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Thu, 25 Jun 2020 09:39:51 +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 31E71100038; Thu, 25 Jun 2020 09:39:51 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 267142A82E2; Thu, 25 Jun 2020 09:39:51 +0200 (CEST) Received: from localhost (10.75.127.49) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 25 Jun 2020 09:39:50 +0200 From: Alain Volmat To: , Subject: [PATCH v2 2/4] i2c: addition of client hnotify reg/unreg callbacks Date: Thu, 25 Jun 2020 09:39:27 +0200 Message-ID: <1593070769-9106-3-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1593070769-9106-1-git-send-email-alain.volmat@st.com> References: <1593070769-9106-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG6NODE1.st.com (10.75.127.16) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-25_03:2020-06-25, 2020-06-25 signatures=0 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Addition of two callbacks reg_hnotify_cli and unreg_hnotify_cli that can be implemented by adapter drivers in order to take action whenever a client with HOST_NOTIFY flag is being registered to it. Signed-off-by: Alain Volmat --- v2: replace generic client reg/unreg callbacks with host-notify client reg/unreg callbacks drivers/i2c/i2c-core-base.c | 18 ++++++++++++++++-- include/linux/i2c.h | 8 ++++++++ 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 26f03a14a478..46745e403e98 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -319,6 +319,14 @@ static int i2c_device_probe(struct device *dev) if (!client) return 0; + if (client->flags & I2C_CLIENT_HOST_NOTIFY) { + if (client->adapter->algo->reg_hnotify_cli) { + status = client->adapter->algo->reg_hnotify_cli(client); + if (status) + return status; + } + } + driver = to_i2c_driver(dev->driver); client->irq = client->init_irq; @@ -415,8 +423,11 @@ static int i2c_device_probe(struct device *dev) dev_pm_clear_wake_irq(&client->dev); device_init_wakeup(&client->dev, false); put_sync_adapter: - if (client->flags & I2C_CLIENT_HOST_NOTIFY) + if (client->flags & I2C_CLIENT_HOST_NOTIFY) { pm_runtime_put_sync(&client->adapter->dev); + if (client->adapter->algo->unreg_hnotify_cli) + client->adapter->algo->unreg_hnotify_cli(client); + } return status; } @@ -442,8 +453,11 @@ static int i2c_device_remove(struct device *dev) device_init_wakeup(&client->dev, false); client->irq = 0; - if (client->flags & I2C_CLIENT_HOST_NOTIFY) + if (client->flags & I2C_CLIENT_HOST_NOTIFY) { pm_runtime_put(&client->adapter->dev); + if (client->adapter->algo->unreg_hnotify_cli) + client->adapter->algo->unreg_hnotify_cli(client); + } return status; } diff --git a/include/linux/i2c.h b/include/linux/i2c.h index b8b8963f8bb9..35ad108adc68 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -507,6 +507,10 @@ 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_hnotify_cli: Callback informing that a new client with HOST_NOTIFY flag + * is being registered + * @unreg_hnotify_cli: Callback informing that a client with HOST_NOTIFY flag + * 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 * @@ -543,6 +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 HOST_NOTIFY client */ + int (*reg_hnotify_cli)(struct i2c_client *client); + void (*unreg_hnotify_cli)(struct i2c_client *client); + #if IS_ENABLED(CONFIG_I2C_SLAVE) int (*reg_slave)(struct i2c_client *client); int (*unreg_slave)(struct i2c_client *client); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel