diff options
| -rw-r--r-- | drivers/spi/spi_imx.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c index 89c22efedfb0..1b17f443dee7 100644 --- a/drivers/spi/spi_imx.c +++ b/drivers/spi/spi_imx.c @@ -44,6 +44,9 @@ #define MXC_CSPIINT 0x0c #define MXC_RESET 0x1c +#define MX3_CSPISTAT 0x14 +#define MX3_CSPISTAT_RR (1 << 3) + /* generic defines to abstract from the different register layouts */ #define MXC_INT_RR (1 << 0) /* Receive data ready interrupt */ #define MXC_INT_TE (1 << 1) /* Transmit FIFO empty interrupt */ @@ -593,6 +596,11 @@ static int __init spi_imx_probe(struct platform_device *pdev) if (!cpu_is_mx31() || !cpu_is_mx35()) writel(1, spi_imx->base + MXC_RESET); + /* drain receive buffer */ + if (cpu_is_mx31() || cpu_is_mx35()) + while (readl(spi_imx->base + MX3_CSPISTAT) & MX3_CSPISTAT_RR) + readl(spi_imx->base + MXC_CSPIRXDATA); + spi_imx->intctrl(spi_imx, 0); ret = spi_bitbang_start(&spi_imx->bitbang); |