spi: aspeed: Add dev_dbg() to dump the spi-mem direct mapping descriptor

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>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20220622161617.3719096-2-clg@kaod.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-aspeed-smc.c b/drivers/spi/spi-aspeed-smc.c
index 496f3e1e9079b0886865b48a319df507e727a7e0..ac64be289e59986764cf5d56861fc97573b3a1a2 100644 (file)
--- 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 */