From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aleksey Makarov Subject: [PATCH 0/3] ACPI: parse the SPCR table Date: Mon, 25 Jan 2016 17:45:20 +0600 Message-ID: <1453722324-22407-1-git-send-email-aleksey.makarov@linaro.org> Return-path: Received: from mail-lf0-f52.google.com ([209.85.215.52]:33936 "EHLO mail-lf0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756591AbcAYLpd (ORCPT ); Mon, 25 Jan 2016 06:45:33 -0500 Received: by mail-lf0-f52.google.com with SMTP id 17so82762881lfz.1 for ; Mon, 25 Jan 2016 03:45:33 -0800 (PST) Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-serial@vger.kernel.org, Aleksey Makarov , Graeme Gregory , Russell King , Greg Kroah-Hartman , "Rafael J . Wysocki" , Leif Lindholm This patchset is based on the patchset by Leif Lindholm [1] 'ARM Server Base Boot Requirements' [2] mention SPCR (Serial Port Console Redirection Table) [3] as a mandatory ACPI table that specifies the configuration of serial console. Licensing concerns have prevented implementing it in the past, but as of 10 August 2015, these tables have both been released also under OWF 1.0 [4]. SPCR support is included in QEMU's ARM mach-virt since 2.4 release. Parse the SPCR table and check if any registered console match the description. If it does, enable that console. To implement that, introduce a new member int (*acpi_match)(struct console *, struct acpi_table_spcr *); of struct console. It allows drivers to check if they provide a matching console device. Also add an implementation of this member function to the pl011 driver and fix a minor issue in kernel/printk/printk.c [1] https://lkml.kernel.org/g/1441716217-23786-1-git-send-email-leif.lindholm@linaro.org [2] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044a/index.html [3] https://msdn.microsoft.com/en-us/library/windows/hardware/dn639132(v=vs.85).aspx [4] http://www.openwebfoundation.org/legal/the-owf-1-0-agreements/owfa-1-0 Aleksey Makarov (3): printk: make preferred_console local static bool ACPI: parse SPCR and enable matching console serial: pl011: add acpi_match for amba-pl011.c arch/arm64/Kconfig | 1 + drivers/acpi/Kconfig | 3 ++ drivers/acpi/Makefile | 1 + drivers/acpi/spcr.c | 85 +++++++++++++++++++++++++++++++++++++ drivers/tty/serial/amba-pl011.c | 14 ++++++ include/acpi/actbl2.h | 4 ++ include/linux/console.h | 12 ++++++ kernel/printk/printk.c | 94 +++++++++++++++++++++++++++++++---------- 8 files changed, 191 insertions(+), 23 deletions(-) create mode 100644 drivers/acpi/spcr.c -- 2.7.0