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 5CD7833EB1B; Tue, 14 Apr 2026 06:25:36 +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=1776147938; cv=none; b=gCpKunXisTFZ4sPtk50a+p0L1SFKHEGuyITtx4KOSIGaC3ip8SazYzvgzrI68A5hvsvmG1dfqXo3MPxeiYseQCVYRtEGw+3LHCYQLpRbVP1ULIow2Lv1E6/n27v4czUckRgyxK7ayNdi89ecFW1SbYUldUUS/Dpeq2l6bFaG4KE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776147938; c=relaxed/simple; bh=YfH3otYUPNpeAPZ1DPD5mKSRm4D4HznLLb9DnVMsQIE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=dmsmibCnpue8m0auYu60bCUk2kFAjCpTzra5gCKupoe/KBYSawIbNkee6WgDVFUR4Deu/ew3JzSfTpQg78/lVDNpLl2o7bllI3MmpV25ur751XpOa48sd1AMK5F8JNOWRcwhaq5SQQbUNgiEy7108tf8sCmLJNXezjCbuRQunx4= 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 [223.64.68.8]) by gateway (Coremail) with SMTP id _____8DxrOnW3d1pzGYAAA--.248S3; Tue, 14 Apr 2026 14:25:26 +0800 (CST) Received: from kernelserver (unknown [223.64.68.8]) by front1 (Coremail) with SMTP id qMiowJDxSMHR3d1pq7JsAA--.62093S2; Tue, 14 Apr 2026 14:25:23 +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 v8 0/2] i2c: Add Loongson-2K0300 I2C controller support Date: Tue, 14 Apr 2026 14:25:09 +0800 Message-ID: X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJDxSMHR3d1pq7JsAA--.62093S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/1tbiAgERCGnchacURgABse X-Coremail-Antispam: 1Uk129KBj93XoWxWF4DGF4kArW7Cw13JryUtwc_yoW5Zw1rpa y5C39xKF1qgr42vrs3JFWfur1SvayfJa1Sgr4xA34F9F4DZ3yUZ3ySkFs0vFWDAFWxCF42 qrZrKr10ka4DZFXCm3ZEXasCq-sJn29KB7ZKAUJUUUU5529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUv2b4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Jr0_Gr1l84ACjcxK6I8E87Iv67AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0cIa020Ex4CE44I27w Aqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jrv_JF1lYx0Ex4A2jsIE 14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCY1x0262kKe7 AKxVWUAVWUtwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02 F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GF ylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7Cj xVAFwI0_Jr0_Gr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r 1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Jr0_GrUvcSsGvfC2KfnxnUUI43ZEXa7IU8aZ X5UUUUU== 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. ====== V8: Patch (2/2): - Since the physical unit is specific, revert the change made in v7 to replace `MHz` with `mhz`. Link to V7: https://lore.kernel.org/all/cover.1775900045.git.zhoubinbin@loongson.cn/ V7: - Add Reviewed-by tag from Huacai & Andy, thanks. Patch (2/2): - Add the REGMAP_MMIO Kconfig dependency; - parent_rate_MHz -> parent_rate_mhz to avoid CamelCase. Link to V6: https://lore.kernel.org/all/cover.1773991081.git.zhoubinbin@loongson.cn/ V6: - Rebase on linux-i2c/i2c-next; Patch (2/2): - Update comment; - Use regmap_get_device(); Link to V5: https://lore.kernel.org/all/cover.1773142933.git.zhoubinbin@loongson.cn/ V5: - Rebase on linux-i2c/i2c-next; Patch (2/2): - Add time.h header file; - Add the `MHz` suffix to `parent_rate` and `freq`; - Define an iterator within the for loop, with its type being `unsigned int`; - Use dev_err_probe() in loongson2_i2c_adjust_bus_speed(); - i2c_adapter_set_node()->device_set_node(). Link to V4: https://lore.kernel.org/all/cover.1772714348.git.zhoubinbin@loongson.cn/ 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 | 11 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-ls2x-v2.c | 544 ++++++++++++++++++ 5 files changed, 561 insertions(+) create mode 100644 drivers/i2c/busses/i2c-ls2x-v2.c base-commit: 8fc326e15895c9f0403e6243dd4ad468b10aab3d -- 2.52.0