Messages in this thread | | | Date | Wed, 20 Apr 2011 22:26:14 +0800 | Subject | Re: [PATCH 1/2] gpio: add pin biasing and drive mode to gpiolib | From | Haojian Zhuang <> |
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On Tue, Apr 19, 2011 at 4:51 PM, Kyungmin Park <kmpark@infradead.org> wrote: >> >> Leaving aside the current input/output and on/off bits I would go for >> being able to do >> >> gpio_get_property(gpio, GPIO_BIAS, GPIO_BIAS_WHATEVER); >> gpio_set_property(gpio, GPIO_BIAS, GPIO_BIAS_WHATEVER_ELSE); > > One more consideration, not mentioned previous time, is that pin > configuration for power down mode. > Samsung SoCs has retention GPIO configurations at sleep (suspend) > mode. and restore it at resume time. > it's need to reduce power and proper operation after suspend. > I have a little confusion. In ARM SoC, a lot of pins are used as multi-functions.
Before suspend, it may be configured as some function that isn't GPIO. Is it a goal that avoid declaring gpio_request() for suspend and updating the setting of pin?
Linus, Are these two patches are post in mailing list? I can't find your second patch in this patch series? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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