diff options
| -rw-r--r-- | drivers/spi/mxs_spi.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c index 3cf7142..2b9f395 100644 --- a/drivers/spi/mxs_spi.c +++ b/drivers/spi/mxs_spi.c @@ -56,8 +56,6 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, unsigned int max_hz, unsigned int mode) { struct mxs_spi_slave *mxs_slave; - struct mxs_ssp_regs *ssp_regs; - int reg; if (!spi_cs_is_valid(bus, cs)) { printf("mxs_spi: invalid bus %d / chip select %d\n", bus, cs); @@ -74,13 +72,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, mxs_slave->max_khz = max_hz / 1000; mxs_slave->mode = mode; mxs_slave->regs = mxs_ssp_regs_by_bus(bus); - ssp_regs = mxs_slave->regs; - reg = readl(&ssp_regs->hw_ssp_ctrl0); - reg &= ~(MXS_SSP_CHIPSELECT_MASK); - reg |= cs << MXS_SSP_CHIPSELECT_SHIFT; - - writel(reg, &ssp_regs->hw_ssp_ctrl0); return &mxs_slave->slave; err_init: @@ -102,7 +94,9 @@ int spi_claim_bus(struct spi_slave *slave) mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg); - writel(SSP_CTRL0_BUS_WIDTH_ONE_BIT, &ssp_regs->hw_ssp_ctrl0); + writel((slave->cs << MXS_SSP_CHIPSELECT_SHIFT) | + SSP_CTRL0_BUS_WIDTH_ONE_BIT, + &ssp_regs->hw_ssp_ctrl0); reg = SSP_CTRL1_SSP_MODE_SPI | SSP_CTRL1_WORD_LENGTH_EIGHT_BITS; reg |= (mxs_slave->mode & SPI_CPOL) ? SSP_CTRL1_POLARITY : 0; |