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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>
This commit is contained in:
Anatolij Gustschin 2011-06-01 18:36:49 +02:00 committed by Grant Likely
parent 8b20c8cb89
commit 8c99268431
1 changed files with 3 additions and 3 deletions
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6
drivers/spi/spi_bitbang.c
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@ -68,7 +68,7 @@ static unsigned bitbang_txrx_8(
unsigned ns, unsigned ns,
struct spi_transfer *t struct spi_transfer *t
) { ) {
unsigned bits = spi->bits_per_word; unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned count = t->len; unsigned count = t->len;
const u8 *tx = t->tx_buf; const u8 *tx = t->tx_buf;
u8 *rx = t->rx_buf; u8 *rx = t->rx_buf;
@ -94,7 +94,7 @@ static unsigned bitbang_txrx_16(
unsigned ns, unsigned ns,
struct spi_transfer *t struct spi_transfer *t
) { ) {
unsigned bits = spi->bits_per_word; unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned count = t->len; unsigned count = t->len;
const u16 *tx = t->tx_buf; const u16 *tx = t->tx_buf;
u16 *rx = t->rx_buf; u16 *rx = t->rx_buf;
@ -120,7 +120,7 @@ static unsigned bitbang_txrx_32(
unsigned ns, unsigned ns,
struct spi_transfer *t struct spi_transfer *t
) { ) {
unsigned bits = spi->bits_per_word; unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned count = t->len; unsigned count = t->len;
const u32 *tx = t->tx_buf; const u32 *tx = t->tx_buf;
u32 *rx = t->rx_buf; u32 *rx = t->rx_buf;