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From: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
To: "Mark Brown" <broonie@kernel.org>,
"Michal Simek" <michal.simek@xilinx.com>,
"Sören Brinkmann" <soren.brinkmann@xilinx.com>,
linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Subject: [PATCH 02/18] spi/xilinx: Support for spi mode LOOP
Date: Fri, 23 Jan 2015 17:08:34 +0100 [thread overview]
Message-ID: <1422029330-10971-3-git-send-email-ricardo.ribalda@gmail.com> (raw)
In-Reply-To: <1422029330-10971-1-git-send-email-ricardo.ribalda@gmail.com>
Hardware supports LOOP mode. Support it also in the driver.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
drivers/spi/spi-xilinx.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index d4edeee..e1d9a20 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -35,7 +35,7 @@
#define XSPI_CR_CPOL 0x08
#define XSPI_CR_CPHA 0x10
#define XSPI_CR_MODE_MASK (XSPI_CR_CPHA | XSPI_CR_CPOL | \
- XSPI_CR_LSB_FIRST)
+ XSPI_CR_LSB_FIRST | XSPI_CR_LOOP)
#define XSPI_CR_TXFIFO_RESET 0x20
#define XSPI_CR_RXFIFO_RESET 0x40
#define XSPI_CR_MANUAL_SSELECT 0x80
@@ -197,6 +197,8 @@ static void xilinx_spi_chipselect(struct spi_device *spi, int is_on)
cr |= XSPI_CR_CPOL;
if (spi->mode & SPI_LSB_FIRST)
cr |= XSPI_CR_LSB_FIRST;
+ if (spi->mode & SPI_LOOP)
+ cr |= XSPI_CR_LOOP;
xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);
/* We do not check spi->max_speed_hz here as the SPI clock
@@ -356,7 +358,7 @@ static int xilinx_spi_probe(struct platform_device *pdev)
return -ENODEV;
/* the spi->mode bits understood by this driver: */
- master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_LOOP;
xspi = spi_master_get_devdata(master);
xspi->bitbang.master = master;
--
2.1.4
next prev parent reply other threads:[~2015-01-23 16:09 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-23 16:08 [PATCH 00/18] spi/xilinx: Speed-up Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 01/18] spi/xilinx: Support for spi mode LSB_FIRST Ricardo Ribalda Delgado
2015-01-26 19:23 ` Mark Brown
2015-01-23 16:08 ` Ricardo Ribalda Delgado [this message]
2015-01-26 19:23 ` [PATCH 02/18] spi/xilinx: Support for spi mode LOOP Mark Brown
2015-01-23 16:08 ` [PATCH 03/18] spi/xilinx: Simplify data read from the Rx FIFO Ricardo Ribalda Delgado
2015-01-27 17:25 ` Mark Brown
2015-01-23 16:08 ` [PATCH 04/18] spi-xilinx: Simplify spi_fill_tx_fifo Ricardo Ribalda Delgado
2015-01-26 23:54 ` Mark Brown
2015-01-23 16:08 ` [PATCH 05/18] spi/xilinx: Leave the IRQ always enabled Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 06/18] spi/xilinx: Code cleanup Ricardo Ribalda Delgado
2015-01-27 0:05 ` Mark Brown
2015-01-23 16:08 ` [PATCH 07/18] spi/xilinx: Use cached value of register Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 08/18] spi/xilinx: Support cores with no interrupt Ricardo Ribalda Delgado
2015-01-27 0:04 ` Mark Brown
2015-01-27 19:05 ` Ricardo Ribalda Delgado
2015-01-27 19:49 ` Mark Brown
2015-01-27 19:56 ` Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 09/18] spi/xilinx: Do not inhibit transmission in polling mode Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 10/18] spi/xilinx: Support for spi mode CS_HIGH Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 11/18] spi/xilinx: Remove rx_fn and tx_fn pointer Ricardo Ribalda Delgado
2015-01-27 0:09 ` Mark Brown
2015-01-27 10:00 ` Ricardo Ribalda Delgado
2015-01-27 15:42 ` Joe Perches
2015-01-27 19:07 ` Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 12/18] spi/xilinx: Make spi_tx and spi_rx simmetric Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 13/18] spi/xilinx: Convert remainding_bytes in remaining words Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 14/18] spi/xilinx: Convert bits_per_word in bytes_per_word Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 15/18] spi/xilinx: Remove iowrite/ioread wrappers Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 16/18] spi/xilinx: Reset core before buffer_size detection Ricardo Ribalda Delgado
2015-01-27 0:11 ` Mark Brown
2015-01-23 16:08 ` [PATCH 17/18] spi/xilinx: Remove remaining_words driver data variable Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 18/18] spi/xilinx: Check number of slaves range Ricardo Ribalda Delgado
2015-01-27 0:14 ` [PATCH 00/18] spi/xilinx: Speed-up Mark Brown
2015-01-27 10:17 ` Ricardo Ribalda Delgado
2015-01-27 11:59 ` Mark Brown
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