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Mon, 20 Jul 2026 21:08:58 -0700 From: Akhil R To: Alexandre Belloni CC: Frank Li , Miquel Raynal , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Guenter Roeck , Philipp Zabel , Jon Hunter , Thierry Reding , , , , , , Akhil R Subject: [PATCH v6 02/12] i3c: master: Use unified device property interface Date: Tue, 21 Jul 2026 04:07:50 +0000 Message-ID: <20260721040805.1696503-3-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260721040805.1696503-1-akhilrajeev@nvidia.com> References: <20260721040805.1696503-1-akhilrajeev@nvidia.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00012E7D:EE_|CH2PR12MB4165:EE_ X-MS-Office365-Filtering-Correlation-Id: 0d653b87-c79c-4ce4-809c-08dee6ddd71b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|23010399003|36860700016|82310400026|376014|7416014|56012099006|11063799006|10067099003|22082099003|18002099003|6133799003; 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Reviewed-by: Frank Li Signed-off-by: Akhil R --- drivers/i3c/master.c | 77 +++++++++++++++++++++----------------- include/linux/i3c/master.h | 5 ++- 2 files changed, 46 insertions(+), 36 deletions(-) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index f1be38a640ca..4b3d9628bc39 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -13,10 +13,12 @@ #include #include #include +#include #include #include #include #include +#include #include #include #include @@ -491,7 +493,7 @@ static void i3c_bus_cleanup(struct i3c_bus *i3cbus) mutex_unlock(&i3c_core_lock); } -static int i3c_bus_init(struct i3c_bus *i3cbus, struct device_node *np) +static int i3c_bus_init(struct i3c_bus *i3cbus, struct fwnode_handle *fwnode) { int ret, start, end, id = -1; @@ -501,8 +503,8 @@ static int i3c_bus_init(struct i3c_bus *i3cbus, struct device_node *np) i3c_bus_init_addrslots(i3cbus); i3cbus->mode = I3C_BUS_MODE_PURE; - if (np) - id = of_alias_get_id(np, "i3c"); + if (fwnode && is_of_node(fwnode)) + id = of_alias_get_id(to_of_node(fwnode), "i3c"); mutex_lock(&i3c_core_lock); if (id >= 0) { @@ -837,7 +839,7 @@ static void i3c_masterdev_release(struct device *dev) WARN_ON(!list_empty(&bus->devs.i2c) || !list_empty(&bus->devs.i3c)); i3c_bus_cleanup(bus); - of_node_put(dev->of_node); + fwnode_handle_put(dev->fwnode); } static const struct device_type i3c_masterdev_type = { @@ -1044,7 +1046,7 @@ static void i3c_device_release(struct device *dev) WARN_ON(i3cdev->desc); - of_node_put(i3cdev->dev.of_node); + fwnode_handle_put(dev->fwnode); kfree(i3cdev); } @@ -1928,7 +1930,7 @@ i3c_master_register_new_i3c_devs(struct i3c_master_controller *master) desc->info.pid); if (desc->boardinfo) - desc->dev->dev.of_node = desc->boardinfo->of_node; + device_set_node(&desc->dev->dev, desc->boardinfo->fwnode); ret = device_register(&desc->dev->dev); if (ret) { @@ -2620,8 +2622,8 @@ EXPORT_SYMBOL_GPL(i3c_master_do_daa); #define OF_I3C_REG1_IS_I2C_DEV BIT(31) static int -of_i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master, - struct device_node *node, u32 *reg) +i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master, + struct fwnode_handle *fwnode, u32 *reg) { struct i2c_dev_boardinfo *boardinfo; struct device *dev = &master->dev; @@ -2631,9 +2633,13 @@ of_i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master, if (!boardinfo) return -ENOMEM; - ret = of_i2c_get_board_info(dev, node, &boardinfo->base); - if (ret) - return ret; + if (is_of_node(fwnode)) { + ret = of_i2c_get_board_info(dev, to_of_node(fwnode), &boardinfo->base); + if (ret) + return ret; + } else { + return -EINVAL; + } /* * The I3C Specification does not clearly say I2C devices with 10-bit @@ -2649,14 +2655,14 @@ of_i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master, boardinfo->lvr = reg[2]; list_add_tail(&boardinfo->node, &master->boardinfo.i2c); - of_node_get(node); + fwnode_handle_get(fwnode); return 0; } static int -of_i3c_master_add_i3c_boardinfo(struct i3c_master_controller *master, - struct device_node *node, u32 *reg) +i3c_master_add_i3c_boardinfo(struct i3c_master_controller *master, + struct fwnode_handle *fwnode, u32 *reg) { struct i3c_dev_boardinfo *boardinfo; struct device *dev = &master->dev; @@ -2679,7 +2685,7 @@ of_i3c_master_add_i3c_boardinfo(struct i3c_master_controller *master, boardinfo->static_addr = reg[0]; - if (!of_property_read_u32(node, "assigned-address", &init_dyn_addr)) { + if (!fwnode_property_read_u32(fwnode, "assigned-address", &init_dyn_addr)) { if (init_dyn_addr > I3C_MAX_ADDR) return -EINVAL; @@ -2696,14 +2702,14 @@ of_i3c_master_add_i3c_boardinfo(struct i3c_master_controller *master, return -EINVAL; boardinfo->init_dyn_addr = init_dyn_addr; - boardinfo->of_node = of_node_get(node); + boardinfo->fwnode = fwnode_handle_get(fwnode); list_add_tail(&boardinfo->node, &master->boardinfo.i3c); return 0; } -static int of_i3c_master_add_dev(struct i3c_master_controller *master, - struct device_node *node) +static int i3c_master_add_dev(struct i3c_master_controller *master, + struct fwnode_handle *fwnode) { u32 reg[3]; int ret; @@ -2711,7 +2717,7 @@ static int of_i3c_master_add_dev(struct i3c_master_controller *master, if (!master) return -EINVAL; - ret = of_property_read_u32_array(node, "reg", reg, ARRAY_SIZE(reg)); + ret = fwnode_property_read_u32_array(fwnode, "reg", reg, ARRAY_SIZE(reg)); if (ret) return ret; @@ -2720,25 +2726,25 @@ static int of_i3c_master_add_dev(struct i3c_master_controller *master, * dealing with an I2C device. */ if (!reg[1]) - ret = of_i3c_master_add_i2c_boardinfo(master, node, reg); + ret = i3c_master_add_i2c_boardinfo(master, fwnode, reg); else - ret = of_i3c_master_add_i3c_boardinfo(master, node, reg); + ret = i3c_master_add_i3c_boardinfo(master, fwnode, reg); return ret; } -static int of_populate_i3c_bus(struct i3c_master_controller *master) +static int fwnode_populate_i3c_bus(struct i3c_master_controller *master) { struct device *dev = &master->dev; - struct device_node *i3cbus_np = dev->of_node; + struct fwnode_handle *fwnode = dev_fwnode(dev); int ret; u32 val; - if (!i3cbus_np) + if (!fwnode) return 0; - for_each_available_child_of_node_scoped(i3cbus_np, node) { - ret = of_i3c_master_add_dev(master, node); + fwnode_for_each_available_child_node_scoped(fwnode, child) { + ret = i3c_master_add_dev(master, child); if (ret) return ret; } @@ -2748,10 +2754,10 @@ static int of_populate_i3c_bus(struct i3c_master_controller *master) * on the bus are not supporting typical rates, or if the bus topology * prevents it from using max possible rate. */ - if (!of_property_read_u32(i3cbus_np, "i2c-scl-hz", &val)) + if (!device_property_read_u32(dev, "i2c-scl-hz", &val)) master->bus.scl_rate.i2c = val; - if (!of_property_read_u32(i3cbus_np, "i3c-scl-hz", &val)) + if (!device_property_read_u32(dev, "i3c-scl-hz", &val)) master->bus.scl_rate.i3c = val; return 0; @@ -2806,7 +2812,7 @@ static u8 i3c_master_i2c_get_lvr(struct i2c_client *client) u8 lvr = I3C_LVR_I2C_INDEX(2) | I3C_LVR_I2C_FM_MODE; u32 reg[3]; - if (!of_property_read_u32_array(client->dev.of_node, "reg", reg, ARRAY_SIZE(reg))) + if (!fwnode_property_read_u32_array(client->dev.fwnode, "reg", reg, ARRAY_SIZE(reg))) lvr = reg[2]; return lvr; @@ -2925,7 +2931,8 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master) struct i2c_adapter *adap = i3c_master_to_i2c_adapter(master); struct i2c_dev_desc *i2cdev; struct i2c_dev_boardinfo *i2cboardinfo; - int ret, id; + struct fwnode_handle *fwnode = dev_fwnode(&master->dev); + int ret, id = -1; adap->dev.parent = master->dev.parent; adap->owner = master->dev.parent->driver->owner; @@ -2934,7 +2941,9 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master) adap->timeout = HZ; adap->retries = 3; - id = of_alias_get_id(master->dev.of_node, "i2c"); + if (fwnode && is_of_node(fwnode)) + id = of_alias_get_id(to_of_node(fwnode), "i2c"); + if (id >= 0) { adap->nr = id; ret = i2c_add_numbered_adapter(adap); @@ -3235,7 +3244,7 @@ int i3c_master_register(struct i3c_master_controller *master, return ret; master->dev.parent = parent; - master->dev.of_node = of_node_get(parent->of_node); + device_set_node(&master->dev, fwnode_handle_get(dev_fwnode(parent))); master->dev.bus = &i3c_bus_type; master->dev.type = &i3c_masterdev_type; master->dev.release = i3c_masterdev_release; @@ -3254,13 +3263,13 @@ int i3c_master_register(struct i3c_master_controller *master, master->dev.coherent_dma_mask = parent->coherent_dma_mask; master->dev.dma_parms = parent->dma_parms; - ret = i3c_bus_init(i3cbus, master->dev.of_node); + ret = i3c_bus_init(i3cbus, dev_fwnode(&master->dev)); if (ret) goto err_put_dev; dev_set_name(&master->dev, "i3c-%d", i3cbus->id); - ret = of_populate_i3c_bus(master); + ret = fwnode_populate_i3c_bus(master); if (ret) goto err_put_dev; diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 4d2a68793324..a16deb04b2e1 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -177,7 +177,8 @@ struct i3c_device_ibi_info { * @pid: I3C Provisioned ID exposed by the device. This is a unique identifier * that may be used to attach boardinfo to i3c_dev_desc when the device * does not have a static address - * @of_node: optional DT node in case the device has been described in the DT + * @fwnode: Firmware node (DT or ACPI) in case the device has been + * described in firmware * * This structure is used to attach board-level information to an I3C device. * Not all I3C devices connected on the bus will have a boardinfo. It's only @@ -189,7 +190,7 @@ struct i3c_dev_boardinfo { u8 init_dyn_addr; u8 static_addr; u64 pid; - struct device_node *of_node; + struct fwnode_handle *fwnode; }; /** -- 2.43.0