diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/spi.h | 3 | ||||
| -rw-r--r-- | src/southbridge/intel/bd82x6x/spi.c | 6 |
2 files changed, 8 insertions, 1 deletions
diff --git a/src/include/spi.h b/src/include/spi.h index bee851ea97..7d195d002a 100644 --- a/src/include/spi.h +++ b/src/include/spi.h @@ -44,6 +44,9 @@ #define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */ #define SPI_XFER_END 0x02 /* Deassert CS after transfer */ +/* SPI opcodes */ +#define SPI_OPCODE_WREN 0x06 + /*----------------------------------------------------------------------- * Representation of a SPI slave, i.e. what we're communicating with. * diff --git a/src/southbridge/intel/bd82x6x/spi.c b/src/southbridge/intel/bd82x6x/spi.c index 5903fd8cf4..2e88932c0b 100644 --- a/src/southbridge/intel/bd82x6x/spi.c +++ b/src/southbridge/intel/bd82x6x/spi.c @@ -505,6 +505,10 @@ static int spi_setup_opcode(spi_transaction *trans) uint8_t optype; uint16_t opcode_index; + /* Write Enable is handled as atomic prefix */ + if (trans->opcode == SPI_OPCODE_WREN) + return 0; + read_reg(cntlr.opmenu, opmenu, sizeof(opmenu)); for (opcode_index = 0; opcode_index < cntlr.menubytes; opcode_index++) { @@ -623,7 +627,7 @@ int spi_xfer(struct spi_slave *slave, const void *dout, if ((with_address = spi_setup_offset(&trans)) < 0) return -1; - if (!ichspi_lock && trans.opcode == 0x06) { + if (!ichspi_lock && trans.opcode == SPI_OPCODE_WREN) { /* * Treat Write Enable as Atomic Pre-Op if possible * in order to prevent the Management Engine from |