From 6212e5bc6979c17da1d54fb0841e99a967101d11 Mon Sep 17 00:00:00 2001
From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Date: Mon, 11 Dec 2023 23:05:52 +0100
Subject: [PATCH] ARM: dts: stm32: make the LTDC clock usable by the clock
 driver

As described in [1], the "clocks" property contains "a phandle to the
clock device node, an index selecting between gated clocks (0) and other
clocks (1), and an index specifying the clock to use." The current version
of the clock driver, unlike the kernel, is currently able to properly
handle nodes with "clocks" properties with an index set to 0.

This patch is preparatory for future developments that require the use
of the LTDC clock.

[1] Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
---
 arch/arm/dts/stm32f469-disco-u-boot.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/dts/stm32f469-disco-u-boot.dtsi b/arch/arm/dts/stm32f469-disco-u-boot.dtsi
index c07e2022e4..dcc70369cd 100644
--- a/arch/arm/dts/stm32f469-disco-u-boot.dtsi
+++ b/arch/arm/dts/stm32f469-disco-u-boot.dtsi
@@ -134,6 +134,10 @@
 	bootph-all;
 };
 
+&ltdc {
+	clocks = <&rcc 0 STM32F4_APB2_CLOCK(LTDC)>;
+};
+
 &pinctrl {
 	bootph-all;
 
-- 
2.39.5