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spi: qup: call io_config in mode specific function 

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>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Varadarajan Narayanan 2017-07-28 12:22:56 +05:30 committed by Mark Brown
parent 94b9149feb
commit 3b5ea2c981
1 changed files with 17 additions and 9 deletions
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26
drivers/spi/spi-qup.c
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@ -156,6 +156,8 @@ 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);
@ -417,11 +419,12 @@ 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_qup *qup = spi_master_get_devdata(master);
dma_async_tx_callback rx_done = NULL, tx_done = NULL;
struct spi_master *master = spi->master;
struct spi_qup *qup = spi_master_get_devdata(master);
int ret;
if (xfer->rx_buf)
@ -429,6 +432,10 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
else if (xfer->tx_buf)
tx_done = spi_qup_dma_done;
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) {
@ -459,12 +466,17 @@ 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");
@ -742,10 +754,6 @@ 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);
@ -760,9 +768,9 @@ static int spi_qup_transfer_one(struct spi_master *master,
spin_unlock_irqrestore(&controller->lock, flags);
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;