Received-SPF: pass (google.com: domain of linux-kernel+bounces-13087-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
From: Mathieu Othacehe <othacehe@gnu.org>
To: Stefan Wahren <wahrenst@gmx.net>
Cc: Rob Herring <robh+dt@kernel.org>,  Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@linaro.org>,  Conor Dooley <conor+dt@kernel.org>,
  Shawn Guo <shawnguo@kernel.org>,  Sascha Hauer <s.hauer@pengutronix.de>,
  Pengutronix Kernel Team <kernel@pengutronix.de>,  Fabio Estevam
 <festevam@gmail.com>,  NXP Linux Team <linux-imx@nxp.com>,  Li Yang
 <leoyang.li@nxp.com>,  devicetree@vger.kernel.org,
  linux-kernel@vger.kernel.org,  linux-arm-kernel@lists.infradead.org,
  Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Subject: Re: [PATCH v4 2/2] arm64: dts: imx93-var-som: Add Variscite
 VAR-SOM-MX93
In-Reply-To: <d378ad67-2a75-4a14-a131-7eb91de9ad3d@gmx.net> (Stefan Wahren's
	message of "Thu, 28 Dec 2023 21:46:08 +0100")
References: <20231227170919.8771-1-othacehe@gnu.org>
	<20231227170919.8771-3-othacehe@gnu.org>
	<d378ad67-2a75-4a14-a131-7eb91de9ad3d@gmx.net>
Date: Fri, 29 Dec 2023 14:00:58 +0100
Message-ID: <87plypqi2d.fsf@gnu.org>
User-Agent: Gnus/5.13 (Gnus v5.13)
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain


Hello Stefan,

> there are neither gpio-line-names defined for this GPIO expander nor the
> SOC. Are there no GPIOs which can be accessed from userspace?

The carrier board schematic is here:
https://www.variscite.com/wp-content/uploads/2023/01/symphony-board_VAR-SOM-MX93.pdf

All the pin headers are mapped to specific functions. On the other,
already mainlined device-trees, that are based on the same "Symphony"
carrier board, there are however gpio-keys for three buttons:


	gpio-keys {
		compatible = "gpio-keys";

		key-back {
			label = "Back";
			gpios = <&pca9534 1 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_BACK>;
		};

		key-home {
			label = "Home";
			gpios = <&pca9534 2 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_HOME>;
		};

		key-menu {
			label = "Menu";
			gpios = <&pca9534 3 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_MENU>;
		};
	};

I can add that in v5.

Thanks,

Mathieu