Received-SPF: pass (google.com: domain of linux-kernel+bounces-13116-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) client-ip=147.75.48.161;
Message-ID: <4e3a0328-0ae7-40fa-b37d-16b661e28a1e@gmx.net>
Date: Fri, 29 Dec 2023 15:08:02 +0100
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v4 2/2] arm64: dts: imx93-var-som: Add Variscite
 VAR-SOM-MX93
To: Mathieu Othacehe <othacehe@gnu.org>
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>
References: <20231227170919.8771-1-othacehe@gnu.org>
 <20231227170919.8771-3-othacehe@gnu.org>
 <d378ad67-2a75-4a14-a131-7eb91de9ad3d@gmx.net> <87plypqi2d.fsf@gnu.org>
Content-Language: en-US
From: Stefan Wahren <wahrenst@gmx.net>
In-Reply-To: <87plypqi2d.fsf@gnu.org>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: quoted-printable
UI-OutboundReport: notjunk:1;M01:P0:x8uTtUQkO5c=;KnDIxyxuuGR1LdlLLLvoQqmJXLw
 NVvS8chYXspy1GWnsJ+gS97V3zof++jD8kVICb2N3bReHWCQQMLPhtkejngfk8PZzPbzD9Xpg
 7xvRE+Il9s3Estp+/jswEnj1ZIge+8DwRyPFwkQpJInuwX19t+n/qHpuPxtKX4c7t13oq2h3u
 ctO4Pbc6tXC71ritKeUV7uET857SlKsl3fqLOL86wZfsXH7CQJ/8r01MxxA/o5TXnC4Eqzvm9
 VRBNsvCCdlb5X89Nb5vebaePbSWEi1E4DXuyPeOZqT2uwXF882yu+oSJTGqREzePfoShFyGKN
 aZKAQsiZjH/5v8D7bec828Rxek3wbp+E3C85FSCpwTeyDU4U5ao/8xeJ+fUkHYmDbPr4UMCMa
 biDc6EiIJx2tELH6DWJR6z+FSwmxDLuBOBQtBqR4FkdHdvXnNJH66MS5YvTBpzPLZk9ocT6j/
 wGTWw67xghqnUcLnfYAnGgIHmGdzguDFnIU6Pm6Gv+D8iMM8ESIr66M44bdH4aFyvux0R+ndP
 4yKMmOXGR4ZnM6bsr0pF8CekZLff+o9He7MGzH27/C5rwebnDcvzvGC5Pnm4esGaJYTlquB1w
 r+VTLDKQbfiNoqkDgwrOub5WeQKQI+UIMgEav8TrYef7LQWS/a65r9oKkWMz97PJZpXryHxUp
 KNnuCqi7qv0Y7dcMJU/A3/AeIgSDlXs5xXnuQTMsqwj61qw7LG3YUSsoyHhjzrmTa8eLw7X0f
 8w3imXDGzAkdZ8P7ns/8fo82TmjpQ/E2h7zPIJquIH3fhBPBVeheiI3YxU/vryFmjV9OTC9O6
 qPCrFyfE9SSt6TwVKnOnQSxvBn7XW3MktZgsd53fv9kdLCY5d6ywHScHaTzmt2FRa1q0mEKzt
 obKSZKd3GnuWp5eCt8EDwTy5/c1cOmY1+GtqU1UuY0c0dTkV3Ru7eq6jNOPebuk8pm2tjkvkD
 jNSeEhUFDryl65dPIMRsZSITAx+wGr2kzcXs40Q7bJtrSUuz

Hi Mathieu,

Am 29.12.23 um 14:00 schrieb Mathieu Othacehe:
> Hello Stefan,
>
>> there are neither gpio-line-names defined for this GPIO expander nor th=
e
>> 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
Thanks this helps.
>
> 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 =3D "gpio-keys";
>
> 		key-back {
> 			label =3D "Back";
> 			gpios =3D <&pca9534 1 GPIO_ACTIVE_LOW>;
> 			linux,code =3D <KEY_BACK>;
> 		};
>
> 		key-home {
> 			label =3D "Home";
> 			gpios =3D <&pca9534 2 GPIO_ACTIVE_LOW>;
> 			linux,code =3D <KEY_HOME>;
> 		};
>
> 		key-menu {
> 			label =3D "Menu";
> 			gpios =3D <&pca9534 3 GPIO_ACTIVE_LOW>;
> 			linux,code =3D <KEY_MENU>;
> 		};
> 	};
>
> I can add that in v5.
yes please.

I also saw in the other Symphony DTS a LED for heartbeat. Is it usable, to=
o?

According to the datasheet the SOM expose 7 UARTs, but only the debug
UART is enable. What is the reason for this?

Btw the commit log mentions a Wifi (via SDIO?) and audio interface. This
is currently not supported by Linux?

Thanks
>
> Thanks,
>
> Mathieu