From patchwork Wed Aug 12 22:06:26 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 506777 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 6881B140338 for ; Thu, 13 Aug 2015 08:07:00 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751954AbbHLWGv (ORCPT ); Wed, 12 Aug 2015 18:06:51 -0400 Received: from eu-smtp-delivery-143.mimecast.com ([146.101.78.143]:60420 "EHLO eu-smtp-delivery-143.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751617AbbHLWGu (ORCPT ); Wed, 12 Aug 2015 18:06:50 -0400 Received: from cam-owa1.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.140]) by eu-smtp-1.mimecast.com with ESMTP id uk-mta-7-vVZ9ODTWRLSGsVRO4hZo5A-1; Wed, 12 Aug 2015 23:06:48 +0100 Received: from mammon-v1.localdomain.com ([10.1.2.79]) by cam-owa1.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 12 Aug 2015 23:06:48 +0100 From: Jeremy Linton To: linux-arm-kernel@lists.infradead.org Cc: netdev@vger.kernel.org, steve.glendinning@shawell.net, rafael.j.wysocki@intel.com, grant.likely@linaro.org, Suravee.Suthikulpanit@amd.com, Catalin.Marinas@arm.com, Jeremy Linton Subject: [PATCH 1/2] Add a matching set of device_ functions for determining mac/phy Date: Wed, 12 Aug 2015 17:06:26 -0500 Message-Id: <1439417187-21411-2-git-send-email-jeremy.linton@arm.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1439417187-21411-1-git-send-email-jeremy.linton@arm.com> References: <1439417187-21411-1-git-send-email-jeremy.linton@arm.com> X-OriginalArrivalTime: 12 Aug 2015 22:06:48.0334 (UTC) FILETIME=[2F1B82E0:01D0D54B] X-MC-Unique: vVZ9ODTWRLSGsVRO4hZo5A-1 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org OF has some helper functions for parsing MAC and PHY settings. In cases where the platform is providing this information rather than the device itself, there needs to be similar functions for ACPI. These functions are slightly modified versions of the ones in of_net which can use information provided via DT or ACPI. Signed-off-by: Jeremy Linton --- drivers/base/property.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/property.h | 4 +++ 2 files changed, 77 insertions(+) diff --git a/drivers/base/property.c b/drivers/base/property.c index f3f6d16..2e8cd14 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include /** * device_add_property_set - Add a collection of properties to a device object. @@ -533,3 +535,74 @@ bool device_dma_is_coherent(struct device *dev) return coherent; } EXPORT_SYMBOL_GPL(device_dma_is_coherent); + +/** + * device_get_phy_mode - Get phy mode for given device_node + * @dev: Pointer to the given device + * + * The function gets phy interface string from property 'phy-mode' or + * 'phy-connection-type', and return its index in phy_modes table, or errno in + * error case. + */ +int device_get_phy_mode(struct device *dev) +{ + const char *pm; + int err, i; + + err = device_property_read_string(dev, "phy-mode", &pm); + if (err < 0) + err = device_property_read_string(dev, + "phy-connection-type", &pm); + if (err < 0) + return err; + + for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) + if (!strcasecmp(pm, phy_modes(i))) + return i; + + return -ENODEV; +} +EXPORT_SYMBOL_GPL(device_get_phy_mode); + +static void *device_get_mac_addr(struct device *dev, + const char *name, char *addr, + int alen) +{ + int ret = device_property_read_u8_array(dev, name, addr, alen); + + if (ret == 0 && is_valid_ether_addr(addr)) + return addr; + return NULL; +} + +/** + * Search the device tree for the best MAC address to use. 'mac-address' is + * checked first, because that is supposed to contain to "most recent" MAC + * address. If that isn't set, then 'local-mac-address' is checked next, + * because that is the default address. If that isn't set, then the obsolete + * 'address' is checked, just in case we're using an old device tree. + * + * Note that the 'address' property is supposed to contain a virtual address of + * the register set, but some DTS files have redefined that property to be the + * MAC address. + * + * All-zero MAC addresses are rejected, because those could be properties that + * exist in the device tree, but were not set by U-Boot. For example, the + * DTS could define 'mac-address' and 'local-mac-address', with zero MAC + * addresses. Some older U-Boots only initialized 'local-mac-address'. In + * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists + * but is all zeros. +*/ +void *device_get_mac_address(struct device *dev, char *addr, int alen) +{ + addr = device_get_mac_addr(dev, "mac-address", addr, alen); + if (addr) + return addr; + + addr = device_get_mac_addr(dev, "local-mac-address", addr, alen); + if (addr) + return addr; + + return device_get_mac_addr(dev, "address", addr, alen); +} +EXPORT_SYMBOL(device_get_mac_address); diff --git a/include/linux/property.h b/include/linux/property.h index 76ebde9..a59c6ee 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -166,4 +166,8 @@ void device_add_property_set(struct device *dev, struct property_set *pset); bool device_dma_is_coherent(struct device *dev); +int device_get_phy_mode(struct device *dev); + +void *device_get_mac_address(struct device *dev, char *addr, int alen); + #endif /* _LINUX_PROPERTY_H_ */