Re: GPIO driver for MPC8313.
Johnny == Johnny Hung johnny.hack...@gmail.com 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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: GPIO driver for MPC8313.
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 jac...@sunsite.dk: Johnny == Johnny Hung johnny.hack...@gmail.com 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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: GPIO driver for MPC8313.
Johnny == Johnny Hung johnny.hack...@gmail.com writes: Johnny Thanks, got it. BTW, how to trigger GPIO level in user space Johnny application? I also found Johnny arch/powerpc/platforms/52xx/mpc52xx_gpio.c is a good Johnny example. Any reply is appreciate. Through sysfs. See 'Sysfs Interface for Userspace' section of Documentation/gpio.txt -- Bye, Peter Korsgaard -- To unsubscribe from this list: send the line unsubscribe linux-embedded in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: GPIO driver for MPC8313.
Many thanks for your help. I will try it. 2009/9/23 Peter Korsgaard jac...@sunsite.dk: Johnny == Johnny Hung johnny.hack...@gmail.com writes: Johnny Thanks, got it. BTW, how to trigger GPIO level in user space Johnny application? I also found Johnny arch/powerpc/platforms/52xx/mpc52xx_gpio.c is a good Johnny example. Any reply is appreciate. Through sysfs. See 'Sysfs Interface for Userspace' section of Documentation/gpio.txt -- Bye, Peter Korsgaard -- To unsubscribe from this list: send the line unsubscribe linux-embedded in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
