From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 798D413D2BC; Mon, 6 May 2024 22:09:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.19.141 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715033383; cv=none; b=DIstzl2o84hBH9u/PZVhsQyhdXGBTdkoAbhWfRuGkKL83ItJO6LsSpbUPu1men4iun//Yy0DqeoKNfaiWwkKhe0l0Jj0/21zKa87/KQtOljo9Wp9Hd2127zM3uHxYd4V5qVknvTE9GNVoY5RhBRE1gLVA4ptVTR/s+Tp7sk5bXU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715033383; c=relaxed/simple; bh=r9BFmWG8V1HVuQ4IJR5EcoibqvPzjOfGBGYBkHWhi+U=; h=Message-ID:Date:MIME-Version:Subject:From:To:CC:References: In-Reply-To:Content-Type; b=BgJAsLCuwC1cbUgQjEbnxXjkRhITexVZ+pJ+kPoFALQgdfkYf8NG3wRC/lT/+Kxc8sHY8IYvAByIZDJoqwmLqm9dZB3QixRloXP0kaTA8yeQc0pFIlpZpFFfBAbKdFc8TQ5ApLm3EXAnnW0SRlDA/iCotJj8ZCPEPcIceLhtOfA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=UujdRw8N; arc=none smtp.client-ip=198.47.19.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="UujdRw8N" Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 446M9XNn076862; Mon, 6 May 2024 17:09:34 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1715033374; bh=10wWVMhpZZp5B3uqn2MuHEK3VuAoIokX6nqD6qsNfl8=; h=Date:Subject:From:To:CC:References:In-Reply-To; b=UujdRw8NAd23gEHguZJfZrn540v/EhRp9VbQfMYSm2RQUXz3iMZj6RR7Va9SRklgq ESQ+7QtGfQLtPx8ICwP3mAqz+QdfEkDDWW8BK7urQnQdXOK6BIEym/5oX2Vhds5pJ2 IblpC0RdGQu8ZTXIhpaZayo7m+Z9yHEJmSPgBy9Q= Received: from DLEE110.ent.ti.com (dlee110.ent.ti.com [157.170.170.21]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 446M9Xch021857 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 6 May 2024 17:09:33 -0500 Received: from DLEE105.ent.ti.com (157.170.170.35) by DLEE110.ent.ti.com (157.170.170.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Mon, 6 May 2024 17:09:33 -0500 Received: from lelvsmtp6.itg.ti.com (10.180.75.249) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Mon, 6 May 2024 17:09:33 -0500 Received: from [128.247.81.105] (judy-hp.dhcp.ti.com [128.247.81.105]) by lelvsmtp6.itg.ti.com (8.15.2/8.15.2) with ESMTP id 446M9XUX120857; Mon, 6 May 2024 17:09:33 -0500 Message-ID: <8651bce3-d097-465d-b8a7-c12e9d8a77b1@ti.com> Date: Mon, 6 May 2024 17:09:33 -0500 Precedence: bulk X-Mailing-List: linux-omap@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] ARM: dts: am335x: Add PRU system events for virtio From: Judith Mendez To: CC: , , Krzysztof Kozlowski , Conor Dooley , Tony Lindgren , Rob Herring , =?UTF-8?Q?Beno=C3=AEt_Cousson?= References: <20240501194157.2727136-1-jm@ti.com> Content-Language: en-US In-Reply-To: <20240501194157.2727136-1-jm@ti.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Hi all, On 5/1/24 2:41 PM, Judith Mendez wrote: > From: Nick Saulnier > > A PRU system event "vring" has been added to each of the PRU nodes in > the PRU-ICSS remote processor subsystem to enable the virtio/rpmsg > communication between MPU and that PRU core. The additions are done > in the base am33xx-l4.dtsi, and so are inherited by all the AM335x > boards. Do note that PRUSS is available only on all AM3356+ SoCs. > > The PRU system events is the preferred approach over using OMAP > mailboxes, as it eliminates an external peripheral access from > the PRU-side, and keeps the interrupt generation internal to the > PRUSS. The difference from MPU would be minimal in using one > versus the other. > > Mailboxes can still be used if desired, but currently there is no > support on firmware-side for the SoC to use mailboxes. Either approach > would require that an appropriate firmware image is loaded/booted on > the PRU. Please ignore this patch, Thanks, Judith