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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: , 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200504_225231_124092_6E131958 X-CRM114-Status: GOOD ( 15.86 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, alexandre.torgue@st.com, linux-kernel@vger.kernel.org, pierre-yves.mordret@st.com, alain.volmat@st.com, linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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 Reviewed-by: Pierre-Yves MORDRET --- 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);