there is no loadable module, because the kernel modules are compiled in statically. At least according to what you've posted above.
On Mon, Sep 7, 2015 at 10:06 AM, RJ Wang <[email protected]> wrote: > The .dtb file is about the device tree. It doesn't matter the device > driver is built-in, or a loadable module. Is it right? > > Thanks, > > On Mon, Sep 7, 2015 at 12:11 PM, RJ Wang <[email protected]> wrote: > >> Thanks Robert. In am335x-evmsk.dts, there is leds definition: >> >> >> leds { >> pinctrl-names = "default", "sleep"; >> pinctrl-0 = <&user_leds_default>; >> pinctrl-1 = <&user_leds_sleep>; >> >> compatible = "gpio-leds"; >> >> led@1 { >> label = "evmsk:green:usr0"; >> gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>; >> default-state = "off"; >> }; >> >> led@2 { >> label = "evmsk:green:usr1"; >> gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>; >> default-state = "off"; >> }; >> >> led@3 { >> label = "evmsk:green:mmc0"; >> gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>; >> linux,default-trigger = "mmc0"; >> default-state = "off"; >> }; >> >> led@4 { >> label = "evmsk:green:heartbeat"; >> gpios = <&gpio1 7 GPIO_ACTIVE_HIGH>; >> linux,default-trigger = "heartbeat"; >> default-state = "off"; >> }; >> }; >> >> On this board, there is no gpio when running lsmod. Does this .dts file >> tell me something? >> I am new to this topic. >> >> *Just actually look at the kernel dts file for you board.* >> >> The above leds in .dts tells me something? >> >> Thanks, >> >> >> On Mon, Sep 7, 2015 at 11:05 AM, Robert Nelson <[email protected]> >> wrote: >> >>> >>> On Sep 7, 2015 9:32 AM, "RJ Wang" <[email protected]> wrote: >>> > >>> > On link >>> > https://www.kernel.org/doc/Documentation/gpio/sysfs.txt >>> > it is talked about gpio >>> > >>> > It has comments: >>> > >>> > Note that standard kernel drivers exist for common "LEDs and Buttons" >>> > GPIO tasks: "leds-gpio" and "gpio_keys", respectively. Use those >>> > instead of talking directly to the GPIOs; they integrate with kernel >>> > frameworks better than your userspace code could. >>> > >>> > >>> > What category does GPIO in BeagleBone Black belong to? >>> >>> Led-gpio >>> >>> > >>> > What is about the built-in GPIO in my AM3358 SK board? >>> >>> Just actually look at the kernel dts file for you board. >>> >>> Regards, >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/beagleboard/GoYJdV9MI3c/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
