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ARM: dts: imx6sx: remove fallback compatible string fsl,imx28-lcdif

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The i.MX6SX LCDIF is not fully compatible with the i.MX28 LCDIF. The
i.MX6SX controller provides additional overlay registers (AS_CTRL) which
are not present on i.MX28.

Linux has supported the dedicated compatible string since commit
45d59d7040 ("drm: Add new driver for MXSFB controller").

Other known DT users such as U-Boot and Barebox already support
"fsl,imx6sx-lcdif", so removing the fallback compatible string is low risk
since this device is used for display output only.

Fix the following CHECK_DTB warning:
/arch/arm/boot/dts/nxp/imx/imx6sx-nitrogen6sx.dtb: lcdif@2220000 (fsl,imx6sx-lcdif): compatible: 'oneOf' conditional failed, one must be fixed:
        ['fsl,imx6sx-lcdif', 'fsl,imx28-lcdif'] is too long

Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Frank Li 2026-03-11 15:41:11 -04:00
parent 3432749efe
commit c59ebeb2ad
1 changed files with 2 additions and 2 deletions
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4
arch/arm/boot/dts/nxp/imx/imx6sx.dtsi
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@ -1304,7 +1304,7 @@ csi2: csi@221c000 {
};
lcdif1: lcdif@2220000 {
compatible = "fsl,imx6sx-lcdif", "fsl,imx28-lcdif";
compatible = "fsl,imx6sx-lcdif";
reg = <0x02220000 0x4000>;
interrupts = <GIC_SPI 5 IRQ_TYPE_EDGE_RISING>;
clocks = <&clks IMX6SX_CLK_LCDIF1_PIX>,
@ -1325,7 +1325,7 @@ lcdif1_to_ldb: endpoint {
};
lcdif2: lcdif@2224000 {
compatible = "fsl,imx6sx-lcdif", "fsl,imx28-lcdif";
compatible = "fsl,imx6sx-lcdif";
reg = <0x02224000 0x4000>;
interrupts = <GIC_SPI 6 IRQ_TYPE_EDGE_RISING>;
clocks = <&clks IMX6SX_CLK_LCDIF2_PIX>,