lkml.org 
[lkml]   [2022]   [Jun]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] drm/ssd130x: Use new regmap bulk write support to drop custom bus
Hi Javier,

On Sat, Jun 18, 2022 at 07:43:38PM +0200, Javier Martinez Canillas wrote:
> Data writes for the ssd130x 4-wire SPI protocol need special handling, due
> the Data/Command control (D/C) pin having to be toggled prior to the write.
>
> The regmap API only allowed drivers to provide .reg_{read,write} callbacks
> to do per register read/write, but didn't provide a way for drivers to do
> the same for bulk read/writes.
>
> For this reason, a custom regmap bus was used by the driver just to define
> a bulk write callback that implements the D/C pin toggling. But the regmap
> API has been extended to support defining bulk read/write handlers, so the
> custom regmap bus is not needed anymore and could just be dropped.
>
> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Patch looks good, but obviously needs the dependencies sorted out.
Acked-by: Sam Ravnborg <sam@ravnborg.org>

Sam

\
 
 \ /
  Last update: 2022-06-24 21:37    [W:0.043 / U:0.384 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site