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Sebastian Andrzej Siewior
authored and
Grant Likely
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Feb 3, 2012
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trunk/Documentation/devicetree/bindings/gpio/sodaville.txt
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GPIO controller on CE4100 / Sodaville SoCs | ||
========================================== | ||
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The bindings for CE4100's GPIO controller match the generic description | ||
which is covered by the gpio.txt file in this folder. | ||
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The only additional property is the intel,muxctl property which holds the | ||
value which is written into the MUXCNTL register. | ||
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There is no compatible property for now because the driver is probed via | ||
PCI id (vendor 0x8086 device 0x2e67). | ||
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The interrupt specifier consists of two cells encoded as follows: | ||
- <1st cell>: The interrupt-number that identifies the interrupt source. | ||
- <2nd cell>: The level-sense information, encoded as follows: | ||
4 - active high level-sensitive | ||
8 - active low level-sensitive | ||
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Example of the GPIO device and one user: | ||
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pcigpio: gpio@b,1 { | ||
/* two cells for GPIO and interrupt */ | ||
#gpio-cells = <2>; | ||
#interrupt-cells = <2>; | ||
compatible = "pci8086,2e67.2", | ||
"pci8086,2e67", | ||
"pciclassff0000", | ||
"pciclassff00"; | ||
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reg = <0x15900 0x0 0x0 0x0 0x0>; | ||
/* Interrupt line of the gpio device */ | ||
interrupts = <15 1>; | ||
/* It is an interrupt and GPIO controller itself */ | ||
interrupt-controller; | ||
gpio-controller; | ||
intel,muxctl = <0>; | ||
}; | ||
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testuser@20 { | ||
compatible = "example,testuser"; | ||
/* User the 11th GPIO line as an active high triggered | ||
* level interrupt | ||
*/ | ||
interrupts = <11 8>; | ||
interrupt-parent = <&pcigpio>; | ||
/* Use this GPIO also with the gpio functions */ | ||
gpios = <&pcigpio 11 0>; | ||
}; |
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