dm3730 驱动

你可以看document下的gpio相关的文档,对于其他驱动kernel提供标准的gpio接口.

document 下有个gpio.txt. 我上面说的那些函数就是gpio.txt里的gpio接口函数。可我用gpio_request()函数申请了好几个个gpio端口用dmesg命令查看内核消息时，都是返回错误，申请不到。请您指点一下····

返回什么错误,看看kernel的error,调一下.

一下是我拷贝的内核消息，不知道哪错了怎么分析，恳请指点一下，感激不尽！

root@beagleboard:/home/lxq# insmod omap3_gpio_drv.ko

[   89.994445] ------------[ cut here ]------------

[   89.999114] WARNING: at drivers/gpio/gpiolib.c:101 gpio_ensure_requested+0x50/0x118()

[   90.006988] autorequest GPIO-15

[   90.010131] Modules linked in: omap3_gpio_drv(+) omaplfb pvrsrvkm

[   90.016296] [<c003d988>] (unwind_backtrace+0x0/0xdc) from [<c0065448>] (warn_slowpath_common+0x48/0x60)

[   90.025756] [<c0065448>] (warn_slowpath_common+0x48/0x60) from [<c0065498>] (warn_slowpath_fmt+0x24/0x30)

[   90.035369] [<c0065498>] (warn_slowpath_fmt+0x24/0x30) from [<c01f978c>] (gpio_ensure_requested+0x50/0x118)

[   90.045166] [<c01f978c>] (gpio_ensure_requested+0x50/0x118) from [<c01f98cc>] (gpio_direction_output+0x78/0x138)

[   90.055389] [<c01f98cc>] (gpio_direction_output+0x78/0x138) from [<bf038140>] (omap3_gpio_init+0x10/0x98 [omap3_gpio_drv])

[   90.066497] [<bf038140>] (omap3_gpio_init+0x10/0x98 [omap3_gpio_drv]) from [<c00373b4>] (do_one_initcall+0x5c/0x1b4)

[   90.077087] [<c00373b4>] (do_one_initcall+0x5c/0x1b4) from [<c008d684>] (sys_init_module+0xb0/0x1dc)

[   90.086273] [<c008d684>] (sys_init_module+0xb0/0x1dc) from [<c0037f80>] (ret_fast_syscall+0x0/0x2c)

[   90.095367] ---[ end trace abd06b7e97215090 ]---

[   90.104553] gpio register_chrdev success, major = 251

[   90.109649] mux: Broken omap_cfg_reg(15) entry

[   90.114562] ------------[ cut here ]------------

[   90.119232] WARNING: at arch/arm/plat-omap/mux.c:60 omap_cfg_reg+0x1c/0x2c()

[   90.126586] Modules linked in: omap3_gpio_drv(+) omaplfb pvrsrvkm

[   90.133056] [<c003d988>] (unwind_backtrace+0x0/0xdc) from [<c0065448>] (warn_slowpath_common+0x48/0x60)

[   90.142761] [<c0065448>] (warn_slowpath_common+0x48/0x60) from [<c004ed70>] (omap_cfg_reg+0x1c/0x2c)

[   90.152130] [<c004ed70>] (omap_cfg_reg+0x1c/0x2c) from [<bf03817c>] (omap3_gpio_init+0x4c/0x98 [omap3_gpio_drv])

[   90.162567] [<bf03817c>] (omap3_gpio_init+0x4c/0x98 [omap3_gpio_drv]) from [<c00373b4>] (do_one_initcall+0x5c/0x1b4)

[   90.173339] [<c00373b4>] (do_one_initcall+0x5c/0x1b4) from [<c008d684>] (sys_init_module+0xb0/0x1dc)

[   90.182678] [<c008d684>] (sys_init_module+0xb0/0x1dc) from [<c0037f80>] (ret_fast_syscall+0x0/0x2c)

[   90.192077] ---[ end trace abd06b7e97215091 ]---

[   90.196716] failed to request GPIO gpio_pin       

gpio_request()我是用这个函数申请gpio的。恳请指导··········

请问楼主有结果了没？最近我也在学习DM3730，您现在是前辈了···

请先确认相应的gpio是否已经request