From patchwork Mon Jun 22 23:09:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 6658311 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 664B49F1C1 for ; Mon, 22 Jun 2015 23:14:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6576F205B3 for ; Mon, 22 Jun 2015 23:14:45 +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 673EB205B1 for ; Mon, 22 Jun 2015 23:14:44 +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 1Z7AsX-0007P5-9F; Mon, 22 Jun 2015 23:11:49 +0000 Received: from mail-wi0-f178.google.com ([209.85.212.178]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Z7AqX-00053M-Ge for linux-arm-kernel@lists.infradead.org; Mon, 22 Jun 2015 23:09:46 +0000 Received: by wicgi11 with SMTP id gi11so521910wic.0 for ; Mon, 22 Jun 2015 16:09:23 -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=l3zan+MRldeWVMzTionmtM/q3KR4gqheeeX37/45K0w=; b=bbXO//KLOi2MN8z9FRxwuXTOAOLzP4taouws+S4UwCD65Rq/gtMc3GKuVs1o6mlfWa 5mgp5+3nkbbjn6OfjZ/VpgbQPFu3Ncbgp1NxgLH1Y/Eq5Ut++e/8FBGHbGgbOFMN+jUa lKJ8Ykbc0IH0z5MfUNLdTdQZcElzN9qH6YNOum4dTI51Mz/sFe1A29xvx+wD8SabQduC xs0lWxZ3oy0pFb+yoWPNMs6xYqep+DlRYCQ60petOmClNhw43Q/5gmsqiS6LvDBNxU99 ClyEfCM9jL6r5fMO3ru1aqOQMxt9FTgWzAmh48+n1N9BYDPwS0/VjXwg0g9khar8l/S3 1hHw== X-Gm-Message-State: ALoCoQm7nsVNCAfDMh+ui1pedLIm0JIAjdcvavARgBzd5hLZPujJtKmGQ+7VfwOLGmToSLBjV+0K X-Received: by 10.180.109.136 with SMTP id hs8mr35829357wib.73.1435014563835; Mon, 22 Jun 2015 16:09:23 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-2-98-208-65.as13285.net. [2.98.208.65]) by mx.google.com with ESMTPSA id k2sm3739197wif.4.2015.06.22.16.09.20 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 22 Jun 2015 16:09:23 -0700 (PDT) From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman Subject: [PATCH v6 6/9] nvmem: qfprom: Add Qualcomm QFPROM support. Date: Tue, 23 Jun 2015 00:09:16 +0100 Message-Id: <1435014556-26392-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1435014459-26138-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1435014459-26138-1-git-send-email-srinivas.kandagatla@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150622_160945_731720_A75BA108 X-CRM114-Status: GOOD ( 21.37 ) X-Spam-Score: -2.6 (--) Cc: stefan.wahren@i2se.com, devicetree@vger.kernel.org, arnd@arndb.de, linux-api@vger.kernel.org, s.hauer@pengutronix.de, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, pantelis.antoniou@konsulko.com, Rob Herring , Srinivas Kandagatla , Mark Brown , Kumar Gala , mporter@konsulko.com, Maxime Ripard , linux-arm-msm@vger.kernel.org, wxt@rock-chips.com 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=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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/nvmem/Kconfig | 15 +++++++++ drivers/nvmem/Makefile | 4 +++ drivers/nvmem/qfprom.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 drivers/nvmem/qfprom.c diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index f157b6d..7fff0e2 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -8,3 +8,18 @@ menuconfig NVMEM from both the Linux Kernel and the userspace. If unsure, say no. + +if NVMEM + +config QCOM_QFPROM + tristate "QCOM QFPROM Support" + depends on ARCH_QCOM || COMPILE_TEST + 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 nvmem interface. + + This driver can also be built as a module. If so, the module + will be called nvmem-qfprom. + +endif diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 6df2c69..ff44fe9 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -4,3 +4,7 @@ obj-$(CONFIG_NVMEM) += nvmem_core.o nvmem_core-y := core.o + +# Devices +obj-$(CONFIG_QCOM_QFPROM) += nvmem_qfprom.o +nvmem_qfprom-y := qfprom.o diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c new file mode 100644 index 0000000..7f7a82f --- /dev/null +++ b/drivers/nvmem/qfprom.c @@ -0,0 +1,89 @@ +/* + * 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 +#include +#include +#include + +static struct regmap_config qfprom_regmap_config = { + .reg_bits = 32, + .val_bits = 8, + .reg_stride = 1, +}; + +static struct nvmem_config econfig = { + .name = "qfprom", + .owner = THIS_MODULE, +}; + +static int qfprom_remove(struct platform_device *pdev) +{ + struct nvmem_device *nvmem = platform_get_drvdata(pdev); + + return nvmem_unregister(nvmem); +} + +static int qfprom_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + struct nvmem_device *nvmem; + struct regmap *regmap; + void __iomem *base; + + 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; + + regmap = devm_regmap_init_mmio(dev, base, &qfprom_regmap_config); + if (IS_ERR(regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(regmap); + } + econfig.dev = dev; + nvmem = nvmem_register(&econfig); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); + + platform_set_drvdata(pdev, nvmem); + + 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");