Currently the master->setup() is called unconditionally.
The assumption is that every driver need to implement this
callback. This encourages drivers to populate empty functions
to prevent crashing.
This patch prevents the call of master->setup() if it is not
populated.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
int spi_setup(struct spi_device *spi)
{
unsigned bad_bits;
- int status;
+ int status = 0;
/* help drivers fail *cleanly* when they need options
* that aren't supported with their current master
if (!spi->bits_per_word)
spi->bits_per_word = 8;
- status = spi->master->setup(spi);
+ if (spi->master->setup)
+ status = spi->master->setup(spi);
dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s"
"%u bits/w, %u Hz max --> %d\n",