mirror of https://gitee.com/openkylin/linux.git
149 lines
4.1 KiB
Plaintext
149 lines
4.1 KiB
Plaintext
ST Ericsson Nomadik pinmux controller
|
|
|
|
Required properties:
|
|
- compatible: "stericsson,db8500-pinctrl", "stericsson,db8540-pinctrl",
|
|
"stericsson,stn8815-pinctrl"
|
|
- nomadik-gpio-chips: array of phandles to the corresponding GPIO chips
|
|
(these have the register ranges used by the pin controller).
|
|
- prcm: phandle to the PRCMU managing the back end of this pin controller
|
|
|
|
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".
|
|
|
|
ST Ericsson'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 pin(s)/group(s), and various pin configuration
|
|
parameters, such as input, output, pull up, pull down...
|
|
|
|
The name of each subnode is not important; all subnodes should be enumerated
|
|
and processed purely based on their content. The subnodes use the generic
|
|
pin multiplexing node layout from the standard pin control bindings
|
|
(see pinctrl-bindings.txt):
|
|
|
|
Required pin multiplexing subnode properties:
|
|
- function: A string containing the name of the function to mux to the
|
|
pin or group.
|
|
- groups : An array of strings. Each string contains the name of a pin
|
|
group that will be combined with the function to form a multiplexing
|
|
set-up.
|
|
|
|
Required pin configuration subnode properties:
|
|
- pins: A string array describing the pins affected by the configuration
|
|
in the node.
|
|
- ste,config: Handle of pin configuration node
|
|
(e.g. ste,config = <&slpm_in_wkup_pdis>)
|
|
|
|
- ste,input : <0/1/2>
|
|
0: input with no pull
|
|
1: input with pull up,
|
|
2: input with pull down,
|
|
|
|
- ste,output: <0/1/2>
|
|
0: output low,
|
|
1: output high,
|
|
2: output (value is not specified).
|
|
|
|
- ste,sleep: <0/1>
|
|
0: sleep mode disable,
|
|
1: sleep mode enable.
|
|
|
|
- ste,sleep-input: <0/1/2/3>
|
|
0: sleep input with no pull,
|
|
1: sleep input with pull up,
|
|
2: sleep input with pull down.
|
|
3: sleep input and keep last input configuration (no pull, pull up or pull down).
|
|
|
|
- ste,sleep-output: <0/1/2>
|
|
0: sleep output low,
|
|
1: sleep output high,
|
|
2: sleep output (value is not specified).
|
|
|
|
- ste,sleep-gpio: <0/1>
|
|
0: disable sleep gpio mode,
|
|
1: enable sleep gpio mode.
|
|
|
|
- ste,sleep-wakeup: <0/1>
|
|
0: wake-up detection enabled,
|
|
1: wake-up detection disabled.
|
|
|
|
- ste,sleep-pull-disable: <0/1>
|
|
0: GPIO pull-up or pull-down resistor is enabled, when pin is an input,
|
|
1: GPIO pull-up and pull-down resistor are disabled.
|
|
|
|
Example board file extract:
|
|
|
|
pinctrl@80157000 {
|
|
compatible = "stericsson,db8500-pinctrl";
|
|
nomadik-gpio-chips = <&gpio0>, <&gpio1>, <&gpio2>, <&gpio3>;
|
|
prcm = <&prcmu>;
|
|
|
|
pinctrl-names = "default";
|
|
|
|
slpm_in_wkup_pdis: slpm_in_wkup_pdis {
|
|
ste,sleep = <1>;
|
|
ste,sleep-input = <3>;
|
|
ste,sleep-wakeup = <1>;
|
|
ste,sleep-pull-disable = <0>;
|
|
};
|
|
|
|
slpm_out_hi_wkup_pdis: slpm_out_hi_wkup_pdis {
|
|
ste,sleep = <1>;
|
|
ste,sleep-output = <1>;
|
|
ste,sleep-wakeup = <1>;
|
|
ste,sleep-pull-disable = <0>;
|
|
};
|
|
|
|
slpm_out_wkup_pdis: slpm_out_wkup_pdis {
|
|
ste,sleep = <1>;
|
|
ste,sleep-output = <2>;
|
|
ste,sleep-wakeup = <1>;
|
|
ste,sleep-pull-disable = <0>;
|
|
};
|
|
|
|
uart0 {
|
|
uart0_default_mux: uart0_mux {
|
|
u0_default_mux {
|
|
function = "u0";
|
|
pins = "u0_a_1";
|
|
};
|
|
};
|
|
uart0_default_mode: uart0_default {
|
|
uart0_default_cfg1 {
|
|
pins = "GPIO0", "GPIO2";
|
|
ste,input = <1>;
|
|
};
|
|
|
|
uart0_default_cfg2 {
|
|
pins = "GPIO1", "GPIO3";
|
|
ste,output = <1>;
|
|
};
|
|
};
|
|
uart0_sleep_mode: uart0_sleep {
|
|
uart0_sleep_cfg1 {
|
|
pins = "GPIO0", "GPIO2";
|
|
ste,config = <&slpm_in_wkup_pdis>;
|
|
};
|
|
uart0_sleep_cfg2 {
|
|
pins = "GPIO1";
|
|
ste,config = <&slpm_out_hi_wkup_pdis>;
|
|
};
|
|
uart0_sleep_cfg3 {
|
|
pins = "GPIO3";
|
|
ste,config = <&slpm_out_wkup_pdis>;
|
|
};
|
|
};
|
|
};
|
|
};
|
|
|
|
uart@80120000 {
|
|
compatible = "arm,pl011", "arm,primecell";
|
|
reg = <0x80120000 0x1000>;
|
|
interrupts = <0 11 0x4>;
|
|
|
|
pinctrl-names = "default","sleep";
|
|
pinctrl-0 = <&uart0_default_mux>, <&uart0_default_mode>;
|
|
pinctrl-1 = <&uart0_sleep_mode>;
|
|
};
|