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authorAnatolij Gustschin <agust@denx.de>2013-04-01 19:31:19 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-04-09 20:53:39 +0400
commitc3e2aa861005ec390e8a7556d1a1e980be1a6e1f (patch)
tree3e62ae3e82a1a97db9480c1f0889d2db599b8798 /drivers/spi
parent86e98743ec168b98eea3dfacc1e8b5ff442eb70d (diff)
downloadlinux-c3e2aa861005ec390e8a7556d1a1e980be1a6e1f.tar.xz
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')
-rw-r--r--drivers/spi/spi-mpc512x-psc.c10
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);