From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2BD30CAC58C for ; Tue, 9 Sep 2025 06:54:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:To:From:Reply-To: Cc:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/8ZxWh8QbSoPIVp/7cwB8nhVxGRfzfajbCEssA2+7fk=; b=WtXvZio/nBLbfAe4yc8vgaasPV 920gvN9Y1llTzG2+iCG3xJbdmU9cuHE8OFXcWKiO2aHldrdQNde1uA7eFg5/9n1/Mr5JjI0ZNH2fW ZUPbaMQOBhqex+udgx5ElXRSLE0dSPSMIU2rQwuMtFZmwKImZm6gQCTUnYCjRT/yP0d9gcWIgKERn dsZod7TWQvNEQhKNvD5Bjej0ZU8SWEOjJ56vWsWdpwKXYq1pUmMJwwBFnGbaFK73TAJ2U+HFYYTkX +7Y0jzt/eKMrqAqGjEZDDcpGab0QykVZS+Rn2dpeec0l4F2fdUr4/CmHvGLccUJL4o5EJy/8m4x0Q p/WFDvWw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uvsFW-00000004u8d-0ea9; Tue, 09 Sep 2025 06:54:42 +0000 Received: from mail-wm1-x32f.google.com ([2a00:1450:4864:20::32f]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uvmSq-00000003I2T-1M7L; Tue, 09 Sep 2025 00:44:05 +0000 Received: by mail-wm1-x32f.google.com with SMTP id 5b1f17b1804b1-45cb5492350so32269035e9.1; Mon, 08 Sep 2025 17:44:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1757378643; x=1757983443; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=/8ZxWh8QbSoPIVp/7cwB8nhVxGRfzfajbCEssA2+7fk=; b=bO8Q9lZ7NuClCdSZ3/CcOJK8j6/htVYdO/dCfU0EVZfDBPfK5oQev3sy6pwifE3z9Z dkFh1Jm5GWC4w343qQoKGQ6MkGrUxjcug/h6qT0MGjBNS/OZFIABw1vTCULa8XcYM2tn QdZRzULZ1pgolU8mevNeLaz8GvDprTCyDL6b4swl/OQDn8ph0uy3WxieZe7n3JhsFSQ/ DuVhDnh2GOBxeAHlRa26n0S4P9s4SyLRXoUSqQsKxdFaGWaIVFHdKyvsUq427o0eTDYw byaImcR+95mApBxn3tvU88T+wM7IFsLYpjTgkvb05L/zszOuDNZw+ir/BbYEWFQgeo1n Iy+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757378643; x=1757983443; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/8ZxWh8QbSoPIVp/7cwB8nhVxGRfzfajbCEssA2+7fk=; b=aSjBwNsj21Xkfm8ZwslIeDfvQblrkDhVINaZK3qSnAt9+lrOy6J1rJ19b0CxblLS2l p+noTcEug3JtvukwodyVYzpkzlz2Ww48veDBlAc7lYardpPVW+Dtmg6oXzILYhGFzH6p su91aI/wcW9onu92X7IoU4TRcALuM167dcrCO4Ovj066oKmKOyytcTaqn8dXSCaH/G90 qHF1P/3KdQlCduEKeIfyTKirbF7ReQEiVe46OwfVUNKyi68UU/MDtXyJR8P4Vw9L8pBM IsgpewyjAcZWeKdUk5+Xhal0tjGXK4HbmZ02hQFT5eKec1nHp2rFznRWnInkMNnT7v4B YjVw== X-Forwarded-Encrypted: i=1; AJvYcCWqooOWuQA165bY4FIR7vUIs9WuiUqPrWF7Nu/rFJmt0u+lSAjUFCWY5AXjrJNYe58FOsYGlFyLDYLavQiJZk92@lists.infradead.org, AJvYcCXh6cCnLTqFCOhIWqyKR2DM89Bzd5RUVmAX1JkV/vY+dJruQtUh/1tojavzs0MhIFgX7lv+sg5kZxOaEqyRKSM=@lists.infradead.org X-Gm-Message-State: AOJu0YzojuGAsbgHN3O+SjaTvGTHsGQ5x2BIG6eCdJPEzdRArcxrDBso 2LAUbb6suUQI/qLV3TEkXE6qirvQkkvvS6Ec82w3xDk77QxJAtokyk99 X-Gm-Gg: ASbGncv/JgeF4U7BLBkOfcHrtcgveoMJAQzVNl2SCCVIRibpS/K7nEpIIuiaq31QyUQ +LWUWqIp0EqXu3RDkvR8R31DkFCtAXPrbDBx/NgEgO3NPR2A9zSWhwBN+et9JG3aLmceyyLRftb AFDclR+CIswdk36PIVFGM3j4SZ6FriM4V+8fbjeWBV6reXvEb+z7BSvyiHk+BCKQq2HlcXG34oi qAHalMKym/w331RCh3+beDZw2HaDxbCE7oLO6E5VBTm7yXQcwaaZcmh/e+YzAwdNMl7ng8ODiGe 4CBzQ7Em17YUDkyeK0YOlElka7g1zpItcoEXT3iW8AUdTVwGNSgeYbUTHJxHhC6UgjSTI7JruQ4 u0itdDDbRxUdkIobLhXwmEpWf42Khm3JGXUFvSirpax0+//bR08olGyCagp5pjodkMX8UrAU= X-Google-Smtp-Source: AGHT+IH2QZT//ViKYRYMV5MXicqqc5U2Nniw6K5/BIDkRECDDT9hG2C49l/NAs8DHGYP02QVVHvpTg== X-Received: by 2002:a05:600c:3113:b0:45c:b5e0:2cf5 with SMTP id 5b1f17b1804b1-45dddee9c4cmr90116085e9.24.1757378642688; Mon, 08 Sep 2025 17:44:02 -0700 (PDT) Received: from Ansuel-XPS24 (host-95-249-236-54.retail.telecomitalia.it. [95.249.236.54]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-45decf8759esm13526385e9.23.2025.09.08.17.44.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Sep 2025 17:44:02 -0700 (PDT) From: Christian Marangi To: Christian Marangi , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vladimir Oltean , Srinivas Kandagatla , Heiner Kallweit , Russell King , "Chester A. Unal" , Daniel Golle , DENG Qingfang , Sean Wang , Simon Horman , Matthias Brugger , AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [net-next PATCH v16 05/10] nvmem: an8855: Add support for Airoha AN8855 Switch EFUSE Date: Tue, 9 Sep 2025 02:43:36 +0200 Message-ID: <20250909004343.18790-6-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250909004343.18790-1-ansuelsmth@gmail.com> References: <20250909004343.18790-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250908_174404_361240_B6AA8836 X-CRM114-Status: GOOD ( 21.89 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add support for Airoha AN8855 Switch EFUSE. These EFUSE might be used for calibration data for the internal switch PHYs. Signed-off-by: Christian Marangi --- drivers/nvmem/Kconfig | 11 ++++++ drivers/nvmem/Makefile | 2 ++ drivers/nvmem/an8855-efuse.c | 68 ++++++++++++++++++++++++++++++++++++ 3 files changed, 81 insertions(+) create mode 100644 drivers/nvmem/an8855-efuse.c diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index edd811444ce5..446818a875da 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -28,6 +28,17 @@ source "drivers/nvmem/layouts/Kconfig" # Devices +config NVMEM_AN8855_EFUSE + tristate "Airoha AN8855 eFuse support" + depends on MFD_AIROHA_AN8855 || COMPILE_TEST + help + Say y here to enable support for reading eFuses on Airoha AN8855 + Switch. These are e.g. used to store factory programmed + calibration data required for the PHY. + + This driver can also be built as a module. If so, the module will + be called nvmem-an8855-efuse. + config NVMEM_APPLE_EFUSES tristate "Apple eFuse support" depends on ARCH_APPLE || COMPILE_TEST diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 2021d59688db..5c9e6e450181 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -10,6 +10,8 @@ nvmem_layouts-y := layouts.o obj-y += layouts/ # Devices +obj-$(CONFIG_NVMEM_AN8855_EFUSE) += nvmem-an8855-efuse.o +nvmem-an8855-efuse-y := an8855-efuse.o obj-$(CONFIG_NVMEM_APPLE_EFUSES) += nvmem-apple-efuses.o nvmem-apple-efuses-y := apple-efuses.o obj-$(CONFIG_NVMEM_APPLE_SPMI) += apple_nvmem_spmi.o diff --git a/drivers/nvmem/an8855-efuse.c b/drivers/nvmem/an8855-efuse.c new file mode 100644 index 000000000000..d1afde6f623f --- /dev/null +++ b/drivers/nvmem/an8855-efuse.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Airoha AN8855 Switch EFUSE Driver + */ + +#include +#include +#include +#include +#include + +#define AN8855_EFUSE_CELL 50 + +#define AN8855_EFUSE_DATA0 0x1000a500 +#define AN8855_EFUSE_R50O GENMASK(30, 24) + +static int an8855_efuse_read(void *context, unsigned int offset, + void *val, size_t bytes) +{ + struct regmap *regmap = context; + + return regmap_bulk_read(regmap, AN8855_EFUSE_DATA0 + offset, + val, bytes / sizeof(u32)); +} + +static int an8855_efuse_probe(struct platform_device *pdev) +{ + struct nvmem_config an8855_nvmem_config = { + .name = "an8855-efuse", + .size = AN8855_EFUSE_CELL * sizeof(u32), + .stride = sizeof(u32), + .word_size = sizeof(u32), + .reg_read = an8855_efuse_read, + }; + struct device *dev = &pdev->dev; + struct nvmem_device *nvmem; + struct regmap *regmap; + + /* Assign NVMEM priv to MFD regmap */ + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return -ENOENT; + + an8855_nvmem_config.priv = regmap; + an8855_nvmem_config.dev = dev; + nvmem = devm_nvmem_register(dev, &an8855_nvmem_config); + + return PTR_ERR_OR_ZERO(nvmem); +} + +static const struct of_device_id an8855_efuse_of_match[] = { + { .compatible = "airoha,an8855-efuse", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, an8855_efuse_of_match); + +static struct platform_driver an8855_efuse_driver = { + .probe = an8855_efuse_probe, + .driver = { + .name = "an8855-efuse", + .of_match_table = an8855_efuse_of_match, + }, +}; +module_platform_driver(an8855_efuse_driver); + +MODULE_AUTHOR("Christian Marangi "); +MODULE_DESCRIPTION("Driver for AN8855 Switch EFUSE"); +MODULE_LICENSE("GPL"); -- 2.51.0