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 26/26] spi: tegra114: add support for LSBYTE_FIRST
Date: Tue, 26 Mar 2019 22:56:47 -0700 [thread overview]
Message-ID: <1553666207-11414-26-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1553666207-11414-1-git-send-email-skomatineni@nvidia.com>
Some SPI devices expects SPI transfers to be in Least significant byte
first order and some devices expect Most significant byte first order.
This patch adds SPI_LSBYTE_FIRST to supported mode list and implements
configuration accordingly.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/spi/spi-tegra114.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index e1669ab3b0fe..a2e809af96da 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -827,6 +827,11 @@ static u32 tegra_spi_setup_transfer_one(struct spi_device *spi,
else
command1 &= ~SPI_LSBIT_FE;
+ if (spi->mode & SPI_LSBYTE_FIRST)
+ command1 |= SPI_LSBYTE_FE;
+ else
+ command1 &= ~SPI_LSBYTE_FE;
+
if (spi->mode & SPI_3WIRE)
command1 |= SPI_BIDIROE;
else
@@ -1393,7 +1398,8 @@ static int tegra_spi_probe(struct platform_device *pdev)
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST |
- SPI_TX_DUAL | SPI_RX_DUAL | SPI_3WIRE;
+ SPI_TX_DUAL | SPI_RX_DUAL | SPI_3WIRE |
+ SPI_LSBYTE_FIRST;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
master->setup = tegra_spi_setup;
master->cleanup = tegra_spi_cleanup;
--
2.7.4
prev parent reply other threads:[~2019-03-27 5:58 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 ` [PATCH V1 05/26] spi: tegra114: use unpacked mode for below 4 byte transfers Sowjanya Komatineni
2019-04-01 8:26 ` 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 ` Sowjanya Komatineni [this message]
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