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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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/st/stm32mp231.dtsi index a6840882f512b132b69b917ccbc6cfd4a502a481..05055bc523850282a2e2b217b180930b39231189 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 = <0>; }; + clk_flexgen_27_fixed: clk-54000000 { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <54000000>; + }; + clk_rcbsec: clk-64000000 { compatible = "fixed-clock"; #clock-cells = <0>; diff --git a/arch/arm64/boot/dts/st/stm32mp235.dtsi b/arch/arm64/boot/dts/st/stm32mp235.dtsi index 2719c088dd594ba90f683d8809b54fecf471ba40..ae98f503529f0a2473f250b4d9195820135ee1bc 100644 --- a/arch/arm64/boot/dts/st/stm32mp235.dtsi +++ b/arch/arm64/boot/dts/st/stm32mp235.dtsi @@ -5,6 +5,12 @@ */ #include "stm32mp233.dtsi" +<dc { + compatible = "st,stm32mp255-ltdc"; + clocks = <&clk_flexgen_27_fixed>, <&rcc CK_BUS_LTDC>, <&syscfg>, <&lvds>; + clock-names = "lcd", "bus", "ref", "lvds"; +}; + &rifsc { vdec: vdec@480d0000 { compatible = "st,stm32mp25-vdec"; -- 2.43.0