From patchwork Thu May 21 16:44:25 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 6457591 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 A07BAC0020 for ; Thu, 21 May 2015 16:46:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A5B752015A for ; Thu, 21 May 2015 16:46:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D60D20495 for ; Thu, 21 May 2015 16:46:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756870AbbEUQof (ORCPT ); Thu, 21 May 2015 12:44:35 -0400 Received: from mail-wi0-f180.google.com ([209.85.212.180]:33603 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755699AbbEUQob (ORCPT ); Thu, 21 May 2015 12:44:31 -0400 Received: by wicmx19 with SMTP id mx19so18581814wic.0 for ; Thu, 21 May 2015 09:44:30 -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=QlMv+7lJIDXqtLO/BHSHYDTOXG5dP0RJ1Bjj/N3R518=; b=mDlEgneZel1dnfWHAssbyskkUBoG+1PWEJ+IOhPutANqF4tcAUy1LJEuniYwwK7jWb GjmRS8xgSkxYT4yEdjKcnJ0Jqf7wzSNwJN3xFPQENq1T/nQvuxFGwastkZaA9pjC1DDf ZXRHlXP2v54cS8r8gV5UVZ4exjRPD7dG1F+0FEzTFDe/jQi4Y4lPOmIyP9aHJu1ZavzJ vbj3816DGpFphhei1i6BM0PUah/yCFZaiIvPjlVc16OGplOkc3hRunMlqRRsiC5/YN1q q/srf7nYiwgSXzryANMxxedaDDODAmgAj0SmbilxDO2/GZI5R3rDcDZ9aJDVf3Y/GLQv EPVg== X-Gm-Message-State: ALoCoQmi4l4QlS97MStbW8ZOwSvuvFJYkjh5GfOgOGtmTPDy694HG4L0t7qsxQ9VtbYi1+I6qsiU X-Received: by 10.180.106.70 with SMTP id gs6mr52371958wib.36.1432226670638; Thu, 21 May 2015 09:44:30 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-2-96-95-164.as13285.net. [2.96.95.164]) by mx.google.com with ESMTPSA id fw3sm3675901wic.13.2015.05.21.09.44.27 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 21 May 2015 09:44:29 -0700 (PDT) From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org Cc: Maxime Ripard , Rob Herring , Kumar Gala , Mark Brown , s.hauer@pengutronix.de, Greg Kroah-Hartman , 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, Srinivas Kandagatla , pantelis.antoniou@konsulko.com, mporter@konsulko.com Subject: [PATCH v5 07/11] nvmem: Add simple nvmem-mmio consumer helper functions. Date: Thu, 21 May 2015 17:44:25 +0100 Message-Id: <1432226665-8994-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1432226535-8640-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1432226535-8640-1-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=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 probe and remove helper functions for nvmems which are mmio based, With these helper function new nvmem consumer drivers need very little code add its driver. This code is currently used for qfprom and sunxi-sid nvmem consumer drivers. Signed-off-by: Srinivas Kandagatla --- drivers/nvmem/Makefile | 1 + drivers/nvmem/nvmem-mmio.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++ drivers/nvmem/nvmem-mmio.h | 41 +++++++++++++++++++++++++++ 3 files changed, 111 insertions(+) create mode 100644 drivers/nvmem/nvmem-mmio.c create mode 100644 drivers/nvmem/nvmem-mmio.h diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 6df2c69..f694cfc 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_NVMEM) += nvmem_core.o nvmem_core-y := core.o +nvmem_core-y += nvmem-mmio.o diff --git a/drivers/nvmem/nvmem-mmio.c b/drivers/nvmem/nvmem-mmio.c new file mode 100644 index 0000000..0d8131f --- /dev/null +++ b/drivers/nvmem/nvmem-mmio.c @@ -0,0 +1,69 @@ +/* + * 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 "nvmem-mmio.h" + +int nvmem_mmio_remove(struct platform_device *pdev) +{ + struct nvmem_device *nvmem = platform_get_drvdata(pdev); + + return nvmem_unregister(nvmem); +} +EXPORT_SYMBOL_GPL(nvmem_mmio_remove); + +int nvmem_mmio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + const struct nvmem_mmio_data *data; + struct nvmem_device *nvmem; + struct regmap *regmap; + const struct of_device_id *match; + void __iomem *base; + + if (!dev || !dev->driver) + return -ENODEV; + + match = of_match_device(dev->driver->of_match_table, dev); + if (!match || !match->data) + return -EINVAL; + + data = match->data; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + data->regmap_config->max_register = resource_size(res) - 1; + + regmap = devm_regmap_init_mmio(dev, base, data->regmap_config); + if (IS_ERR(regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(regmap); + } + data->nvmem_config->dev = dev; + nvmem = nvmem_register(data->nvmem_config); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); + + platform_set_drvdata(pdev, nvmem); + + return 0; +} +EXPORT_SYMBOL_GPL(nvmem_mmio_probe); diff --git a/drivers/nvmem/nvmem-mmio.h b/drivers/nvmem/nvmem-mmio.h new file mode 100644 index 0000000..a2ad4e5 --- /dev/null +++ b/drivers/nvmem/nvmem-mmio.h @@ -0,0 +1,41 @@ +/* + * MMIO based nvmem providers. + * + * Copyright (C) 2015 Srinivas Kandagatla + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef _LINUX_NVMEM_MMIO_H +#define _LINUX_NVMEM_MMIO_H + +#include +#include +#include + +struct nvmem_mmio_data { + struct regmap_config *regmap_config; + struct nvmem_config *nvmem_config; +}; + +#if IS_ENABLED(CONFIG_NVMEM) + +int nvmem_mmio_probe(struct platform_device *pdev); +int nvmem_mmio_remove(struct platform_device *pdev); + +#else + +static inline int nvmem_mmio_probe(struct platform_device *pdev) +{ + return -ENOSYS; +} + +static inline int nvmem_mmio_remove(struct platform_device *pdev) +{ + return -ENOSYS; +} +#endif + +#endif /* ifndef _LINUX_NVMEM_MMIO_H */