On Wed, Oct 23, 2013 at 05:24:14PM -0500, Rob Herring wrote:
> So a twl4030 device is only a power button? DT should describe the h/w
> not a node for a sub-function of a device.
No. TWL4030 is a companion chip for the OMAP3 processor. It provides
miscellaneous functionality, e.g.:
* RTC
* Watchdog
* Regulators
* Keypad Matrix
* USB
* Audio
* Vibrator
* GPIO
* ...
One part of the functionality is the power button. The patch
assumes, that the twl4030-pwrbutton node is used as follows:
twl {
/* ... common stuff ... */
pwrbutton {
compatible = "ti,twl4030-pwrbutton";
interrupts = <8>;
};
};
See also:
* Documentation/devicetree/bindings/mfd/twl-familly.txt
* Documentation/devicetree/bindings/watchdog/twl4030-wdt.txt
* Documentation/devicetree/bindings/sound/omap-twl4030.txt
* Documentation/devicetree/bindings/mfd/twl4030-power.txt
* Documentation/devicetree/bindings/mfd/twl4030-audio.txt
* Documentation/devicetree/bindings/gpio/gpio-twl4030.txt
-- Sebastian
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