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