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spi: dw: remove bits_per_word member of struct chip_data

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There is no need to carry over spi->bits_per_word and Co from ->setup() in
struct chip_data since ->transfer_one() will anyway take the transfer
parameters from struct spi_transfer. This is since SPI core validates both
bits_per_word transfer parameter and defaults to spi->bits_per_word in case
that per transfer parameter is not set.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko 2015-10-14 23:12:20 +03:00 committed by Mark Brown
parent 4adb1f8f88
commit 863cb2f72e
1 changed files with 2 additions and 14 deletions
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16
drivers/spi/spi-dw.c
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@ -31,17 +31,14 @@
/* Slave spi_dev related */
struct chip_data {
u8 cs; /* chip select pin */
u8 n_bytes; /* current is a 1/2/4 byte op */
u8 tmode; /* TR/TO/RO/EEPROM */
u8 type; /* SPI/SSP/MicroWire */
u8 poll_mode; /* 1 means use poll mode */
u32 dma_width;
u32 rx_threshold;
u32 tx_threshold;
u8 enable_dma;
u8 bits_per_word;
u16 clk_div; /* baud rate divider */
u32 speed_hz; /* baud rate */
void (*cs_control)(u32 command);
@ -294,8 +291,6 @@ static int dw_spi_transfer_one(struct spi_master *master,
int ret;
dws->dma_mapped = 0;
dws->n_bytes = chip->n_bytes;
dws->dma_width = chip->dma_width;
dws->tx = (void *)transfer->tx_buf;
dws->tx_end = dws->tx + transfer->len;
@ -324,6 +319,8 @@ static int dw_spi_transfer_one(struct spi_master *master,
} else if (transfer->bits_per_word == 16) {
dws->n_bytes = 2;
dws->dma_width = 2;
} else {
return -EINVAL;
}
/* Default SPI mode is SCPOL = 0, SCPH = 0 */
cr0 = (transfer->bits_per_word - 1)
@ -437,15 +434,6 @@ static int dw_spi_setup(struct spi_device *spi)
chip->tx_threshold = 0;
}
if (spi->bits_per_word == 8) {
chip->n_bytes = 1;
chip->dma_width = 1;
} else if (spi->bits_per_word == 16) {
chip->n_bytes = 2;
chip->dma_width = 2;
}
chip->bits_per_word = spi->bits_per_word;
chip->tmode = 0; /* Tx & Rx */
if (gpio_is_valid(spi->cs_gpio)) {