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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: nnWvdQWGcz86IiU4P1g6MIE6H2IbxfNgEAc8DrUs5KMZdWjHYb7vYqYZ+wdco5Q/bb0IO3rukkZy+q9pTQWaSWgh9jum5Myan05ecNhSpAfpr4DgKgteiPuhhlsEtjV6+gYc4g8O+mp4ucK86muq20Htf8J9NIRyecH9nHMHZZuAJC4UrBuaIRffY4Leb+2WEw3IEZd09ZHpPLgHdKrWRmxZyQdtQHl476+4LAbRv3qRF0oj4ijyeuc9jHnD3WRaYogFRt2kIBBoV+OGLfb0OI/QQkbfKHrVg+//0NpzeUQTuFtBkjmo0bBgp+/1kPCI6jo6sZpyrsAbdXCkV7jrtcN5kYcufynAEhhiwgixSgSpdjhm5bXpl9FLbR5HNZtWL6UyNMWAM7isestCSPtHLpHqMz5ciWUdb2fdOsaIg1L6nKuxcKd+iLF4lCjS/lbp X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Feb 2026 10:03:55.5751 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6952640f-4dad-4c44-cdff-08de688bb3a0 X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.59];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: AMS1EPF00000040.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBAPR10MB4059 Add the LTDC node for stm32mp235 SoC and handle its loopback clocks. ck_ker_ltdc has the CLK_SET_RATE_PARENT flag. While having this flag is semantically correct, it for now leads to an improper setting of the clock rate. The ck_ker_ltdc parent clock is the flexgen 27, which does not support changing rates yet. To overcome this issue, a fixed clock can be used for the kernel clock. Signed-off-by: Raphael Gallais-Pou --- arch/arm64/boot/dts/st/stm32mp231.dtsi | 6 ++++++ arch/arm64/boot/dts/st/stm32mp235.dtsi | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/arch/arm64/boot/dts/st/stm32mp231.dtsi b/arch/arm64/boot/dts/s= t/stm32mp231.dtsi index a6840882f512b132b69b917ccbc6cfd4a502a481..05055bc523850282a2e2b217b18= 0930b39231189 100644 --- a/arch/arm64/boot/dts/st/stm32mp231.dtsi +++ b/arch/arm64/boot/dts/st/stm32mp231.dtsi @@ -45,6 +45,12 @@ clk_dsi_txbyte: clock-0 { clock-frequency =3D <0>; }; =20 + clk_flexgen_27_fixed: clk-54000000 { + #clock-cells =3D <0>; + compatible =3D "fixed-clock"; + clock-frequency =3D <54000000>; + }; + clk_rcbsec: clk-64000000 { compatible =3D "fixed-clock"; #clock-cells =3D <0>; diff --git a/arch/arm64/boot/dts/st/stm32mp235.dtsi b/arch/arm64/boot/dts/s= t/stm32mp235.dtsi index 2719c088dd594ba90f683d8809b54fecf471ba40..ae98f503529f0a2473f250b4d91= 95820135ee1bc 100644 --- a/arch/arm64/boot/dts/st/stm32mp235.dtsi +++ b/arch/arm64/boot/dts/st/stm32mp235.dtsi @@ -5,6 +5,12 @@ */ #include "stm32mp233.dtsi" =20 +<dc { + compatible =3D "st,stm32mp255-ltdc"; + clocks =3D <&clk_flexgen_27_fixed>, <&rcc CK_BUS_LTDC>, <&syscfg>, <&lvds= >; + clock-names =3D "lcd", "bus", "ref", "lvds"; +}; + &rifsc { vdec: vdec@480d0000 { compatible =3D "st,stm32mp25-vdec"; --=20 2.43.0