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Mon, 2 Jul 2018 03:05:08 -0500 Received: from DFLE114.ent.ti.com (10.64.6.35) by DFLE108.ent.ti.com (10.64.6.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Mon, 2 Jul 2018 03:05:08 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Mon, 2 Jul 2018 03:05:08 -0500 Received: from [192.168.2.6] (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w628549g012595; Mon, 2 Jul 2018 03:05:05 -0500 Subject: Re: [PATCH 5/8] remoteproc: new driver for TI PRU To: Derald Woods CC: David Lechner , , , , , Ohad Ben-Cohen , Bjorn Andersson , Rob Herring , Mark Rutland , =?UTF-8?Q?Beno=c3=aet_Cousson?= , Tony Lindgren , Sekhar Nori , Kevin Hilman , , "Anna, Suman" , Tero Kristo References: <20180623210810.21232-1-david@lechnology.com> <20180623210810.21232-6-david@lechnology.com> From: Roger Quadros Openpgp: preference=signencrypt Autocrypt: addr=rogerq@ti.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Language: en-GB Content-Transfer-Encoding: 8bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Derald, On 30/06/18 22:02, Derald Woods wrote: > > > On Fri, Jun 29, 2018 at 5:14 AM, Roger Quadros > wrote: > > > > On 24/06/18 00:08, David Lechner wrote: > > This adds a new remoteproc driver for TI Programmable Realtime Units > > (PRUs). > > > > This has been tested working on AM1808 (LEGO MINDSTORMS EV3) using the > > sample rpmsg client driver. > > > > Signed-off-by: David Lechner > > > --- > >  MAINTAINERS                       |   5 + > >  drivers/remoteproc/Kconfig        |   7 + > >  drivers/remoteproc/Makefile       |   1 + > >  drivers/remoteproc/ti_pru_rproc.c | 660 ++++++++++++++++++++++++++++++ > >  4 files changed, 673 insertions(+) > >  create mode 100644 drivers/remoteproc/ti_pru_rproc.c > > We already have a working irq_chip implementation for INTC. > https://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-linux-4.14.y/drivers/remoteproc/pruss_intc.c > > I think we can leverage directly from that. > > This way pru_rproc or client device nodes can easily specify a pruss_intc interrupt parent and the > SYSEVENT number as the irq. Then device drivers can simply use request_irq(). > > example usage here > https://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-linux-4.14.y/arch/arm/boot/dts/am33xx.dtsi#line986 > https://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-linux-4.14.y/drivers/remoteproc/pru_rproc.c#line670 > > > > > ​Is this PRU code on a path to be added to the mainline kernel?​ There is an increase in the number of available systems which would benefit from consistent PRU interfaces. If code is not mainlined, or on a mainline path, some may think it is not usable or ready for production. Is this a permanent "out-of-tree" and/or "TI-tree" development. Just wondering. > Yes, we constantly upstream our work. We are currently working to get the PRU support upstream. -- cheers, -roger Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki