Hi All, When working on gpio driver for tegra, I found that gpio_request() does not make the corresponding soc pins to gpio mode. It still keeps the pins in SFIO mode. So we need to call two extra function along with gpio_request(): Tegra_gpio_enable() and function for setting the pins in no non-tristate.
Sue to this, the gpio sysfs interface does not work properly from user space /sys/class/gpio/. To make the pin in gpio mode fom user space, need to have changes in kernel. I think the gpio_request() should make the pins to gpio mode and make ready for use. Similarly gpio_free() should again put the pin into sfio mode with tristate disable. Please comment if there is any better way.. Thanks, Laxman -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
