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[v2,2/7] ARM: dts: samsung: exynos4: specify the SPI FIFO depth

Message ID 20240216140449.2564625-3-tudor.ambarus@linaro.org
State New
Headers show
Series ARM: dts: samsung: specify the SPI FIFO depth | expand

Commit Message

Tudor Ambarus Feb. 16, 2024, 2:04 p.m. UTC 
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>
---
 arch/arm/boot/dts/samsung/exynos4.dtsi | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/arch/arm/boot/dts/samsung/exynos4.dtsi b/arch/arm/boot/dts/samsung/exynos4.dtsi
index 7f981b5c0d64..ed47d0ce04e1 100644
--- a/arch/arm/boot/dts/samsung/exynos4.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos4.dtsi
@@ -621,6 +621,7 @@  spi_0: spi@13920000 {
 			clock-names = "spi", "spi_busclk0";
 			pinctrl-names = "default";
 			pinctrl-0 = <&spi0_bus>;
+			fifo-depth = <256>;
 			status = "disabled";
 		};
 
@@ -636,6 +637,7 @@  spi_1: spi@13930000 {
 			clock-names = "spi", "spi_busclk0";
 			pinctrl-names = "default";
 			pinctrl-0 = <&spi1_bus>;
+			fifo-depth = <64>;
 			status = "disabled";
 		};
 
@@ -651,6 +653,7 @@  spi_2: spi@13940000 {
 			clock-names = "spi", "spi_busclk0";
 			pinctrl-names = "default";
 			pinctrl-0 = <&spi2_bus>;
+			fifo-depth = <64>;
 			status = "disabled";
 		};