lkml.org 
[lkml]   [2019]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/2] ASoC: pcm3168a: Poor man's RST gpio handling
Date
Hi,

when the codec RST input is connected to a GPIO it needs to be pulled high in
order to take the pcm3168a out from reset and to make it respond to register
accesses via i2c.

I have a board where one GPIO line is connected to two pcm3168a codec so runtime
handling of the RST gpio is not possible (one codec would place the other codec
to reset as well).

The only possible solution is to request the gpio with
GPIOD_FLAGS_BIT_NONEXCLUSIVE flag, ask it to be high initially and never touch
it again.

If the optinal GPIO is not described then issue the reset as the driver did.

Regards,
Peter
---
Peter Ujfalusi (2):
bindings: sound: pcm3168a: Document optional RST gpio
ASoC: pcm3168a: Add support for optional RST gpio handling

.../devicetree/bindings/sound/ti,pcm3168a.txt | 7 ++++
sound/soc/codecs/pcm3168a.c | 38 +++++++++++++++++--
2 files changed, 41 insertions(+), 4 deletions(-)

--
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

\
 
 \ /
  Last update: 2019-11-13 13:47    [W:0.079 / U:2.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site