lkml.org 
[lkml]   [2019]   [Apr]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] soc: rockchip: Set the proper PWM for rk3288
Date
Am Dienstag, 9. April 2019, 22:49:05 CEST schrieb Douglas Anderson:
> The rk3288 SoC has two PWM implementations available, the "old"
> implementation and the "new" one. You can switch between the two of
> them by flipping a bit in the grf.
>
> The "old" implementation is the default at chip power up but isn't the
> one that's officially supposed to be used. ...and, in fact, the
> driver that gets selected in Linux using the rk3288 device tree only
> supports the "new" implementation.
>
> Long ago I tried to get a switch to the right IP block landed in the
> PWM driver (search for "rk3288: Switch to use the proper PWM IP") but
> that got rejected. In the mean time the grf has grown a full-fledged
> driver that already sets other random bits like this. That means we
> can now get the fix landed.
>
> For those wondering how things could have possibly worked for the last
> 4.5 years, folks have mostly been relying on the bootloader to set
> this bit. ...but occasionally folks have pointed back to my old patch
> series [1] in downstream kernels.
>
> [1] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1391597.html
>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>

applied for 5.2

Thanks
Heiko


\
 
 \ /
  Last update: 2019-04-11 13:43    [W:0.032 / U:10.600 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site