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| author | Sourav Poddar <sourav.poddar@ti.com> | 2013-08-23 15:12:16 +0530 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-08-23 12:00:32 +0100 |
| commit | 70e2e9761a580cc9ef84be69dac2279dd6c2c72f (patch) | |
| tree | af6ca218d41be245a1c7263a648764ecbfe1eb22 /drivers/spi | |
| parent | 21e34a3306e7f0399cc0e10c24cb0e7790dfbcac (diff) | |
| download | op-kernel-dev-70e2e9761a580cc9ef84be69dac2279dd6c2c72f.zip op-kernel-dev-70e2e9761a580cc9ef84be69dac2279dd6c2c72f.tar.gz | |
spi/qspi: Add dual/quad spi read support
Support for multiple lines in SPI framework has been picked[1].
[1]: http://comments.gmane.org/gmane.linux.kernel.spi.devel/14420
Hence, adapting ti qspi driver to support multiple data lines for read.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-ti-qspi.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 09e2415..c07e041 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -267,7 +267,18 @@ static int qspi_read_msg(struct ti_qspi *qspi, struct spi_transfer *t) u8 *rxbuf; rxbuf = t->rx_buf; - cmd = qspi->cmd | QSPI_RD_SNGL; + cmd = qspi->cmd; + switch (t->rx_nbits) { + case SPI_NBITS_DUAL: + cmd |= QSPI_RD_DUAL; + break; + case SPI_NBITS_QUAD: + cmd |= QSPI_RD_QUAD; + break; + default: + cmd |= QSPI_RD_SNGL; + break; + } count = t->len; wlen = t->bits_per_word; |
