From patchwork Tue May 5 05:51:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 207656 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9C42C47247 for ; Tue, 5 May 2020 05:52:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B23E6206E6 for ; Tue, 5 May 2020 05:52:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="CI9ezify" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727849AbgEEFwg (ORCPT ); Tue, 5 May 2020 01:52:36 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:53708 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726635AbgEEFwf (ORCPT ); Tue, 5 May 2020 01:52:35 -0400 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0455l5X6027087; Tue, 5 May 2020 07:52:21 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=Tkcg9s1uDu/OOadkPkeZF9B5T6AZFP5XkTZX0ihRw8k=; b=CI9ezifyJBfwqbQsaqh8o4ZvjtLehvt6i+UNxWZruakeg+8UXPU8iIljCfAl2KVQJ1/I b7KdHpzD+ozDtarb4Ou6q1PF0xZwyYg6pZ44B4FGtb7Y+FcvtXgHsTeBYkpWqCO9xvwn uhqvf3cOHrc9JjHnOvbrbUocT261I/IjtHTNis2kjzCbjRCyS0A41bAUs2Fl5w72Q7zD 4bbzJ+We2jRW6vq99a977sOBtW2x4rrvzBlioYSo68LpaATZ9ifQW3M0whIjxxOpGbGn aUksql+sktcTaYKQYzYFh62CrDq/eb1PzSCT3OK74teuej2K11aEqZdIxA5dVrwuftU2 yQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 30rxb1wy0p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 05 May 2020 07:52:21 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id D1E57100039; Tue, 5 May 2020 07:52:20 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id C3EA721CA81; Tue, 5 May 2020 07:52:20 +0200 (CEST) Received: from localhost (10.75.127.48) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 5 May 2020 07:52:20 +0200 From: Alain Volmat To: , CC: , , , , , , , , , , Subject: [PATCH 2/4] i2c: addition of client reg/unreg callbacks Date: Tue, 5 May 2020 07:51:09 +0200 Message-ID: <1588657871-14747-3-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1588657871-14747-1-git-send-email-alain.volmat@st.com> References: <1588657871-14747-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.48] X-ClientProxiedBy: SFHDAG6NODE3.st.com (10.75.127.18) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-05-05_02:2020-05-04,2020-05-05 signatures=0 Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Addition of two callbacks reg_client and unreg_client that can be implemented by adapter drivers in order to take action whenever a client is being registered to it. Signed-off-by: Alain Volmat --- drivers/i2c/i2c-core-base.c | 11 +++++++++++ include/linux/i2c.h | 6 ++++++ 2 files changed, 17 insertions(+) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 2e4560671183..4c84c6264314 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -319,6 +319,12 @@ static int i2c_device_probe(struct device *dev) if (!client) return 0; + if (client->adapter->algo->reg_client) { + status = client->adapter->algo->reg_client(client); + if (status) + return status; + } + driver = to_i2c_driver(dev->driver); client->irq = client->init_irq; @@ -417,6 +423,8 @@ static int i2c_device_probe(struct device *dev) put_sync_adapter: if (client->flags & I2C_CLIENT_HOST_NOTIFY) pm_runtime_put_sync(&client->adapter->dev); + if (client->adapter->algo->reg_client) + client->adapter->algo->unreg_client(client); return status; } @@ -445,6 +453,9 @@ static int i2c_device_remove(struct device *dev) if (client->flags & I2C_CLIENT_HOST_NOTIFY) pm_runtime_put(&client->adapter->dev); + if (client->adapter->algo->unreg_client) + client->adapter->algo->unreg_client(client); + return status; } diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 45d36ba4826b..61b838caf454 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -509,6 +509,8 @@ i2c_register_board_info(int busnum, struct i2c_board_info const *info, * so e.g. PMICs can be accessed very late before shutdown. Optional. * @functionality: Return the flags that this algorithm/adapter pair supports * from the ``I2C_FUNC_*`` flags. + * @reg_client: Callback informing that a new client is being registered + * @unreg_client: Callback informing that a client is being removed * @reg_slave: Register given client to I2C slave mode of this adapter * @unreg_slave: Unregister given client from I2C slave mode of this adapter * @@ -545,6 +547,10 @@ struct i2c_algorithm { /* To determine what the adapter supports */ u32 (*functionality)(struct i2c_adapter *adap); + /* To inform the adapter of the probe/remove of a client */ + int (*reg_client)(struct i2c_client *client); + void (*unreg_client)(struct i2c_client *client); + #if IS_ENABLED(CONFIG_I2C_SLAVE) int (*reg_slave)(struct i2c_client *client); int (*unreg_slave)(struct i2c_client *client);