Based on kernel version 5.16
. Page generated on 2022-01-10 18:31 EST
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | * Samsung S5P6442/S5PC110/S5PV210 Clock Controller Samsung S5P6442, S5PC110 and S5PV210 SoCs contain integrated clock controller, which generates and supplies clock to various controllers within the SoC. Required Properties: - compatible: should be one of following: - "samsung,s5pv210-clock" : for clock controller of Samsung S5PC110/S5PV210 SoCs, - "samsung,s5p6442-clock" : for clock controller of Samsung S5P6442 SoC. - reg: physical base address of the controller and length of memory mapped region. - #clock-cells: should be 1. All available clocks are defined as preprocessor macros in dt-bindings/clock/s5pv210.h header and can be used in device tree sources. External clocks: There are several clocks that are generated outside the SoC. It is expected that they are defined using standard clock bindings with following clock-output-names: - "xxti": external crystal oscillator connected to XXTI and XXTO pins of the SoC, - "xusbxti": external crystal oscillator connected to XUSBXTI and XUSBXTO pins of the SoC, A subset of above clocks available on given board shall be specified in board device tree, including the system base clock, as selected by XOM[0] pin of the SoC. Refer to generic fixed rate clock bindings documentation[1] for more information how to specify these clocks. [1] Documentation/devicetree/bindings/clock/fixed-clock.yaml Example: Clock controller node: clock: clock-controller@7e00f000 { compatible = "samsung,s5pv210-clock"; reg = <0x7e00f000 0x1000>; #clock-cells = <1>; }; Example: Required external clocks: xxti: clock-xxti { compatible = "fixed-clock"; clock-output-names = "xxti"; clock-frequency = <24000000>; #clock-cells = <0>; }; xusbxti: clock-xusbxti { compatible = "fixed-clock"; clock-output-names = "xusbxti"; clock-frequency = <24000000>; #clock-cells = <0>; }; Example: UART controller node that consumes the clock generated by the clock controller (refer to the standard clock bindings for information about "clocks" and "clock-names" properties): uart0: serial@e2900000 { compatible = "samsung,s5pv210-uart"; reg = <0xe2900000 0x400>; interrupt-parent = <&vic1>; interrupts = <10>; clock-names = "uart", "clk_uart_baud0", "clk_uart_baud1"; clocks = <&clocks UART0>, <&clocks UART0>, <&clocks SCLK_UART0>; }; |