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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8669C4332F for ; Tue, 12 Apr 2022 13:53:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356373AbiDLNz3 (ORCPT ); Tue, 12 Apr 2022 09:55:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356352AbiDLNzZ (ORCPT ); Tue, 12 Apr 2022 09:55:25 -0400 Received: from smtp2.axis.com (smtp2.axis.com [195.60.68.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7955757488; Tue, 12 Apr 2022 06:53:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1649771588; x=1681307588; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=jupemliQ8dJWnscgwhDk1djkO0V1yNDM+5JWRzk83NE=; b=AsPkKyqRtkZeyL7JAWRqNjITpIQwd2aRv3sIsgEO3000zpSp1w7RwlHG 9iaNT6vCNeCQdXD+dAmx3OKQbEGaag9JLgIMG3QITu4CDDSo8t+4MiUrt sv1UOvMIO7W+b+/BaG9G9Ji/uyncRR7ExGGmXLYCZkem/zHYpWLqyYdqF cMLDu36juukh721NzCbP/+J7U0AFr1oLzI8UUjoNqQ9ZVAJ/9Qe93ovld VVDqHlyZKvS/E7+NvXwJHB7NnUO9UGCn4WNiCect5HZmBrb4orkf3sWRq v/Wi1Ik27HultEwH27w2Sq7i68Jq11RFgt1Z0XWO8QGn8bM5Ea63DG5r7 A==; From: Vincent Whitchurch To: , , , CC: , Vincent Whitchurch , , , , , , Subject: [PATCH v3 2/4] dt-bindings: reserved-memory: Support MTD/block device Date: Tue, 12 Apr 2022 15:53:00 +0200 Message-ID: <20220412135302.1682890-3-vincent.whitchurch@axis.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220412135302.1682890-1-vincent.whitchurch@axis.com> References: <20220412135302.1682890-1-vincent.whitchurch@axis.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add bindings to allow MTD/block devices to be used in reserved-memory regions using the "phram" (MTD in PHysical RAM) driver. This allows things like partitioning to be specified via the existing devicetree bindings. Signed-off-by: Vincent Whitchurch --- Notes: v3: - Reword description. v2: - Add note on what "phram" means. - Use /schemas/mtd/mtd.yaml instead of relative pathUse /schemas/mtd/mtd.yaml instead of relative path. .../bindings/reserved-memory/phram.yaml | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/phram.yaml diff --git a/Documentation/devicetree/bindings/reserved-memory/phram.yaml b/Documentation/devicetree/bindings/reserved-memory/phram.yaml new file mode 100644 index 000000000000..6c4db28015f1 --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/phram.yaml @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/reserved-memory/phram.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MTD/block device in RAM + +description: | + Specifies that the reserved memory region can be used as an MTD or block + device. + + The "phram" node is named after the "MTD in PHysical RAM" driver which + provides an implementation of this functionality in Linux. + +maintainers: + - Vincent Whitchurch + +allOf: + - $ref: "reserved-memory.yaml" + - $ref: "/schemas/mtd/mtd.yaml" + +properties: + compatible: + const: phram + + reg: + description: region of memory that can be used as an MTD/block device + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + + phram: flash@12340000 { + compatible = "phram"; + label = "rootfs"; + reg = <0x12340000 0x00800000>; + }; + }; -- 2.34.1