From 9c829c097f2f1cbebcfff69a7254b1df9852fe4e Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Wed, 28 Dec 2016 14:56:47 -0800 Subject: of: device: Support loading a module with OF based modalias In the case of ULPI devices, we want to be able to load the driver before registering the device so that we don't get stuck in a loop waiting for the phy module to appear and failing usb controller probe. Currently we request the ulpi module via the ulpi ids, but in the DT case we might need to request it with the OF based modalias instead. Add a common function that allows anyone to request a module with the OF based modalias. Acked-by: Rob Herring Cc: Signed-off-by: Stephen Boyd Signed-off-by: Peter Chen --- drivers/of/device.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/of') diff --git a/drivers/of/device.c b/drivers/of/device.c index fd5cfad7c403..8a22a253a830 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -226,6 +226,29 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len) return tsize; } +int of_device_request_module(struct device *dev) +{ + char *str; + ssize_t size; + int ret; + + size = of_device_get_modalias(dev, NULL, 0); + if (size < 0) + return size; + + str = kmalloc(size + 1, GFP_KERNEL); + if (!str) + return -ENOMEM; + + of_device_get_modalias(dev, str, size); + str[size] = '\0'; + ret = request_module(str); + kfree(str); + + return ret; +} +EXPORT_SYMBOL_GPL(of_device_request_module); + /** * of_device_uevent - Display OF related uevent information */ -- cgit v1.2.3 From 7a3b7cd332db08546f3cdd984f11773e0d1999e7 Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Wed, 28 Dec 2016 14:56:48 -0800 Subject: of: device: Export of_device_{get_modalias, uvent_modalias} to modules The ULPI bus can be built as a module, and it will soon be calling these functions when it supports probing devices from DT. Export them so they can be used by the ULPI module. Acked-by: Rob Herring Cc: Signed-off-by: Stephen Boyd Signed-off-by: Peter Chen --- drivers/of/device.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/of') diff --git a/drivers/of/device.c b/drivers/of/device.c index 8a22a253a830..b1e6bebda3f3 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -225,6 +225,7 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len) return tsize; } +EXPORT_SYMBOL_GPL(of_device_get_modalias); int of_device_request_module(struct device *dev) { @@ -310,3 +311,4 @@ int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) return 0; } +EXPORT_SYMBOL_GPL(of_device_uevent_modalias); -- cgit v1.2.3