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 6FA00368291 for ; Mon, 27 Apr 2026 07:19:53 +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=1777274397; cv=none; b=qU3zpqbsczCvdvNpu3ZEi6jCnhBTInvw6O4WvW4f7vdiOcLIKfoF0RYTALGTYGgCMm7SNM1p204ui2QuAPi2H7151L9t5V3jsdCjaBe5WYBn9bvjC/NUgtu52qAmEpasbDHCqgY8ImlCiIA7SEIITsclhu0v4VDY+aj16vVm+KQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777274397; c=relaxed/simple; bh=96BJvE6/iPLIOCZXP5PQGTbpMwT+AKMCvO+f9la0JiY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=EgKYLU1fmZtzMsXuwhqr6qxwL6douJbes6uDtHZRRlGAQdVlhu8zgSlxqpPsG99zJVwwkZxw1q29/G5hXX3boW91H2NRVrcLUyPqTtqv5VcGERwgYu6fM+uyIC4vF1gXdlqG0vT7LS8FLmOveG1n4U2ymJrffcK2fG4DrQLHTEo= 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 _____8CxReiyDe9pZ0MEAA--.8569S3; Mon, 27 Apr 2026 15:18:10 +0800 (CST) Received: from kernelserver (unknown [223.64.68.8]) by front1 (Coremail) with SMTP id qMiowJCxWeCvDe9p0pJ1AA--.27085S2; Mon, 27 Apr 2026 15:18:08 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Marc Kleine-Budde , Vincent Mailhol , Bingxiong Li Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, linux-can@vger.kernel.org, jeffbai@aosc.io, Binbin Zhou Subject: [PATCH 0/2] Add Loongson CAN-FD controller driver Date: Mon, 27 Apr 2026 15:17:58 +0800 Message-ID: X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-can@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJCxWeCvDe9p0pJ1AA--.27085S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/1tbiAgEKCGnu+qgB9wAAsi X-Coremail-Antispam: 1Uk129KBj93XoW7KF13Gw1ktFyxWry7Ar4fJFc_yoW8WF4Upa 1Fk3sxur13tr47Aws3JFW5CF15CFyrJrW7Ga9xXw10v3sFya47WryakF1UAr42vr15CFyj qrWruF48WF15GFgCm3ZEXasCq-sJn29KB7ZKAUJUUUUr529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUU90b4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1ln4kS14v26r1Y6r17M2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12 xvs2x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1Y 6r17McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64 vIr41l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxYO2xFxVAFwI0_ Jrv_JF1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1V AY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAI cVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42 IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r1j6r4UYxBIdaVFxhVj vjDU0xZFpf9x07jepB-UUUUU= Hi all: This patchset adds support for the CAN-FD controller found on Loongson CPUs. Patch 1 introduces the basic CAN-FD controller driver with support for classic CAN and CAN FD, including bit timing, error handling, NAPI-based RX, and multiple TX buffers. Patch 2 adds optional DMA support for RX path using the Loongson APB CMC DMA engine, which significantly reduces CPU load under high receive throughput. The driver has been tested on Loongson-2K3000 platforms with various CAN/CAN FD traffic patterns. Finally, I'd like to thank Binxiong, the original author of this driver, for his efforts in working on the patch. Thanks. Binbin Binbin Zhou (2): can: Add Loongson CAN-FD controller support can: loongson_canfd: Add RXDMA support MAINTAINERS | 7 + drivers/net/can/Kconfig | 1 + drivers/net/can/Makefile | 1 + drivers/net/can/loongson_canfd/Kconfig | 16 + drivers/net/can/loongson_canfd/Makefile | 6 + .../net/can/loongson_canfd/loongson_canfd.c | 1298 +++++++++++++++++ .../loongson_canfd/loongson_canfd_kframe.h | 142 ++ .../can/loongson_canfd/loongson_canfd_kregs.h | 315 ++++ 8 files changed, 1786 insertions(+) create mode 100644 drivers/net/can/loongson_canfd/Kconfig create mode 100644 drivers/net/can/loongson_canfd/Makefile create mode 100644 drivers/net/can/loongson_canfd/loongson_canfd.c create mode 100644 drivers/net/can/loongson_canfd/loongson_canfd_kframe.h create mode 100644 drivers/net/can/loongson_canfd/loongson_canfd_kregs.h base-commit: f1359c240191e686614847905fc861cbda480b47 -- 2.52.0