linux-kernel - Re: [PATCH v5 08/12] gpio: add QIXIS FPGA GPIO controller

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Message-Id: <DCZEJ8PE0AGL.6WORKBVKONBK@kernel.org>
Date: Mon, 22 Sep 2025 16:34:13 +0200
From: "Michael Walle" <mwalle@...nel.org>
To: "Ioana Ciornei" <ioana.ciornei@....com>, "Rob Herring"
 <robh@...nel.org>, "Krzysztof Kozlowski" <krzk+dt@...nel.org>, "Conor
 Dooley" <conor+dt@...nel.org>, "Linus Walleij" <linus.walleij@...aro.org>,
 "Bartosz Golaszewski" <brgl@...ev.pl>, "Shawn Guo" <shawnguo@...nel.org>,
 "Lee Jones" <lee@...nel.org>, <devicetree@...r.kernel.org>,
 <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Cc: "Frank Li" <Frank.Li@....com>
Subject: Re: [PATCH v5 08/12] gpio: add QIXIS FPGA GPIO controller

> Add support for the GPIO controller found on some QIXIS FPGAs in
> Layerscape boards such as LX2160ARDB and LS1046AQDS. This driver is
> using gpio-regmap.
>
> A GPIO controller has a maximum of 8 lines (all found in the same
> register). Even within the same controller, the GPIO lines' direction is
> fixed, which mean that both input and output lines are found in the same
> register. This is why the driver also passed to gpio-regmap the newly
> added .fixed_direction_output bitmap to represent the true direction of
> the lines.
>
> Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
> Reviewed-by: Frank Li <Frank.Li@....com>

Reviewed-by: Michael Walle <mwalle@...nel.org> # for the gpio-regmap part

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