On Sun, Jul 31, 2016 at 08:45:21PM +0530, Vinay Simha BN wrote: [...] > diff --git a/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt b/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt [...] > +- reset-gpios: phandle of gpio for reset line > + This should be 8mA, gpio can be configured using mux, pinctrl, pinctrl-names > + XRES, Reset, Low active > +- enable-gpios: phandle of gpio for enable line > + LED_EN, LED backlight enable, High active This is a little confusing. Shouldn't we rather completely omit any mention of the polarity of these and let the board design handle this? If the reset is low active, then I'd expect that to be reflected in the GPIO specifier of the reset-gpios property, like so: panel@0 { ... reset-gpios = <&tlmm_pinmux 54 GPIO_ACTIVE_LOW>; ... }; With that a driver can simply deal with a high active reset, which it currently doesn't. The problem with the current description is that it is unclear who's to deal with the polarity. In order for this to work properly with the current driver you'll have to specify the GPIO as GPIO_ACTIVE_HIGH, which is not what the binding says it should be. Thierry
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