Commit | Line | Data |
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7d4008eb JI |
1 | * Synopsys DesignWare ABP UART |
2 | ||
3 | Required properties: | |
4 | - compatible : "snps,dw-apb-uart" | |
5 | - reg : offset and length of the register set for the device. | |
6 | - interrupts : should contain uart interrupt. | |
7d78cbef HS |
7 | |
8 | Clock handling: | |
9 | The clock rate of the input clock needs to be supplied by one of | |
7d4008eb | 10 | - clock-frequency : the input clock frequency for the UART. |
7d78cbef HS |
11 | - clocks : phandle to the input clock |
12 | ||
13 | The supplying peripheral clock can also be handled, needing a second property | |
14 | - clock-names: tuple listing input clock names. | |
15 | Required elements: "baudclk", "apb_pclk" | |
7d4008eb JI |
16 | |
17 | Optional properties: | |
7fe090bf | 18 | - resets : phandle to the parent reset controller. |
7d4008eb JI |
19 | - reg-shift : quantity to shift the register offsets by. If this property is |
20 | not present then the register offsets are not shifted. | |
21 | - reg-io-width : the size (in bytes) of the IO accesses that should be | |
22 | performed on the device. If this property is not present then single byte | |
23 | accesses are used. | |
24 | ||
25 | Example: | |
26 | ||
27 | uart@80230000 { | |
28 | compatible = "snps,dw-apb-uart"; | |
29 | reg = <0x80230000 0x100>; | |
30 | clock-frequency = <3686400>; | |
31 | interrupts = <10>; | |
32 | reg-shift = <2>; | |
33 | reg-io-width = <4>; | |
34 | }; | |
7d78cbef HS |
35 | |
36 | Example with one clock: | |
37 | ||
38 | uart@80230000 { | |
39 | compatible = "snps,dw-apb-uart"; | |
40 | reg = <0x80230000 0x100>; | |
41 | clocks = <&baudclk>; | |
42 | interrupts = <10>; | |
43 | reg-shift = <2>; | |
44 | reg-io-width = <4>; | |
45 | }; | |
46 | ||
47 | Example with two clocks: | |
48 | ||
49 | uart@80230000 { | |
50 | compatible = "snps,dw-apb-uart"; | |
51 | reg = <0x80230000 0x100>; | |
52 | clocks = <&baudclk>, <&apb_pclk>; | |
53 | clock-names = "baudclk", "apb_pclk"; | |
54 | interrupts = <10>; | |
55 | reg-shift = <2>; | |
56 | reg-io-width = <4>; | |
57 | }; |