48 lines
1.7 KiB
Plaintext
48 lines
1.7 KiB
Plaintext
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CSR SiRFprimaII pinmux controller
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Required properties:
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- compatible : "sirf,prima2-pinctrl"
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- reg : Address range of the pinctrl registers
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- interrupts : Interrupts used by every GPIO group
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- gpio-controller : Indicates this device is a GPIO controller
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- interrupt-controller : Marks the device node as an interrupt controller
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Optional properties:
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- sirf,pullups : if n-th bit of m-th bank is set, set a pullup on GPIO-n of bank m
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- sirf,pulldowns : if n-th bit of m-th bank is set, set a pulldown on GPIO-n of bank m
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Please refer to pinctrl-bindings.txt in this directory for details of the common
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pinctrl bindings used by client devices.
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SiRFprimaII's pinmux nodes act as a container for an arbitrary number of subnodes.
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Each of these subnodes represents some desired configuration for a group of pins.
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Required subnode-properties:
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- sirf,pins : An array of strings. Each string contains the name of a group.
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- sirf,function: A string containing the name of the function to mux to the
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group.
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Valid values for group and function names can be found from looking at the
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group and function arrays in driver files:
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drivers/pinctrl/pinctrl-sirf.c
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For example, pinctrl might have subnodes like the following:
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uart2_pins_a: uart2@0 {
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uart {
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sirf,pins = "uart2grp";
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sirf,function = "uart2";
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};
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};
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uart2_noflow_pins_a: uart2@1 {
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uart {
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sirf,pins = "uart2_nostreamctrlgrp";
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sirf,function = "uart2_nostreamctrl";
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};
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};
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For a specific board, if it wants to use uart2 without hardware flow control,
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it can add the following to its board-specific .dts file.
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uart2: uart@b0070000 {
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pinctrl-names = "default";
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pinctrl-0 = <&uart2_noflow_pins_a>;
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}
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