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([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 29 Oct 2020 03:59:47 -0700 From: Heikki Krogerus To: "Rafael J. Wysocki" Cc: Felipe Balbi , Andy Shevchenko , Sakari Ailus , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCHv2 2/3] software node: Introduce device_add_software_node() Date: Thu, 29 Oct 2020 13:59:40 +0300 Message-Id: <20201029105941.63410-3-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201029105941.63410-1-heikki.krogerus@linux.intel.com> References: <20201029105941.63410-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org This helper will register a software node and then assign it to device at the same time. The function will also make sure that the device can't have more than one software node. Signed-off-by: Heikki Krogerus --- drivers/base/swnode.c | 45 ++++++++++++++++++++++++++++++++++++++++ include/linux/property.h | 3 +++ 2 files changed, 48 insertions(+) diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index 595a9c240fede..0001fbea19cff 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -1525,6 +1525,51 @@ void fwnode_remove_software_node(struct fwnode_handle *fwnode) } EXPORT_SYMBOL_GPL(fwnode_remove_software_node); +/** + * device_add_software_node - Assign software node to a device + * @dev: The device the software node is meant for. + * @swnode: The software node. + * + * This function will register @swnode and make it the secondary firmware node + * pointer of @dev. If @dev has no primary node, then @swnode will become the primary + * node. + */ +int device_add_software_node(struct device *dev, const struct software_node *swnode) +{ + int ret; + + /* Only one software node per device. */ + if (dev_to_swnode(dev)) + return -EBUSY; + + ret = software_node_register(swnode); + if (ret) + return ret; + + set_secondary_fwnode(dev, software_node_fwnode(swnode)); + + return 0; +} +EXPORT_SYMBOL_GPL(device_add_software_node); + +/** + * device_remove_software_node - Remove device's software node + * @dev: The device with the software node. + * + * This function will unregister the software node of @dev. + */ +void device_remove_software_node(struct device *dev) +{ + struct swnode *swnode; + + swnode = dev_to_swnode(dev); + if (!swnode) + return; + + kobject_put(&swnode->kobj); +} +EXPORT_SYMBOL_GPL(device_remove_software_node); + int software_node_notify(struct device *dev, unsigned long action) { struct swnode *swnode; diff --git a/include/linux/property.h b/include/linux/property.h index 33b25c8bd4052..993638e0a0b6e 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -495,4 +495,7 @@ fwnode_create_software_node(const struct property_entry *properties, const struct fwnode_handle *parent); void fwnode_remove_software_node(struct fwnode_handle *fwnode); +int device_add_software_node(struct device *dev, const struct software_node *swnode); +void device_remove_software_node(struct device *dev); + #endif /* _LINUX_PROPERTY_H_ */