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ARM: dts: samsung: exynos4: specify the SPI FIFO depth 

Up to now the SPI alias was used as an index into an array defined in
the SPI driver to determine the SPI FIFO depth. Drop the dependency on
the SPI alias and specify the SPI FIFO depth directly into the SPI node.

exynos4.dtsi defines the following SPI aliases:
	spi0 = &spi_0;
	spi1 = &spi_1;
	spi2 = &spi_2;
spi-s3c64xx.c driver defines the following fifo_lvl_mask for the
"samsung,exynos4210-spi" compatible:
	.fifo_lvl_mask  = { 0x1ff, 0x7F, 0x7F },
Thus spi0 was considered having a 256 byte FIFO depth, and spi1 and spi2
having 64 byte FIFO depth each. Update device tree with these FIFO depths.
No functional change expected.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20240216140449.2564625-3-tudor.ambarus@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Tudor Ambarus 2024-02-16 14:04:44 +00:00 committed by Krzysztof Kozlowski
parent 43dc9f88ff
commit f743fedc88
1 changed files with 3 additions and 0 deletions
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3
arch/arm/boot/dts/samsung/exynos4.dtsi
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@ -621,6 +621,7 @@
clock-names = "spi", "spi_busclk0";
pinctrl-names = "default";
pinctrl-0 = <&spi0_bus>;
fifo-depth = <256>;
status = "disabled";
};
@ -636,6 +637,7 @@
clock-names = "spi", "spi_busclk0";
pinctrl-names = "default";
pinctrl-0 = <&spi1_bus>;
fifo-depth = <64>;
status = "disabled";
};
@ -651,6 +653,7 @@
clock-names = "spi", "spi_busclk0";
pinctrl-names = "default";
pinctrl-0 = <&spi2_bus>;
fifo-depth = <64>;
status = "disabled";
};