diff options
| author | T Karthik Reddy <t.karthik.reddy@xilinx.com> | 2022-07-15 19:31:17 +0530 |
|---|---|---|
| committer | Michal Simek <michal.simek@amd.com> | 2022-07-26 09:34:21 +0200 |
| commit | e09784728689de7949d4cdd559a9590e0bfcc702 (patch) | |
| tree | 7b58c440768c63049f4fa327f30d3104a57c4b49 /drivers/spi | |
| parent | 1acb70393f2719c70d92f52d91be2525fa1db679 (diff) | |
| download | u-boot-e09784728689de7949d4cdd559a9590e0bfcc702.tar.gz | |
spi: zynq_qspi: Use dummy buswidth in dummy byte calculation
Fix dummy bytes calculation incase of valid dummy bytes when dummy
buswidth is > 1. Current dummy bytes calculation does not provide
correct dummy values for dummy buswidth > 1.
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Link: https://lore.kernel.org/r/1657893679-20039-3-git-send-email-ashok.reddy.soma@xilinx.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/zynq_qspi.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/spi/zynq_qspi.c b/drivers/spi/zynq_qspi.c index 066a0c6002..b138c3c38a 100644 --- a/drivers/spi/zynq_qspi.c +++ b/drivers/spi/zynq_qspi.c @@ -679,6 +679,7 @@ static int zynq_qspi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op) { int op_len, pos = 0, ret, i; + u32 dummy_bytes = 0; unsigned int flag = 0; const u8 *tx_buf = NULL; u8 *rx_buf = NULL; @@ -691,6 +692,11 @@ static int zynq_qspi_exec_op(struct spi_slave *slave, } op_len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes; + if (op->dummy.nbytes) { + op_len = op->cmd.nbytes + op->addr.nbytes + + op->dummy.nbytes / op->dummy.buswidth; + dummy_bytes = op->dummy.nbytes / op->dummy.buswidth; + } u8 op_buf[op_len]; @@ -704,8 +710,8 @@ static int zynq_qspi_exec_op(struct spi_slave *slave, pos += op->addr.nbytes; } - if (op->dummy.nbytes) - memset(op_buf + pos, 0xff, op->dummy.nbytes); + if (dummy_bytes) + memset(op_buf + pos, 0xff, dummy_bytes); /* 1st transfer: opcode + address + dummy cycles */ /* Make sure to set END bit if no tx or rx data messages follow */ |