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Barry Song
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Linus Walleij
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Dec 26, 2012
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trunk/Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt
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CSR SiRFprimaII pinmux controller | ||
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Required properties: | ||
- compatible : "sirf,prima2-pinctrl" | ||
- reg : Address range of the pinctrl registers | ||
- interrupts : Interrupts used by every GPIO group | ||
- gpio-controller : Indicates this device is a GPIO controller | ||
- interrupt-controller : Marks the device node as an interrupt controller | ||
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Please refer to pinctrl-bindings.txt in this directory for details of the common | ||
pinctrl bindings used by client devices. | ||
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SiRFprimaII's pinmux nodes act as a container for an abitrary number of subnodes. | ||
Each of these subnodes represents some desired configuration for a group of pins. | ||
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Required subnode-properties: | ||
- sirf,pins : An array of strings. Each string contains the name of a group. | ||
- sirf,function: A string containing the name of the function to mux to the | ||
group. | ||
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Valid values for group and function names can be found from looking at the | ||
group and function arrays in driver files: | ||
drivers/pinctrl/pinctrl-sirf.c | ||
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For example, pinctrl might have subnodes like the following: | ||
uart2_pins_a: uart2@0 { | ||
uart { | ||
sirf,pins = "uart2grp"; | ||
sirf,function = "uart2"; | ||
}; | ||
}; | ||
uart2_noflow_pins_a: uart2@1 { | ||
uart { | ||
sirf,pins = "uart2_nostreamctrlgrp"; | ||
sirf,function = "uart2_nostreamctrl"; | ||
}; | ||
}; | ||
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For a specific board, if it wants to use uart2 without hardware flow control, | ||
it can add the following to its board-specific .dts file. | ||
uart2: uart@0xb0070000 { | ||
pinctrl-names = "default"; | ||
pinctrl-0 = <&uart2_noflow_pins_a>; | ||
} |