diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/832-v6.8-of-device-Export-of_device_make_bus_id.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/832-v6.8-of-device-Export-of_device_make_bus_id.patch | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/832-v6.8-of-device-Export-of_device_make_bus_id.patch b/target/linux/generic/backport-5.15/832-v6.8-of-device-Export-of_device_make_bus_id.patch new file mode 100644 index 0000000000..d097c1b0f4 --- /dev/null +++ b/target/linux/generic/backport-5.15/832-v6.8-of-device-Export-of_device_make_bus_id.patch @@ -0,0 +1,128 @@ +From 7f38b70042fcaa49219045bd1a9a2836e27a58ac Mon Sep 17 00:00:00 2001 +From: Miquel Raynal <miquel.raynal@bootlin.com> +Date: Fri, 15 Dec 2023 11:15:27 +0000 +Subject: [PATCH] of: device: Export of_device_make_bus_id() + +This helper is really handy to create unique device names based on their +device tree path, we may need it outside of the OF core (in the NVMEM +subsystem) so let's export it. As this helper has nothing patform +specific, let's move it to of/device.c instead of of/platform.c so we +can add its prototype to of_device.h. + +Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> +Acked-by: Rob Herring <robh@kernel.org> +Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Link: https://lore.kernel.org/r/20231215111536.316972-2-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/of/device.c | 41 +++++++++++++++++++++++++++++++++++++++ + drivers/of/platform.c | 40 -------------------------------------- + include/linux/of_device.h | 6 ++++++ + 3 files changed, 47 insertions(+), 40 deletions(-) + +--- a/drivers/of/device.c ++++ b/drivers/of/device.c +@@ -337,3 +337,38 @@ int of_device_uevent_modalias(struct dev + return 0; + } + EXPORT_SYMBOL_GPL(of_device_uevent_modalias); ++ ++/** ++ * of_device_make_bus_id - Use the device node data to assign a unique name ++ * @dev: pointer to device structure that is linked to a device tree node ++ * ++ * This routine will first try using the translated bus address to ++ * derive a unique name. If it cannot, then it will prepend names from ++ * parent nodes until a unique name can be derived. ++ */ ++void of_device_make_bus_id(struct device *dev) ++{ ++ struct device_node *node = dev->of_node; ++ const __be32 *reg; ++ u64 addr; ++ ++ /* Construct the name, using parent nodes if necessary to ensure uniqueness */ ++ while (node->parent) { ++ /* ++ * If the address can be translated, then that is as much ++ * uniqueness as we need. Make it the first component and return ++ */ ++ reg = of_get_property(node, "reg", NULL); ++ if (reg && (addr = of_translate_address(node, reg)) != OF_BAD_ADDR) { ++ dev_set_name(dev, dev_name(dev) ? "%llx.%pOFn:%s" : "%llx.%pOFn", ++ addr, node, dev_name(dev)); ++ return; ++ } ++ ++ /* format arguments only used if dev_name() resolves to NULL */ ++ dev_set_name(dev, dev_name(dev) ? "%s:%s" : "%s", ++ kbasename(node->full_name), dev_name(dev)); ++ node = node->parent; ++ } ++} ++EXPORT_SYMBOL_GPL(of_device_make_bus_id); +--- a/drivers/of/platform.c ++++ b/drivers/of/platform.c +@@ -64,40 +64,6 @@ EXPORT_SYMBOL(of_find_device_by_node); + */ + + /** +- * of_device_make_bus_id - Use the device node data to assign a unique name +- * @dev: pointer to device structure that is linked to a device tree node +- * +- * This routine will first try using the translated bus address to +- * derive a unique name. If it cannot, then it will prepend names from +- * parent nodes until a unique name can be derived. +- */ +-static void of_device_make_bus_id(struct device *dev) +-{ +- struct device_node *node = dev->of_node; +- const __be32 *reg; +- u64 addr; +- +- /* Construct the name, using parent nodes if necessary to ensure uniqueness */ +- while (node->parent) { +- /* +- * If the address can be translated, then that is as much +- * uniqueness as we need. Make it the first component and return +- */ +- reg = of_get_property(node, "reg", NULL); +- if (reg && (addr = of_translate_address(node, reg)) != OF_BAD_ADDR) { +- dev_set_name(dev, dev_name(dev) ? "%llx.%pOFn:%s" : "%llx.%pOFn", +- addr, node, dev_name(dev)); +- return; +- } +- +- /* format arguments only used if dev_name() resolves to NULL */ +- dev_set_name(dev, dev_name(dev) ? "%s:%s" : "%s", +- kbasename(node->full_name), dev_name(dev)); +- node = node->parent; +- } +-} +- +-/** + * of_device_alloc - Allocate and initialize an of_device + * @np: device node to assign to device + * @bus_id: Name to assign to the device. May be null to use default name. +--- a/include/linux/of_device.h ++++ b/include/linux/of_device.h +@@ -56,6 +56,9 @@ static inline int of_dma_configure(struc + { + return of_dma_configure_id(dev, np, force_dma, NULL); + } ++ ++void of_device_make_bus_id(struct device *dev); ++ + #else /* CONFIG_OF */ + + static inline int of_driver_match_device(struct device *dev, +@@ -113,6 +116,9 @@ static inline int of_dma_configure(struc + { + return 0; + } ++ ++static inline void of_device_make_bus_id(struct device *dev) {} ++ + #endif /* CONFIG_OF */ + + #endif /* _LINUX_OF_DEVICE_H */ |