spi/bitbang: initialize bits_per_word as specified by spi message
SPI protocol drivers can submit messages specifying needed bits_per_word
parameter for a message transfer. The bitbang driver currently ignores
bits_per_word given by a singe message and always uses master's
bits_per_word parameter. Only use master's bits_per_word when a
message didn't specify needed bits_per_word for ongoing transfer.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index 14a63f6..bb38c83 100644
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -68,7 +68,7 @@
unsigned ns,
struct spi_transfer *t
) {
- unsigned bits = spi->bits_per_word;
+ unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned count = t->len;
const u8 *tx = t->tx_buf;
u8 *rx = t->rx_buf;
@@ -94,7 +94,7 @@
unsigned ns,
struct spi_transfer *t
) {
- unsigned bits = spi->bits_per_word;
+ unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned count = t->len;
const u16 *tx = t->tx_buf;
u16 *rx = t->rx_buf;
@@ -120,7 +120,7 @@
unsigned ns,
struct spi_transfer *t
) {
- unsigned bits = spi->bits_per_word;
+ unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned count = t->len;
const u32 *tx = t->tx_buf;
u32 *rx = t->rx_buf;