From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 303443E714A; Mon, 4 May 2026 18:24:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777919099; cv=none; b=n2+8YMT97FRKcMiTewwOY9vP5od2KAmoMy2GrxEDQtZQ3LaFxWv7VXDZXUopLlUO8jgodOhCy9CJ9tgFfJO7ryTkrLqWXb7UhfTbWfwz57bcAVys4IJNinF8G0QN5s6cnyZl7xcRPe5yGvhVLVbgAEujYkaThlZL2wngbltOVms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777919099; c=relaxed/simple; bh=SFyDTRyWZjDxmsFtAqwCPfeazjDIIWp9P+6ztku6jaM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=M2vo431KEZHPwijiGwT9e0lFyShE2JDNMm/UQVkCLvstU4HpiizqkOJY+lvYEkhh75+1ss/oMtqfoOsW4d0m4cy6IP3Xk5W+kEo9R1n6NqiuFAABi/rl6/ZdeRtLu4Ka60RyU9WGxaITarr+xSG+K1JM4sf2OEETtEVyfrYI90k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=s2UAt5ov; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="s2UAt5ov" Received: by smtp.kernel.org (Postfix) with ESMTPS id D0621C2BCFF; Mon, 4 May 2026 18:24:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777919098; bh=SFyDTRyWZjDxmsFtAqwCPfeazjDIIWp9P+6ztku6jaM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=s2UAt5ovqGlDNFbvBTOq9Ul3dNhnc8+V4nJQ46Am+zdgmiXhdKT+g0jZ0Q8ix3IZj O2/VeKbMqjR3qc7N/pLMAiC2vLZfx7v8A1TDWEPO7mzEnMe6iuLR7Z4bt08xQVfoqx +g47+4YP6+SaIvYJik8QeCbV86R+KhJVsfZ3acj9IqauGEuo4Cay6pSTSurvHmG4B9 QQeAEpk0E8PmMKb919W7ExNurr5gq0+GVF3tu4NTCGHVbztRVypUfhSjcX5p9Ep2rv HV/8B4b4aqHbekZ7A70x8he6Tad6ccU5VeYc2vGLY+ywBYgrIP3JgX8TRtqqoz+iFt l14GrneLJz23A== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5DBDCD3427; Mon, 4 May 2026 18:24:58 +0000 (UTC) From: Roman Vivchar via B4 Relay Date: Mon, 04 May 2026 21:24:57 +0300 Subject: [PATCH 05/13] nvmem: add mt6323 PMIC EFUSE driver Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260504-mt6323-v1-5-799b58b355ff@protonmail.com> References: <20260504-mt6323-v1-0-799b58b355ff@protonmail.com> In-Reply-To: <20260504-mt6323-v1-0-799b58b355ff@protonmail.com> To: Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Srinivas Kandagatla , "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Lee Jones Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-pm@vger.kernel.org, Ben Grisdale , Roman Vivchar X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777919095; l=4311; i=rva333@protonmail.com; s=20260325; h=from:subject:message-id; bh=1nnD8x2/YfoddlKavtCr39AhwjwKkPATibCGf0JcRFk=; b=CI5X+E7LWYk0XH+OzSwni+MoWgPTu5HtndpDXnOqF9faEAkuaULlKcmd0lygCathpvFdBASrg 4bDRnzyx1tNB1bkDi+UHEUCBKymKHiNPndUPXJqGBcyuGzcbcrQiVoC X-Developer-Key: i=rva333@protonmail.com; a=ed25519; pk=euuVBZGtA2Cqb8Dju84qpQPhvwxyUirJlXpqEPQWKBM= X-Endpoint-Received: by B4 Relay for rva333@protonmail.com/20260325 with auth_id=695 X-Original-From: Roman Vivchar Reply-To: rva333@protonmail.com From: Roman Vivchar Add support for the EFUSE controller found in the Mediatek MT6323 PMIC. The MT6323 EFUSE stores 24 bytes of hardware-related data, such as thermal sensor calibration values. Tested-by: Ben Grisdale # Amazon Echo Dot (2nd Generation) Signed-off-by: Roman Vivchar --- drivers/nvmem/Kconfig | 11 ++++++ drivers/nvmem/Makefile | 2 ++ drivers/nvmem/mt6323-efuse.c | 86 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 99 insertions(+) diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 74ddbd0f79b0..db248a3c4e87 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -227,6 +227,17 @@ config NVMEM_MTK_EFUSE This driver can also be built as a module. If so, the module will be called efuse-mtk. +config NVMEM_MT6323_EFUSE + tristate "Mediatek MT6323 PMIC EFUSE support" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on MFD_MT6397 + help + This is a driver to access hardware related data like sensor + calibration, etc. + + This driver can also be built as a module. If so, the module + will be called efuse-mt6323. + config NVMEM_MXS_OCOTP tristate "Freescale MXS On-Chip OTP Memory Support" depends on ARCH_MXS || COMPILE_TEST diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 7252b8ec88d4..0e2b73f42b25 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -48,6 +48,8 @@ obj-$(CONFIG_NVMEM_MICROCHIP_OTPC) += nvmem-microchip-otpc.o nvmem-microchip-otpc-y := microchip-otpc.o obj-$(CONFIG_NVMEM_MTK_EFUSE) += nvmem_mtk-efuse.o nvmem_mtk-efuse-y := mtk-efuse.o +obj-$(CONFIG_NVMEM_MT6323_EFUSE) += nvmem_mt6323-efuse.o +nvmem_mt6323-efuse-y := mt6323-efuse.o obj-$(CONFIG_NVMEM_MXS_OCOTP) += nvmem-mxs-ocotp.o nvmem-mxs-ocotp-y := mxs-ocotp.o obj-$(CONFIG_NVMEM_NINTENDO_OTP) += nvmem-nintendo-otp.o diff --git a/drivers/nvmem/mt6323-efuse.c b/drivers/nvmem/mt6323-efuse.c new file mode 100644 index 000000000000..0c1b405fbc89 --- /dev/null +++ b/drivers/nvmem/mt6323-efuse.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2026 Roman Vivchar + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MT6323_EFUSE_DOUT_BASE MT6323_EFUSE_DOUT_0_15 +#define MT6323_EFUSE_SIZE 24 + +struct mt6323_efuse { + struct regmap *regmap; +}; + +static int mt6323_efuse_read(void *context, unsigned int offset, void *val, + size_t bytes) +{ + struct mt6323_efuse *efuse = context; + u32 tmp; + u16 *buf = val; + int i, ret; + + for (i = 0; i < bytes; i += 2) { + ret = regmap_read(efuse->regmap, + MT6323_EFUSE_DOUT_BASE + offset + i, &tmp); + if (ret) + return ret; + buf[i / 2] = tmp; + } + return 0; +} + +static int mt6323_efuse_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mt6323_efuse *priv; + struct nvmem_config config = { + .name = "mt6323-efuse", + .stride = 2, + .word_size = 2, + .size = MT6323_EFUSE_SIZE, + .reg_read = mt6323_efuse_read, + }; + struct nvmem_device *nvmem; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + /* efuse -> mfd -> pwrap */ + priv->regmap = dev_get_regmap(dev->parent->parent, NULL); + if (!priv->regmap) + return -ENODEV; + + config.dev = dev; + config.priv = priv; + + nvmem = devm_nvmem_register(dev, &config); + return PTR_ERR_OR_ZERO(nvmem); +} + +static const struct of_device_id mt6323_efuse_of_match[] = { + { .compatible = "mediatek,mt6323-efuse" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, mt6323_efuse_of_match); + +static struct platform_driver mt6323_efuse_driver = { + .probe = mt6323_efuse_probe, + .driver = { + .name = "mt6323-efuse", + .of_match_table = mt6323_efuse_of_match, + }, +}; +module_platform_driver(mt6323_efuse_driver); + +MODULE_DESCRIPTION("Mediatek MT6323 PMIC EFUSE driver"); +MODULE_LICENSE("GPL"); -- 2.53.0