diff options
| author | Sudeep Holla <sudeep.holla@arm.com> | 2023-10-05 18:56:40 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2023-10-06 15:32:47 +0100 |
| commit | 22779149e93d956e9d266f545b26e548bf5b132d (patch) | |
| tree | 520438453e1085537177b8ff5cc097bcea49e988 | |
| parent | 2d698e8b4fd22374dac0a2d5150ab24d57a222ab (diff) | |
firmware: arm_ffa: Emit modalias for FF-A devices
In order to enable libkmod lookups for FF-A device objects to their
corresponding module, add 'modalias' to the base attribute of FF-A
devices.
Tested-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Link: https://lore.kernel.org/r/20231005175640.379631-1-sudeep.holla@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
| -rw-r--r-- | drivers/firmware/arm_ffa/bus.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/firmware/arm_ffa/bus.c b/drivers/firmware/arm_ffa/bus.c index 7865438b3696..1c7940ba5539 100644 --- a/drivers/firmware/arm_ffa/bus.c +++ b/drivers/firmware/arm_ffa/bus.c @@ -15,6 +15,8 @@ #include "common.h" +#define SCMI_UEVENT_MODALIAS_FMT "arm_ffa:%04x:%pUb" + static DEFINE_IDA(ffa_bus_id); static int ffa_device_match(struct device *dev, struct device_driver *drv) @@ -63,10 +65,20 @@ static int ffa_device_uevent(const struct device *dev, struct kobj_uevent_env *e { const struct ffa_device *ffa_dev = to_ffa_dev(dev); - return add_uevent_var(env, "MODALIAS=arm_ffa:%04x:%pUb", + return add_uevent_var(env, "MODALIAS=" SCMI_UEVENT_MODALIAS_FMT, ffa_dev->vm_id, &ffa_dev->uuid); } +static ssize_t modalias_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ffa_device *ffa_dev = to_ffa_dev(dev); + + return sysfs_emit(buf, SCMI_UEVENT_MODALIAS_FMT, ffa_dev->vm_id, + &ffa_dev->uuid); +} +static DEVICE_ATTR_RO(modalias); + static ssize_t partition_id_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -88,6 +100,7 @@ static DEVICE_ATTR_RO(uuid); static struct attribute *ffa_device_attributes_attrs[] = { &dev_attr_partition_id.attr, &dev_attr_uuid.attr, + &dev_attr_modalias.attr, NULL, }; ATTRIBUTE_GROUPS(ffa_device_attributes); |