103 lines
2.8 KiB
Plaintext
103 lines
2.8 KiB
Plaintext
OMAP SSI controller bindings
|
|
|
|
OMAP3's Synchronous Serial Interface (SSI) controller implements a
|
|
legacy variant of MIPI's High Speed Synchronous Serial Interface (HSI),
|
|
while the controller found inside OMAP4 is supposed to be fully compliant
|
|
with the HSI standard.
|
|
|
|
Required properties:
|
|
- compatible: Should include "ti,omap3-ssi" or "ti,omap4-hsi"
|
|
- reg-names: Contains the values "sys" and "gdd" (in this order).
|
|
- reg: Contains a matching register specifier for each entry
|
|
in reg-names.
|
|
- interrupt-names: Contains the value "gdd_mpu".
|
|
- interrupts: Contains matching interrupt information for each entry
|
|
in interrupt-names.
|
|
- ranges: Represents the bus address mapping between the main
|
|
controller node and the child nodes below.
|
|
- clock-names: Must include the following entries:
|
|
"ssi_ssr_fck": The OMAP clock of that name
|
|
"ssi_sst_fck": The OMAP clock of that name
|
|
"ssi_ick": The OMAP clock of that name
|
|
- clocks: Contains a matching clock specifier for each entry in
|
|
clock-names.
|
|
- #address-cells: Should be set to <1>
|
|
- #size-cells: Should be set to <1>
|
|
|
|
Each port is represented as a sub-node of the ti,omap3-ssi device.
|
|
|
|
Required Port sub-node properties:
|
|
- compatible: Should be set to the following value
|
|
ti,omap3-ssi-port (applicable to OMAP34xx devices)
|
|
ti,omap4-hsi-port (applicable to OMAP44xx devices)
|
|
- reg-names: Contains the values "tx" and "rx" (in this order).
|
|
- reg: Contains a matching register specifier for each entry
|
|
in reg-names.
|
|
- interrupts: Should contain interrupt specifiers for mpu interrupts
|
|
0 and 1 (in this order).
|
|
- ti,ssi-cawake-gpio: Defines which GPIO pin is used to signify CAWAKE
|
|
events for the port. This is an optional board-specific
|
|
property. If it's missing the port will not be
|
|
enabled.
|
|
|
|
Optional properties:
|
|
- ti,hwmods: Shall contain TI interconnect module name if needed
|
|
by the SoC
|
|
|
|
Example for Nokia N900:
|
|
|
|
ssi-controller@48058000 {
|
|
compatible = "ti,omap3-ssi";
|
|
|
|
/* needed until hwmod is updated to use the compatible string */
|
|
ti,hwmods = "ssi";
|
|
|
|
reg = <0x48058000 0x1000>,
|
|
<0x48059000 0x1000>;
|
|
reg-names = "sys",
|
|
"gdd";
|
|
|
|
interrupts = <55>;
|
|
interrupt-names = "gdd_mpu";
|
|
|
|
clocks = <&ssi_ssr_fck>,
|
|
<&ssi_sst_fck>,
|
|
<&ssi_ick>;
|
|
clock-names = "ssi_ssr_fck",
|
|
"ssi_sst_fck",
|
|
"ssi_ick";
|
|
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
ranges;
|
|
|
|
ssi-port@4805a000 {
|
|
compatible = "ti,omap3-ssi-port";
|
|
|
|
reg = <0x4805a000 0x800>,
|
|
<0x4805a800 0x800>;
|
|
reg-names = "tx",
|
|
"rx";
|
|
|
|
interrupt-parent = <&intc>;
|
|
interrupts = <67>,
|
|
<68>;
|
|
|
|
ti,ssi-cawake-gpio = <&gpio5 23 GPIO_ACTIVE_HIGH>; /* 151 */
|
|
}
|
|
|
|
ssi-port@4805a000 {
|
|
compatible = "ti,omap3-ssi-port";
|
|
|
|
reg = <0x4805b000 0x800>,
|
|
<0x4805b800 0x800>;
|
|
reg-names = "tx",
|
|
"rx";
|
|
|
|
interrupt-parent = <&intc>;
|
|
interrupts = <69>,
|
|
<70>;
|
|
|
|
}
|
|
}
|