diff options
Diffstat (limited to 'drivers/spi/spi_bitbang.c')
| -rw-r--r-- | drivers/spi/spi_bitbang.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c index 88425e1af4d..0c85c984ccb 100644 --- a/drivers/spi/spi_bitbang.c +++ b/drivers/spi/spi_bitbang.c @@ -187,12 +187,10 @@ int spi_bitbang_setup(struct spi_device *spi) bitbang = spi_master_get_devdata(spi->master); - /* REVISIT: some systems will want to support devices using lsb-first - * bit encodings on the wire. In pure software that would be trivial, - * just bitbang_txrx_le_cphaX() routines shifting the other way, and - * some hardware controllers also have this support. + /* Bitbangers can support SPI_CS_HIGH, SPI_3WIRE, and so on; + * add those to master->flags, and provide the other support. */ - if ((spi->mode & SPI_LSB_FIRST) != 0) + if ((spi->mode & ~(SPI_CPOL|SPI_CPHA|bitbang->flags)) != 0) return -EINVAL; if (!cs) { |