MLK-16186: spi: flexspi: reset the flexspi DLL register to default value

i.MX8QM ROM didn't calculate the DLL correctly in some cases, to avoid
the wrong DLL setting impact the following functions, reset them to the
default value when probe.

Signed-off-by: Han Xu <han.xu@nxp.com>

diff --git a/drivers/spi/fsl_fspi.c b/drivers/spi/fsl_fspi.c
index 19bb68e..b7b2d92 100644 (file)
--- a/drivers/spi/fsl_fspi.c
+++ b/drivers/spi/fsl_fspi.c
@@ -1186,6 +1186,10 @@ static int fsl_fspi_probe(struct udevice *bus)
        fspi_write32(priv->flags, &priv->regs->mcr0,
                     0xFFFF0000);
 
+       /* Reset the DLL register to default value */
+       fspi_write32(priv->flags, &priv->regs->dllacr, 0x0100);
+       fspi_write32(priv->flags, &priv->regs->dllbcr, 0x0100);
+
        /* Flash Size in KByte */
        total_size = FSL_FSPI_FLASH_SIZE * FSL_FSPI_FLASH_NUM >> 10;