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| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2011-11-24 15:32:39 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-11-25 12:41:18 +0100 |
| commit | 5da11da840283cc41b5ee71636e7173f8c062e5a (patch) | |
| tree | 031ff3ce7554ba3ca83fd4e7a21c14d3b629b1b7 /drivers/spi/atmel_spi.c | |
| parent | 739f9105cceb0321026d58b36732756edb67d0c7 (diff) | |
| download | barebox-5da11da840283cc41b5ee71636e7173f8c062e5a.tar.gz barebox-5da11da840283cc41b5ee71636e7173f8c062e5a.tar.xz | |
atmel_spi: add mesg->actual_length, so devices can use it for read/write
Without this i.e. the m25p driver is not working properly.
Its used to calculate the return value of the read/write function of
some devices. If the value is missing, barebox would always
miscalculate the next transfer sizes.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/spi/atmel_spi.c')
| -rw-r--r-- | drivers/spi/atmel_spi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index faa03b1c9e..47e6756731 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -190,6 +190,7 @@ static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *mesg) struct spi_transfer *t = NULL; unsigned int bits = spi->bits_per_word; + mesg->actual_length = 0; ret = master->setup(spi); if (ret < 0) { dev_dbg(master->dev, "transfer: master setup failed\n"); @@ -210,6 +211,7 @@ static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *mesg) u32 tx_val; int i = 0, rx_val; + mesg->actual_length += t->len; if (bits <= 8) { const u8 *txbuf = t->tx_buf; u8 *rxbuf = t->rx_buf; |