From patchwork Mon May 8 18:16:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Conor Dooley X-Patchwork-Id: 679984 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 5A7A1C7EE22 for ; Mon, 8 May 2023 18:17:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230187AbjEHSRF (ORCPT ); Mon, 8 May 2023 14:17:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57306 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232779AbjEHSRE (ORCPT ); Mon, 8 May 2023 14:17:04 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B4175FE8 for ; Mon, 8 May 2023 11:17:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AA98A62F0F for ; Mon, 8 May 2023 18:17:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7550CC4339C; Mon, 8 May 2023 18:16:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1683569822; bh=pEkQiWBINoXiTLpYTJ+D1743e4SOfUpdwjwXGQmi2Nk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LpCAVUaxcJjhoad5gbeqsUQCfaua+zg6IbA5rkPbTdwywu2JKINyDuAdkH7BIzECp FGXurYzC2J/OgJgceOMyePFn0+i9ll10Xs7l1qSVdNvvZmGQFn5BlxkCIGLPSCU7Zx 78U2CcMMAvcG+15+JBjCBSaHVNmjA/4WRs7O0R7+7JCOnbBBn/KbvcH0TYsXod7j71 hJ82onfdcnNyPY9edo8xz8xHVmu1Mt1BZLTmb8YdVvVRKz9ntuemhnyiTB9LFKPwhL EJ7W6SOmU2xtJe/ihfsP/hpaThNWYHyze+7zwmOAwvF44liqTxobAPUbWEHYwRZaO5 6VNDvFIWa1yPA== From: Conor Dooley To: linux-riscv@lists.infradead.org Cc: conor@kernel.org, Conor Dooley , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Palmer Dabbelt , Paul Walmsley , Heiko Stuebner , Andrew Jones , Sunil V L , Yangyu Chen , devicetree@vger.kernel.org Subject: [RFC 2/6] dt-bindings: riscv: add riscv, isa-extension-* property and incompatible example Date: Mon, 8 May 2023 19:16:22 +0100 Message-Id: <20230508-sneeze-cesarean-d1aff8be9cc8@spud> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230508-hypnotic-phobia-99598439d828@spud> References: <20230508-hypnotic-phobia-99598439d828@spud> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3388; i=conor.dooley@microchip.com; h=from:subject:message-id; bh=mr+KTOsZI6CeMW3M1d3JDMm2IRvhFpi9WHx/17JxyMg=; b=owGbwMvMwCFWscWwfUFT0iXG02pJDCmRNqUqQpc3/nj4h//xeaPUtb86SlI0GVYZLykrf5tq+ 1RzZ5FJRykLgxgHg6yYIkvi7b4WqfV/XHY497yFmcPKBDKEgYtTACbyTIPhn7rL/Jb6hHuPuW2L P6o2LojcddjYO/DrjX82F5QKUw7fvsvwT2F1xbvzjdWcjxW2+t92Welp6KV85kzi7oD8O1f7eI/ 5cgEA X-Developer-Key: i=conor.dooley@microchip.com; a=openpgp; fpr=F9ECA03CF54F12CD01F1655722E2C55B37CF380C Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Conor Dooley This dt-binding is illustrative *only*, it doesn't yet do what I want it to do in terms of enforcement etc. I am yet to figure out exactly how to wrangle the binding such that the individual properties have more generous versions than the generic pattern property. This binding *will* generate errors, and needs rework before it can seriously be considered. Nevertheless, it should demonstrate how I intend such a property be used. Not-signed-off-by: Conor Dooley --- .../devicetree/bindings/riscv/cpus.yaml | 61 ++++++++++++++++++- 1 file changed, 60 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml index 405915b04d69..cccb3b2ae23d 100644 --- a/Documentation/devicetree/bindings/riscv/cpus.yaml +++ b/Documentation/devicetree/bindings/riscv/cpus.yaml @@ -100,6 +100,15 @@ properties: lowercase. $ref: "/schemas/types.yaml#/definitions/string" pattern: ^rv(?:64|32)imaf?d?q?c?b?k?j?p?v?h?(?:[hsxz](?:[a-z])+)?(?:_[hsxz](?:[a-z])+)*$ + deprecated: true + + riscv,isa-base: + description: + Identifies the base ISA supported by a hart. + $ref: "/schemas/types.yaml#/definitions/string" + enum: + - rv32i + - rv64i # RISC-V requires 'timebase-frequency' in /cpus, so disallow it here timebase-frequency: false @@ -136,8 +145,32 @@ properties: DMIPS/MHz, relative to highest capacity-dmips-mhz in the system. + riscv,isa-extension-v: + description: RISC-V Vector extension + $ref: "/schemas/types.yaml#/definitions/string" + oneOf: + - const: v1.0.0 + description: the original incarnation + - const: v1.0.1 + description: backwards compat was broken here + +patternProperties: + "^riscv,isa-extension-*": + description: + Catch-all property for ISA extensions that do not need any special + handling, and of which all known versions are compatible with their + original revision. + $ref: "/schemas/types.yaml#/definitions/string" + enum: + - v1.0.0 + +oneOf: + - required: + - riscv,isa-base + - required: + - riscv,isa + required: - - riscv,isa - interrupt-controller additionalProperties: true @@ -208,4 +241,30 @@ examples: }; }; }; + + - | + // Example 3: Extension specification + cpus { + #address-cells = <1>; + #size-cells = <0>; + cpu@0 { + device_type = "cpu"; + reg = <0>; + compatible = "riscv"; + riscv,isa-base = "rv64i"; + riscv,isa-extension-i = "v1.0.0"; + riscv,isa-extension-m = "v1.0.0"; + riscv,isa-extension-a = "v1.0.0"; + riscv,isa-extension-f = "v1.0.0"; + riscv,isa-extension-d = "v1.0.0"; + riscv,isa-extension-c = "v2.0.0"; + riscv,isa-extension-v = "v1.0.1"; + mmu-type = "riscv,sv48"; + interrupt-controller { + #interrupt-cells = <1>; + interrupt-controller; + compatible = "riscv,cpu-intc"; + }; + }; + }; ...