From patchwork Mon Jul 20 14:44:05 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 6828341 X-Patchwork-Delegate: agross@codeaurora.org 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 DB2A8C05AC for ; Mon, 20 Jul 2015 14:46:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D33112055A for ; Mon, 20 Jul 2015 14:46:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C74312047C for ; Mon, 20 Jul 2015 14:46:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756460AbbGTOoP (ORCPT ); Mon, 20 Jul 2015 10:44:15 -0400 Received: from mail-wi0-f182.google.com ([209.85.212.182]:36232 "EHLO mail-wi0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756666AbbGTOoL (ORCPT ); Mon, 20 Jul 2015 10:44:11 -0400 Received: by wicgb10 with SMTP id gb10so28791858wic.1 for ; Mon, 20 Jul 2015 07:44:10 -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=kiiaIVeUOJGrHbs4Sn8M4etQwRltQf7QblB4vTLRxNc=; b=egLQ1XERnIBXOdBDeayIn1NxjOOhq6z35f0VlGXHm+v+sqi5851m5OcFKk6AWg7hzi +Tedf3omlI0Vql69DEoNcN8Gp/JbfKfhJ3HV2Vn7Bk6mLy3HDFUHH9gAEaTTYTMwuMMj dQunmDahdakB4lKpNI7D0HncRdP0Z2gF39hTNEKkWQjHE3Hyvf52HRP/DSolZnFhO3a7 M3KxmqQy49FdtqnPD5SpT+xeZOr4IzPVMfP00N1TGe+4EGP7E1CbbUR6vXSQOio+lpS5 RsKyPzyOWKQRPjRvHF0TZGcjUJg3Bc5WHUEPL+s6jdvCryw3wkXGK4A5iKEntkI3/Pur Jg6A== X-Gm-Message-State: ALoCoQm065aKd700q+hcX3TLIEYl4VZP7mMi71tb8BiUeLjtpCaFApR+s3hJNXMkjgHdptEYysag X-Received: by 10.180.75.78 with SMTP id a14mr22221452wiw.43.1437403450040; Mon, 20 Jul 2015 07:44:10 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-78-144-121-210.as13285.net. [78.144.121.210]) by smtp.gmail.com with ESMTPSA id gb16sm12155132wic.5.2015.07.20.07.44.07 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 20 Jul 2015 07:44:09 -0700 (PDT) From: Srinivas Kandagatla To: 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 v8 6/9] nvmem: qfprom: Add Qualcomm QFPROM support. Date: Mon, 20 Jul 2015 15:44:05 +0100 Message-Id: <1437403445-4348-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1437403352-4091-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1437403352-4091-1-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=-8.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Reviewed-by: Stephen Boyd --- drivers/nvmem/Kconfig | 15 +++++++++ drivers/nvmem/Makefile | 4 +++ drivers/nvmem/qfprom.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 105 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..ba5e2b4 --- /dev/null +++ b/drivers/nvmem/qfprom.c @@ -0,0 +1,86 @@ +/* + * 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 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");