From patchwork Tue Oct 17 04:41:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keiji Hayashibara X-Patchwork-Id: 116003 Delivered-To: patch@linaro.org Received: by 10.80.163.170 with SMTP id s39csp817931edb; Mon, 16 Oct 2017 21:42:25 -0700 (PDT) X-Google-Smtp-Source: AOwi7QDCDci7iqJ2vrkyCEsyUbnjyt3/ccIQpbL/Q6DlpEIeZA+2sN7ekAEzhfs6c3rJPzE8wu6z X-Received: by 10.84.246.203 with SMTP id j11mr10947214plt.122.1508215345559; Mon, 16 Oct 2017 21:42:25 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1508215345; cv=none; d=google.com; s=arc-20160816; b=wtqEZIZYLvtH0YiLJPTeVVHPTJNKTjWpC/dDs6k78/WKAgYg6895W477I+TF0p1vme NFwj1pepLT0J6ZjCBLyv8k38WDRqpmCagys8JJLuCkBWDwV6zCJQHvJgN9QDljMAzYgh ciflPSd3+yh1AnVDkO7imEhVGGNKFbBtIVrOrup8vu+EMKNqBybaf+0Bzef4uiPIrSrx KeW9spd75Po9g5zwjQiFjvSktgWJ5vM8ibfydJzKXpBYV6BHacbCVuYw11bXP7FttJf6 ZmiTcAGU6KPgndQvNNCpRuhOJMA9IB1e8tUrmClQklqkSxRLN4f3KRWTKlhTVCtIZL8s RxQw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=xUI1L7JuC597HNSK0qdji5EQwGIT/N3eseEbmTGSlzw=; b=C2+lrv+GKD+tKZQQIXvMQz7aRCl52+QzxyRtZHH9g9b1CrqCU1eB00ecG4mlOevCZ/ 5V+PO4pIcOWkKDb5NzXZQ7Cv9aSBkvyFqr3ARXyvSRjPknLIopEEV4B0b823EoQsij5A pjKVfOKltFJgLJpDzCu2b6QKqCScCThgskTg7GyJrZ6hGFOlEXmQgugmvu00BqiA9M9B VY+NPKpJdIw38aAMYzMUq8Nc/fKc6eREaY/ft/N1PkbUd8YUliCki68o+Js2QgI6hbmL T2YMUw7BoCRe7Qv7LhNQy76sj/pMSIDQhVjnKGrR+ZSZUmEOG/3oOOEM2MepCS6/5FJm TwoQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id d2si4962822pge.141.2017.10.16.21.42.25; Mon, 16 Oct 2017 21:42:25 -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; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932355AbdJQEmW (ORCPT + 27 others); Tue, 17 Oct 2017 00:42:22 -0400 Received: from mx.socionext.com ([202.248.49.38]:53911 "EHLO mx.socionext.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753083AbdJQElv (ORCPT ); Tue, 17 Oct 2017 00:41:51 -0400 Received: from unknown (HELO iyokan-ex.css.socionext.com) ([172.31.9.54]) by mx.socionext.com with ESMTP; 17 Oct 2017 13:41:50 +0900 Received: from mail.mfilter.local (unknown [10.213.24.62]) by iyokan-ex.css.socionext.com (Postfix) with ESMTP id 2B11861128; Tue, 17 Oct 2017 13:41:50 +0900 (JST) Received: from 172.31.9.51 (172.31.9.51) by m-FILTER with ESMTP; Tue, 17 Oct 2017 13:41:50 +0900 Received: from plum.e01.socionext.com (unknown [10.213.132.32]) by kinkan.css.socionext.com (Postfix) with ESMTP id 91F2B1A0E17; Tue, 17 Oct 2017 13:41:49 +0900 (JST) From: Keiji Hayashibara To: srinivas.kandagatla@linaro.org Cc: robh+dt@kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, masami.hiramatsu@linaro.org, jaswinder.singh@linaro.org, yamada.masahiro@socionext.com, hayashi.kunihiko@socionext.com, owada.kiyoshi@socionext.com, Keiji Hayashibara Subject: [PATCH v3 2/3] nvmem: uniphier: add UniPhier eFuse driver Date: Tue, 17 Oct 2017 13:41:03 +0900 Message-Id: <1508215264-3745-3-git-send-email-hayashibara.keiji@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1508215264-3745-1-git-send-email-hayashibara.keiji@socionext.com> References: <1508215264-3745-1-git-send-email-hayashibara.keiji@socionext.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add eFuse driver for Socionext UniPhier series SoC. Note that eFuse device is under soc-glue and this register implements as read only. Signed-off-by: Keiji Hayashibara --- drivers/nvmem/Kconfig | 11 +++++ drivers/nvmem/Makefile | 2 + drivers/nvmem/uniphier-efuse.c | 97 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 110 insertions(+) create mode 100644 drivers/nvmem/uniphier-efuse.c -- 2.7.4 diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 101ced4..9c32cfe 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -123,6 +123,17 @@ config NVMEM_SUNXI_SID This driver can also be built as a module. If so, the module will be called nvmem_sunxi_sid. +config UNIPHIER_EFUSE + tristate "UniPhier SoCs eFuse support" + depends on ARCH_UNIPHIER || COMPILE_TEST + depends on HAS_IOMEM + help + This is a simple driver to dump specified values of UniPhier SoC + from eFuse. + + This driver can also be built as a module. If so, the module + will be called nvmem-uniphier-efuse. + config NVMEM_VF610_OCOTP tristate "VF610 SoC OCOTP support" depends on SOC_VF610 || COMPILE_TEST diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 1731406..2d07162 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -26,6 +26,8 @@ obj-$(CONFIG_ROCKCHIP_EFUSE) += nvmem_rockchip_efuse.o nvmem_rockchip_efuse-y := rockchip-efuse.o obj-$(CONFIG_NVMEM_SUNXI_SID) += nvmem_sunxi_sid.o nvmem_sunxi_sid-y := sunxi_sid.o +obj-$(CONFIG_UNIPHIER_EFUSE) += nvmem-uniphier-efuse.o +nvmem-uniphier-efuse-y := uniphier-efuse.o obj-$(CONFIG_NVMEM_VF610_OCOTP) += nvmem-vf610-ocotp.o nvmem-vf610-ocotp-y := vf610-ocotp.o obj-$(CONFIG_MESON_EFUSE) += nvmem_meson_efuse.o diff --git a/drivers/nvmem/uniphier-efuse.c b/drivers/nvmem/uniphier-efuse.c new file mode 100644 index 0000000..2bb45c4 --- /dev/null +++ b/drivers/nvmem/uniphier-efuse.c @@ -0,0 +1,97 @@ +/* + * UniPhier eFuse driver + * + * Copyright (C) 2017 Socionext Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License 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 + +struct uniphier_efuse_priv { + void __iomem *base; +}; + +static int uniphier_reg_read(void *context, + unsigned int reg, void *_val, size_t bytes) +{ + struct uniphier_efuse_priv *priv = context; + u32 *val = _val; + int offs; + + for (offs = 0; offs < bytes; offs += sizeof(u32)) + *val++ = readl(priv->base + reg + offs); + + return 0; +} + +static int uniphier_efuse_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + struct nvmem_device *nvmem; + struct nvmem_config econfig ={}; + struct uniphier_efuse_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->base = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + econfig.stride = 4; + econfig.word_size = 4; + econfig.read_only = true; + econfig.reg_read = uniphier_reg_read; + econfig.size = resource_size(res); + econfig.priv = priv; + econfig.dev = dev; + nvmem = nvmem_register(&econfig); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); + + platform_set_drvdata(pdev, nvmem); + + return 0; +} + +static int uniphier_efuse_remove(struct platform_device *pdev) +{ + struct nvmem_device *nvmem = platform_get_drvdata(pdev); + + return nvmem_unregister(nvmem); +} + +static const struct of_device_id uniphier_efuse_of_match[] = { + { .compatible = "socionext,uniphier-efuse",}, + {/* sentinel */}, +}; +MODULE_DEVICE_TABLE(of, uniphier_efuse_of_match); + +static struct platform_driver uniphier_efuse_driver = { + .probe = uniphier_efuse_probe, + .remove = uniphier_efuse_remove, + .driver = { + .name = "uniphier-efuse", + .of_match_table = uniphier_efuse_of_match, + }, +}; +module_platform_driver(uniphier_efuse_driver); + +MODULE_AUTHOR("Keiji Hayashibara "); +MODULE_DESCRIPTION("UniPhier eFuse driver"); +MODULE_LICENSE("GPL v2");