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 Reviewed-by: Pratyush Yadav p.yadav@ti.com ---
(no changes since v2)
Changes in v2: - Add more information to exec_op debug message
drivers/spi/spi-mem.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index c095ae9505..6772367ef7 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -220,6 +220,13 @@ 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 dummy cycles=%u data bytes=%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;