How to figure out which driver should I use with my usb wifi adapter

[hzh]

Recently I decided to use a usb wifi adapter to add another radio device to my router. And the one I have is a Ralink RT5370. So the first thing I need to do is to figure out how to install the driver for the new hardware. After a quick google, I found out that

opkg update  
opkg install kmod-rt2800-lib kmod-rt2800-usb kmod-rt2x00-lib kmod-rt2x00-usb 

are the commands that I should probably go for. Though the same commands are popping up everywhere on the internet, all of them are from someone's blog post or forum post. So I felt like it's pretty random, and wondered if there are any systematical way to tell me which driver I should install. I tried to search on the both the ralink and openwrt website, but got no luck.

So are there really some "conventional way" to decide which driver I should use for a new hardware? (aka what keyword should I add to after opkg install ?) I really feel like trying to get this kind of information from someone's blog post seems weird, how did they get the information at the first place?

[Mijzelf]

You can plug that stick in a Linux desktop system, and look which modules are loaded to support it. (lsmod before and after). Then glue 'kmod-' before it and look if it is an existing package.

[AndrewZ]

Normally you just search for chipset name/model like 'rt5370 linux kernel driver'.
Another good source of information is https://en.wikipedia.org/wiki/Comparison_of_open-source_wireless_drivers
You can see there that 5370 is served by rt2800usb.
Here is a reverse process, but sometimes it is good to verify the initial guess:
This is a page about rt2800usb: https://wireless.wiki.kernel.org/en/users/drivers/rt2800usb
RT5370 is not there, but if you will click on device list there, you will see the entry with 5370:

Ralink	RT5370	RT5370	0x148f	0x5370