From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nishanth Menon Subject: Re: [PATCH 01/18] ARM: am57xx: cl-som-am57x: dts: add basic module support Date: Mon, 30 Nov 2015 07:36:26 -0600 Message-ID: <565C50DA.4010901@gmail.com> References: <1448433590-1399-1-git-send-email-lifshitz@compulab.co.il> <1448433590-1399-2-git-send-email-lifshitz@compulab.co.il> <565629D2.2010401@ti.com> <565AEB19.4050107@compulab.co.il> <565B307E.2000203@ti.com> <565C4F54.50405@compulab.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <565C4F54.50405-UTxiZqZC01RS1MOuV/RT9w@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Dmitry Lifshitz , Nishanth Menon , linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Toni Lindgren , Igor Grinberg , Nikita Kiryanov , Ian Campbell List-Id: devicetree@vger.kernel.org On 11/30/2015 07:29 AM, Dmitry Lifshitz wrote: > On 11/29/2015 07:06 PM, Nishanth Menon wrote: >> On 11/29/2015 06:10 AM, Dmitry Lifshitz wrote: [...] >> >> You might want to ask your TI support contact for IODelay >> recommendations. TRM mentions that pinmuxing must be performed under IO >> isolation. There are silicon constraints in DRA7/AM57xx family, which >> were not present previously. >> > > Ok. I understand. This might take time... > Since we'd like to have this in for 4.5, what would you recommend? > Should I drop the muxes from this patch set? All the muxes? > Or should we merge this (as it works correctly) in our tests and check > on this later after investigation with TI? > > Also, in theory, there might be pins shared between two or more > different functionalities and remuxed during runtime. > Can this kind of thing be supported on AM57x? This is why I suggested to talk and confirm with TI support contact on this. I understand the motivation of SoM concept, but this requires some careful designing around. -- Regards, Nishanth Menon -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html