diff options
Diffstat (limited to 'drivers/spi/spi_bfin5xx.c')
| -rw-r--r-- | drivers/spi/spi_bfin5xx.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index ab483a0ec6d..3f223511127 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -504,6 +504,15 @@ static irqreturn_t bfin_spi_dma_irq_handler(int irq, void *dev_id) "in dma_irq_handler dmastat:0x%x spistat:0x%x\n", dmastat, spistat); + if (drv_data->rx != NULL) { + u16 cr = read_CTRL(drv_data); + /* discard old RX data and clear RXS */ + bfin_spi_dummy_read(drv_data); + write_CTRL(drv_data, cr & ~BIT_CTL_ENABLE); /* Disable SPI */ + write_CTRL(drv_data, cr & ~BIT_CTL_TIMOD); /* Restore State */ + write_STAT(drv_data, BIT_STAT_CLR); /* Clear Status */ + } + clear_dma_irqstat(drv_data->dma_channel); /* @@ -1099,12 +1108,15 @@ static int bfin_spi_setup(struct spi_device *spi) } if (chip->chip_select_num >= MAX_CTRL_CS) { - ret = gpio_request(chip->cs_gpio, spi->modalias); - if (ret) { - dev_err(&spi->dev, "gpio_request() error\n"); - goto pin_error; + /* Only request on first setup */ + if (spi_get_ctldata(spi) == NULL) { + ret = gpio_request(chip->cs_gpio, spi->modalias); + if (ret) { + dev_err(&spi->dev, "gpio_request() error\n"); + goto pin_error; + } + gpio_direction_output(chip->cs_gpio, 1); } - gpio_direction_output(chip->cs_gpio, 1); } dev_dbg(&spi->dev, "setup spi chip %s, width is %d, dma is %d\n", |