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: 6004011 Return-Path: X-Original-To: patchwork-linux-arm@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 0515BBF90F for ; Fri, 13 Mar 2015 09:55:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1E0D3202AE for ; Fri, 13 Mar 2015 09:55:37 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2E1082025A for ; Fri, 13 Mar 2015 09:55:36 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YWMHQ-0002NI-Mz; Fri, 13 Mar 2015 09:53:20 +0000 Received: from mail-wi0-f174.google.com ([209.85.212.174]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YWMFO-0000fZ-C8 for linux-arm-kernel@lists.infradead.org; Fri, 13 Mar 2015 09:51:15 +0000 Received: by wivr20 with SMTP id r20so4489001wiv.3 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=GrXLrOHJnDECu3O3Ar4JQhK6cZEKXLNP8nDje0tPeOKgCc7nnUjF+d9gKZafKT52A9 oSnSZf/hQrN1KtBmjvUDDOni3laIiLd6ha6IhehfJcL63aXN+TzDfhfKrj9PpwMTpNPH 7FoxB6V5GWhtOH7K3tpcM6lRPzUXm5M/7sSMOHEm6ZV/kwFJN4UQ7ah13EHbQzNz0tEI Q1Mmd0s0EcPpioSTPlvJOYUvJEyVRoQDlz95mWHPKjrTs8dm3CR1VPXaEB70mOaXyqfG Dq7P5oDDW6lwi5o20UukYd/zcLRl7FSHrR9vD+B/pY3dmqc2/3mwCzowV0pJwvIqbYZT 6Htw== X-Gm-Message-State: ALoCoQneZap7QH3VOudLKMQ2dvAe8dyv/8wI4zqYwKUu21/YVW5G+jMGt7bnIGrU6nyhmNyeU9fg 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 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150313_025114_601074_BDC0D7BC X-CRM114-Status: GOOD ( 16.07 ) X-Spam-Score: -0.7 (/) Cc: devicetree@vger.kernel.org, Arnd Bergmann , Pawel Moll , Greg Kroah-Hartman , linux-api@vger.kernel.org, broonie@kernel.org, Stephen Boyd , linux-kernel@vger.kernel.org, Rob Herring , Srinivas Kandagatla , Kumar Gala , Maxime Ripard , linux-arm-msm@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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");