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=-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 5BC6CC43461 for ; Thu, 1 Apr 2021 17:56:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34305610A0 for ; Thu, 1 Apr 2021 17:56:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236435AbhDAR4e (ORCPT ); Thu, 1 Apr 2021 13:56:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234292AbhDARmm (ORCPT ); Thu, 1 Apr 2021 13:42:42 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4EADC00F7FD for ; Thu, 1 Apr 2021 08:15:30 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id a12so1692784pfc.7 for ; Thu, 01 Apr 2021 08:15:30 -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=p8Vu5ZvLUSLepbw2MVmx2WeN8I+Zxz5MU2S6/VR8IzPIHsXrQtI4YtTw5Ithnwu2Sr 34QwLJU5Ujb/2ElBq3VO13OHtVIsZ3iqJjNeChtJXsKzXUVTN9oQOiS+Rh3NyEY0sH7m oHsIQgF1noCVG0hBMXQThunqlM5C9iF7Vgpm/axnPEW7lGzW772zMv98DTkS3tyHiICN bmQkdGmL7Ff2mnAz2meAtZtrrhKnPLFJjiaBx4sWn386lnanoXLuKjGFC/aUSblE1gnx 7y83EYuPkbobFshrGX6+nic5asRx3GLqrWnOE+F3ZH+huVDcOHvHb4FDGRY7U2iVkNtT ugiA== 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=BzukLDd7rsIMCwDMv6cL1JKGUz9h88/hUKKEZKcJ63CYbuNzd+eCrLLVzpBuyg4bo2 rUIrku+e7A9rDOGzIAdOVlc6noWqgfbpVyvQLnNkuYVouOA2i4s8DNZU9Lx+uNEdH9MR JTNct9/cDHwT5sfdZgCr3bbdajJNKFv36+jr6tUgaJ4YWtdh7Xz3EP77TjilcN610pSH 8ofVvtImWYMQjDhzuHP0UeQgzmNIoX8d8s3WQc48AvYseSuX1U/8YS1ECEZXeJ4Ys62E kVicplEsAknB1jhMdjkojCXzvTj1Bdgv4ma1FJNbglOcoFszz74+/F+w5NLwUYe3y0Vr BgGg== X-Gm-Message-State: AOAM530WnZMp0Wp21x08lCfjM96AmtpjUaXXhrR+5oI63Qxrtl7Epg8X +Db8N6jWVcXgslTELYED8jgr X-Google-Smtp-Source: ABdhPJwRmhl3TIKgIdZ+RmULKMqYyRa10/cmsKN2X28wr+9oyOZImS9dX/firxN51T5kWZBZAaKQcQ== X-Received: by 2002:aa7:8b0f:0:b029:20d:1b60:e823 with SMTP id f15-20020aa78b0f0000b029020d1b60e823mr8022613pfd.16.1617290130298; Thu, 01 Apr 2021 08:15:30 -0700 (PDT) Received: from localhost.localdomain ([103.77.37.138]) by smtp.gmail.com with ESMTPSA id 35sm5652769pgr.14.2021.04.01.08.15.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Apr 2021 08:15:29 -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 v9 2/4] dt-bindings: mtd: Add a property to declare secure regions in NAND chips Date: Thu, 1 Apr 2021 20:45:06 +0530 Message-Id: <20210401151508.143075-3-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210401151508.143075-1-manivannan.sadhasivam@linaro.org> References: <20210401151508.143075-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 -- 2.25.1