From patchwork Fri Mar 13 09:50:45 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 6003911 Return-Path: X-Original-To: patchwork-linux-arm-msm@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 1C6DDBF90F for ; Fri, 13 Mar 2015 09:51:49 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 320E2202AE for ; Fri, 13 Mar 2015 09:51:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B3B18202BE for ; Fri, 13 Mar 2015 09:51:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754472AbbCMJu6 (ORCPT ); Fri, 13 Mar 2015 05:50:58 -0400 Received: from mail-wi0-f169.google.com ([209.85.212.169]:40775 "EHLO mail-wi0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754463AbbCMJuw (ORCPT ); Fri, 13 Mar 2015 05:50:52 -0400 Received: by wivr20 with SMTP id r20so4630208wiv.5 for ; Fri, 13 Mar 2015 02:50:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=0+riFAee8JYEq15McMSS/j8LuVE8YypqqrkdlrFr9Io=; b=J+e1/KcQm2yif2Tuoe6hCVBsTueXEFn0QFexDlgcozy1i5WQRicSPn9Uk8aTPzVr6Q 95mjKfRmQgORbb7q+jhy5dfX5XZz7Yirwn1Neqpc2AF0WcbMArGysshO3RKbhV2qKcTn KO3IlI2cXYrkyZ25eGVo24HG3i+NN7mKidhns1ksvgp0uyD9yhvqrBAh9vdUSRGqhgck D/POdua2pdwylYZXhB8P6gJYsTf8EAgfqhVb5KLHWLTB0YOSvp8nMOBwhylu7nHVyYLc MUG1zHpnoq/07U25i7YQzAO0xOMblFx0OuzPJG4ReHgm2O0I4grLOYzxGqhK3W44ydRB VKmQ== X-Gm-Message-State: ALoCoQkLKZc8Mic9edN3kNXYs3cLHdV6UewOpSM9dT/50n36MSE2T1NJY19yxbaJEFXJP+iAeA8a X-Received: by 10.194.171.100 with SMTP id at4mr71526166wjc.122.1426240251627; Fri, 13 Mar 2015 02:50:51 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-2-99-228-8.as13285.net. [2.99.228.8]) by mx.google.com with ESMTPSA id fy2sm2046767wic.15.2015.03.13.02.50.47 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 13 Mar 2015 02:50:50 -0700 (PDT) From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org Cc: Maxime Ripard , Rob Herring , Pawel Moll , Kumar Gala , linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Stephen Boyd , Arnd Bergmann , broonie@kernel.org, Greg Kroah-Hartman , linux-arm-msm@vger.kernel.org, Srinivas Kandagatla Subject: [PATCH v2 5/7] eeprom: qfprom: Add Qualcomm QFPROM support. Date: Fri, 13 Mar 2015 09:50:45 +0000 Message-Id: <1426240245-2621-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1426240157-2383-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1426240157-2383-1-git-send-email-srinivas.kandagatla@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 This patch adds QFPROM support driver which is used by other drivers like thermal sensor and cpufreq. On MSM parts there are some efuses (called qfprom) these fuses store things like calibration data, speed bins.. etc. Drivers like cpufreq, thermal sensors would read out this data for configuring the driver. Signed-off-by: Srinivas Kandagatla --- drivers/eeprom/Kconfig | 9 ++++- drivers/eeprom/Makefile | 1 + drivers/eeprom/qfprom.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 96 insertions(+), 1 deletion(-) create mode 100644 drivers/eeprom/qfprom.c diff --git a/drivers/eeprom/Kconfig b/drivers/eeprom/Kconfig index fd4fa2f..b77828b 100644 --- a/drivers/eeprom/Kconfig +++ b/drivers/eeprom/Kconfig @@ -23,4 +23,11 @@ config EEPROM_SUNXI_SID This driver can also be built as a module. If so, the module will be called eprom-sunxi-sid. -endif \ No newline at end of file +config QCOM_QFPROM + tristate "QCOM QFPROM Support" + depends on EEPROM + select REGMAP_MMIO + help + Say y here to enable QFPROM support. The QFPROM provides access + functions for QFPROM data to rest of the drivers via eeprom interface. +endif diff --git a/drivers/eeprom/Makefile b/drivers/eeprom/Makefile index 546a27c..9c1bb03 100644 --- a/drivers/eeprom/Makefile +++ b/drivers/eeprom/Makefile @@ -6,3 +6,4 @@ obj-$(CONFIG_EEPROM) += core.o # Devices obj-$(CONFIG_EEPROM_SUNXI_SID) += eeprom-sunxi-sid.o +obj-$(CONFIG_QCOM_QFPROM) += qfprom.o diff --git a/drivers/eeprom/qfprom.c b/drivers/eeprom/qfprom.c new file mode 100644 index 0000000..7d9e5e9 --- /dev/null +++ b/drivers/eeprom/qfprom.c @@ -0,0 +1,87 @@ +/* + * Copyright (C) 2015 Srinivas Kandagatla + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include + +static struct regmap_config qfprom_regmap_config = { + .reg_bits = 32, + .val_bits = 8, + .reg_stride = 1, +}; + +static struct eeprom_config econfig = { + .stride = 1, + .name = "qfprom", +}; + +static int qfprom_remove(struct platform_device *pdev) +{ + struct eeprom_device *eeprom = platform_get_drvdata(pdev); + + return eeprom_unregister(eeprom); +} + +static int qfprom_probe(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *base; + struct device *dev = &pdev->dev; + struct eeprom_device *eeprom; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + qfprom_regmap_config.max_register = resource_size(res) - 1; + + econfig.regmap = devm_regmap_init_mmio(dev, base, + &qfprom_regmap_config); + if (IS_ERR(econfig.regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(econfig.regmap); + } + econfig.owner = THIS_MODULE; + econfig.dev = dev; + econfig.size = resource_size(res) - 1; + eeprom = eeprom_register(&econfig); + if (IS_ERR(eeprom)) + return PTR_ERR(eeprom); + + platform_set_drvdata(pdev, eeprom); + return 0; +} + +static const struct of_device_id qfprom_of_match[] = { + { .compatible = "qcom,qfprom"}, + {/* sentinel */}, +}; +MODULE_DEVICE_TABLE(of, qfprom_of_match); + +static struct platform_driver qfprom_driver = { + .probe = qfprom_probe, + .remove = qfprom_remove, + .driver = { + .name = "qcom,qfprom", + .of_match_table = qfprom_of_match, + }, +}; +module_platform_driver(qfprom_driver); +MODULE_AUTHOR("Srinivas Kandagatla "); +MODULE_DESCRIPTION("Qualcomm QFPROM driver"); +MODULE_LICENSE("GPL v2");