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b=AydPYmx4A5X2ZDRYJOXxrbgU2qv1jz04139w3vwKQm0oJY05ggkIVE68xmN0yxqOag/PwiGk8i4RT3bjnQrcjbu2v5uwl5eqUVxJ9zYuy1fELDLvlNRLWWo7quZgT0fxY8Tdiejsfs4v5U6HyGrwwhV/nUv7rPI/ulzmmueyEcQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AS8PR04MB7511.eurprd04.prod.outlook.com (2603:10a6:20b:23f::5) by DB9PR04MB9332.eurprd04.prod.outlook.com (2603:10a6:10:36c::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7181.17; Wed, 10 Jan 2024 17:53:05 +0000 Received: from AS8PR04MB7511.eurprd04.prod.outlook.com ([fe80::8ee3:bac5:a2da:d469]) by AS8PR04MB7511.eurprd04.prod.outlook.com ([fe80::8ee3:bac5:a2da:d469%4]) with mapi id 15.20.7159.020; Wed, 10 Jan 2024 17:53:04 +0000 From: Frank Li To: frank.li@nxp.com, robh@kernel.org Cc: alexandre.belloni@bootlin.com, conor.culhane@silvaco.com, gregkh@linuxfoundation.org, imx@lists.linux.dev, jirislaby@kernel.org, joe@perches.com, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, miquel.raynal@bootlin.com, zbigniew.lukwinski@linux.intel.com, devicetree@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org, krzysztof.kozlowski@linaro.org Subject: [PATCH v2 6/7] i3c: add API i3c_dev_gettstatus_format1() to get target device status Date: Wed, 10 Jan 2024 12:52:20 -0500 Message-Id: <20240110175221.2335480-7-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240110175221.2335480-1-Frank.Li@nxp.com> References: <20240110175221.2335480-1-Frank.Li@nxp.com> X-ClientProxiedBy: SJ0PR05CA0145.namprd05.prod.outlook.com (2603:10b6:a03:33d::30) To AS8PR04MB7511.eurprd04.prod.outlook.com (2603:10a6:20b:23f::5) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR04MB7511:EE_|DB9PR04MB9332:EE_ X-MS-Office365-Filtering-Correlation-Id: 1e8e635c-ab26-40a6-3c1c-08dc1204feec X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Add API to fetch it with format1. Signed-off-by: Frank Li --- drivers/i3c/device.c | 24 ++++++++++++++++++++++++ drivers/i3c/internals.h | 1 + drivers/i3c/master.c | 26 ++++++++++++++++++++++++++ include/linux/i3c/device.h | 1 + 4 files changed, 52 insertions(+) diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c index 1a6a8703dbc3a..aa26cf50ab9c6 100644 --- a/drivers/i3c/device.c +++ b/drivers/i3c/device.c @@ -196,6 +196,30 @@ void i3c_device_free_ibi(struct i3c_device *dev) } EXPORT_SYMBOL_GPL(i3c_device_free_ibi); +/** + * i3c_device_getstatus_format1() - Get device status with format 1. + * @dev: device for which you want to get status. + * @status: I3C status format 1 + * + * Return: 0 in case of success, a negative error core otherwise. + */ +int i3c_device_getstatus_format1(struct i3c_device *dev, u16 *status) +{ + int ret = -EINVAL; + + if (!status) + return -EINVAL; + + i3c_bus_normaluse_lock(dev->bus); + if (dev->desc) + ret = i3c_dev_getstatus_format1_locked(dev->desc, status); + + i3c_bus_normaluse_unlock(dev->bus); + + return ret; +} +EXPORT_SYMBOL_GPL(i3c_device_getstatus_format1); + /** * i3cdev_to_dev() - Returns the device embedded in @i3cdev * @i3cdev: I3C device diff --git a/drivers/i3c/internals.h b/drivers/i3c/internals.h index 908a807badaf9..976ad26ca79c2 100644 --- a/drivers/i3c/internals.h +++ b/drivers/i3c/internals.h @@ -24,4 +24,5 @@ int i3c_dev_enable_ibi_locked(struct i3c_dev_desc *dev); int i3c_dev_request_ibi_locked(struct i3c_dev_desc *dev, const struct i3c_ibi_setup *req); void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev); +int i3c_dev_getstatus_format1_locked(struct i3c_dev_desc *dev, u16 *status); #endif /* I3C_INTERNAL_H */ diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index d3b56c9f601e2..81611a3e3585a 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2923,6 +2923,32 @@ void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev) dev->ibi = NULL; } +int i3c_dev_getstatus_format1_locked(struct i3c_dev_desc *dev, u16 *status) +{ + struct i3c_master_controller *master = i3c_dev_get_master(dev); + struct i3c_ccc_getstatus *format1; + struct i3c_ccc_cmd_dest dest; + struct i3c_ccc_cmd cmd; + int ret; + + format1 = i3c_ccc_cmd_dest_init(&dest, dev->info.dyn_addr, sizeof(*format1)); + if (!format1) + return -ENOMEM; + + i3c_ccc_cmd_init(&cmd, true, I3C_CCC_GETSTATUS, &dest, 1); + + ret = i3c_master_send_ccc_cmd_locked(master, &cmd); + if (ret) + goto out; + + *status = be16_to_cpu(format1->status); + +out: + i3c_ccc_cmd_dest_cleanup(&dest); + + return ret; +} + static int __init i3c_init(void) { int res; diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h index ef6217da8253b..5f511bd400f11 100644 --- a/include/linux/i3c/device.h +++ b/include/linux/i3c/device.h @@ -345,4 +345,5 @@ void i3c_device_free_ibi(struct i3c_device *dev); int i3c_device_enable_ibi(struct i3c_device *dev); int i3c_device_disable_ibi(struct i3c_device *dev); +int i3c_device_getstatus_format1(struct i3c_device *dev, u16 *status); #endif /* I3C_DEV_H */