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 1E1B13D9541; Fri, 9 Oct 2026 09:19:56 +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=1791537599; cv=none; b=dCpiqzyJbFI4AvA2rvMxxyEpq75rMhnpUDmmtRpycsB+larx3qkinOqCgyXyQ307cAEsIHVafjTTy2uCA7+dvf7LMQht4qsjY+wggpg/60gBQ0QLraER5eiFTPQE7fFmgHQMgEq3oGqPr8FuMVDL9o9lI8mswX9y25Obzim5hqs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791537599; c=relaxed/simple; bh=nhG3/rieSjC5NNr0qWIYRx/E2bze2PWXFEaFpLXt8rE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=uVMyiPeqKVzwfzYu/YPsgn3OfIuLHEefShffi7WKXB1lCIdHijLjvQ3GNpbFMBoKIx5TqIM9rJTT4bwfcmWEfYFZSQe8fONnPWNwBo6+lDWJuoydjcjwyBj3zV88Jr/LiWSnHwHohPf5yx0vBIsrUDTbQtMtiTRmG+f1+/wQHKM= 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 [223.64.68.159]) by gateway (Coremail) with SMTP id _____8CxutG7schqZhUUAA--.58736S3; Fri, 09 Oct 2026 17:19:55 +0800 (CST) Received: from kernelserver (unknown [223.64.68.159]) by front1 (Coremail) with SMTP id qMiowJDxBc22schqA2cqAA--.61825S2; Fri, 09 Oct 2026 17:19:51 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , Frank Li , dmaengine@vger.kernel.org Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, devicetree@vger.kernel.org, Keguang Zhang , Binbin Zhou Subject: [PATCH v2 0/3] Add Loongson-2K0300 APB DMA mux support Date: Fri, 9 Oct 2026 17:19:31 +0800 Message-ID: X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJDxBc22schqA2cqAA--.61825S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/1tbiAQEPCGrIS3YGyAAAsW X-Coremail-Antispam: 1Uk129KBj93XoW7CF1DZFW8XFW8uw18JF13trc_yoW8try5pa 9xC3yakFyUtFy7Aws5Ja48Zr4rZ3sxJa42gayaqw1qka9xG34qq3WIyF1jvr17Cr18AFW2 vFykCFW8GF17ZrcCm3ZEXasCq-sJn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUkSb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Jr0_Gr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6xACxx 1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r106r15McIj6I8E87Iv 67AKxVWxJVW8Jr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxAIw28Icx kI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2Iq xVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42 IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwCI42IY 6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Cr0_Gr1UMIIF0xvEx4A2js IEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjxUFyCJUUUUU Hi all: Loongson-2K0300 integrates a CMC DMA controller with 8 physical channels. Peripheral DMA requests are not hard-wired to these channels; they are routed through the CHIP_CTRL13/14/15 DMA_MAP fields. This series adds support for that DMA request router. Patch 1 adds the DT binding constants for the peripheral request IDs. Patch 2 adds the DT binding documentation for the DMA mux. Patch 3 adds the driver, Kconfig symbol and Makefile entry. The driver registers with of_dma_router_register(). In the route allocation callback it validates the specifier, programs the SoC-specific route register, and forwards to the parent CMC DMA controller. Thanks. Binbin. ========= V2: Patch(1/3): - Drop LS2K0300_DMA_REQ_MAX as it is not part of the ABI; Patch(2/3): - More detailed description of `dma-cells`; - Add the `dma_requests` constraint Patch(3/3): - Drop loongson2_dmamux_map->shift; - Move of_parse_phandle() into loongson2_dmamux_route_allocate() avoid UAF; - Drop loongson2_dmamux->dma_np; - Check dma_requests; - Add devm_add_action_or_reset() instead of .remove(); - Replace `metux()` with `spinlock()`, which has lower overhead; - Add loongson2_dmamux_route_free(). Link to V1: https://lore.kernel.org/all/cover.1790068409.git.zhoubinbin@loongson.cn/ Binbin Zhou (3): dt-bindings: dma: loongson: Add Loongson-2 DMA mux request IDs dt-bindings: dma: loongson: Add Loongson-2K0300 DMA mux support dmaengine: loongson: Add Loongson-2K0300 APB DMA mux driver .../dma/loongson,ls2k0300-dmamux.yaml | 72 ++++ MAINTAINERS | 3 + drivers/dma/loongson/Makefile | 1 + drivers/dma/loongson/loongson2-apb-dmamux.c | 398 ++++++++++++++++++ .../dt-bindings/dma/loongson,ls2k-dmamux.h | 53 +++ 5 files changed, 527 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/loongson,ls2k0300-dmamux.yaml create mode 100644 drivers/dma/loongson/loongson2-apb-dmamux.c create mode 100644 include/dt-bindings/dma/loongson,ls2k-dmamux.h base-commit: 1d8ae2003de08f61095e4e928b1b8cce6c23cabd -- 2.52.0