diff options
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 3a6083b386a1..4fffb1f39def 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1080,7 +1080,8 @@ static int of_spi_register_master(struct spi_master *master) if (!master->cs_gpios) return -ENOMEM; - memset(cs, -EINVAL, master->num_chipselect); + for (i = 0; i < master->num_chipselect; i++) + cs[i] = -EINVAL; for (i = 0; i < nb; i++) cs[i] = of_get_named_gpio(np, "cs-gpios", i); @@ -1135,6 +1136,9 @@ int spi_register_master(struct spi_master *master) if (master->num_chipselect == 0) return -EINVAL; + if ((master->bus_num < 0) && master->dev.of_node) + master->bus_num = of_alias_get_id(master->dev.of_node, "spi"); + /* convention: dynamically assigned bus IDs count down from the max */ if (master->bus_num < 0) { /* FIXME switch to an IDR based scheme, something like @@ -1366,12 +1370,14 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) } /** - * Set transfer bits_per_word as spi device default if it is not - * set for this transfer. + * Set transfer bits_per_word and max speed as spi device default if + * it is not set for this transfer. */ list_for_each_entry(xfer, &message->transfers, transfer_list) { if (!xfer->bits_per_word) xfer->bits_per_word = spi->bits_per_word; + if (!xfer->speed_hz) + xfer->speed_hz = spi->max_speed_hz; } message->spi = spi; @@ -1656,7 +1662,8 @@ int spi_write_then_read(struct spi_device *spi, * using the pre-allocated buffer or the transfer is too large. */ if ((n_tx + n_rx) > SPI_BUFSIZ || !mutex_trylock(&lock)) { - local_buf = kmalloc(max((unsigned)SPI_BUFSIZ, n_tx + n_rx), GFP_KERNEL); + local_buf = kmalloc(max((unsigned)SPI_BUFSIZ, n_tx + n_rx), + GFP_KERNEL | GFP_DMA); if (!local_buf) return -ENOMEM; } else { |