Since, qspi controller uses quad read. Configuring the command register, if the transfer of data needs quad lines.
This patch has been done on top of the following patch[1], which is still under review/comments. This patch will also go changes, as the parent patch[1] does. [1]: http://comments.gmane.org/gmane.linux.kernel.spi.devel/14047 Signed-off-by: Sourav Poddar <sourav.pod...@ti.com> --- drivers/spi/spi-ti-qspi.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 430de9c..307cbed 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -258,8 +258,12 @@ static int qspi_read_msg(struct dra7xxx_qspi *qspi, struct spi_transfer *t) qspi->cmd | QSPI_RD_SNGL, qspi->dc); dra7xxx_writel(qspi, QSPI_WC_INT_EN, QSPI_INTR_ENABLE_SET_REG); dra7xxx_writel(qspi, qspi->dc, QSPI_SPI_DC_REG); - dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_SNGL, - QSPI_SPI_CMD_REG); + if (t->bitwidth == SPI_BITWIDTH_QUAD) + dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_QUAD, + QSPI_SPI_CMD_REG); + else + dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_SNGL, + QSPI_SPI_CMD_REG); wait_for_completion(&qspi->word_complete); *rxbuf++ = dra7xxx_readl_data(qspi, QSPI_SPI_DATA_REG, wlen); dev_dbg(qspi->dev, "rx done, read %02x\n", *(rxbuf-1)); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
