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authorAxel Lin <axel.lin@ingics.com>2014-02-11 16:54:17 +0400
committerMark Brown <broonie@linaro.org>2014-02-11 21:02:31 +0400
commitc5c67e31bc1b96658169b5b553b9be42e2ca6368 (patch)
tree1f9fc1dc6bee8ffa964ee1729008db7df775674e /drivers/spi/spi-sc18is602.c
parent589f6a90e6c5cda51ecb89799c5bff4074e9ef77 (diff)
downloadlinux-c5c67e31bc1b96658169b5b553b9be42e2ca6368.tar.xz
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.c19
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;