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 X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80DECC43457 for ; Fri, 16 Oct 2020 19:27:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 16F0820EDD for ; Fri, 16 Oct 2020 19:27:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="irfZ5Jkj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2410954AbgJPT1J (ORCPT ); Fri, 16 Oct 2020 15:27:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44004 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410864AbgJPT1I (ORCPT ); Fri, 16 Oct 2020 15:27:08 -0400 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B56B1C061755 for ; Fri, 16 Oct 2020 12:27:06 -0700 (PDT) Received: by mail-pf1-x441.google.com with SMTP id x13so2046221pfa.9 for ; Fri, 16 Oct 2020 12:27:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=mLxLynHYHoTvtEsSkRhZWkU/RgiHRhxUNICAiNl6VK4=; b=irfZ5JkjKsBUKudbsG1HSGVeI+AjsBoVJz9447HeLFE2hDXWFZ446feBb1fehgtFdv d/Jr6EbGgddUSS7VnQwvl9Nle/91zB5fCGGpaMQBM/Z6R6i26XYEqga9ZwEEOifAajzt 92M9KPZQ3Ogi82kIxezcWxvfD4lsEZPNHXk4A= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=mLxLynHYHoTvtEsSkRhZWkU/RgiHRhxUNICAiNl6VK4=; b=QOq2lV/8S4nniyLyT6rwPWQUmmoxf6+7j92KWFbpagZHACiBVfLDKXe6F0RGShnDHJ MApaSDgnwa08tsge1ehgksWoOSI7wje2IbOqxQNLPyqruNos5MFmzMO5VpuDa6xNqHpd oxCY/Y791m/uRwbZhbzA9gsq/TcDBm8gOGDG1H7bxPs7eRjR0Ou6S67epdw+xO7qcPyw 5s42RLmh9lvtn9I4n/e2Bu3YYA9WkjWNWXB8Y7dfaiD5Og6vaPn4EU6WIck+9rWz3rNg mhoQq1rs/kKHSmhkE72WQL6MfIzVh9Afhkh71BFO6xwTxxcpGCYVIMbQ/v5/FY626qEZ MifQ== X-Gm-Message-State: AOAM5328oFFqlww4PzOtXsemtJ+RQb3X2Ko6zhPsiLB9XbDnjkMXv9AS x2R3VwNJszGYAjwRw9pKNsslTg== X-Google-Smtp-Source: ABdhPJzfkwOqpdP1bmZhf0gv3Kh9aMomS1AQoXErUNl+L6qp+XK7HYll5vrZeiKQmJjCtJXNbqpeLg== X-Received: by 2002:a63:5c42:: with SMTP id n2mr4499956pgm.14.1602876426279; Fri, 16 Oct 2020 12:27:06 -0700 (PDT) Received: from evgreen-glaptop.cheshire.ch ([2601:646:c780:1404:a2ce:c8ff:fec4:54a3]) by smtp.gmail.com with ESMTPSA id lb13sm3566622pjb.5.2020.10.16.12.27.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 16 Oct 2020 12:27:05 -0700 (PDT) From: Evan Green To: Rob Herring , Bjorn Andersson , Srinivas Kandagatla Cc: Stephen Boyd , Douglas Anderson , Evan Green , Andy Gross , devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/4] nvmem: qfprom: Avoid untouchable regions Date: Fri, 16 Oct 2020 12:26:50 -0700 Message-Id: <20201016192654.32610-1-evgreen@chromium.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Certain fuses are protected by the XPU such that the AP cannot access them. Attempting to do so causes an SError. Introduce an SoC-specific compatible string, and introduce support into the nvmem core to avoid accessing specified regions. Then use those new elements in the qfprom driver to avoid SErrors when usermode accesses certain registers. Changes in v2: - Add other soc compatible strings (Doug) - Fix compatible string definition (Doug) - Introduced keepout regions into the core (Srini) - Use new core support in qfprom (Srini) Evan Green (4): dt-bindings: nvmem: Add soc qfprom compatible strings arm64: dts: qcom: sc7180: Add soc-specific qfprom compat string nvmem: core: Add support for keepout regions nvmem: qfprom: Don't touch certain fuses .../bindings/nvmem/qcom,qfprom.yaml | 13 ++- arch/arm64/boot/dts/qcom/sc7180.dtsi | 2 +- drivers/nvmem/core.c | 95 ++++++++++++++++++- drivers/nvmem/qfprom.c | 30 ++++++ include/linux/nvmem-provider.h | 17 ++++ 5 files changed, 151 insertions(+), 6 deletions(-) -- 2.26.2