i.MX ProcessorsのトピックRe: Kernel Panic in imx6ull

Kernel Panic in imx6ull

mathew_k_t — Wed, 09 May 2018 10:18:04 GMT

Hi,

I'm using iMX6ULL custom board. In my application, I read data from two AFE4490 and iMX6 reads data registers after the ADC_READY interrupt(pulse width 0.24us). I configured ADC_READY pins as gpio-keys. In ISR, it generates a uevent as below

static void gpio_keys_gpio_work_func(struct work_struct *work)
{
   struct gpio_button_data *bdata =container_of(work, struct gpio_button_data, work.work);
   char *envp[2];
   char state_buf[10];

   if (bdata->irq == 36) {
       snprintf(state_buf, sizeof(state_buf),"STATE=%s", "1");
       envp[0] = state_buf;

       envp[1] = NULL;
       kobject_uevent_env(&bdata->input->dev.kobj, KOBJ_ONLINE, envp);
   }
}

iMX6 generates interrupts on ADC_READY signal.

1. But i'm not getting any events at userspace. What's the issue in the configuration?

2. After 30 minutes, kernel panic occurs due to out of Memory issue. How to clear uevent buffer?

Best Regards

Re: Kernel Panic in imx6ull

jimmychan — Tue, 29 May 2018 08:35:30 GMT

for your reference : https://community.nxp.com/message/1015101

Re: Kernel Panic in imx6ull

mathew_k_t — Fri, 01 Jun 2018 06:33:22 GMT

Hi jimmychan,

Thank you for your response.

Could you help me to write a udev rule to avoid uevents to get processed by udev.

Particularly with following parameters

KERNEL[190.552267] online /devices/platform/gpio-keys/input/input1 (input)
ACTION=online
DEVPATH=/devices/platform/gpio-keys/input/input1
EV=3
KEY=1480 0 0 0
MODALIAS=input:b0019v0001p0001e0100-e0,1,kramlsfw
NAME="gpio-keys"
PHYS="gpio-keys/input0"
PRODUCT=19/1/1/100
PROP=0
SEQNUM=32421
STATE=1
SUBSYSTEM=input