From patchwork Wed Nov 30 05:55:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Binbin Zhou X-Patchwork-Id: 1710339 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4NMT6h1XHvz23nv for ; Wed, 30 Nov 2022 16:59:08 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233820AbiK3F7F (ORCPT ); Wed, 30 Nov 2022 00:59:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232960AbiK3F6s (ORCPT ); Wed, 30 Nov 2022 00:58:48 -0500 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 8302D31EDA; Tue, 29 Nov 2022 21:58:45 -0800 (PST) Received: from loongson.cn (unknown [112.20.109.110]) by gateway (Coremail) with SMTP id _____8Dx++oU8YZj5kcCAA--.5281S3; Wed, 30 Nov 2022 13:58:44 +0800 (CST) Received: from localhost.localdomain (unknown [112.20.109.110]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxTuAR8YZjnUwiAA--.19574S2; Wed, 30 Nov 2022 13:58:42 +0800 (CST) From: Binbin Zhou To: Wolfram Sang , Wolfram Sang , Mika Westerberg , linux-i2c@vger.kernel.org Cc: loongarch@lists.linux.dev, devicetree@vger.kernel.org, Huacai Chen , WANG Xuerui , Andy Shevchenko , Arnd Bergmann , Rob Herring , Krzysztof Kozlowski , Jianmin Lv , Binbin Zhou Subject: [PATCH V4 0/5] i2c: ls2x: Add support for the Loongson-2K/LS7A I2C controller Date: Wed, 30 Nov 2022 13:55:50 +0800 Message-Id: X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxTuAR8YZjnUwiAA--.19574S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBjvJXoW7ur1DWw47XF4DtF4UZrW3trb_yoW8ur43pa 1a939Iyr1UtF17tF1fJa4xuryrursxJ3yDWFsrGw1DuFW5C34UJ3y5KFWY9rnrCry5GrWj qr98KF42kFyqyrJanT9S1TB71UUUUj7qnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bS8YFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s 1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwA2z4 x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26r4UJVWxJr1l n4kS14v26r126r1DM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6x ACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r126r1DMcIj6I8E 87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxV Aaw2AFwI0_JF0_Jw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxY O2xFxVAFwI0_JF0_Jw1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGV WUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_ JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rV WUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r1j6r4U YxBIdaVFxhVjvjDU0xZFpf9x07j5o7tUUUUU= X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Hi all: This patch series adds support for the I2C module found on various Loongson systems with the Loongson-2K SoC or the Loongson LS7A bridge chip. For now, the I2C driver is suitable for DT-based or ACPI-based systems. I have tested on Loongson-3A5000LA+LS7A1000/LS7A2000, Loongson-2K1000LA and Loongson-2K0500. Thanks. Changes since V3: - Addressed all review comments from v3 - Change the changelog text to make it clearer (1/5); - Fix some minor bugs, such as formatting issues (2/5); - Fix some formatting issues, such as dropping quotes and checking with dt_binding_check (3/5); - Deep refactoring of code for clarity (4/5). Details: https://lore.kernel.org/all/Y4S2cnlAm3YYvZ8E@smile.fi.intel.com/ Thanks to all for their suggestions. Changes since V2: - Addressed all review comments from v2 - Drop of_match_ptr() in i2c-gpio to avoid potential unused warnings (1/5); - Introduce i2c_gpio_get_props() function as the generic interface to get i2c-gpio props from DT or ACPI table (2/5); - Refact ls2x i2c code, similar to removing excessive goto tags (4/5). Thanks to Andy and Mika for their suggestions. Changes since V1: - Remove the function of getting the static i2c bus number from ACPI "_UID"; - Fix build warning from kernel test robot. Binbin Zhou (5): i2c: gpio: Fix potential unused warning for 'i2c_gpio_dt_ids' i2c: gpio: Add support on ACPI-based system dt-bindings: i2c: add bindings for Loongson LS2X I2C i2c: ls2x: Add driver for Loongson-2K/LS7A I2C controller LoongArch: Enable LS2X I2C in loongson3_defconfig .../bindings/i2c/loongson,ls2x-i2c.yaml | 49 +++ arch/loongarch/configs/loongson3_defconfig | 1 + drivers/i2c/busses/Kconfig | 11 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-gpio.c | 30 +- drivers/i2c/busses/i2c-ls2x.c | 402 ++++++++++++++++++ 6 files changed, 482 insertions(+), 12 deletions(-) create mode 100644 Documentation/devicetree/bindings/i2c/loongson,ls2x-i2c.yaml create mode 100644 drivers/i2c/busses/i2c-ls2x.c