mpf_ops_write() function writes bitstream data to the FPGA by a smaller
frames. Introduce mpf_spi_frame_write() function which is for writing a
single data frame and use it in mpf_ops_write().
No functional changes intended.
Signed-off-by: Ivan Bornyakov <i.bornyakov@xxxxxxxxxxx>
---
drivers/fpga/microchip-spi.c | 36 +++++++++++++++++++++++-------------
1 file changed, 23 insertions(+), 13 deletions(-)
diff --git a/drivers/fpga/microchip-spi.c b/drivers/fpga/microchip-spi.c
index f3ddfab87499..f8a6872c865b 100644
--- a/drivers/fpga/microchip-spi.c
+++ b/drivers/fpga/microchip-spi.c
@@ -275,9 +275,30 @@ static int mpf_ops_write_init(struct fpga_manager *mgr,
return 0;
}
+static int mpf_spi_frame_write(struct mpf_priv *priv, const char *buf)
+{
+ struct spi_transfer xfers[2] = {
+ {
+ .tx_buf = &priv->tx,
+ .len = 1,
+ }, {
+ .tx_buf = buf,
+ .len = MPF_SPI_FRAME_SIZE,
+ },
+ };
+ int ret;
+
+ ret = mpf_poll_status(priv, 0);
+ if (ret < 0)
+ return ret;
+
+ priv->tx = MPF_SPI_FRAME;
+
+ return spi_sync_transfer(priv->spi, xfers, ARRAY_SIZE(xfers));
+}
+
static int mpf_ops_write(struct fpga_manager *mgr, const char *buf, size_t count)
{
- struct spi_transfer xfers[2] = { 0 };
struct mpf_priv *priv = mgr->priv;
struct device *dev = &mgr->dev;
int ret, i;
@@ -288,19 +309,8 @@ static int mpf_ops_write(struct fpga_manager *mgr, const char *buf, size_t count
return -EINVAL;
}
- xfers[0].tx_buf = &priv->tx;
- xfers[0].len = 1;
-
for (i = 0; i < count / MPF_SPI_FRAME_SIZE; i++) {
- xfers[1].tx_buf = buf + i * MPF_SPI_FRAME_SIZE;
- xfers[1].len = MPF_SPI_FRAME_SIZE;
-
- ret = mpf_poll_status(priv, 0);
- if (ret >= 0) {
- priv->tx = MPF_SPI_FRAME;
- ret = spi_sync_transfer(priv->spi, xfers, ARRAY_SIZE(xfers));
- }
-
+ ret = mpf_spi_frame_write(priv, buf + i * MPF_SPI_FRAME_SIZE);
if (ret) {
dev_err(dev, "Failed to write bitstream frame %d/%zu\n",
i, count / MPF_SPI_FRAME_SIZE);
--
2.38.2
