From patchwork Tue May 19 13:34:11 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martinez Canillas X-Patchwork-Id: 6437671 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8833AC0432 for ; Tue, 19 May 2015 13:36:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 382EA2041E for ; Tue, 19 May 2015 13:36:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DB2F20429 for ; Tue, 19 May 2015 13:36:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755979AbbESNgR (ORCPT ); Tue, 19 May 2015 09:36:17 -0400 Received: from bhuna.collabora.co.uk ([93.93.135.160]:52913 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755677AbbESNev (ORCPT ); Tue, 19 May 2015 09:34:51 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: javier) with ESMTPSA id 83208601AB1 From: Javier Martinez Canillas To: Mark Brown Cc: Kukjin Kim , Krzysztof Kozlowski , Olof Johansson , Doug Anderson , David Hendricks , linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Javier Martinez Canillas Subject: [RFC PATCH 1/4] spi: spidev: Add Google SPI flash compatible string Date: Tue, 19 May 2015 15:34:11 +0200 Message-Id: <1432042454-19234-2-git-send-email-javier.martinez@collabora.co.uk> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1432042454-19234-1-git-send-email-javier.martinez@collabora.co.uk> References: <1432042454-19234-1-git-send-email-javier.martinez@collabora.co.uk> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Google Chromebooks have a SPI flash that is used to store firmware and different system parameters and data (i.e: Google Binary Block flags). Since there isn't a driver for it yet, the spidev interface is used to access the flash from user-space (i.e: using the flashrom tool). Add a "google,spi-flash" compatible string so the Device Tree sources use it instead of the "spidev" compatible which does not describe the real HW and is just a Linux implementation detail. A generic "google,spi-flash" OF device ID is used instead of the actual vendor/model because these chips are commodity parts that are sourced from multiple vendors. So specifying the exact vendor and model in the DTS will add a maintenance burden with no real gain (the parts are 100% compatible anyways) and will likely result in it simply being wrong for a sizeable fraction of the machines. Also, it would require to duplicate a DTS since the machine is the same besides using a different SPI flash part. Signed-off-by: Javier Martinez Canillas --- drivers/spi/spidev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index dd616ff0ffc5..b18cf7bdc385 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -693,6 +693,7 @@ static struct class *spidev_class; #ifdef CONFIG_OF static const struct of_device_id spidev_dt_ids[] = { { .compatible = "rohm,dh2228fv" }, + { .compatible = "google,spi-flash" }, {}, }; MODULE_DEVICE_TABLE(of, spidev_dt_ids);