` Rob Herring
2019-04-02 20:27 ` Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 22/26] spi: tegra114: add support for tuning clock delay Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 23/26] spi: tegra114: add support for gpio based cs Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 24/26] spi: tegra114: de-assert CS before SPI mode is reset to its default Sowjanya Komatineni
2019-04-01 7:49 ` Mark Brown
2019-04-01 18:07 ` Sowjanya Komatineni
2019-04-02 4:52 ` Mark Brown
2019-03-27 5:56 ` [PATCH V1 25/26] spi: expand mode and mode_bits support Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 26/26] spi: tegra114: add support for LSBYTE_FIRST Sowjanya Komatineni
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