84 lines
2.6 KiB
Plaintext
Executable file
84 lines
2.6 KiB
Plaintext
Executable file
Lantiq FALCON pinmux controller
|
|
|
|
Required properties:
|
|
- compatible: "lantiq,pinctrl-falcon"
|
|
- reg: Should contain the physical address and length of the gpio/pinmux
|
|
register range
|
|
|
|
Please refer to pinctrl-bindings.txt in this directory for details of the
|
|
common pinctrl bindings used by client devices, including the meaning of the
|
|
phrase "pin configuration node".
|
|
|
|
Lantiq's pin configuration nodes act as a container for an arbitrary number of
|
|
subnodes. Each of these subnodes represents some desired configuration for a
|
|
pin, a group, or a list of pins or groups. This configuration can include the
|
|
mux function to select on those group(s), and two pin configuration parameters:
|
|
pull-up and open-drain
|
|
|
|
The name of each subnode is not important as long as it is unique; all subnodes
|
|
should be enumerated and processed purely based on their content.
|
|
|
|
Each subnode only affects those parameters that are explicitly listed. In
|
|
other words, a subnode that lists a mux function but no pin configuration
|
|
parameters implies no information about any pin configuration parameters.
|
|
Similarly, a pin subnode that describes a pullup parameter implies no
|
|
information about e.g. the mux function.
|
|
|
|
We support 2 types of nodes.
|
|
|
|
Definition of mux function groups:
|
|
|
|
Required subnode-properties:
|
|
- lantiq,groups : An array of strings. Each string contains the name of a group.
|
|
Valid values for these names are listed below.
|
|
- lantiq,function: A string containing the name of the function to mux to the
|
|
group. Valid values for function names are listed below.
|
|
|
|
Valid values for group and function names:
|
|
|
|
mux groups:
|
|
por, ntr, ntr8k, hrst, mdio, bootled, asc0, spi, spi cs0, spi cs1, i2c,
|
|
jtag, slic, pcm, asc1
|
|
|
|
functions:
|
|
rst, ntr, mdio, led, asc, spi, i2c, jtag, slic, pcm
|
|
|
|
|
|
Definition of pin configurations:
|
|
|
|
Required subnode-properties:
|
|
- lantiq,pins : An array of strings. Each string contains the name of a pin.
|
|
Valid values for these names are listed below.
|
|
|
|
Optional subnode-properties:
|
|
- lantiq,pull: Integer, representing the pull-down/up to apply to the pin.
|
|
0: none, 1: down
|
|
- lantiq,drive-current: Boolean, enables drive-current
|
|
- lantiq,slew-rate: Boolean, enables slew-rate
|
|
|
|
Example:
|
|
pinmux0 {
|
|
compatible = "lantiq,pinctrl-falcon";
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&state_default>;
|
|
|
|
state_default: pinmux {
|
|
asc0 {
|
|
lantiq,groups = "asc0";
|
|
lantiq,function = "asc";
|
|
};
|
|
ntr {
|
|
lantiq,groups = "ntr8k";
|
|
lantiq,function = "ntr";
|
|
};
|
|
i2c {
|
|
lantiq,groups = "i2c";
|
|
lantiq,function = "i2c";
|
|
};
|
|
hrst {
|
|
lantiq,groups = "hrst";
|
|
lantiq,function = "rst";
|
|
};
|
|
};
|
|
};
|