[PATCH 05/14] spi: spi-mem: Add debug message for spi-mem ops

Sean Anderson
2021-02-01T00:34:27Z

This prints some basic metadata about the SPI memory op. This information
may be used to debug SPI drivers (e.g. determining the expected SPI mode).
It is also helpful for verifying that the data on the wire matches the data
intended to be transmitted (e.g. with a logic analyzer). The opcode is
printed with a format of %02Xh to match the notation commonly used in flash
datasheets.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
---

drivers/spi/spi-mem.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index c095ae9505..eb83c11910 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -220,6 +220,12 @@ int spi_mem_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
int ret;
int i;

+ dev_dbg(slave->dev, "exec %02Xh %u-%u-%u addr=%llx wait=%u len=%u\n",
+ op->cmd.opcode, op->cmd.buswidth, op->addr.buswidth,
+ op->data.buswidth, op->addr.val,
+ op->dummy.buswidth ? op->dummy.nbytes * 8 / op->dummy.buswidth : 0,
+ op->data.nbytes);
+
if (!spi_mem_supports_op(slave, op))
return -ENOTSUPP;

--
2.29.2