Messages in this thread | | | Date | Fri, 17 Feb 2012 08:37:01 -0800 | From | Mark Brown <> | Subject | Re: [PATCH V2 2/3] gpio: gpiolib: Support for open drain/collector gpios |
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On Fri, Feb 17, 2012 at 08:26:21PM +0530, Laxman Dewangan wrote: > Adding support for the open drain gpio on which client > can specify the open drain property through GPIO flag > GPIOF_OPEN_DRAIN at the time of gpio request. > The open drain pins are normally pulled high and it > cannot be driven to output with value of 1 and so > when client request for setting the pin to HIGH, the > gpio will be set to input direction to make pin in tristate > and hence PULL-UP on pins will make the state to HIGH. > The open drain pin can be driven to LOW by setting output > with value of 0.
Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> [unhandled content-type:application/pgp-signature] | |