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Fri, 28 Jan 2022 03:44:58 -0800 From: Akhil R To: , , , , , , , , , , , , , , , CC: Subject: [PATCH v5 1/3] device property: Add fwnode_irq_get_byname Date: Fri, 28 Jan 2022 17:14:25 +0530 Message-ID: <1643370267-31804-2-git-send-email-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1643370267-31804-1-git-send-email-akhilrajeev@nvidia.com> References: <1643370267-31804-1-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: 0ef56112-9f6a-471b-797a-08d9e2539ff3 X-MS-TrafficTypeDiagnostic: DM6PR12MB5551:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4502; 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:12.22.5.235; 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In the ACPI case, this allow us 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 Reviewed-by: Andy Shevchenko Acked-by: Rafael J. Wysocki --- drivers/base/property.c | 29 +++++++++++++++++++++++++++++ include/linux/property.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/base/property.c b/drivers/base/property.c index e6497f6..fc59e0f 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -936,6 +936,35 @@ 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, or 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); + +/** * 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..95d56a5 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -121,6 +121,7 @@ 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); void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index); From patchwork Fri Jan 28 11:44:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akhil R X-Patchwork-Id: 538607 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 51B25C433EF for ; Fri, 28 Jan 2022 11:45:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348193AbiA1Lpi (ORCPT ); Fri, 28 Jan 2022 06:45:38 -0500 Received: from mail-bn8nam11on2067.outbound.protection.outlook.com ([40.107.236.67]:41121 "EHLO NAM11-BN8-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1348197AbiA1Lpi (ORCPT ); Fri, 28 Jan 2022 06:45:38 -0500 ARC-Seal: i=1; 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Fri, 28 Jan 2022 11:45:13 +0000 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail201.nvidia.com (10.126.190.180) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.9; Fri, 28 Jan 2022 03:45:13 -0800 Received: from kyarlagadda-linux.nvidia.com (10.127.8.10) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server id 15.2.986.9 via Frontend Transport; Fri, 28 Jan 2022 03:45:08 -0800 From: Akhil R To: , , , , , , , , , , , , , , , CC: Subject: [PATCH v5 2/3] docs: firmware-guide: ACPI: Add named interrupt doc Date: Fri, 28 Jan 2022 17:14:26 +0530 Message-ID: <1643370267-31804-3-git-send-email-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1643370267-31804-1-git-send-email-akhilrajeev@nvidia.com> References: <1643370267-31804-1-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: 34509184-385b-4808-9f93-08d9e253b2b9 X-MS-TrafficTypeDiagnostic: SN6PR12MB4767:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7219; 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Signed-off-by: Akhil R Reviewed-by: Andy Shevchenko Acked-by: Rafael J. Wysocki --- Documentation/firmware-guide/acpi/enumeration.rst | 39 +++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/Documentation/firmware-guide/acpi/enumeration.rst b/Documentation/firmware-guide/acpi/enumeration.rst index 74b830b2..d002256 100644 --- a/Documentation/firmware-guide/acpi/enumeration.rst +++ b/Documentation/firmware-guide/acpi/enumeration.rst @@ -143,6 +143,45 @@ 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. Note that only the Interrupt() resource +is mapped and not GpioInt() or similar. + +The driver can call the function - fwnode_irq_get_byname() with the fwnode +and interrupt name as arguments to get the corresponding IRQ number. + SPI serial bus support ====================== From patchwork Fri Jan 28 11:44:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akhil R X-Patchwork-Id: 537805 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 601FBC4332F for ; Fri, 28 Jan 2022 11:45:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244361AbiA1Lpc (ORCPT ); Fri, 28 Jan 2022 06:45:32 -0500 Received: from mail-dm6nam10on2085.outbound.protection.outlook.com ([40.107.93.85]:64129 "EHLO NAM10-DM6-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1348163AbiA1Lpb (ORCPT ); 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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 Reviewed-by: Andy Shevchenko --- drivers/i2c/i2c-core-base.c | 2 +- drivers/i2c/i2c-core-smbus.c | 11 ++++++----- drivers/i2c/i2c-smbus.c | 5 +++-- include/linux/i2c-smbus.h | 6 +++--- 4 files changed, 13 insertions(+), 11 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..304c2c8 100644 --- a/drivers/i2c/i2c-core-smbus.c +++ b/drivers/i2c/i2c-core-smbus.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include "i2c-core.h" @@ -701,13 +702,13 @@ 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 +716,5 @@ 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..7753329 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -13,7 +13,7 @@ #include #include #include -#include +#include #include #include @@ -128,7 +128,8 @@ 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 = fwnode_irq_get_byname(dev_fwnode(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; }