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From: Wadim Egorov <w.egorov@phytec.de>
To: Bryan Brattlof <bb@ti.com>, Nishanth Menon <nm@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Tero Kristo <kristo@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] arm64: dts: ti: introduce a minimal am642 device tree
Date: Wed, 30 Mar 2022 15:55:45 +0200	[thread overview]
Message-ID: <73a4a16b-193a-3075-61e9-82bcf21fc7d2@phytec.de> (raw)
In-Reply-To: <20220321155417.13267-1-bb@ti.com>

Hi Bryan,

> +/* (optional) for console */
> +&main_uart0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_uart0_pins_default>;
> +};
> +
> +/* reserved for firmware */
> +&main_uart1 {
> +	status = "reserved";
> +};

k3-image-gen says UART0 is used as a debug interface. See

 
https://git.ti.com/cgit/k3-image-gen/k3-image-gen/tree/soc/am64x/evm/board-cfg.c#n81

So it seems that you can enable uart1 here. But people may run into a 
conflict with uart0 and k3-image-gen compiled with ENABLE_TRACE=1.

If I am wrong, can you please clarify why you mark uart1 as reserved.

Regards,
Wadim

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Wadim Egorov <w.egorov@phytec.de>
To: Bryan Brattlof <bb@ti.com>, Nishanth Menon <nm@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Tero Kristo <kristo@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] arm64: dts: ti: introduce a minimal am642 device tree
Date: Wed, 30 Mar 2022 15:55:45 +0200	[thread overview]
Message-ID: <73a4a16b-193a-3075-61e9-82bcf21fc7d2@phytec.de> (raw)
In-Reply-To: <20220321155417.13267-1-bb@ti.com>

Hi Bryan,

> +/* (optional) for console */
> +&main_uart0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_uart0_pins_default>;
> +};
> +
> +/* reserved for firmware */
> +&main_uart1 {
> +	status = "reserved";
> +};

k3-image-gen says UART0 is used as a debug interface. See

 
https://git.ti.com/cgit/k3-image-gen/k3-image-gen/tree/soc/am64x/evm/board-cfg.c#n81

So it seems that you can enable uart1 here. But people may run into a 
conflict with uart0 and k3-image-gen compiled with ENABLE_TRACE=1.

If I am wrong, can you please clarify why you mark uart1 as reserved.

Regards,
Wadim

  parent reply	other threads:[~2022-03-30 13:57 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-21 15:54 [RFC] arm64: dts: ti: introduce a minimal am642 device tree Bryan Brattlof
2022-03-21 15:54 ` Bryan Brattlof
2022-03-22 18:14 ` Krzysztof Kozlowski
2022-03-22 18:14   ` Krzysztof Kozlowski
2024-07-09 16:20   ` Logan Bristol
2024-07-10  6:52     ` Krzysztof Kozlowski
2024-07-15 14:12       ` Logan Bristol
2024-07-10  7:38     ` Francesco Dolcini
2024-07-15 14:02       ` Logan Bristol
2024-07-15 14:55         ` Francesco Dolcini
2022-03-30 13:55 ` Wadim Egorov [this message]
2022-03-30 13:55   ` Wadim Egorov
2022-03-31  6:58   ` Vignesh Raghavendra
2022-03-31  6:58     ` Vignesh Raghavendra
2022-03-31  7:19     ` Wadim Egorov
2022-03-31  7:19       ` Wadim Egorov

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