mirror of
https://github.com/torvalds/linux.git
synced 2024-12-23 19:31:53 +00:00
e28c6d941d
J721e uses a UART controller that is compatible with AM654 UART. Introduce a specific compatible to help handle the differences if necessary. Cc: Sekhar Nori <nsekhar@ti.com> Cc: Vignesh R <vigneshr@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Tero Kristo <t-kristo@ti.com>
40 lines
1.9 KiB
Plaintext
40 lines
1.9 KiB
Plaintext
OMAP UART controller
|
|
|
|
Required properties:
|
|
- compatible : should be "ti,j721e-uart", "ti,am654-uart" for J721E controllers
|
|
- compatible : should be "ti,am654-uart" for AM654 controllers
|
|
- compatible : should be "ti,omap2-uart" for OMAP2 controllers
|
|
- compatible : should be "ti,omap3-uart" for OMAP3 controllers
|
|
- compatible : should be "ti,omap4-uart" for OMAP4 controllers
|
|
- compatible : should be "ti,am4372-uart" for AM437x controllers
|
|
- compatible : should be "ti,am3352-uart" for AM335x controllers
|
|
- compatible : should be "ti,dra742-uart" for DRA7x controllers
|
|
- reg : address and length of the register space
|
|
- interrupts or interrupts-extended : Should contain the uart interrupt
|
|
specifier or both the interrupt
|
|
controller phandle and interrupt
|
|
specifier.
|
|
- ti,hwmods : Must be "uart<n>", n being the instance number (1-based)
|
|
|
|
Optional properties:
|
|
- clock-frequency : frequency of the clock input to the UART
|
|
- dmas : DMA specifier, consisting of a phandle to the DMA controller
|
|
node and a DMA channel number.
|
|
- dma-names : "rx" for receive channel, "tx" for transmit channel.
|
|
- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
|
|
- rs485-rts-active-high: drive RTS high when sending (default is low).
|
|
- clocks: phandle to the functional clock as per
|
|
Documentation/devicetree/bindings/clock/clock-bindings.txt
|
|
|
|
Example:
|
|
|
|
uart4: serial@49042000 {
|
|
compatible = "ti,omap3-uart";
|
|
reg = <0x49042000 0x400>;
|
|
interrupts = <80>;
|
|
dmas = <&sdma 81 &sdma 82>;
|
|
dma-names = "tx", "rx";
|
|
ti,hwmods = "uart4";
|
|
clock-frequency = <48000000>;
|
|
};
|