On Thu, Feb 26, 2015 at 8:41 AM, Sonic Zhang <[email protected]> wrote:
> From: Sonic Zhang <[email protected]> > > The blackfin pinmux and gpio controller doesn't allow user to set up 1 pin > for both GPIO and peripheral function. So, check both gpio_owner and > mux_owner before approving the pin request. > > Signed-off-by: Sonic Zhang <[email protected]> So since there are pin controllers that can do this even though your pin controller can't, you cannot forbit it for everyone like this. We have discussed adding a field to struct pinctrl_desc, bool strict, that would make the core disallow GPIOs and functions to be used on a pin at the same time. So if this behaviour is desired for a certain pin controller then implement it like so: add bool strict to the struct pinctrl_desc, and only do the above strict check for pin controllers that set it, and set it for your pin controller. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
