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: 6457711 Return-Path: X-Original-To: patchwork-linux-arm@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 C69CCC0020 for ; Thu, 21 May 2015 16:48:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3992120497 for ; Thu, 21 May 2015 16:48:43 +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 A8B51203B7 for ; Thu, 21 May 2015 16:48:40 +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 1YvTbg-0005Rh-4C; Thu, 21 May 2015 16:46:04 +0000 Received: from mail-wg0-f47.google.com ([74.125.82.47]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YvTaU-0003VW-HA for linux-arm-kernel@lists.infradead.org; Thu, 21 May 2015 16:44:51 +0000 Received: by wghq2 with SMTP id q2so91566895wgh.1 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=EuznXuWbVb2y/2LNfdnkIlLCwrwnd59/CVKMqRXuGjW5GLK7V44sHcXWf/Gt/FakYg SBwOZQdUnbIlJ3qiiGQhGTK9zEtFOw3QQZWaYSGR4POVWQ2RmgKe0wOY+fQbPeuzFeEA 1324bBhJEyD6iunjyKXbE1uayEggViuSgv8ryV9zU3QF4riOtZs3OYpZa9TpX4kQc0SD Bi/YpwfLV7z7bKHid3MRWDEZsJ+FQTJAe4qVtKYUuBmYLnNCMk80JhByqHZ6+R9MOs+y q75ESZDbC3n0JQomwGPuPtjKO5AmkMlL1SYeA+7R7l8X5M/I5nl4s6YDsNP0aW3/5pHg Mk3A== X-Gm-Message-State: ALoCoQnK5nYX5tZSaPClP9WX5uG+UvnZTihcxzjm5Xjh7Q44tLkd8D3J0M89iixXaQ/pM3gCKStf 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 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150521_094450_764350_0E103FD8 X-CRM114-Status: GOOD ( 15.00 ) X-Spam-Score: -0.7 (/) Cc: devicetree@vger.kernel.org, arnd@arndb.de, Greg Kroah-Hartman , 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-api@vger.kernel.org, linux-arm-msm@vger.kernel.org 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 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 */