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sc16is7xx: spi interface documentation

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Updated the documentation for spi interface.

Signed-off-by: Rama Kiran Kumar Indrakanti <indrakanti_ram@hotmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rama Kiran Kumar Indrakanti 2015-05-25 11:51:10 +05:30 committed by Greg Kroah-Hartman
parent 2c837a8a8f
commit 8f4a912022
1 changed files with 37 additions and 0 deletions
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37
Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
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@ -1,4 +1,5 @@
* NXP SC16IS7xx advanced Universal Asynchronous Receiver-Transmitter (UART)
* i2c as bus
Required properties:
- compatible: Should be one of the following:
@ -31,3 +32,39 @@ Example:
gpio-controller;
#gpio-cells = <2>;
};
* spi as bus
Required properties:
- compatible: Should be one of the following:
- "nxp,sc16is740" for NXP SC16IS740,
- "nxp,sc16is741" for NXP SC16IS741,
- "nxp,sc16is750" for NXP SC16IS750,
- "nxp,sc16is752" for NXP SC16IS752,
- "nxp,sc16is760" for NXP SC16IS760,
- "nxp,sc16is762" for NXP SC16IS762.
- reg: SPI chip select number.
- interrupt-parent: The phandle for the interrupt controller that
services interrupts for this IC.
- interrupts: Specifies the interrupt source of the parent interrupt
controller. The format of the interrupt specifier depends on the
parent interrupt controller.
- clocks: phandle to the IC source clock.
Optional properties:
- gpio-controller: Marks the device node as a GPIO controller.
- #gpio-cells: Should be two. The first cell is the GPIO number and
the second cell is used to specify the GPIO polarity:
0 = active high,
1 = active low.
Example:
sc16is750: sc16is750@0 {
compatible = "nxp,sc16is750";
reg = <0>;
clocks = <&clk20m>;
interrupt-parent = <&gpio3>;
interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
gpio-controller;
#gpio-cells = <2>;
};