From patchwork Tue Apr 16 03:16:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guanbing Huang X-Patchwork-Id: 790139 Received: from mail-pf1-f169.google.com (mail-pf1-f169.google.com [209.85.210.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8963315AF6; Tue, 16 Apr 2024 03:17:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.169 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713237435; cv=none; b=Uzba+73RwhtTRIav/7Rpx9XIutMeIgnlIq0G+nR9gniS8tOJvnJMJY8gvmZHIg6yYXTfKEU/ky1gS7bu+P6/1nY/bofIzvPKEMEL58XSIdM5bpE8V2W0cB+9TEE+S6An8dBopd3ILyal3rkr/cMWrf2DfemsZQ4xymiSKgTmRmY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713237435; c=relaxed/simple; bh=9CKw6Ns0L5YcJd4x32/1S2dc5YX3XZimEZZwa+KRFmQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=I1zUh9bDQDbNDdsMHptuPjyMB2NnTOwDGOg5gkTYvb40sVEvSPoKoPQ0HHqX43RdgCPVqotdjkorySJTwcWyMJsv6/WdcLy0wJCmPkeyw1LX+dN/6GVPXVZIrOMJ7TrLCoE6DpXUaHJ2CWVaLlKNbaEROhl0Lz7H2gfonWQZ/jo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=kcR4q1ln; arc=none smtp.client-ip=209.85.210.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kcR4q1ln" Received: by mail-pf1-f169.google.com with SMTP id d2e1a72fcca58-6ed32341906so3456160b3a.1; Mon, 15 Apr 2024 20:17:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1713237434; x=1713842234; darn=vger.kernel.org; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=KtroaYqcnyMYBjqOiDrOLUzCkiqYy/oQzAEHksV6GfE=; b=kcR4q1lnlfXuS4UMeH5f5vkE2Up1kCIW9DT8HeL8/NPdWL/HhkBMaLOO3NxLf7QNSU mWuJk+pUQT8YMhtF7laMzm+zlgs5vg2oSA6cMMpmEeYj4HR/wVj9dygxnYbsIpQG4kTZ IBljhm6tqgKcocwhjtvQTUmMGyxTXAd9VoUu3GcAM843TldtU6UbCLkqSP3xmEhYD1UL YiBUzU72BY8sI2vE6jfB+AHIlV2E9bVbrag23iziaMe4zbFbAyJ3flGSdAzCa7EMlKIE EOuPztqCni/0WY0ybFBLbBrhME+HdGIt+2sB4POKXXFC9PHzxAa1eWG8+l97W+kXSGgR N/YQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713237434; x=1713842234; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=KtroaYqcnyMYBjqOiDrOLUzCkiqYy/oQzAEHksV6GfE=; b=EE7XtO+RkhiXHeWPhPJGtQaw5ddK88Iw6cTi06Lzqtx7fjsn57eBrXT2lLai73RaDh khEOp/Riw5+hBAvo1cSh7rwA7K/adIvP+ZfFVcNmvBFNx/OzezVg5RdSVTgdNrf9Mq5I OLoriw8DopF4UMf1iRQpZQDkhTLarkatQxclY8uoi0XOVEguUhsqCODosah5kaMeOl7F +EFNsAQf6F+u8OkmUG8YOK0wmiw7xkG0QdcNPN3jjGfQSyQ6yzC71sviAYlDlCxLOU48 okTs9HeAcu1TGMH4SQYJfKlt6VDdCG8k20zOpohQ+zOQ7Vc0eqdebelv0S5eSepJcEv0 0vzg== X-Forwarded-Encrypted: i=1; AJvYcCWjQGzBtVPvMXl8UFK6pfLeTAOcivw1BCOfbhFKWBGi0aWJOy5VE7431KESQ/igSd71Ee9nf5gTIBuFJbD81N2EfU/bBsWAQPzN/lGrKw6jn2tFL74h/nY/c9KRpLDYWEKmJInFSv27sBo1 X-Gm-Message-State: AOJu0YyHmRPYc8ryEkIoROBW/rEs10S2/PKTLfg2IurIq3UP1GO2COEV 6Jc+VyMdo3CXQMaLfzlNMOJKxeJd35de5HofsNBsFQr6xrsNi1DI X-Google-Smtp-Source: AGHT+IGZ+pHtvHVAPYrf1SMPpr7pKM/v8Z0oeVFJ8UiC0oaGbmOZGtsexEtbO9Nc7cRX4xEeBcD7jQ== X-Received: by 2002:a05:6a20:3244:b0:1a7:59b5:4276 with SMTP id hm4-20020a056a20324400b001a759b54276mr8858620pzc.54.1713237433780; Mon, 15 Apr 2024 20:17:13 -0700 (PDT) Received: from localhost.localdomain ([43.159.199.34]) by smtp.gmail.com with ESMTPSA id n4-20020a17090a5a8400b002a5d684a6a7sm8658616pji.10.2024.04.15.20.17.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Apr 2024 20:17:13 -0700 (PDT) From: Guanbing Huang To: gregkh@linuxfoundation.org, andriy.shevchenko@intel.com, rafael.j.wysocki@intel.com Cc: linux-acpi@vger.kernel.org, tony@atomide.com, john.ogness@linutronix.de, yangyicong@hisilicon.com, jirislaby@kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, lvjianmin@loongson.cn, albanhuang@tencent.com, tombinfan@tencent.com Subject: [PATCH v8 3/3] serial: 8250_pnp: Support configurable reg shift property Date: Tue, 16 Apr 2024 11:16:59 +0800 Message-Id: <4726ecea8f7bfbfe42501b4f6ad9fe5b38994574.1713234515.git.albanhuang@tencent.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: From: Guanbing Huang The 16550a serial port based on the ACPI table requires obtaining the reg-shift attribute. In the ACPI scenario, If the reg-shift property is not configured like in DTS, the 16550a serial driver cannot read or write controller registers properly during initialization. Signed-off-by: Guanbing Huang Suggested-by: Andy Shevchenko Reviewed-by: Andy Shevchenko Reviewed-by: Bing Fan Tested-by: Linheng Du --- v6 -> v7: add a "Reviewed-by" tag v5 -> v6: fix the issue that the cover letter is not chained with the patch series v4 -> v5: modify to obtain the value of mapsize through the pnp_mem_len function, add annotations for the iotype variable, delete excess uart.port.flags operation v3 -> v4: dependent on two pre patches: "pnp: Add dev_is_pnp() macro" and "serial: 8250_port: Add support of pnp irq to __uart_read_properties()", the iotype is reserved, the mapsize is initialized, fix the UPF_SHARE_IRQ flag, check for IRQ being absent v2 -> v3: switch to use uart_read_port_properties(), change "Signed-off-by" to "Reviewed-by" and "Tested-by" v1 -> v2: change the names after "Signed off by" to the real names drivers/tty/serial/8250/8250_pnp.c | 40 +++++++++++++++++++----------- 1 file changed, 25 insertions(+), 15 deletions(-) diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c index 1974bbadc975..8f72a7de1d1d 100644 --- a/drivers/tty/serial/8250/8250_pnp.c +++ b/drivers/tty/serial/8250/8250_pnp.c @@ -435,6 +435,7 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) { struct uart_8250_port uart, *port; int ret, line, flags = dev_id->driver_data; + unsigned char iotype; if (flags & UNKNOWN_DEV) { ret = serial_pnp_guess_board(dev); @@ -443,37 +444,46 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) } memset(&uart, 0, sizeof(uart)); - if (pnp_irq_valid(dev, 0)) - uart.port.irq = pnp_irq(dev, 0); if ((flags & CIR_PORT) && pnp_port_valid(dev, 2)) { uart.port.iobase = pnp_port_start(dev, 2); - uart.port.iotype = UPIO_PORT; + iotype = UPIO_PORT; } else if (pnp_port_valid(dev, 0)) { uart.port.iobase = pnp_port_start(dev, 0); - uart.port.iotype = UPIO_PORT; + iotype = UPIO_PORT; } else if (pnp_mem_valid(dev, 0)) { uart.port.mapbase = pnp_mem_start(dev, 0); - uart.port.iotype = UPIO_MEM; + uart.port.mapsize = pnp_mem_len(dev, 0); + iotype = UPIO_MEM; uart.port.flags = UPF_IOREMAP; } else return -ENODEV; - dev_dbg(&dev->dev, - "Setup PNP port: port %#lx, mem %#llx, irq %u, type %u\n", - uart.port.iobase, (unsigned long long)uart.port.mapbase, - uart.port.irq, uart.port.iotype); + uart.port.uartclk = 1843200; + uart.port.dev = &dev->dev; + uart.port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; + + ret = uart_read_port_properties(&uart.port); + /* no interrupt -> fall back to polling */ + if (ret == -ENXIO) + ret = 0; + if (ret) + return ret; + + /* + * The previous call may not set iotype correctly when reg-io-width + * property is absent and it doesn't support IO port resource. + */ + uart.port.iotype = iotype; if (flags & CIR_PORT) { uart.port.flags |= UPF_FIXED_PORT | UPF_FIXED_TYPE; uart.port.type = PORT_8250_CIR; } - uart.port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; - if (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE) - uart.port.flags |= UPF_SHARE_IRQ; - uart.port.uartclk = 1843200; - device_property_read_u32(&dev->dev, "clock-frequency", &uart.port.uartclk); - uart.port.dev = &dev->dev; + dev_dbg(&dev->dev, + "Setup PNP port: port %#lx, mem %#llx, size %#llx, irq %u, type %u\n", + uart.port.iobase, (unsigned long long)uart.port.mapbase, + (unsigned long long)uart.port.mapsize, uart.port.irq, uart.port.iotype); line = serial8250_register_8250_port(&uart); if (line < 0 || (flags & CIR_PORT))