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>
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 @@
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;