Re: [PATCH 1/2] ls2080a/dts: Add little endian property for GPIO IP block
From: Linus Walleij <hidden>
Date: 2015-11-16 15:11:32
Also in:
linux-arm-kernel, linux-gpio
On Tue, Nov 3, 2015 at 12:19 PM, Liu Gang [off-list ref] wrote:
quoted hunk
The GPIO block for ls2080a platform has little endian registers, the GPIO driver needs this property to read/write registers by right interface. Signed-off-by: Liu Gang <redacted>diff --git a/Documentation/devicetree/bindings/gpio/gpio-mpc8xxx.txt b/Documentation/devicetree/bindings/gpio/gpio-mpc8xxx.txt index f2455c5..c836dab 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-mpc8xxx.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-mpc8xxx.txt@@ -10,6 +10,9 @@ Required properties: the second cell is used to specify the gpio polarity: 0 = active high 1 = active low +- little-endian : Should be set if the GPIO has little endian + registers. No the property means the GPIO + registers are big endian mode.
That is a very generic binding and I would like the devicetree maintainers to say something about this. I would be OK if this is specified for *all* gpiochips in Documentation/devicetree/bindings/gpio/gpio.txt or even higher up in the desriptions. Just for Freescale seems a bit too local. Yours, Linus Walleij