On Fri, Jun 10, 2016 at 12:39:57PM -0700, Brian Norris wrote: > The LP8556 datasheet describes an EN/VDDIO input, which serves "both as > a chip enable and as a power supply reference for PWM, SDA, and SCL > inputs." The LP8556 that I'm testing doesn't respond properly if I try > to talk I2C to it too quickly after enabling VDDIO, and the LP8555 > datasheet mentions a t_RESPONSE delay of up to 1 millisecond. > > Support this EN/VDDIO by adding a regulator property to the binding; > enabling this regulator at probe time; and sleeping for 1 to 2ms, if the > EN/VDDIO regulator was provided. > > Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx> > --- > v2: s/TS8555/LP8555/ in comment (typo) > > .../devicetree/bindings/leds/backlight/lp855x.txt | 2 ++ I would have picked 'vddio' as the name, but it's fine. Acked-by: Rob Herring <robh@xxxxxxxxxx> > drivers/video/backlight/lp855x_bl.c | 29 ++++++++++++++++++++++ > 2 files changed, 31 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
