From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9BAEB257423 for ; Thu, 5 Mar 2026 12:56:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772715417; cv=none; b=LtUlTSwVuYa6j7agFkoYqDU/gJq/8mh05sUfg2NBTDOIRWQI+lROuUYUTf0ZK28ALZrRfuoBi9FmiSxzJzeWNwV6GcxxcQ8Zoo9841MoItKEJa2UJv6CbmAYjFrLvGRdBxujLSB3pDo5vv17p/8Tiz2fy/A7mDvuNNjeVvRu4ng= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772715417; c=relaxed/simple; bh=OohVGk8rJoJKukEILdvo11BXKOqdjAIBoh85kJ5Eye8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=tMlIh5XfbUPMoe6dr3u7ILaPS7649RWHUXB9BbHqQNutF6JbLfhi+aYBiTYWvO2lvRNT4tFB8GNLVRQUU0le9VdgDouUyDwxywX7M0W594T/hNBMtXVe21aO1yBx9+Y2SXNs1IEYf0lrh/ugDERsALQBZdpm8x8genmKTkTPnII= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.227]) by gateway (Coremail) with SMTP id _____8BxmsKNfalpJMYXAA--.5938S3; Thu, 05 Mar 2026 20:56:46 +0800 (CST) Received: from kernelserver (unknown [223.64.68.227]) by front1 (Coremail) with SMTP id qMiowJDxjcKGfalpJt5OAA--.16319S2; Thu, 05 Mar 2026 20:56:43 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andi Shyti , Wolfram Sang , Andy Shevchenko , linux-i2c@vger.kernel.org Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, devicetree@vger.kernel.org, Binbin Zhou Subject: [PATCH v4 0/2] i2c: Add Loongson-2K0300 I2C controller support Date: Thu, 5 Mar 2026 20:56:29 +0800 Message-ID: X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJDxjcKGfalpJt5OAA--.16319S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/1tbiAQERCGmpG0IKfAAAs2 X-Coremail-Antispam: 1Uk129KBj93XoW7ZrWDWFWfCr17uF1DKFWxGrX_yoW8uFWfpa y5A3sIkF1jgr129rs3XrWfZryavF4fJF43Wr47A34Y9anrA3yUZ3yakFs0vFWDCryxuF42 q39rKw1UCa4qvFgCm3ZEXasCq-sJn29KB7ZKAUJUUUU7529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBIb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r106r15M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2kKe7AKxVWUXVWUAwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07 AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWU AVWUtwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7V AKI48JMxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY 6r1j6r4UMxCIbckI1I0E14v26r1Y6r17MI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7 xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xII jxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw2 0EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x02 67AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7IU86OJ5UUUUU== Hi all: This patch set describes the I2C controller integrated the Loongson-2K0300 chip. It has a significantly different design from the previous I2C controller(i2c-ls2x), such as support for master-slave transfer mode, and DMA transfers (implementation in progress), etc. Therefore, we try to name it i2c-ls2x-v2. Thanks. ====== V4: - Rebase on linux-i2c/i2c-next; Patch (2/2): - The parent_rate parameter type should be `unsigned long`; - Drop fallthrough and add missing break; - device_set_node()->i2c_adapter_set_node(); - Use i2c_parse_fw_timings(); - Use i2c_t.bus_freq_hz instead of priv->speed; - Sperate loongson2_i2c_handle_read() into loongson2_i2c_handle_read() and loongson2_i2c_handle_rx_done(). Link to V3: https://lore.kernel.org/all/cover.1772001073.git.zhoubinbin@loongson.cn/ V3: - Rebase on linux-i2c/i2c-next; Patch (2/2): - Reorder header file follow IWYU principle; - Better indentation and coding style; - Use generic macro definitions; - Amend *all* struct data types; - Correct unreasonable variable type definitions; - Refact loongson2_i2c_isr_error(); - of_property_read_u32()->device_property_read_u32(); - Remove meaningless blank lines and output. Link to V2: https://lore.kernel.org/all/cover.1769476820.git.zhoubinbin@loongson.cn/ V2: Patch (1/2): - Add Acked-by tag from Conor, thanks. Patch (2/2): - Reorder the definitions of read() and write(); - Adjust the calculation method for bus speed. Link to V1: https://lore.kernel.org/all/cover.1763018288.git.zhoubinbin@loongson.cn/ Binbin Zhou (2): dt-bindings: i2c: loongson,ls2x: Add ls2k0300-i2c compatible i2c: ls2x-v2: Add driver for Loongson-2K0300 I2C controller .../bindings/i2c/loongson,ls2x-i2c.yaml | 4 + MAINTAINERS | 1 + drivers/i2c/busses/Kconfig | 10 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-ls2x-v2.c | 545 ++++++++++++++++++ 5 files changed, 561 insertions(+) create mode 100644 drivers/i2c/busses/i2c-ls2x-v2.c base-commit: 6117e1ba1db78a52a4161208ea403d3769ad73c6 -- 2.52.0