From patchwork Thu Aug 31 23:20:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keiji Hayashibara X-Patchwork-Id: 9933011 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F13C06022E for ; Thu, 31 Aug 2017 23:22:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E5056207A7 for ; Thu, 31 Aug 2017 23:22:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D9A7D26CFC; Thu, 31 Aug 2017 23:22:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5A33B207A7 for ; Thu, 31 Aug 2017 23:22:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=IMTC+7uHmllsxqIJrXMBh4ojTAywb6x3d4qz75USSwk=; b=uLxZjqvri+G2nxP8/MITXmBHLr Awo7aTCxhflOYW+ASdYrmwT0RnCZM9ScY6pm0s3Od972wwucP6JMaxSTjmQd81fdmuhM9os5X6QC5 HwG8cZ9uBs+2iLYkWOhW056baFZkyRY45v7ks40M8Ddf7qWZKQwPgalebL8HiOIs7dbdCwcfkV6zQ CSQmX99OPNPAP5NwqbHhE9Nh1pMSmuZZgex24tkv33zRjVmEXkJe7Qhcjh/bx0f/s1NZeExnpd+l7 PQo1cO653QXh6anLHoY3Dx+acfNloq8bl59FZ6h2aoREnXE1mcLoREhlcg7o5bgytg9DjvGvpYkT6 Z4/IyhVw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dnYnA-0004dT-BY; Thu, 31 Aug 2017 23:22:32 +0000 Received: from mx.socionext.com ([202.248.49.38]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dnYlW-0003eB-CQ for linux-arm-kernel@lists.infradead.org; Thu, 31 Aug 2017 23:20:52 +0000 Received: from unknown (HELO iyokan-ex.css.socionext.com) ([172.31.9.54]) by mx.socionext.com with ESMTP; 01 Sep 2017 08:20:23 +0900 Received: from mail.mfilter.local (unknown [10.213.24.62]) by iyokan-ex.css.socionext.com (Postfix) with ESMTP id 8583F610C6; Fri, 1 Sep 2017 08:20:23 +0900 (JST) Received: from 172.31.9.51 (172.31.9.51) by m-FILTER with ESMTP; Fri, 1 Sep 2017 08:20:23 +0900 Received: from plum.e01.socionext.com (unknown [10.213.132.32]) by kinkan.css.socionext.com (Postfix) with ESMTP id DC30C1A0E16; Fri, 1 Sep 2017 08:20:22 +0900 (JST) From: Keiji Hayashibara To: srinivas.kandagatla@linaro.org Subject: [PATCH v1 2/3] nvmem: uniphier: add UniPhier eFuse driver Date: Fri, 1 Sep 2017 08:20:19 +0900 Message-Id: <1504221620-358-3-git-send-email-hayashibara.keiji@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1504221620-358-1-git-send-email-hayashibara.keiji@socionext.com> References: <1504221620-358-1-git-send-email-hayashibara.keiji@socionext.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170831_162050_560394_67C80AF6 X-CRM114-Status: GOOD ( 15.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, owada.kiyoshi@socionext.com, hayashi.kunihiko@socionext.com, masami.hiramatsu@linaro.org, yamada.masahiro@socionext.com, Keiji Hayashibara , linux-kernel@vger.kernel.org, jaswinder.singh@linaro.org, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- arch/arm64/configs/defconfig | 1 + drivers/nvmem/Kconfig | 11 +++++ drivers/nvmem/Makefile | 2 + drivers/nvmem/uniphier-efuse.c | 98 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 112 insertions(+) create mode 100644 drivers/nvmem/uniphier-efuse.c diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 6c7d147..5c38b4a 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -514,6 +514,7 @@ CONFIG_PHY_XGENE=y CONFIG_PHY_TEGRA_XUSB=y CONFIG_QCOM_L2_PMU=y CONFIG_QCOM_L3_PMU=y +CONFIG_UNIPHIER_EFUSE=y CONFIG_ARM_SCPI_PROTOCOL=y CONFIG_RASPBERRYPI_FIRMWARE=y CONFIG_EFI_CAPSULE_LOADER=y diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 101ced4..aaeaebe 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 OF && MFD_SYSCON + help + This is a simple drive 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..f5277c3 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..d553fa3 --- /dev/null +++ b/drivers/nvmem/uniphier-efuse.c @@ -0,0 +1,98 @@ +/* + * 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 +#include +#include + +#define UNIPHIER_EFUSE_WORD_SIZE 4 +#define UNIPHIER_EFUSE_STRIDE 4 + +static int uniphier_reg_read(void *context, + unsigned int offset, void *val, size_t bytes) +{ + int words = bytes / UNIPHIER_EFUSE_WORD_SIZE; + + return regmap_bulk_read(context, offset, val, words); +} + +static struct nvmem_config econfig = { + .name = "uniphier-efuse", + .owner = THIS_MODULE, + .read_only = true, + .reg_read = uniphier_reg_read, + .word_size = UNIPHIER_EFUSE_WORD_SIZE, + .stride = UNIPHIER_EFUSE_STRIDE, +}; + +static int uniphier_efuse_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct nvmem_device *nvmem; + struct regmap *regmap; + struct resource res; + int ret; + + ret = of_address_to_resource(dev->of_node, 0, &res); + if (ret) + return ret; + + regmap = syscon_node_to_regmap(dev->of_node); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + econfig.size = resource_size(&res); + econfig.priv = regmap; + 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");