[PATCH 3/4] arm64: dts: imx8mn: Remove unreferenced clock-controller clocks in SPL DTs

[Marek Vasut]

Since 50cdd3f74af3 ("clk: imx: clk-imx8mn Fix nand and spi clock parent"),
drivers/clk/imx/clk-imx8mn.c clk_get_by_name(dev, "osc_24m", &osc_24m_clk)
fails with error -22 EINVAL in SPL. This is because clk_get_by_name() in the
end calls fdtdec_parse_phandle_with_args(), which iterates over all phandles
in clock-controller at 30380000 { clocks = <&osc_32k>, <&osc_24m>, ... } node
'clocks' property in an attempt to find the "osc_24m" clock, but fails to
resolve the &osc_32k phandle and returns with -EINVAL.

Remove the clocks property phandles which cannot be resolved because their
matching nodes are removed from SPL DTs, so fdtdec_parse_phandle_with_args()
can resolve all the remaining valid nodes and successfully look up the osc_24m
clock.

Fixes: 50cdd3f74af3 ("clk: imx: clk-imx8mn Fix nand and spi clock parent")
Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: "NXP i.MX U-Boot Team" <uboot-imx at nxp.com>
Cc: Bryan Brattlof <bb at ti.com>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Greg Malysa <greg.malysa at timesys.com>
Cc: Ian Roberts <ian.roberts at timesys.com>
Cc: Ilias Apalodimas <ilias.apalodimas at linaro.org>
Cc: Jonathan Humphreys <j-humphreys at ti.com>
Cc: Masahisa Kojima <kojima.masahisa at socionext.com>
Cc: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
Cc: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
Cc: Simon Glass <sjg at chromium.org>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Sumit Garg <sumit.garg at linaro.org>
Cc: Tim Harvey <tharvey at gateworks.com>
Cc: Tom Rini <trini at konsulko.com>
Cc: u-boot at lists.denx.de
---
NOTE: For v2025.04
---
 arch/arm/dts/imx8mn-u-boot.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/dts/imx8mn-u-boot.dtsi b/arch/arm/dts/imx8mn-u-boot.dtsi
index 6d80d856365..38e1934aee8 100644
--- a/arch/arm/dts/imx8mn-u-boot.dtsi
+++ b/arch/arm/dts/imx8mn-u-boot.dtsi
@@ -51,6 +51,10 @@
 	/delete-property/ assigned-clocks;
 	/delete-property/ assigned-clock-parents;
 	/delete-property/ assigned-clock-rates;
+#ifdef CONFIG_SPL_BUILD
+	clocks = <&osc_24m>;
+	clock-names = "osc_24m";
+#endif
 };
 
 #ifdef CONFIG_FSL_CAAM
-- 
2.45.2