Without this change the DM/DTS version of mxs_spi driver doesn't reset the SPI IP block in probe. As a result this driver (when used solely on U-Boot proper) relies on reset performed by mxs spi driver in SPL.
In the use case where eMMC is used in SPL as a boot primary device, the mxs_reset_block() is not called at all and DM/DTS aware SPI driver in U-Boot proper is malfunctioning.
Signed-off-by: Lukasz Majewski lukma@denx.de ---
drivers/spi/mxs_spi.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c index 3a9756fbf1..b79a72db2b 100644 --- a/drivers/spi/mxs_spi.c +++ b/drivers/spi/mxs_spi.c @@ -436,6 +436,8 @@ static int mxs_spi_probe(struct udevice *bus) priv->dma_channel = plat->dma_id; priv->clk_id = plat->clk_id;
+ mxs_reset_block(&priv->regs->hw_ssp_ctrl0_reg); + ret = mxs_dma_init_channel(priv->dma_channel); if (ret) { printf("%s: DMA init channel error %d\n", __func__, ret);