From patchwork Thu Mar 18 12:43:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 404882 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 9C290C43331 for ; Thu, 18 Mar 2021 12:44:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4777064F7A for ; Thu, 18 Mar 2021 12:44:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230171AbhCRMoZ (ORCPT ); Thu, 18 Mar 2021 08:44:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230398AbhCRMoG (ORCPT ); Thu, 18 Mar 2021 08:44:06 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0E71C061763 for ; Thu, 18 Mar 2021 05:44:05 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id h20so1245529plr.4 for ; Thu, 18 Mar 2021 05:44:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=cGzmTTjWe1AbEuSBzNDXhCdxGNlI9I7Ym5rhNfsOEPE=; b=YC6h+Stopa6z4/mq+u/ZKuzl0bQVUdulYA/hh1D1RU0UCZ49zW6TI1tDmrWJyrxjsZ 9+29bYa5hJW16jRKG8vqcJ6i3r78Be26LUrc7lP54b+z4rE0q2K6m03X+ptLa8hp7qMl PiHQln2RVCE4T8F+USS0E4npCJsvUczGecOPSjXYy2Rjq1iy7/n1gXVsrlknpFE9TUvE lEzpZtiBNO8JhjbVow7AKisJI8Hmcvqx7shtmV5sm0+/P7mXSrAykVtKCPNvy5D5kk6L iZLn4mmd2WFfWjcLH0/86A3m9tbErGOC4s2TL9/gTioudWfaN9AqT6wDQh5Y6VXgvtAC iVBQ== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=cGzmTTjWe1AbEuSBzNDXhCdxGNlI9I7Ym5rhNfsOEPE=; b=S7woCbBg0UVdFY5O7Rw5BztoKl76pQT2CtlRKLi1oY/vtMlQm+HPyEOpRaEcI88SWX a9Cr5iRdUNlSba8P6aX8F97Y5k1qK2u8i8gVEQ/NEaqK0BNgo1mkvYbnZnNpNmeEcEQ+ 5dan+hOUPqTjgveo5XFw9N7KWeO5RpeTCx6cTs3HOg/KSAINZUslYOsQfwDaUNYliBVj 0iGnCPrmJ/7qw2SFq5le5CaeI9y9XYUV4wCV4EzV2z256Dp9h+GjfroHqMoJTbq0xBDT zRA0rwIZ48fnU3Mbxkes1h9R7eOcOOtgW+E83Uo6fAoQj/npafM0zVleo3Y2kEz2Od/H LtZA== X-Gm-Message-State: AOAM533gqGBv1wqRLjfDz50HnMhl3uaUjZNjL/dKdau1O7fXzpYpkhxr zmyBNXn+lZdzN9FTHi6rOY49 X-Google-Smtp-Source: ABdhPJyZmBBHjfYzZLXR3tLchvSFoaX5tKaC+xbOnAaz9tQnnDGB37XBmQLX8mkxaOkIvUg6+00nXg== X-Received: by 2002:a17:903:4112:b029:e5:f79d:3eb1 with SMTP id r18-20020a1709034112b02900e5f79d3eb1mr9293334pld.48.1616071445438; Thu, 18 Mar 2021 05:44:05 -0700 (PDT) Received: from localhost.localdomain ([2409:4072:6d00:4737:af26:182c:a57e:1d9e]) by smtp.gmail.com with ESMTPSA id w84sm2530694pfc.142.2021.03.18.05.44.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Mar 2021 05:44:04 -0700 (PDT) From: Manivannan Sadhasivam To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, robh+dt@kernel.org Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, boris.brezillon@collabora.com, Daniele.Palmas@telit.com, bjorn.andersson@linaro.org, Manivannan Sadhasivam Subject: [PATCH v6 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips Date: Thu, 18 Mar 2021 18:13:41 +0530 Message-Id: <20210318124342.32745-3-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210318124342.32745-1-manivannan.sadhasivam@linaro.org> References: <20210318124342.32745-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On a typical end product, a vendor may choose to secure some regions in the NAND memory which are supposed to stay intact between FW upgrades. The access to those regions will be blocked by a secure element like Trustzone. So the normal world software like Linux kernel should not touch these regions (including reading). So let's add a property for declaring such secure regions so that the drivers can skip touching them. Signed-off-by: Manivannan Sadhasivam --- Documentation/devicetree/bindings/mtd/nand-controller.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/nand-controller.yaml b/Documentation/devicetree/bindings/mtd/nand-controller.yaml index d0e422f4b3e0..678b39952502 100644 --- a/Documentation/devicetree/bindings/mtd/nand-controller.yaml +++ b/Documentation/devicetree/bindings/mtd/nand-controller.yaml @@ -143,6 +143,13 @@ patternProperties: Ready/Busy pins. Active state refers to the NAND ready state and should be set to GPIOD_ACTIVE_HIGH unless the signal is inverted. + secure-regions: + $ref: /schemas/types.yaml#/definitions/uint64-matrix + description: + Regions in the NAND chip which are protected using a secure element + like Trustzone. This property contains the start address and size of + the secure regions present. + required: - reg