tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1OMAP UART controller
2
3Required properties:
4- compatible : should be "ti,am654-uart" for AM654 controllers
5- compatible : should be "ti,omap2-uart" for OMAP2 controllers
6- compatible : should be "ti,omap3-uart" for OMAP3 controllers
7- compatible : should be "ti,omap4-uart" for OMAP4 controllers
8- compatible : should be "ti,am4372-uart" for AM437x controllers
9- compatible : should be "ti,am3352-uart" for AM335x controllers
10- compatible : should be "ti,dra742-uart" for DRA7x controllers
11- reg : address and length of the register space
12- interrupts or interrupts-extended : Should contain the uart interrupt
13 specifier or both the interrupt
14 controller phandle and interrupt
15 specifier.
16- ti,hwmods : Must be "uart<n>", n being the instance number (1-based)
17
18Optional properties:
19- clock-frequency : frequency of the clock input to the UART
20- dmas : DMA specifier, consisting of a phandle to the DMA controller
21 node and a DMA channel number.
22- dma-names : "rx" for receive channel, "tx" for transmit channel.
23- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
24- rs485-rts-active-high: drive RTS high when sending (default is low).
25- clocks: phandle to the functional clock as per
26 Documentation/devicetree/bindings/clock/clock-bindings.txt
27
28Example:
29
30 uart4: serial@49042000 {
31 compatible = "ti,omap3-uart";
32 reg = <0x49042000 0x400>;
33 interrupts = <80>;
34 dmas = <&sdma 81 &sdma 82>;
35 dma-names = "tx", "rx";
36 ti,hwmods = "uart4";
37 clock-frequency = <48000000>;
38 };