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spi: sc18is602: Move checking chip_select for SC18IS602 to sc18is602_setup 

So it will be checked when spi device is added onto the spi bus.
spi_add_device() calls spi_setup() which then calls spi->master->setup().
No need to check it every time sc18is602_transfer_one() is called.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2014-02-11 20:54:17 +08:00 committed by Mark Brown
parent 589f6a90e6
commit c5c67e31bc
1 changed files with 12 additions and 7 deletions
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19
drivers/spi/spi-sc18is602.c
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@ -205,12 +205,6 @@ static int sc18is602_transfer_one(struct spi_master *master,
struct spi_transfer *t;
int status = 0;
/* SC18IS602 does not support CS2 */
if (hw->id == sc18is602 && spi->chip_select == 2) {
status = -ENXIO;
goto error;
}
hw->tlen = 0;
list_for_each_entry(t, &m->transfers, transfer_list) {
u32 hz = t->speed_hz ? : spi->max_speed_hz;
@ -238,13 +232,23 @@ static int sc18is602_transfer_one(struct spi_master *master,
if (t->delay_usecs)
udelay(t->delay_usecs);
}
error:
m->status = status;
spi_finalize_current_message(master);
return status;
}
static int sc18is602_setup(struct spi_device *spi)
{
struct sc18is602 *hw = spi_master_get_devdata(spi->master);
/* SC18IS602 does not support CS2 */
if (hw->id == sc18is602 && spi->chip_select == 2)
return -ENXIO;
return 0;
}
static int sc18is602_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -298,6 +302,7 @@ static int sc18is602_probe(struct i2c_client *client,
master->bus_num = client->adapter->nr;
master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_LSB_FIRST;
master->bits_per_word_mask = SPI_BPW_MASK(8);
master->setup = sc18is602_setup;
master->transfer_one_message = sc18is602_transfer_one;
master->dev.of_node = np;