From patchwork Mon Jul 27 11:15:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 51508 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-wi0-f199.google.com (mail-wi0-f199.google.com [209.85.212.199]) by patches.linaro.org (Postfix) with ESMTPS id 3AFB9214B7 for ; Mon, 27 Jul 2015 11:16:36 +0000 (UTC) Received: by wixh2 with SMTP id h2sf27049272wix.0 for ; Mon, 27 Jul 2015 04:16:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:sender:precedence:list-id :x-original-sender:x-original-authentication-results:mailing-list :list-post:list-help:list-archive:list-unsubscribe; bh=r7PErastpLpRMMSqJj6bXmv2Fq87JRgBFeLEog7r4NI=; b=hqXZFx2mEgrK09hQWLhg1BzZ6CJK/4M+v55hHBDRMO6gWoOetT720HVn1cDGpo7aJH yLBW60rzq5ofKnp26VNPn9bRLDtvCL1AzIAE26cX48Ywr8RuTAm6RQGEgMISTHCyjRfT cBTx9wqyxh8qdFfBBgO0NhuL8JwMy/NWD7oZIej7sQY4kXpf1kQOQbfvGcZhlKGmGCOR QtXMlujnQkt5wTOK57bM1mzO8qlc0NUUNj3qABubjiV3Xea88L32VPdTmP6ubRHSksah +OsaySwSFcMWPqClxESBnaUWBmCJU06kyGR62R9JGzyhAui0EkE1F5fnpREwGijFgryp Xq3Q== X-Gm-Message-State: ALoCoQnNQ29wxEYot939iRgqXN2mJHdWtIwag+g3Bncygrs94x8tS5Rcqc08hj87zAGsdUWymJLJ X-Received: by 10.112.253.135 with SMTP id aa7mr11835882lbd.11.1437995795515; Mon, 27 Jul 2015 04:16:35 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.153.7.136 with SMTP id dc8ls697422lad.101.gmail; Mon, 27 Jul 2015 04:16:35 -0700 (PDT) X-Received: by 10.112.209.106 with SMTP id ml10mr26030647lbc.112.1437995795342; Mon, 27 Jul 2015 04:16:35 -0700 (PDT) Received: from mail-lb0-f181.google.com (mail-lb0-f181.google.com. [209.85.217.181]) by mx.google.com with ESMTPS id uo9si15008921lbb.12.2015.07.27.04.16.35 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 27 Jul 2015 04:16:35 -0700 (PDT) Received-SPF: pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.181 as permitted sender) client-ip=209.85.217.181; Received: by lbbqi7 with SMTP id qi7so50968381lbb.3 for ; Mon, 27 Jul 2015 04:16:35 -0700 (PDT) X-Received: by 10.152.36.102 with SMTP id p6mr26505503laj.19.1437995794970; Mon, 27 Jul 2015 04:16:34 -0700 (PDT) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patch@linaro.org Received: by 10.112.7.198 with SMTP id l6csp1465786lba; Mon, 27 Jul 2015 04:16:33 -0700 (PDT) X-Received: by 10.107.168.145 with SMTP id e17mr45723512ioj.112.1437995793189; Mon, 27 Jul 2015 04:16:33 -0700 (PDT) Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l14si14842325iod.135.2015.07.27.04.16.32; Mon, 27 Jul 2015 04:16:33 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753333AbbG0LQb (ORCPT + 28 others); Mon, 27 Jul 2015 07:16:31 -0400 Received: from mail-wi0-f171.google.com ([209.85.212.171]:38542 "EHLO mail-wi0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751632AbbG0LQ2 (ORCPT ); Mon, 27 Jul 2015 07:16:28 -0400 Received: by wibxm9 with SMTP id xm9so111520036wib.1 for ; Mon, 27 Jul 2015 04:16:27 -0700 (PDT) X-Received: by 10.180.11.194 with SMTP id s2mr12507826wib.33.1437995787266; Mon, 27 Jul 2015 04:16:27 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-78-147-3-201.as13285.net. [78.147.3.201]) by smtp.gmail.com with ESMTPSA id pf4sm27326073wjb.23.2015.07.27.04.16.24 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 27 Jul 2015 04:16:26 -0700 (PDT) From: Srinivas Kandagatla To: khilman@kernel.org, linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman Cc: Rob Herring , Mark Brown , s.hauer@pengutronix.de, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, arnd@arndb.de, sboyd@codeaurora.org, pantelis.antoniou@konsulko.com, mporter@konsulko.com, stefan.wahren@i2se.com, wxt@rock-chips.com, Srinivas Kandagatla Subject: [PATCH v9 6/9] nvmem: qfprom: Add Qualcomm QFPROM support. Date: Mon, 27 Jul 2015 12:15:00 +0100 Message-Id: <1437995700-11596-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1437995567-11203-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1437995567-11203-1-git-send-email-srinivas.kandagatla@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: srinivas.kandagatla@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.181 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , 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 Reviewed-by: Stephen Boyd --- drivers/nvmem/Kconfig | 15 +++++++++ drivers/nvmem/Makefile | 4 +++ drivers/nvmem/qfprom.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 104 insertions(+) create mode 100644 drivers/nvmem/qfprom.c diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index de90c82..fa85805 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -11,3 +11,18 @@ menuconfig NVMEM will be called nvmem_core. 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..afb67e7 --- /dev/null +++ b/drivers/nvmem/qfprom.c @@ -0,0 +1,85 @@ +/* + * 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 + +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");