ok so this is not the actual way gary clark jr plays the song but i think the chords are 
right and its a much easier way to play it
basically he uses 3 chords:[ C# D# Cm ] through the whole song, if not you can transpose 
it one halfstep down and put a capo on the first fret and play [ C D Bm ]
the way i play it is strumming always down the amount of times shown next (where the "_" 
part would be a little silence:

C#C#C#C#D#D#D#D#CmCmCmC#_C#C#C#

C# D# Cm C#
Ooh ah...
         C# (x43121@1)    D# (x43121@3)         Cm (x3101x@1)C#It (x43121@1)gets cold outside standing all alone
C# (x43121@1)          D# (x43121@3)      Cm (x3101x@1)  C#Spendin' (x43121@1)all day on the telephone
C# (x43121@1)  D# (x43121@3)        CmC#
All I wanna do is go home
      C# (x43121@1)       D# (x43121@3)  CmC#
But I won't stop here

Checkpoints got us paranoid
They think they've got another boy
Well I got somethin' you need to know about it, and I can't stop now
I gotta green light I'm on my way
Just turnin' to a brighter day
Everything ain't goin' my way
But I won't stop now
Well I won't breakdown
Well I won't breakdown
Well I won't breakdown
Well I won't breakdown
Once again we do a show and
Leave with a pocket of zero dollar bills
And we feel it's a steal
But we won't breakdown
Backseat of the van
Thinkin' damn I'm the man
With the master plan
And I can't give a damn about nothin' at all
I'm gonna do my thing
And not stop now
So I keep on bringin' it all
Till I reach the light I
I won't stop now, I can see the light
I'm already feelin' late at the light
So I can't breakdown
Well I won't breakdown, breakdown
Well I won't breakdown, breakdown
Well I won't breakdown, breakdown
Well I won't breakdown, breakdown
Well I can see it, feel it, I know (breakdown...)
Breakdown...
Well I won't breakdown
Well I won't breakdown
Well I won't breakdown
Well I can't breakdown
Well I won't breakdown
Well I won't breakdown
Well I won't breakdown
Well I won't breakdown, breakdown