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greybus: firmware: prefix char-device with 'gb-' 

This will make it consistent with any other character devices we have
for greybus and let us identify greybus character devices easily.

Compiled tested only.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Viresh Kumar 2016-06-15 15:58:22 +05:30 committed by Greg Kroah-Hartman
parent 93dbb97a3e
commit 4ee48a5ecb
3 changed files with 11 additions and 11 deletions
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18
drivers/staging/greybus/Documentation/firmware/firmware-management
View File

@ -49,14 +49,14 @@ Sysfs Interfaces - Firmware Management
The Firmware Management Protocol interacts with Userspace using the character
device interface. The character device will be present in /dev/ directory
and will be named fw-mgmt-<N>. The number <N> is assigned at runtime.
and will be named gb-fw-mgmt-<N>. The number <N> is assigned at runtime.
Identifying the Character Device
================================
There can be multiple devices present in /dev/ directory with name fw-mgmt-N and
user first needs to identify the character device used for firmware-management
for a particular interface.
There can be multiple devices present in /dev/ directory with name gb-fw-mgmt-N
and user first needs to identify the character device used for
firmware-management for a particular interface.
The Firmware Management core creates a device of class 'gb_fw_mgmt', which shall
be used by the user to identify the right character device for it. The class
@ -64,17 +64,17 @@ device is created within the Bundle directory for a particular Interface.
For example this is how the class-device can be present:
/sys/bus/greybus/devices/1-1/1-1.1/1-1.1.1/gb_fw_mgmt/fw-mgmt-0
/sys/bus/greybus/devices/1-1/1-1.1/1-1.1.1/gb_fw_mgmt/gb-fw-mgmt-0
The last name in this path: fw-mgmt-0 is precisely the name of the char device
and so the device in this case will be:
The last name in this path: gb-fw-mgmt-0 is precisely the name of the char
device and so the device in this case will be:
/dev/fw-mgmt-0.
/dev/gb-fw-mgmt-0.
Operations on the Char device
=============================
The Character device (fw-mgmt-0 in example) can be opened by the userspace
The Character device (gb-fw-mgmt-0 in example) can be opened by the userspace
application and it can perform various 'ioctl' operations on the device. The
device doesn't support any read/write operations.

2
drivers/staging/greybus/Documentation/firmware/firmware.c
View File

@ -74,7 +74,7 @@ int main(int argc, char *argv[])
/* Make sure arguments are correct */
if (argc != 2) {
printf("\nUsage: ./firmware <Path of the fw-mgmt-X dev>\n");
printf("\nUsage: ./firmware <Path of the gb-fw-mgmt-X dev>\n");
return 0;
}

2
drivers/staging/greybus/fw-management.c
View File

@ -599,7 +599,7 @@ int gb_fw_mgmt_connection_init(struct gb_connection *connection)
/* Add a soft link to the previously added char-dev within the bundle */
fw_mgmt->class_device = device_create(fw_mgmt_class, fw_mgmt->parent,
fw_mgmt->dev_num, NULL,
"fw-mgmt-%d", minor);
"gb-fw-mgmt-%d", minor);
if (IS_ERR(fw_mgmt->class_device)) {
ret = PTR_ERR(fw_mgmt->class_device);
goto err_del_cdev;