diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.14/501-spi-a3700-Change-SPI-mode-before-asserting-chip-sele.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.14/501-spi-a3700-Change-SPI-mode-before-asserting-chip-sele.patch | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/target/linux/mvebu/patches-4.14/501-spi-a3700-Change-SPI-mode-before-asserting-chip-sele.patch b/target/linux/mvebu/patches-4.14/501-spi-a3700-Change-SPI-mode-before-asserting-chip-sele.patch deleted file mode 100644 index 3ac7091188..0000000000 --- a/target/linux/mvebu/patches-4.14/501-spi-a3700-Change-SPI-mode-before-asserting-chip-sele.patch +++ /dev/null @@ -1,70 +0,0 @@ -From dd7aa8d4b53b3484ba31ba56f3ff1be7deb38530 Mon Sep 17 00:00:00 2001 -From: Maxime Chevallier <maxime.chevallier@smile.fr> -Date: Tue, 10 Oct 2017 10:43:18 +0200 -Subject: spi: a3700: Change SPI mode before asserting chip-select - -The spi device mode should be configured in the controller before the -chip-select is asserted, so that a clock polarity configuration change -is not interpreted as a clock tick by the device. - -This patch moves the mode setting to the 'prepare_message' function -instead of the 'transfer_one' function. - -By doing so, this patch also removes redundant code in -a3700_spi_clock_set. - -This was tested on EspressoBin board, with spidev. - -Signed-off-by: Maxime Chevallier <maxime.chevallier@smile.fr> -Signed-off-by: Mark Brown <broonie@kernel.org> ---- - drivers/spi/spi-armada-3700.c | 17 ++++------------- - 1 file changed, 4 insertions(+), 13 deletions(-) - ---- a/drivers/spi/spi-armada-3700.c -+++ b/drivers/spi/spi-armada-3700.c -@@ -214,7 +214,7 @@ static void a3700_spi_mode_set(struct a3 - } - - static void a3700_spi_clock_set(struct a3700_spi *a3700_spi, -- unsigned int speed_hz, u16 mode) -+ unsigned int speed_hz) - { - u32 val; - u32 prescale; -@@ -239,17 +239,6 @@ static void a3700_spi_clock_set(struct a - val |= A3700_SPI_CLK_CAPT_EDGE; - spireg_write(a3700_spi, A3700_SPI_IF_TIME_REG, val); - } -- -- val = spireg_read(a3700_spi, A3700_SPI_IF_CFG_REG); -- val &= ~(A3700_SPI_CLK_POL | A3700_SPI_CLK_PHA); -- -- if (mode & SPI_CPOL) -- val |= A3700_SPI_CLK_POL; -- -- if (mode & SPI_CPHA) -- val |= A3700_SPI_CLK_PHA; -- -- spireg_write(a3700_spi, A3700_SPI_IF_CFG_REG, val); - } - - static void a3700_spi_bytelen_set(struct a3700_spi *a3700_spi, unsigned int len) -@@ -431,7 +420,7 @@ static void a3700_spi_transfer_setup(str - - a3700_spi = spi_master_get_devdata(spi->master); - -- a3700_spi_clock_set(a3700_spi, xfer->speed_hz, spi->mode); -+ a3700_spi_clock_set(a3700_spi, xfer->speed_hz); - - byte_len = xfer->bits_per_word >> 3; - -@@ -592,6 +581,8 @@ static int a3700_spi_prepare_message(str - - a3700_spi_bytelen_set(a3700_spi, 4); - -+ a3700_spi_mode_set(a3700_spi, spi->mode); -+ - return 0; - } - |