On 11/11/2012 09:21 AM, Andrew Lunn wrote: > From: Jamie Lentin <[email protected]> > > Given appropriate devicetree bindings, this driver registers a > pm_power_off function to set a GPIO line high/low to power down > your board.
This feature will be useful for the Tegra TrimSlice board too. > diff --git a/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt > b/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt > +Required properties: > +- compatible : should be "gpio-poweroff". > +- gpios : The GPIO to set high/low, see "gpios property" in > + Documentation/devicetree/bindings/gpio/gpio.txt. If the pin should be > + low to power down the board set it to "Active Low", otherwise set > + gpio to "Active High". Unfortunately, not all GPIO bindings support active high/low flags in the GPIO specifier. As such, the flags there are basically useless. Other bindings (e.g. IIRC the fixed-regulator binding) have added a separate active-high property to indicate the GPIO polarity. This binding should probably follow suite. _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
