Commit 414d7b8c authored by Tudor Ambarus's avatar Tudor Ambarus Committed by Mark Brown
Browse files

spi: s3c64xx: retrieve the FIFO depth from the device tree 



There are SoCs that configure different FIFO depths for their instances
of the SPI IP. See the fifo_lvl_mask defined for exynos4_spi_port_config
for example:
        .fifo_lvl_mask  = { 0x1ff, 0x7F, 0x7F },
The first instance of the IP is configured with 256 bytes FIFOs, whereas
the last two are configured with 64 bytes FIFOs.

Instead of mangling with the .fifo_lvl_mask and its dependency of the DT
alias ID, allow such SoCs to determine the FIFO depth via the
``fifo-depth`` DT property.

Signed-off-by: default avatarTudor Ambarus <tudor.ambarus@linaro.org>
Link: https://msgid.link/r/20240216070555.2483977-6-tudor.ambarus@linaro.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c6e776ab

drivers/spi/spi-s3c64xx.c

+3 −1
Original line number Diff line number Diff line
@@ -1263,6 +1263,8 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) 
		sdd->port_id = pdev->id;

	}



	if (of_property_read_u32(pdev->dev.of_node, "fifo-depth",

				 &sdd->fifo_depth))

		sdd->fifo_depth = FIFO_DEPTH(sdd);



	s3c64xx_spi_set_fifomask(sdd);