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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,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 CA39EC4320A for ; Sun, 1 Aug 2021 07:38:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ACA2761042 for ; Sun, 1 Aug 2021 07:38:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230402AbhHAHik (ORCPT ); Sun, 1 Aug 2021 03:38:40 -0400 Received: from 82-65-109-163.subs.proxad.net ([82.65.109.163]:60414 "EHLO luna.linkmauve.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229505AbhHAHih (ORCPT ); Sun, 1 Aug 2021 03:38:37 -0400 Received: by luna.linkmauve.fr (Postfix, from userid 1000) id 29841F40868; Sun, 1 Aug 2021 09:38:25 +0200 (CEST) From: Emmanuel Gil Peyrot To: Rob Herring , linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org Cc: Emmanuel Gil Peyrot , Ash Logan , =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= , Srinivas Kandagatla , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , linux-kernel@vger.kernel.org Subject: [PATCH v4 0/5] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP Date: Sun, 1 Aug 2021 09:38:17 +0200 Message-Id: <20210801073822.12452-1-linkmauve@linkmauve.fr> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210701225743.14631-1-linkmauve@linkmauve.fr> References: <20210701225743.14631-1-linkmauve@linkmauve.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The OTP is a read-only memory area which contains various keys and signatures used to decrypt, encrypt or verify various pieces of storage. Its size depends on the console, it is 128 bytes on the Wii and 1024 bytes on the Wii U (split into eight 128 bytes banks). It can be used directly by writing into one register and reading from the other one, without any additional synchronisation. This series has been tested on both the Wii U (using my downstream master-wiiu branch[1]), as well as on the Wii on mainline. [1] https://gitlab.com/linkmauve/linux-wiiu/-/commits/master-wiiu Changes since v1: - Fixed the commit messages so they can be accepted by other email servers, sorry about that. Changes since v2: - Switched the dt binding documentation to YAML. - Used more obvious register arithmetic, and tested that gcc (at -O1 and above) outputs the exact same rlwinm instructions for them. - Use more #defines to make the code easier to read. - Include some links to the reversed documentation. - Avoid overlapping dt regions by changing the existing control@d800100 node to end before the OTP registers, with some bigger dt refactoring left for a future series. Changes since v3: - Relicense the dt-binding documentation under GPLv2-only or BSD-2-clauses. Emmanuel Gil Peyrot (5): nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP dt-bindings: nintendo-otp: Document the Wii and Wii U OTP support powerpc: wii.dts: Reduce the size of the control area powerpc: wii.dts: Expose the OTP on this platform powerpc: wii_defconfig: Enable OTP by default .../bindings/nvmem/nintendo-otp.yaml | 44 +++++++ arch/powerpc/boot/dts/wii.dts | 13 +- arch/powerpc/configs/wii_defconfig | 1 + drivers/nvmem/Kconfig | 11 ++ drivers/nvmem/Makefile | 2 + drivers/nvmem/nintendo-otp.c | 124 ++++++++++++++++++ 6 files changed, 194 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/nvmem/nintendo-otp.yaml create mode 100644 drivers/nvmem/nintendo-otp.c -- 2.32.0