[PATCH v4 10/14] spi: qup: call io_config in mode specific function

Varadarajan Narayanan
2017-06-27T09:47:02Z

DMA transactions should only only need to call io_config only once, but
block mode might call it several times to setup several transactions so
it can handle reads/writes larger than the max size per transaction, so
we move the call to the do_ functions.

This is just refactoring, there should be no functional change

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
drivers/spi/spi-qup.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index bfb6d27..37b51e3 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -158,6 +158,8 @@ struct spi_qup {
struct dma_slave_config tx_conf;
};

+static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer);
+
static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag)
{
u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL);
@@ -416,12 +418,17 @@ static void spi_qup_dma_terminate(struct spi_master *master,
dmaengine_terminate_all(master->dma_rx);
}

-static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
+static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
unsigned long timeout)
{
+ struct spi_master *master = spi->master;
struct spi_qup *qup = spi_master_get_devdata(master);
int ret;

+ ret = spi_qup_io_config(spi, xfer);
+ if (ret)
+ return ret;
+
/* before issuing the descriptors, set the QUP to run */
ret = spi_qup_set_state(qup, QUP_STATE_RUN);
if (ret) {
@@ -457,12 +464,17 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
return 0;
}

-static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
+static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
unsigned long timeout)
{
+ struct spi_master *master = spi->master;
struct spi_qup *qup = spi_master_get_devdata(master);
int ret;

+ ret = spi_qup_io_config(spi, xfer);
+ if (ret)
+ return ret;
+
ret = spi_qup_set_state(qup, QUP_STATE_RUN);
if (ret) {
dev_warn(qup->dev, "cannot set RUN state\n");
@@ -743,18 +755,14 @@ static int spi_qup_transfer_one(struct spi_master *master,
if (ret)
return ret;

- ret = spi_qup_io_config(spi, xfer);
- if (ret)
- return ret;
-
timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
timeout = 100 * msecs_to_jiffies(timeout);

if (spi_qup_is_dma_xfer(controller->mode))
- ret = spi_qup_do_dma(master, xfer, timeout);
+ ret = spi_qup_do_dma(spi, xfer, timeout);
else
- ret = spi_qup_do_pio(master, xfer, timeout);
+ ret = spi_qup_do_pio(spi, xfer, timeout);

if (ret)
goto exit;