Hi,
On Thu, Jun 18, 2020 at 4:40 PM Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote:
>
> The definition of SPI_FULL_DUPLEX (3) is really SPI_TX_ONLY (1) ORed
> with SPI_RX_ONLY (2). Let's drop the define and simplify the code here a
> bit by collapsing the setting of 'm_cmd' into conditions that are the
> same.
>
> This is a non-functional change, just cleanup to consolidate code.
>
> Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
> ---
> drivers/spi/spi-geni-qcom.c | 13 ++++---------
> 1 file changed, 4 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
> index 636c3da15db0..670f83793aa4 100644
> --- a/drivers/spi/spi-geni-qcom.c
> +++ b/drivers/spi/spi-geni-qcom.c
> @@ -51,7 +51,6 @@
> /* M_CMD OP codes for SPI */
> #define SPI_TX_ONLY 1
> #define SPI_RX_ONLY 2
> -#define SPI_FULL_DUPLEX 3
> #define SPI_TX_RX 7
> #define SPI_CS_ASSERT 8
> #define SPI_CS_DEASSERT 9
> @@ -357,12 +356,6 @@ static void setup_fifo_xfer(struct spi_transfer *xfer,
>
> mas->tx_rem_bytes = 0;
> mas->rx_rem_bytes = 0;
> - if (xfer->tx_buf && xfer->rx_buf)
> - m_cmd = SPI_FULL_DUPLEX;
> - else if (xfer->tx_buf)
> - m_cmd = SPI_TX_ONLY;
> - else if (xfer->rx_buf)
> - m_cmd = SPI_RX_ONLY;
>
> spi_tx_cfg &= ~CS_TOGGLE;
>
> @@ -373,12 +366,14 @@ static void setup_fifo_xfer(struct spi_transfer *xfer,
> len &= TRANS_LEN_MSK;
>
> mas->cur_xfer = xfer;
> - if (m_cmd & SPI_TX_ONLY) {
> + if (xfer->tx_buf) {
> + m_cmd |= SPI_TX_ONLY;
> mas->tx_rem_bytes = xfer->len;
> writel(len, se->base + SE_SPI_TX_TRANS_LEN);
> }
>
> - if (m_cmd & SPI_RX_ONLY) {
> + if (xfer->rx_buf) {
> + m_cmd |= SPI_RX_ONLY;
If you're going to touch this, could you change "SPI_TX_ONLY" to
"SPI_TX_ENABLED" and "SPI_RX_ONLY" to 'SPI_RX_ENABLED". It felt
really weird to me that if you had full duplex you were setting
"RX_ONLY" and "TX_ONLY".
Other than that, your change is nice and cleans things up a bit, so
even if you don't do the extra cleanup:
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
-Doug
