diff options
| author | Axel Lin <axel.lin@ingics.com> | 2014-02-11 20:54:17 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-02-11 17:02:31 +0000 |
| commit | c5c67e31bc1b96658169b5b553b9be42e2ca6368 (patch) | |
| tree | 1f9fc1dc6bee8ffa964ee1729008db7df775674e /drivers/spi/spi-sc18is602.c | |
| parent | 589f6a90e6c5cda51ecb89799c5bff4074e9ef77 (diff) | |
| download | linux-c5c67e31bc1b96658169b5b553b9be42e2ca6368.tar.bz2 | |
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>
Diffstat (limited to 'drivers/spi/spi-sc18is602.c')
| -rw-r--r-- | drivers/spi/spi-sc18is602.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/spi/spi-sc18is602.c b/drivers/spi/spi-sc18is602.c index b3ac776def9b..7fba10bba3b0 100644 --- a/drivers/spi/spi-sc18is602.c +++ b/drivers/spi/spi-sc18is602.c @@ -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; |