diff options
| author | Anatolij Gustschin <agust@denx.de> | 2013-04-01 17:31:19 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-04-09 18:53:39 +0200 |
| commit | c3e2aa861005ec390e8a7556d1a1e980be1a6e1f (patch) | |
| tree | 3e62ae3e82a1a97db9480c1f0889d2db599b8798 /drivers/spi/spi-mpc512x-psc.c | |
| parent | spi: spi-mpc512x-psc: add support for gpio chip selects (diff) | |
| download | linux-c3e2aa861005ec390e8a7556d1a1e980be1a6e1f.tar.xz linux-c3e2aa861005ec390e8a7556d1a1e980be1a6e1f.zip | |
spi: spi-mpc512x-psc: let transmiter/receiver enabled when in xfer loop
There is no need to disable transmitter/receiver after each loop
iteration and re-enable it for next loop iteration. Enable the
transmitter/receiver before xfer loop starts and disable it when
the whole transfer is done.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/spi/spi-mpc512x-psc.c')
| -rw-r--r-- | drivers/spi/spi-mpc512x-psc.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c index da60f268f74c..dfddf336912d 100644 --- a/drivers/spi/spi-mpc512x-psc.c +++ b/drivers/spi/spi-mpc512x-psc.c @@ -149,6 +149,9 @@ static int mpc512x_psc_spi_transfer_rxtx(struct spi_device *spi, in_8(&psc->mode); out_8(&psc->mode, 0x0); + /* enable transmiter/receiver */ + out_8(&psc->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE); + while (len) { int count; int i; @@ -177,10 +180,6 @@ static int mpc512x_psc_spi_transfer_rxtx(struct spi_device *spi, out_be32(&fifo->txisr, MPC512x_PSC_FIFO_EMPTY); out_be32(&fifo->tximr, MPC512x_PSC_FIFO_EMPTY); - /* enable transmiter/receiver */ - out_8(&psc->command, - MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE); - wait_for_completion(&mps->done); mdelay(1); @@ -205,9 +204,6 @@ static int mpc512x_psc_spi_transfer_rxtx(struct spi_device *spi, while (in_be32(&fifo->rxcnt)) { in_8(&fifo->rxdata_8); } - - out_8(&psc->command, - MPC52xx_PSC_TX_DISABLE | MPC52xx_PSC_RX_DISABLE); } /* disable transmiter/receiver and fifo interrupt */ out_8(&psc->command, MPC52xx_PSC_TX_DISABLE | MPC52xx_PSC_RX_DISABLE); |