1 * NXP LPC1850 Clock Control Unit (CCU)
2
3 Each CGU base clock has several clock branches
4 or off independently by the Clock Control Unit
5 branch clocks are distributed between CCU1 and
6
7 - Above text taken from NXP LPC1850 User Manu
8
9 This binding uses the common clock binding:
10 Documentation/devicetree/bindings/clock/cl
11
12 Required properties:
13 - compatible:
14 Should be "nxp,lpc1850-ccu"
15 - reg:
16 Shall define the base and range of the
17 containing clock control registers
18 - #clock-cells:
19 Shall have value <1>. The permitted c
20 are the branch clock names defined in
21 - clocks:
22 Shall contain a list of phandles for t
23 from the CGU to the specific CCU. See
24 and CCU in table below.
25 - clock-names:
26 Shall contain a list of names for the
27 from the CGU to the specific CCU. Vali
28 "base_usb0_clk", "base_periph_clk", "
29 "base_cpu_clk", "base_spifi_clk", "
30 "base_apb1_clk", "base_apb3_clk", "
31 "base_sdio_clk", "base_ssp0_clk", "
32 "base_uart0_clk", "base_uart1_clk", "
33 "base_uart3_clk", "base_audio_clk"
34
35 Which branch clocks that are available on the
36 specific LPC part. Check the user manual for y
37
38 A list of CCU clocks can be found in dt-bindin
39
40 Example board file:
41
42 soc {
43 ccu1: clock-controller@40051000 {
44 compatible = "nxp,lpc1850-ccu"
45 reg = <0x40051000 0x1000>;
46 #clock-cells = <1>;
47 clocks = <&cgu BASE_APB3_CLK>,
48 <&cgu BASE_SPIFI_CLK>
49 <&cgu BASE_PERIPH_CLK
50 <&cgu BASE_USB1_CLK>,
51 clock-names = "base_apb3_clk",
52 "base_spifi_clk"
53 "base_periph_clk
54 "base_usb1_clk",
55 };
56
57 ccu2: clock-controller@40052000 {
58 compatible = "nxp,lpc1850-ccu"
59 reg = <0x40052000 0x1000>;
60 #clock-cells = <1>;
61 clocks = <&cgu BASE_AUDIO_CLK>
62 <&cgu BASE_UART2_CLK>
63 <&cgu BASE_UART0_CLK>
64 <&cgu BASE_SSP0_CLK>,
65 clock-names = "base_audio_clk"
66 "base_uart2_clk"
67 "base_uart0_clk"
68 "base_ssp0_clk",
69 };
70
71 /* A user of CCU branch clocks */
72 uart1: serial@40082000 {
73 ...
74 clocks = <&ccu2 CLK_APB0_UART1
75 ...
76 };
77 };
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