Hello guys,I have a zedboard kit and a pmod_ad1, I `m studying use the zed,and I follow the refrence design Linux Device Driver - Custom HDL PCore ,I follow the guid ,and there`s some unimportant difference (use u-boot 15.0 ,kernel 4.0 ,devicetree_pmod_ad1_ipcore.all of this is download from analogdevice git). when I download all files to SD card and turn on zed,the hdmi ,usb works well ,The IIO scope devices list shows the two channel of AD7476, but when I turn on the channel ,system will be get stuck, and terminal shows Unable to handle kernel NULL pointer dereference at virtual address 00000000, and oops tells NULL pointer,
PC is at 0x0
LR is at iio_buffer_data_available+0x10/0x14
I check the iio driver and find nothing usefull, I think I need some help, Thanks
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = d6ab0000
[00000000] *pgd=16810831, *pte=00000000, *ppte=00000000
Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 1 PID: 1736 Comm: hexdump Not tainted 3.17.0 #1
task: df76a940 ti: df660000 task.ti: df660000
PC is at 0x0
LR is at iio_buffer_data_available+0x10/0x14
pc : [<00000000>] lr : [<c03193b4>] psr: a0030013
sp : df661f20 ip : c031a424 fp : 00015120
r10: 00001000 r9 : df660000 r8 : b6fa4000
r7 : df661f88 r6 : d6802280 r5 : df6d0800 r4 : df5b34c0
r3 : 00000000 r2 : 00001000 r1 : c045974c r0 : df5b34c0
Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 18c5387d Table: 16ab004a DAC: 00000015
Process hexdump (pid: 1736, stack limit = 0xdf660240)
Stack: (0xdf661f20 to 0xdf662000)
