Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>
- if (cs > 3 || !spi_cs_is_valid(bus, cs))
+ if (!spi_cs_is_valid(bus, cs))
return NULL;
switch (bus) {
return NULL;
switch (bus) {
* somewhat quirky, and it doesn't really buy us much anyway
* in the context of U-Boot.
*/
* somewhat quirky, and it doesn't really buy us much anyway
* in the context of U-Boot.
*/
- if (flags & SPI_XFER_BEGIN)
+ if (flags & SPI_XFER_BEGIN) {
+ /*
+ * sometimes the RDR is not empty when we get here,
+ * in theory that should not happen, but it DOES happen.
+ * Read it here to be on the safe side.
+ * That also clears the OVRES flag. Required if the
+ * following loop exits due to OVRES!
+ */
+ spi_readl(as, RDR);
+ }
for (len_tx = 0, len_rx = 0; len_rx < len; ) {
status = spi_readl(as, SR);
for (len_tx = 0, len_rx = 0; len_rx < len; ) {
status = spi_readl(as, SR);