• Tony Lindgren's avatar
    ARM: dts: Disable HDMI CEC internal pull-ups · 3a8ed20d
    Tony Lindgren authored
    Devices using an external encoder, ESD protection and level shifter
    such as tpd12s015 or ip4791cz12 have the CEC pull in the encoder
    chip. And on var-som-om44, there is external pull up resistor R30.
    
    So the internal CEC pull-up resistor needs to be disabled as otherwise
    the external and internal pull are parallel making the pull value
    much smaller than intended. This leads into the CEC not working as
    reported by Hans Verkuil <hverkuil@xs4all.nl>.
    Reported-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
    Cc: Dmitry Lifshitz <lifshitz@compulab.co.il>
    Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
    Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
    3a8ed20d
omap4-sdp-es23plus.dts 631 Bytes