From patchwork Mon Sep 4 13:47:01 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 809686 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xmB4T3vRZz9t2c for ; Mon, 4 Sep 2017 23:47:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753751AbdIDNrK (ORCPT ); Mon, 4 Sep 2017 09:47:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47502 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753574AbdIDNrJ (ORCPT ); Mon, 4 Sep 2017 09:47:09 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2B813745A5; Mon, 4 Sep 2017 13:47:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 2B813745A5 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=hdegoede@redhat.com Received: from shalem.localdomain.com (unknown [10.36.118.49]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6C392C0D8E; Mon, 4 Sep 2017 13:47:07 +0000 (UTC) From: Hans de Goede To: Darren Hart , Andy Shevchenko , Wolfram Sang , Guenter Roeck , Heikki Krogerus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org Subject: [PATCH v5 1/3] i2c: Allow overriding dev_name through board_info Date: Mon, 4 Sep 2017 15:47:01 +0200 Message-Id: <20170904134703.25663-2-hdegoede@redhat.com> In-Reply-To: <20170904134703.25663-1-hdegoede@redhat.com> References: <20170904134703.25663-1-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Mon, 04 Sep 2017 13:47:09 +0000 (UTC) Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org For devices not instantiated through ACPI the i2c-client's device-name gets set to - by default, e.g. "0-0022" this means that the device-name is dependent on the order in which the i2c-busses are enumerated. In some cases having a predictable constant device-name is desirable, for example on non device-tree platforms the link between a regulator and its consumers is specified by the platform code by setting regulator_init_data.consumers. This array identifies the regulator's consumers by dev_name and supply(-name). Which requires a constant dev_name. This commit adds a dev_name field to i2c_board_info allowing platform code to set a contstant dev_name so that the device can be identified by its dev_name in other platform code. Signed-off-by: Hans de Goede --- drivers/i2c/i2c-core-base.c | 10 ++++++++-- include/linux/i2c.h | 2 ++ 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 45fafcc88b93..5cdf3b947c23 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -672,10 +672,16 @@ static void i2c_adapter_unlock_bus(struct i2c_adapter *adapter, } static void i2c_dev_set_name(struct i2c_adapter *adap, - struct i2c_client *client) + struct i2c_client *client, + struct i2c_board_info const *info) { struct acpi_device *adev = ACPI_COMPANION(&client->dev); + if (info && info->dev_name) { + dev_set_name(&client->dev, "i2c-%s", info->dev_name); + return; + } + if (adev) { dev_set_name(&client->dev, "i2c-%s", acpi_dev_name(adev)); return; @@ -772,7 +778,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) client->dev.of_node = info->of_node; client->dev.fwnode = info->fwnode; - i2c_dev_set_name(adap, client); + i2c_dev_set_name(adap, client, info); if (info->properties) { status = device_add_properties(&client->dev, info->properties); diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 701ad26fa6b4..d3655cfe9a3e 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -310,6 +310,7 @@ static inline bool i2c_detect_slave_mode(struct device *dev) { return false; } * @type: chip type, to initialize i2c_client.name * @flags: to initialize i2c_client.flags * @addr: stored in i2c_client.addr + * @dev_name: Overrides the default - dev_name if set * @platform_data: stored in i2c_client.dev.platform_data * @archdata: copied into i2c_client.dev.archdata * @of_node: pointer to OpenFirmware device node @@ -334,6 +335,7 @@ struct i2c_board_info { char type[I2C_NAME_SIZE]; unsigned short flags; unsigned short addr; + const char *dev_name; void *platform_data; struct dev_archdata *archdata; struct device_node *of_node;