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Subject[PATCH v3 1/2] spi: aspeed: Add dev_dbg() to dump the spi-mem direct mapping descriptor
Date
The default value of the control register is set using the direct
mapping information passed to the ->dirmap_create() handler. Dump the
mapping range and the SPI memory operation characteristics to analyze
how the register value has been computed.

spi-aspeed-smc 1e630000.spi: CE0 read dirmap [ 0x00000000 - 0x04000000 ] OP 0x6c mode:1.1.1.4 naddr:0x4 ndummies:0x1
...
spi-aspeed-smc 1e630000.spi: CE0 write dirmap [ 0x00000000 - 0x04000000 ] OP 0x12 mode:1.1.0.1 naddr:0x4 ndummies:0x0

Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
drivers/spi/spi-aspeed-smc.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/spi/spi-aspeed-smc.c b/drivers/spi/spi-aspeed-smc.c
index 496f3e1e9079..ac64be289e59 100644
--- a/drivers/spi/spi-aspeed-smc.c
+++ b/drivers/spi/spi-aspeed-smc.c
@@ -558,6 +558,14 @@ static int aspeed_spi_dirmap_create(struct spi_mem_dirmap_desc *desc)
u32 ctl_val;
int ret = 0;

+ dev_dbg(aspi->dev,
+ "CE%d %s dirmap [ 0x%.8llx - 0x%.8llx ] OP %#x mode:%d.%d.%d.%d naddr:%#x ndummies:%#x\n",
+ chip->cs, op->data.dir == SPI_MEM_DATA_IN ? "read" : "write",
+ desc->info.offset, desc->info.offset + desc->info.length,
+ op->cmd.opcode, op->cmd.buswidth, op->addr.buswidth,
+ op->dummy.buswidth, op->data.buswidth,
+ op->addr.nbytes, op->dummy.nbytes);
+
chip->clk_freq = desc->mem->spi->max_speed_hz;

/* Only for reads */
--
2.35.3
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