On 08/29/2013 05:48 AM, George Cherian wrote: > On 8/29/2013 4:07 PM, Chanwoo Choi wrote: ... >> I tested various development board based on Samsung Exynos series SoC. >> Although some gpio of Exynos series SoC set high state(non zero, 1) as >> default value, >> this gpio state could mean off state, disconnected or un-powered state >> according to gpio. >> Of course, above explanation about specific gpio don't include all gpios. >> This is meaning that there is possibility. > > okay then how about adding a flag for inverted logic too. something > like this > > if(of_property_read_bool(np,"inverted_gpio)) > gpio_usbvid->gpio_inv = 1; > > And always check on this before deciding? Don't do this. GPIO specifiers in DT typically include a "flags" cell that describes certain GPIO properties. One of those properties is signal inversion. You can use of_get_named_gpio_flags() to retrieve those flags. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
