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Thu, 20 Jan 2022 05:44:51 -0800 From: Akhil R To: , , , , , , , , , , , , , , , CC: Subject: [PATCH v3 1/3] device property: Add device_irq_get_byname Date: Thu, 20 Jan 2022 19:14:13 +0530 Message-ID: <1642686255-25951-2-git-send-email-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1642686255-25951-1-git-send-email-akhilrajeev@nvidia.com> References: <1642686255-25951-1-git-send-email-akhilrajeev@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: ca838049-da7b-48f8-38a8-08d9dc1b0e22 X-MS-TrafficTypeDiagnostic: BN7PR12MB2627:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4125; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:12.22.5.234; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:mail.nvidia.com; PTR:InfoNoRecords; CAT:NONE; SFS:(4636009)(36840700001)(46966006)(40470700002)(8936002)(186003)(82310400004)(36860700001)(8676002)(316002)(336012)(47076005)(70586007)(110136005)(4326008)(921005)(26005)(6666004)(86362001)(36756003)(5660300002)(508600001)(7416002)(81166007)(356005)(7696005)(107886003)(426003)(40460700001)(2616005)(70206006)(2906002)(83996005)(36900700001)(2101003); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jan 2022 13:45:00.7737 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ca838049-da7b-48f8-38a8-08d9dc1b0e22 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[12.22.5.234]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT067.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7PR12MB2627 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Add device_irq_get_byname() to get an interrupt by name from both the ACPI table and the Device Tree. This will allow to use 'interrupt-names' in _DSD which can be mapped to Interrupt() resource by index. The implementation is similar to 'interrupt-names' in the Device Tree. Signed-off-by: Akhil R --- drivers/base/property.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/property.h | 3 +++ 2 files changed, 54 insertions(+) diff --git a/drivers/base/property.c b/drivers/base/property.c index e6497f6..962a645 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -936,6 +936,57 @@ void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index) EXPORT_SYMBOL(fwnode_iomap); /** + * fwnode_irq_get_byname - Get IRQ from a fwnode using its name + * @fwnode: Pointer to the firmware node + * @name: IRQ name + * + * Description: + * Find a match to the string 'name' in the 'interrupt-names' string array + * in _DSD for ACPI, or of_node for device tree. Then get the Linux IRQ + * number of the IRQ resource corresponding to the index of the matched + * string. + * + * Return: + * Linux IRQ number on success + * Negative errno otherwise. + */ +int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name) +{ + int index; + + if (!name) + return -EINVAL; + + index = fwnode_property_match_string(fwnode, "interrupt-names", name); + if (index < 0) + return index; + + return fwnode_irq_get(fwnode, index); +} +EXPORT_SYMBOL(fwnode_irq_get_byname); + +/** + * device_irq_get_byname - Get IRQ of a device using interrupt name + * @dev: Device to get the interrupt + * @name: IRQ name + * + * Description: + * Find a match to the string 'name' in the 'interrupt-names' string array + * in _DSD for ACPI, or of_node for device tree. Then get the Linux IRQ + * number of the IRQ resource corresponding to the index of the matched + * string. + * + * Return: + * Linux IRQ number on success + * Negative errno otherwise. + */ +int device_irq_get_byname(struct device *dev, const char *name) +{ + return fwnode_irq_get_byname(dev_fwnode(dev), name); +} +EXPORT_SYMBOL_GPL(device_irq_get_byname); + +/** * fwnode_graph_get_next_endpoint - Get next endpoint firmware node * @fwnode: Pointer to the parent firmware node * @prev: Previous endpoint node or %NULL to get the first diff --git a/include/linux/property.h b/include/linux/property.h index 7399a0b..3123b75 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -121,6 +121,9 @@ struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); void fwnode_handle_put(struct fwnode_handle *fwnode); int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index); +int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name); + +int device_irq_get_byname(struct device *dev, const char *name); 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Signed-off-by: Akhil R --- Documentation/firmware-guide/acpi/enumeration.rst | 38 +++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/Documentation/firmware-guide/acpi/enumeration.rst b/Documentation/firmware-guide/acpi/enumeration.rst index 74b830b2..595deba 100644 --- a/Documentation/firmware-guide/acpi/enumeration.rst +++ b/Documentation/firmware-guide/acpi/enumeration.rst @@ -143,6 +143,44 @@ In robust cases the client unfortunately needs to call acpi_dma_request_slave_chan_by_index() directly and therefore choose the specific FixedDMA resource by its index. +Named Interrupts +================ + +Drivers enumerated via ACPI can have names to interrupts in the ACPI table +which can be used to get the IRQ number in the driver. + +The interrupt name can be listed in _DSD as 'interrupt-names'. The names +should be listed as an array of strings which will map to the Interrupt() +resource in the ACPI table corresponding to its index. + +The table below shows an example of its usage:: + + Device (DEV0) { + ... + Name (_CRS, ResourceTemplate() { + ... + Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive) { + 0x20, + 0x24 + } + }) + + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"interrupt-names", + Package (2) {"default", "alert"}}, + } + ... + }) + } + +The interrupt name 'default' will correspond to 0x20 in Interrupt() +resource and 'alert' to 0x24. + +The driver can call the function - device_irq_get_byname() with the device +and interrupt name as arguments to get the corresponding IRQ number. + SPI serial bus support ====================== From patchwork Thu Jan 20 13:44:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akhil R X-Patchwork-Id: 534165 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1AC55C433F5 for ; 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Thu, 20 Jan 2022 13:45:25 +0000 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Thu, 20 Jan 2022 13:45:25 +0000 Received: from kyarlagadda-linux.nvidia.com (10.127.8.10) by mail.nvidia.com (172.20.187.15) with Microsoft SMTP Server id 15.0.1497.18 via Frontend Transport; Thu, 20 Jan 2022 05:45:17 -0800 From: Akhil R To: , , , , , , , , , , , , , , , CC: Subject: [PATCH v3 3/3] i2c: smbus: Use device_*() functions instead of of_*() Date: Thu, 20 Jan 2022 19:14:15 +0530 Message-ID: <1642686255-25951-4-git-send-email-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1642686255-25951-1-git-send-email-akhilrajeev@nvidia.com> References: <1642686255-25951-1-git-send-email-akhilrajeev@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 12c72dca-212f-4fb4-26ce-08d9dc1b1eae X-MS-TrafficTypeDiagnostic: BYAPR12MB2997:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6430; 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This allows to have the smbus_alert interrupt without any changes in the controller drivers using the ACPI table. Signed-off-by: Akhil R --- drivers/i2c/i2c-core-base.c | 2 +- drivers/i2c/i2c-core-smbus.c | 10 +++++----- drivers/i2c/i2c-smbus.c | 2 +- include/linux/i2c-smbus.h | 6 +++--- 4 files changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 2c59dd7..32a4526 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -1479,7 +1479,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap) goto out_list; } - res = of_i2c_setup_smbus_alert(adap); + res = i2c_setup_smbus_alert(adap); if (res) goto out_reg; diff --git a/drivers/i2c/i2c-core-smbus.c b/drivers/i2c/i2c-core-smbus.c index e5b2d14..4c24c84 100644 --- a/drivers/i2c/i2c-core-smbus.c +++ b/drivers/i2c/i2c-core-smbus.c @@ -701,13 +701,13 @@ struct i2c_client *i2c_new_smbus_alert_device(struct i2c_adapter *adapter, } EXPORT_SYMBOL_GPL(i2c_new_smbus_alert_device); -#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF) -int of_i2c_setup_smbus_alert(struct i2c_adapter *adapter) +#if IS_ENABLED(CONFIG_I2C_SMBUS) +int i2c_setup_smbus_alert(struct i2c_adapter *adapter) { int irq; - irq = of_property_match_string(adapter->dev.of_node, "interrupt-names", - "smbus_alert"); + irq = device_property_match_string(adapter->dev.parent, "interrupt-names", + "smbus_alert"); if (irq == -EINVAL || irq == -ENODATA) return 0; else if (irq < 0) @@ -715,5 +715,5 @@ int of_i2c_setup_smbus_alert(struct i2c_adapter *adapter) return PTR_ERR_OR_ZERO(i2c_new_smbus_alert_device(adapter, NULL)); } -EXPORT_SYMBOL_GPL(of_i2c_setup_smbus_alert); +EXPORT_SYMBOL_GPL(i2c_setup_smbus_alert); #endif diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index d3d06e3..fdd6d97 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -128,7 +128,7 @@ static int smbalert_probe(struct i2c_client *ara, if (setup) { irq = setup->irq; } else { - irq = of_irq_get_byname(adapter->dev.of_node, "smbus_alert"); + irq = device_irq_get_byname(adapter->dev.parent, "smbus_alert"); if (irq <= 0) return irq; } diff --git a/include/linux/i2c-smbus.h b/include/linux/i2c-smbus.h index 1ef4218..95cf902 100644 --- a/include/linux/i2c-smbus.h +++ b/include/linux/i2c-smbus.h @@ -30,10 +30,10 @@ struct i2c_client *i2c_new_smbus_alert_device(struct i2c_adapter *adapter, struct i2c_smbus_alert_setup *setup); int i2c_handle_smbus_alert(struct i2c_client *ara); -#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF) -int of_i2c_setup_smbus_alert(struct i2c_adapter *adap); +#if IS_ENABLED(CONFIG_I2C_SMBUS) +int i2c_setup_smbus_alert(struct i2c_adapter *adap); #else -static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap) +static inline int i2c_setup_smbus_alert(struct i2c_adapter *adap) { return 0; }