diff options
Diffstat (limited to 'drivers/spi/altera_spi.c')
| -rw-r--r-- | drivers/spi/altera_spi.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/spi/altera_spi.c b/drivers/spi/altera_spi.c index 373ce30a03..8e898b99c0 100644 --- a/drivers/spi/altera_spi.c +++ b/drivers/spi/altera_spi.c @@ -129,6 +129,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, uint bytes = bitlen / 8; const uchar *txp = dout; uchar *rxp = din; + uint32_t reg, start; debug("%s: bus:%i cs:%i bitlen:%i bytes:%i flags:%lx\n", __func__, slave->bus, slave->cs, bitlen, bytes, flags); @@ -154,8 +155,16 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, debug("%s: tx:%x ", __func__, d); writel(d, &altspi->regs->txdata); - while (!(readl(&altspi->regs->status) & ALTERA_SPI_STATUS_RRDY_MSK)) - ; + start = get_timer(0); + while (1) { + reg = readl(&altspi->regs->status); + if (reg & ALTERA_SPI_STATUS_RRDY_MSK) + break; + if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) { + printf("%s: Transmission timed out!\n", __func__); + goto done; + } + } d = readl(&altspi->regs->rxdata); if (rxp) |
