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: 111454 Delivered-To: patch@linaro.org Received: by 10.140.95.112 with SMTP id h103csp210973qge; Thu, 31 Aug 2017 16:21:18 -0700 (PDT) X-Google-Smtp-Source: ADKCNb5Ki8eXznITTWUdxo+8zXx/K81+sMtacWT19S1xmG+LzPGp4JiKg9xV3H7GK2MEgvTD4I34 X-Received: by 10.84.131.67 with SMTP id 61mr124664pld.122.1504221677923; Thu, 31 Aug 2017 16:21:17 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1504221677; cv=none; d=google.com; s=arc-20160816; b=wAvERjEhly1N0qrbdPhzjJNqfnNjgEm0TBwBMyI8sKHZLYZC8ha8DuY6LvR0g16l0Y HaN87OCSSWxDgEOIZ8459ss+aflXKzvwwnsoY5aLUy55bp4Q1fIjzDc5Tb7ExakYw/nS nZaX6Bu5Xw37VdvSjozl4+ZsRh9R1XPBg0MLjW8Vwz9xnr8uboQLqRatigGUBw4WvvTX CNhfBUOR62nGRHK3oUYFyQq7zQGQBvEWpiEPmeJBpFN9Zsa5TcuVTyOfI/UlCh7kCckd MTo5pBHoWxyJJyS7fmOy1Sux5IBROd36LSowQx9fTTPK5NzfW6n24f9eoPOMHDxKzw+c xK7g== 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=yhYQeEtNjRv7O4llVobkdS7OWYTbs654Ky+KwYrooeI=; b=iDXDPPiQ9ORNmN+AUa/QFlDGW/W3Xd9RBoyqdAkhNHe9eDe++LA+ClEDBvic5MKaxf OiKNGvHbSBGa6EwWw6ltPJ/MqmjXxN+Jr7DrZ1UcOAe9Z73dPAhlm/AcTbGlQMqMPtfu kBkPQHod9sgEyKSgJ1udnioFD6XKD3GbyKlSBFPrGpggBXsBHAN4mu7pWAFj07vDTlFQ +5K35PUSJYiO1UluljIK/azp3vq83Rbw8UQlu77TxznPSk7DAvVkpQrr3nN+4pmXvIa5 QcPSi0hdOlI7SzFyP1Z/p7LEKRH2rdXt9j2rJsdD9laChpLw1NmdrwO1TFdbLMFqdFMg 9jOA== 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 o19si660959pgn.264.2017.08.31.16.21.17; Thu, 31 Aug 2017 16:21:17 -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 S1751956AbdHaXVQ (ORCPT + 26 others); Thu, 31 Aug 2017 19:21:16 -0400 Received: from mx.socionext.com ([202.248.49.38]:31256 "EHLO mx.socionext.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751336AbdHaXUZ (ORCPT ); Thu, 31 Aug 2017 19:20:25 -0400 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 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 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> 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 --- 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 -- 2.7.4 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");