[PATCH 05/12] spi: s3c64xx: retrieve the FIFO depth from the device tree
From: Tudor Ambarus <tudor.ambarus@linaro.org>
Date: 2024-02-08 13:50:59
Also in:
linux-devicetree, linux-samsung-soc, linux-spi, lkml
Subsystem:
arm/samsung s3c, s5p and exynos arm architectures, samsung spi drivers, spi subsystem, the rest · Maintainers:
Krzysztof Kozlowski, Peter Griffin, Andi Shyti, Mark Brown, Linus Torvalds
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: Tudor Ambarus <tudor.ambarus@linaro.org>
---
drivers/spi/spi-s3c64xx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 72572e23cde5..b1c63f75021d 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c@@ -1263,7 +1263,9 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) sdd->port_id = pdev->id; } - sdd->fifo_depth = FIFO_DEPTH(sdd); + 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);
--
2.43.0.687.g38aa6559b0-goog
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel