2008-07-08 00:28:33 +08:00
|
|
|
* SPI (Serial Peripheral Interface)
|
|
|
|
|
|
|
|
Required properties:
|
2010-10-12 18:18:33 +08:00
|
|
|
- cell-index : QE SPI subblock index.
|
|
|
|
0: QE subblock SPI1
|
|
|
|
1: QE subblock SPI2
|
2013-02-15 23:52:26 +08:00
|
|
|
- compatible : should be "fsl,spi" or "aeroflexgaisler,spictrl".
|
2008-07-08 00:28:33 +08:00
|
|
|
- mode : the SPI operation mode, it can be "cpu" or "cpu-qe".
|
|
|
|
- reg : Offset and length of the register set for the device
|
|
|
|
- interrupts : <a b> where a is the interrupt number and b is a
|
|
|
|
field that represents an encoding of the sense and level
|
|
|
|
information for the interrupt. This should be encoded based on
|
|
|
|
the information in section 2) depending on the type of interrupt
|
|
|
|
controller you have.
|
2013-02-15 23:52:21 +08:00
|
|
|
- clock-frequency : input clock frequency to non FSL_SOC cores
|
2008-07-08 00:28:33 +08:00
|
|
|
|
2010-02-17 22:33:02 +08:00
|
|
|
Optional properties:
|
2019-11-28 20:16:35 +08:00
|
|
|
- cs-gpios : specifies the gpio pins to be used for chipselects.
|
2010-02-17 22:33:02 +08:00
|
|
|
The gpios will be referred to as reg = <index> in the SPI child nodes.
|
|
|
|
If unspecified, a single SPI device without a chip select can be used.
|
2019-03-06 18:32:05 +08:00
|
|
|
- fsl,spisel_boot : for the MPC8306 and MPC8309, specifies that the
|
|
|
|
SPISEL_BOOT signal is used as chip select for a slave device. Use
|
|
|
|
reg = <number of gpios> in the corresponding child node, i.e. 0 if
|
2019-11-28 20:16:35 +08:00
|
|
|
the cs-gpios property is not present.
|
2010-02-17 22:33:02 +08:00
|
|
|
|
2008-07-08 00:28:33 +08:00
|
|
|
Example:
|
|
|
|
spi@4c0 {
|
|
|
|
cell-index = <0>;
|
|
|
|
compatible = "fsl,spi";
|
|
|
|
reg = <4c0 40>;
|
|
|
|
interrupts = <82 0>;
|
|
|
|
interrupt-parent = <700>;
|
|
|
|
mode = "cpu";
|
2019-11-28 20:16:35 +08:00
|
|
|
cs-gpios = <&gpio 18 1 // device reg=<0>
|
|
|
|
&gpio 19 1>; // device reg=<1>
|
2008-07-08 00:28:33 +08:00
|
|
|
};
|
2010-10-12 18:18:33 +08:00
|
|
|
|
|
|
|
|
|
|
|
* eSPI (Enhanced Serial Peripheral Interface)
|
|
|
|
|
|
|
|
Required properties:
|
|
|
|
- compatible : should be "fsl,mpc8536-espi".
|
|
|
|
- reg : Offset and length of the register set for the device.
|
|
|
|
- interrupts : should contain eSPI interrupt, the device has one interrupt.
|
|
|
|
- fsl,espi-num-chipselects : the number of the chipselect signals.
|
|
|
|
|
2014-04-17 04:09:39 +08:00
|
|
|
Optional properties:
|
|
|
|
- fsl,csbef: chip select assertion time in bits before frame starts
|
|
|
|
- fsl,csaft: chip select negation time in bits after frame ends
|
|
|
|
|
2010-10-12 18:18:33 +08:00
|
|
|
Example:
|
|
|
|
spi@110000 {
|
|
|
|
#address-cells = <1>;
|
|
|
|
#size-cells = <0>;
|
|
|
|
compatible = "fsl,mpc8536-espi";
|
|
|
|
reg = <0x110000 0x1000>;
|
|
|
|
interrupts = <53 0x2>;
|
|
|
|
interrupt-parent = <&mpic>;
|
|
|
|
fsl,espi-num-chipselects = <4>;
|
2014-04-17 04:09:39 +08:00
|
|
|
fsl,csbef = <1>;
|
|
|
|
fsl,csaft = <1>;
|
2010-10-12 18:18:33 +08:00
|
|
|
};
|