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Commit c3e2aa86 authored by Anatolij Gustschin's avatar Anatolij Gustschin Committed by Mark Brown
Browse files

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: default avatarAnatolij Gustschin <agust@denx.de>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 86e98743

drivers/spi/spi-mpc512x-psc.c

+3 −7
Original line number Diff line number Diff line
@@ -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);