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fpga: microchip-spi: separate data frame write routine

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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@metrotek.ru>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20221230092922.18822-4-i.bornyakov@metrotek.ru
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
This commit is contained in:
Ivan Bornyakov 2022-12-30 12:29:22 +03:00 committed by Xu Yilun
parent 88e705697e
commit 9d94ec9857
No known key found for this signature in database
GPG Key ID: FCB70381A4A08CDA
1 changed files with 23 additions and 13 deletions
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36
drivers/fpga/microchip-spi.c
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@ -280,9 +280,30 @@ 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;
@ -293,19 +314,8 @@ 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);