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spi: topcliff-pch: Convert to use master->max_speed_hz 

Set "master->max_speed_hz = PCH_MAX_BAUDRATE" then we can remove pch_spi_setup.
In additional, pspi->max_speed_hz will never be 0 because it's default value
will be set to master->max_speed_hz.

Also remove list_empty checking in pch_spi_transfer() because the checking is
done by spi core.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2014-02-10 22:26:40 +08:00 committed by Mark Brown
parent 38dbfb59d1
commit fe3a1ad0c6
1 changed files with 1 additions and 36 deletions
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37
drivers/spi/spi-topcliff-pch.c
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@ -464,20 +464,6 @@ static void pch_spi_reset(struct spi_master *master)
pch_spi_writereg(master, PCH_SRST, 0x0);
}
static int pch_spi_setup(struct spi_device *pspi)
{
/* Check baud rate setting */
/* if baud rate of chip is greater than
max we can support,return error */
if ((pspi->max_speed_hz) > PCH_MAX_BAUDRATE)
pspi->max_speed_hz = PCH_MAX_BAUDRATE;
dev_dbg(&pspi->dev, "%s MODE = %x\n", __func__,
(pspi->mode) & (SPI_CPOL | SPI_CPHA));
return 0;
}
static int pch_spi_transfer(struct spi_device *pspi, struct spi_message *pmsg)
{
@ -486,23 +472,6 @@ static int pch_spi_transfer(struct spi_device *pspi, struct spi_message *pmsg)
int retval;
unsigned long flags;
/* validate spi message and baud rate */
if (unlikely(list_empty(&pmsg->transfers) == 1)) {
dev_err(&pspi->dev, "%s list empty\n", __func__);
retval = -EINVAL;
goto err_out;
}
if (unlikely(pspi->max_speed_hz == 0)) {
dev_err(&pspi->dev, "%s pch_spi_transfer maxspeed=%d\n",
__func__, pspi->max_speed_hz);
retval = -EINVAL;
goto err_out;
}
dev_dbg(&pspi->dev,
"%s Transfer List not empty. Transfer Speed is set.\n", __func__);
spin_lock_irqsave(&data->lock, flags);
/* validate Tx/Rx buffers and Transfer length */
list_for_each_entry(transfer, &pmsg->transfers, transfer_list) {
@ -523,10 +492,6 @@ static int pch_spi_transfer(struct spi_device *pspi, struct spi_message *pmsg)
dev_dbg(&pspi->dev,
"%s Tx/Rx buffer valid. Transfer length valid\n",
__func__);
/* if baud rate has been specified validate the same */
if (transfer->speed_hz > PCH_MAX_BAUDRATE)
transfer->speed_hz = PCH_MAX_BAUDRATE;
}
spin_unlock_irqrestore(&data->lock, flags);
@ -1418,10 +1383,10 @@ static int pch_spi_pd_probe(struct platform_device *plat_dev)
/* initialize members of SPI master */
master->num_chipselect = PCH_MAX_CS;
master->setup = pch_spi_setup;
master->transfer = pch_spi_transfer;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
master->max_speed_hz = PCH_MAX_BAUDRATE;
data->board_dat = board_dat;
data->plat_dev = plat_dev;