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Message-ID: <87zfxtosyy.fsf@gnu.org>
Date: Fri, 29 Dec 2023 17:48:21 +0100
From: Mathieu Othacehe <othacehe@....org>
To: Stefan Wahren <wahrenst@....net>
Cc: Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski
<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam
<festevam@...il.com>, NXP Linux Team <linux-imx@....com>, Li Yang
<leoyang.li@....com>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v4 2/2] arm64: dts: imx93-var-som: Add Variscite
VAR-SOM-MX93
Hey,
> I also saw in the other Symphony DTS a LED for heartbeat. Is it usable, too?
Yes, I will add it to in v5.
> According to the datasheet the SOM expose 7 UARTs, but only the debug
> UART is enable. What is the reason for this?
So those 7 UARTs are:
UART1: console
UART2: used by the microphone
UART3: used by the resistive touch
UART4: used by the ethernet/resistive touch
UART5: on J18.4,6,8,10 (used by BT)
UART6: on J18.7 and J18.9 (available)
UART7: on J18.3 and J18.5 (used by the M33 firmware)
I will enable UART6, and add a mention about UART7, something like:
/* J18.7, J18.9 */
&lpuart6 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart6>;
status = "okay";
};
/* J18.3, J18.5 - used by M33 firmware */
&lpuart7 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart7>;
status = "disabled";
};
> Btw the commit log mentions a Wifi (via SDIO?) and audio interface. This
> is currently not supported by Linux?
I am not sure about that, and I would prefer to study that a bit later
on if that's OK :) I can remove it from the commit log as this is
misleading as not already supported / tested.
Thanks,
Mathieu
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