From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH] pinctrl: dra: dt-bindings: Add virtual mode configuration option Date: Tue, 14 Jul 2015 04:10:10 -0700 Message-ID: <20150714111009.GS17550@atomide.com> References: <1434986546-2211-1-git-send-email-nm@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1434986546-2211-1-git-send-email-nm-l0cyMroinI0@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Nishanth Menon Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-omap@vger.kernel.org * Nishanth Menon [150622 08:24]: > In addition to the regular mux configuration such as mux mode 1, > 2 etc, certain pins of DRA7 require to have "virtual mode" also > programmed. This allows for predefined delay characteristics to > be used by the SoC to meet timing characterstics needed for the > interface. > > Provide easy to use macro to do the same. > > It is important to note that the official TI guidelines recommend > to do as minimal pin reconfiguration beyond the bootloader given > the design of the hardware involved which can result in substantial > glitches which may impair functionality of certain peripherals. Applying into omap-for-v4.3/dt thanks. Tony -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Tue, 14 Jul 2015 04:10:10 -0700 Subject: [PATCH] pinctrl: dra: dt-bindings: Add virtual mode configuration option In-Reply-To: <1434986546-2211-1-git-send-email-nm@ti.com> References: <1434986546-2211-1-git-send-email-nm@ti.com> Message-ID: <20150714111009.GS17550@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Nishanth Menon [150622 08:24]: > In addition to the regular mux configuration such as mux mode 1, > 2 etc, certain pins of DRA7 require to have "virtual mode" also > programmed. This allows for predefined delay characteristics to > be used by the SoC to meet timing characterstics needed for the > interface. > > Provide easy to use macro to do the same. > > It is important to note that the official TI guidelines recommend > to do as minimal pin reconfiguration beyond the bootloader given > the design of the hardware involved which can result in substantial > glitches which may impair functionality of certain peripherals. Applying into omap-for-v4.3/dt thanks. Tony From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751277AbbGNLKQ (ORCPT ); Tue, 14 Jul 2015 07:10:16 -0400 Received: from muru.com ([72.249.23.125]:35259 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750996AbbGNLKO (ORCPT ); Tue, 14 Jul 2015 07:10:14 -0400 Date: Tue, 14 Jul 2015 04:10:10 -0700 From: Tony Lindgren To: Nishanth Menon Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH] pinctrl: dra: dt-bindings: Add virtual mode configuration option Message-ID: <20150714111009.GS17550@atomide.com> References: <1434986546-2211-1-git-send-email-nm@ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1434986546-2211-1-git-send-email-nm@ti.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Nishanth Menon [150622 08:24]: > In addition to the regular mux configuration such as mux mode 1, > 2 etc, certain pins of DRA7 require to have "virtual mode" also > programmed. This allows for predefined delay characteristics to > be used by the SoC to meet timing characterstics needed for the > interface. > > Provide easy to use macro to do the same. > > It is important to note that the official TI guidelines recommend > to do as minimal pin reconfiguration beyond the bootloader given > the design of the hardware involved which can result in substantial > glitches which may impair functionality of certain peripherals. Applying into omap-for-v4.3/dt thanks. Tony