Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752797AbaA2Shk (ORCPT ); Wed, 29 Jan 2014 13:37:40 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:46648 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751116AbaA2Shi convert rfc822-to-8bit (ORCPT ); Wed, 29 Jan 2014 13:37:38 -0500 From: "Gupta, Pekon" To: Rob Herring , Boris BREZILLON , "Ezequiel Garcia (ezequiel.garcia@free-electrons.com)" , Brian Norris CC: "devicetree@vger.kernel.org" , Russell King , Arnd Bergmann , "linux-doc@vger.kernel.org" , "dev@linux-sunxi.org" , "linux-kernel@vger.kernel.org" , Jason Gunthorpe , "linux-mtd@lists.infradead.org" , Rob Landley , Grant Likely , Maxime Ripard , David Woodhouse , "Balbi, Felipe" , "linux-arm-kernel@lists.infradead.org" Subject: RE: [RFC PATCH v2 09/14] mtd: nand: add sunxi NFC dt bindings doc Thread-Topic: [RFC PATCH v2 09/14] mtd: nand: add sunxi NFC dt bindings doc Thread-Index: AQHPHQDG7gDqSNJGr0CJa2YBBD67QpqbajQAgACR39CAAAm+AA== Date: Wed, 29 Jan 2014 18:36:25 +0000 Message-ID: <20980858CB6D3A4BAE95CA194937D5E73EA6C05D@DBDE04.ent.ti.com> References: <1391006064-28890-1-git-send-email-b.brezillon.dev@gmail.com> <1391006064-28890-10-git-send-email-b.brezillon.dev@gmail.com> <20980858CB6D3A4BAE95CA194937D5E73EA6C01D@DBDE04.ent.ti.com> In-Reply-To: <20980858CB6D3A4BAE95CA194937D5E73EA6C01D@DBDE04.ent.ti.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.24.170.142] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear Rob, and other DT maintainers, (apologies, fixed typos in earlier mail) >>From: Rob Herring >[...] >>> +- onfi,nand-timing-mode : mandatory if the chip does not support the ONFI >>> + standard. >> >>Add to generic nand binding. >> >>> +- allwinner,rb : shall contain the native Ready/Busy ids. >>> + or >>> +- rb-gpios : shall contain the gpios used as R/B pins. >> >>Isn't allwinner,rb implied by a lack of rb-gpios property. Or no R/B >>pin is an option? If so, don't you need some fixed time delay >>properties like max erase time? >> >>rb-gpios could be added to the generic nand binding as well. >> I do _not_ think this should go into generic nand binding, as this is controller specific. Some controllers have dedicated R/B pin (Ready/Busy) while others may use GPIO instead. It's the way a hardware controller is designed. Request you to please consider Ack from MTD Maintainers 'at-least' for generic NAND DT bindings. There is already a discussion going in a separate thread for which there are still no replies [1]. [1] http://lists.infradead.org/pipermail/linux-mtd/2014-January/051625.html with regards, pekon -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/