From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753276Ab2KLL7m (ORCPT ); Mon, 12 Nov 2012 06:59:42 -0500 Received: from ogre.sisk.pl ([193.178.161.156]:38673 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752770Ab2KLL7K (ORCPT ); Mon, 12 Nov 2012 06:59:10 -0500 From: "Rafael J. Wysocki" To: Mika Westerberg , mathias.nyman@linux.intel.com, linux-acpi@vger.kernel.org Cc: linux-kernel@vger.kernel.org, lenb@kernel.org, rafael.j.wysocki@intel.com, broonie@opensource.wolfsonmicro.com, grant.likely@secretlab.ca, linus.walleij@linaro.org, khali@linux-fr.org, Bjorn Helgaas Subject: [PATCH 0/3] Centralized parsing of ACPI device resources (was: Re: [PATCH 0/3] ACPI 5 support for GPIO, SPI and I2C) Date: Mon, 12 Nov 2012 12:51:32 +0100 Message-ID: <2429141.J1r7BIpiiT@vostro.rjw.lan> User-Agent: KMail/4.8.5 (Linux/3.7.0-rc5; KDE/4.8.5; x86_64; ; ) In-Reply-To: <1351928793-14375-1-git-send-email-mika.westerberg@linux.intel.com> References: <1351928793-14375-1-git-send-email-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Saturday, November 03, 2012 09:46:30 AM Mika Westerberg wrote: > Hi, > > With ACPI 5 we can now describe how devices are connected to their bus > using new resources: SPISerialBus and I2CSerialBus. Also it is now possible > to add GPIO connections for the devices with the help of GpioIO and GpioInt > resources. > > This series adds support for these new resources. > > The series based on the ACPI 5 enumeration support patches that are available > on Rafael's linux-next branch: > > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next > > Specifically patches from this thread: > > https://lkml.org/lkml/2012/10/31/154 > > Since these patches depend on the above patches on Rafael's linux-next branch > I suggest that these be merged via that branch, if there are no objections. > > The series follows the Device Tree way so that it would be easy to add ACPI > support for the existing SPI and I2C drivers if one is familiar how the > corresponding DT support is done. > > For GPIO we introduce a function that maps between ACPI GPIO numbers and Linux > ones - acpi_get_gpio(). > > SPI slave devices gets enumerated automatically if the master device has > master->dev.acpi_handle set (this is analogous to master->dev.of_mode). The > platform bus code in Rafael's branch assigns the ACPI handle to the master > device. > > I2C slave devices can be enumerated by calling acpi_i2c_register_devices() in > the adapter driver. Following the previous discussion, the patches below move some ACPI resources parsing code from drivers/pnp/pnpacpi/rsparser.c to a new file drivers/acpi/resource.c and reformat it so that it can be used by other subsystems (patch [1/3]), convert the new ACPI platform devices creation code to use the routines in drivers/acpi/resource.c instead of doing its own resource parsing (patch [2/3]) and make the ACPI namespace scan attach a list of _CRS resources to each struct acpi_device it creates, where applicable (patch [3/3] - the ACPI platform device code is converted to use that instead of executing _CRS by itself via acpi_walk_resources()). The patchset is on top of the current linux-pm.git/linux-next branch and has been tested somewhat. Please let me know if you find any problems in it. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.