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    SubjectRe: [PATCH 1/2] Documentation/gpio.txt: Explain expected pinctrl interaction
    On Sun, Feb 19, 2012 at 11:27:42PM -0700, Stephen Warren wrote:
    > Update gpio.txt based on recent discussions regarding interaction with the
    > pinctrl subsystem.
    > Previously, gpio_request() was described as explicitly not performing any
    > required mux setup operations etc.
    > Now, gpio_request() is explicitly as explicitly performing any required mux
    > setup operations where possible. In the case it isn't, platform code is
    > required to have set up any required muxing or other configuration prior to
    > gpio_request() being called, in order to maintain the same semantics.

    So what if you need to have the pin as a GPIO, manipulate it as a GPIO,
    and then hand it off to a special function, and then take it back as
    a GPIO before you shut the special function down ?

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      Last update: 2012-02-20 08:43    [W:0.018 / U:4.760 seconds]
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