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 0098C20C037 for ; Sat, 11 Oct 2025 07:17:19 +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=1760167043; cv=none; b=VmLybCMn5K0LzaoNbrjxisEteA4L6YnNkpkkiTY4iJDIuBcoF/l+Y0iVZnYQ129MKY1RTXgDO9zgpFXrdwa35tLttpI4tJULDXUg/sJeMEc6gNGfuXFNWXdvitbxdXXzHtHztQZdB0cQdP+gRDw5JEWN6O5UJP6dg4ArDbq3nWA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760167043; c=relaxed/simple; bh=+Mj4pLHcm8CzEjjf9CVygVK6WkVlpnUMtolb4803yOg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bIMnWUMGY1F3k7Yi8I2FCVqeCVZGNBqHyDsA5kStv5ZtK9JGp8SOtSiM05Ue4FSoSuisE/EYecdDT2p7ZXM4b/GFOugP40Xuqv/JwajGMD8e/wm7zrjH83qFdhGI2kSmVkm1M1JuOEOPElEQiyNGEyVOupLM1rwiSrKRfB+D43g= 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 [223.64.68.198]) by gateway (Coremail) with SMTP id _____8Bx3795BOpoXfkUAA--.43205S3; Sat, 11 Oct 2025 15:17:13 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.68.198]) by front1 (Coremail) with SMTP id qMiowJDxaMBwBOpo1ebZAA--.1011S2; Sat, 11 Oct 2025 15:17:06 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Greg Kroah-Hartman , Jiri Slaby , Haowei Zheng Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, ilpo.jarvinen@linux.intel.com, linux-serial@vger.kernel.org, Binbin Zhou Subject: [PATCH v6 0/3] uart: Introduce uart driver for the Loongson family Date: Sat, 11 Oct 2025 15:16:46 +0800 Message-ID: X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJDxaMBwBOpo1ebZAA--.1011S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/1tbiAgEMCGjp8Y8BBgAAs- X-Coremail-Antispam: 1Uk129KBj93XoWxWw4xGr4fAw4kXw15KFyxCrX_yoW5XFWfpF sI9ayqkrs5tF1xAws3JFWruF45Zry5JF9FgFsrGw1UW39Yvw1UXr4ft3ZIyF13ArZYqr42 qF48CrWUGFyUZ3cCm3ZEXasCq-sJn29KB7ZKAUJUUUU7529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBFb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1q6r4UM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v2 6F4UJVW0owAaw2AFwI0_Jrv_JF1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0c Ia020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jw0_ WrylYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwI xGrwCY1x0262kKe7AKxVWUAVWUtwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWU JVW8JwCFI7km07C267AKxVWUXVWUAwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4 vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IY x2IY67AKxVW5JVW7JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26c xKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAF wI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07UN6p9UUUUU= Hi all: For various reasons, I will be taking over from Haowei and continuing to push forward with this patch set. Thanks to Haowei for his efforts so far. This patchset introduce a generic UART framework driver for Loongson family. It can be found on Loongson3 series cpus, Loongson-2K series cpus and Loongson LS7A bridge chips. Thanks. ------ V6: Patch-1: - Add Conor's Acked-by tag, thanks. Patch-2: - Add more missing #include; - Convert mcr_invert/msr_invert from int to u8; - Split serial_fixup() on a preceding line; - Add macro definition to avoid magic numbers, such as LOONGSON_QUOT_FRAC_MASK; - Rework the relevant data structures, where `loongson_uart_ddata` represents the Soc's driver_data; - Drop `PORT_LOONGSON` and use PORT_16550A instead. - devm_platform_get_and_ioremap_resource() instead of platform_get_resource(); - Use uart_read_port_properties() and parse the clock attributes; - Use switch-case instead of if-else in serial_fixup(). Link to V5: https://lore.kernel.org/all/cover.1758676290.git.zhoubinbin@loongson.cn/ V5: Patch-1: - Since the Loongson UART is NS8250A-compatible, simply add ls2k* compatible to 8250.yaml. DTS{i} tested by `make dtbs_check W=1` Link to V4: https://lore.kernel.org/all/cover.1757318368.git.zhoubinbin@loongson.cn/ V4: Patch-1: - Rename binding name from loongson,uart.yaml to loongson,ls2k0500-uart.yaml; - Drop ls7a compatible; - According to the manual, ls3a and ls2k uart are the same, so merge their compatible. Patch-2: - Format code; - Add the LOONGSON_UART_DLF macro definition to avoid magic numbers; - Simplify the code, merge flags and quirks, and remove struct loongson_uart_config; - Use DEFINE_SIMPLE_DEV_PM_OPS; - Drop loongson,ls7a-uart compatible. Patch-3: - Add ls2k* compatible string, and ns16550a as the fallback compatible. Link to V3: https://lore.kernel.org/all/20240826024705.55474-1-zhenghaowei@loongson.cn/ Binbin Zhou (3): dt-bindings: serial: 8250: Add Loongson uart compatible serial: 8250: Add Loongson uart driver support LoongArch: dts: Add uart new compatible string .../devicetree/bindings/serial/8250.yaml | 14 ++ arch/loongarch/boot/dts/loongson-2k0500.dtsi | 2 +- arch/loongarch/boot/dts/loongson-2k1000.dtsi | 2 +- arch/loongarch/boot/dts/loongson-2k2000.dtsi | 2 +- drivers/tty/serial/8250/8250_loongson.c | 238 ++++++++++++++++++ drivers/tty/serial/8250/Kconfig | 10 + drivers/tty/serial/8250/Makefile | 1 + 7 files changed, 266 insertions(+), 3 deletions(-) create mode 100644 drivers/tty/serial/8250/8250_loongson.c base-commit: 0d97f2067c166eb495771fede9f7b73999c67f66 -- 2.47.3