Hi Matthias, Le 30/03/2013 14:09, Matthias Brugger a écrit : > > El 27/03/2013 18:16, "Mylene Josserand" <Mylene.Josserand@xxxxxxxxxxx > <mailto:Mylene.Josserand@xxxxxxxxxxx>> va escriure: > > > > Hi everyone, > > > > > > I have a problem with gpio functions. > > My kernel version is 3.8.2 and my SoC is a imX27 on a "home-made" board. > > > > First, when I boot, I had only the "Starting kernel..." message. > > So I rebuild my kernel with CONFIG_DEBUG_KERNEL, CONFIG_DEBUG_LL and > > CONFIG_EARLY_PRINTK. I have also add the line > > "earlyprintk=console,UART0,115200" on the bootargs of my Barebox. > > > > With that, I can see more messages : > > > > [...] > > Unable to handle kernel NULL pointer dereference at virtual address > 0000002c > > pgd = c0004000 > > [0000002c] *pgd=00000000 > > Internal error: Oops: 5 [#1] PREEMPT ARM > > Modules linked in: > > CPU: 0 Not tainted (3.8.2+ #4) > > PC is at __gpio_to_irq+0x1c/0x44 > > LR is at navocap_baseboard_init+0xd8/0x2c8 > > pc : [<c01fd194>] lr : [<c04fd468>] psr: 60000053 > > sp : c7835ef0 ip : 00000079 fp : c05a5628 > > r10: c04f817c r9 : 00000000 r8 : c05a562c > > r7 : c7834000 r6 : 00000004 r5 : c05158c4 r4 : c0578844 > > r3 : 000005ac r2 : c05b0410 r1 : c7834000 r0 : 00000000 > > Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment kernel > > Control: 0005317f Table: a0004000 DAC: 00000017 > > Process swapper (pid: 1, stack limit = 0xc78341b8) > > Stack: (0xc7835ef0 to 0xc7836000) > > 5ee0: c05158c4 c04fd468 00000002 > > 10009000 > > 5f00: 10009fff 00000000 00000200 00000000 00000000 00000000 c05158c4 > > c04fd348 > > 5f20: c0578844 c04f819c c04d23dc c00087f8 00000003 00000003 c04d1b2c > > c06bd6a0 > > 5f40: 00000000 c0578844 c05158c4 00000004 0000008b c05a562c c0515898 > > c04f6378 > > 5f60: c05a5620 c04f62a0 00000003 00000003 c04f6378 c00403e0 00000000 > > 00000000 > > 5f80: c03cfee0 00000000 00000000 00000000 00000000 00000000 00000000 > > c03cfeec > > 5fa0: 00000000 00000000 c03cfee0 c00093b0 00000000 00000000 00000000 > > 00000000 > > 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > > 00000000 > > 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00100000 > > 000a1000 > > [<c01fd194>] (__gpio_to_irq+0x1c/0x44) from [<c04fd468>] > > (navocap_baseboard_init+0xd8/0x2c8) > > [<c04fd468>] (navocap_baseboard_init+0xd8/0x2c8) from [<c04f819c>] > > (customize_machine+0x20/0x30) > > [<c04f819c>] (customize_machine+0x20/0x30) from [<c00087f8>] > > (do_one_initcall+0x2c/0x168) > > [<c00087f8>] (do_one_initcall+0x2c/0x168) from [<c04f62a0>] > > (kernel_init_freeable+0xf4/0x1cc) > > [<c04f62a0>] (kernel_init_freeable+0xf4/0x1cc) from [<c03cfeec>] > > (kernel_init+0xc/0x164) > > [<c03cfeec>] (kernel_init+0xc/0x164) from [<c00093b0>] > > (ret_from_fork+0x14/0x24) > > Code: e0433100 e1a0c000 e7920003 e24dd004 (e590302c) > > ---[ end trace 61bb09c25216d85b ]--- > > Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b > > > > > > The problem is in the function "gpio_to_irq" in my board init functions > > (navocap_baseboard_init). > > > > To know which lines the opps appears, I have followed this tutorial : > > https://wiki.ubuntu.com/Kernel/KernelDebuggingTricks > > > > Thanks to it, I can notice that the opps appears when I called the > > "gpio_to_irq" function in : > > > > ret = request_irq(gpio_to_irq(IMX_GPIO_NR(2,14)), detect_irq, > > IRQF_TRIGGER_FALLING, "imx-mmc-detect", data); > > Make sure your arguments are not NULL (IMX_GPIO_NR, detect_irq and data). > > Some extra printk's before calling request_irq should do. Thank you very much for your help ! I will try that. > > > > > > > I have checked in other boards how to use this function and it is > > configured in the same way. > > I did see where I have made a mistake. Maybe in my config file where I > > have missed a configuration option ? How to solve this opps problem ? It > > would be very great if someone could give me some helps / feedbacks on > > this problem. > > > > Thank you in advance ! > > > > Best regards, > > > > > > -- > > Mylène JOSSERAND > > Navocap > > > > _______________________________________________ > > Kernelnewbies mailing list > > Kernelnewbies@xxxxxxxxxxxxxxxxx <mailto:Kernelnewbies@xxxxxxxxxxxxxxxxx> > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > Best regards, -- Mylène JOSSERAND Navocap _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
