Thanks, got it. BTW, how to trigger GPIO level in user space application? I also found arch/powerpc/platforms/52xx/mpc52xx_gpio.c is a good example. Any reply is appreciate. BRs, H. Johnny 2009/9/23 Peter Korsgaard <jacmet@xxxxxxxxxx>: >>>>>> "Johnny" == Johnny Hung <johnny.hacking@xxxxxxxxx> writes: > > Johnny> Hi All: > Johnny> Is there a alreday written GPIO dirver or example for > Johnny> MPC8313/similar ppc platform. It looks like many people need GPIO > Johnny> dirver to control LED, etc... I think is it possible to write a > Johnny> general gpio driver for all ppc platform and only need to modify gpio > Johnny> iomap information of dtb file. Please give me a advice. Thanks in > Johnny> advanced. > > Sure, it's arch/powerpc/sysdev/mpc8xxx_gpio.c, included since 2.6.28. To > use it, simply enable CONFIG_MPC8xxx_GPIO and add a gpio-controller node > to your dts, similar to how it's done in > arch/powerpc/boot/dts/mpc837*_rdb.dts. > > See Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt for details of > the dts bindings. > > -- > Bye, Peter Korsgaard > -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
