From patchwork Thu Mar 5 09:46:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 5944401 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id AADF99F318 for ; Thu, 5 Mar 2015 09:49:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CB5092037B for ; Thu, 5 Mar 2015 09:49:21 +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 E61CC201BB for ; Thu, 5 Mar 2015 09:49:20 +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 1YTSNV-0006sg-Ke; Thu, 05 Mar 2015 09:47:37 +0000 Received: from mail-we0-f174.google.com ([74.125.82.174]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YTSMj-0006Dm-T1 for linux-arm-kernel@lists.infradead.org; Thu, 05 Mar 2015 09:46:50 +0000 Received: by wesu56 with SMTP id u56so51760508wes.10 for ; Thu, 05 Mar 2015 01:46:27 -0800 (PST) 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=Ngk853yJPFLV1v9loqvBYEozVwdipA+NkKaPqv9tJUo=; b=FPVyXqUNG3PSISwnCL5SQzASPhfvZCqjvdkuzJ8qWfc2hqmbIcFE7js4sUVqhydVIN IwtCzkiF57Q1BsY7Rg4NJ5/SYnF1TaVGOlXNSnmnfzSAh1xTc83Jo6tZzCzpv+VjgAFR DMk7LHC2poZatRCZizWmjFQ5SAuk1Y2xm82jbBLCOjRE8Nc+OaMa81Aig6/oGf9SuvIW AnxKKnb8JNBrOfRRcVHeG8tpe7IG4zbvyK6zbXFo9ConiWxXiPcUeQN1f+7vdauj7IfF aQOqnZ4MWpivwxPUEPVkLljyRKrhG8dblb6CASccxKkYAMlVtPWBPXqHLqs4xlCdJ03m mDew== X-Gm-Message-State: ALoCoQnIjgWCswBY4UT5CuCD/h+e1wVI5cifdWKxKUlVSYOGlt9n59aBUZYr/2P7aJtnnbPU7ARW X-Received: by 10.180.89.173 with SMTP id bp13mr20775522wib.88.1425548787620; Thu, 05 Mar 2015 01:46:27 -0800 (PST) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-89-242-228-249.as13285.net. [89.242.228.249]) by mx.google.com with ESMTPSA id ge8sm9692749wjc.32.2015.03.05.01.46.25 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 05 Mar 2015 01:46:26 -0800 (PST) From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v1 5/6] eeprom: qfprom: Add Qualcomm QFPROM support. Date: Thu, 5 Mar 2015 09:46:23 +0000 Message-Id: <1425548783-13110-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1425548685-12887-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1425548685-12887-1-git-send-email-srinivas.kandagatla@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150305_014650_120270_F3B59229 X-CRM114-Status: GOOD ( 14.91 ) X-Spam-Score: -0.7 (/) Cc: devicetree@vger.kernel.org, Arnd Bergmann , Pawel Moll , andrew@lunn.ch, linux-api@vger.kernel.org, broonie@kernel.org, Stephen Boyd , linux-kernel@vger.kernel.org, Rob Herring , Greg Kroah-Hartman , Kumar Gala , Srinivas Kandagatla , Maxime Ripard 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 | 7 +++++ drivers/eeprom/Makefile | 1 + drivers/eeprom/qfprom.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 82 insertions(+) create mode 100644 drivers/eeprom/qfprom.c diff --git a/drivers/eeprom/Kconfig b/drivers/eeprom/Kconfig index bff8ecb..65325c7 100644 --- a/drivers/eeprom/Kconfig +++ b/drivers/eeprom/Kconfig @@ -28,4 +28,11 @@ config EEPROM_SUNXI_SID This driver can also be built as a module. If so, the module will be called sunxi_sid. +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 661422c..f99c824 100644 --- a/drivers/eeprom/Makefile +++ b/drivers/eeprom/Makefile @@ -8,3 +8,4 @@ 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..371a8c0 --- /dev/null +++ b/drivers/eeprom/qfprom.c @@ -0,0 +1,74 @@ +#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("GPL2");