Re: [PATCH] pwm-pca9685: Allow any of the 16 PWMs to be used as a GPIO

[Thierry Reding <thierry.reding@gmail.com>]

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On Tue, Sep 20, 2016 at 05:40:56PM +0300, Mika Westerberg wrote:
> The PCA9685 controller has full on/off bit for each PWM channel. Setting
> this bit bypasses the PWM control and the line works just as it would be a
> GPIO. Furthermore in Intel Galileo it is actually used as GPIO output for
> discreet muxes on the board.
> 
> This patch adds GPIO output only support for the driver so that we can
> control the muxes on Galileo using standard GPIO interfaces available in
> the kernel. GPIO and PWM functionality is exclusive so only one can be
> active at a time on a single PWM channel.
> 
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> ---
>  drivers/pwm/pwm-pca9685.c | 158 +++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 157 insertions(+), 1 deletion(-)

I've applied this with some minor stylistic fixups and removing the
PWM chip if the GPIO chip fails to register.

Please shout if that's not okay.

Thierry

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