From mboxrd@z Thu Jan 1 00:00:00 1970 From: vitor Subject: Re: [PATCH v6 01/10] i3c: Add core I3C infrastructure Date: Mon, 3 Sep 2018 10:33:11 +0100 Message-ID: <9584757a-e7e2-5bfe-fc2c-e9bc14ad65a8@synopsys.com> References: <20180719152930.3715-1-boris.brezillon@bootlin.com> <20180719152930.3715-2-boris.brezillon@bootlin.com> <20180824143934.6d6b6487@bbrezillon> <20180824201600.7d80bca9@bbrezillon> <20180828140209.29155d00@bbrezillon> <4DBE768F-3CDC-41BE-9CC8-E294E7277CB1@cadence.com> <8abfb007-d755-36a4-5960-fddd61d04aa2@synopsys.com> <3D2681D9-1ACC-42FF-9FAB-D86B3C689003@cadence.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <3D2681D9-1ACC-42FF-9FAB-D86B3C689003@cadence.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Przemyslaw Gaj , vitor , Boris Brezillon Cc: "linux-gpio@vger.kernel.org" , Sekhar Nori , Wolfram Sang , "linux-i2c@vger.kernel.org" , Jonathan Corbet , "linux-doc@vger.kernel.org" , Greg Kroah-Hartman , Arnd Bergmann , Przemyslaw Sroka , Arkadiusz Golec , Alan Douglas , Bartosz Folta , Damian Kos , Alicja Jurasik-Urbaniak , Cyprian Wronka , Suresh Punnoose , Rafal Ciepiela , Thomas Petazzoni , Nishanth Menon List-Id: devicetree@vger.kernel.org Hi Przemek, On 30-08-2018 20:00, Przemyslaw Gaj wrote: > So, per my understanding since the Main master support the hand-off of > the bus you accept all incoming MR, right? Or do you check all devices BCR? > > I'm not sure what do you mean here. Mastership request(MR) is from secondary master > to current master. Current master can NACK this request if for example it comes from > wrong device. If it's ok, current master sends GETACCMST command and secondary master > may ACK or NACK this command. It it's acked, secondary master becomes current master. > > Best regards, > Vitor Soares > > Please let me know if something is unclear. > > Regards, > Przemek > Sorry, it s not clear yet. For instances there is a bus with several secondary master. If each of them request the bus mastership (one at a time), will you accept all by default? Because you can only accept only some of them. Regards, Vitor Soares