How to link character driver with DTS file

Hi Naveen,

Please see from the TRM "Table 6-1. ARM Cortex-A8 Interrupts" the interrupt numbers and how they are initialize in dts file from <>/board-support/linux-3.12.10-ti2013.12.01/arch/arm/boot/dts/am33xx.dtsi for example.

BR
Ivan

Hi lvan Matrakov

am check my dts file the interrupt number is 16 ,my character driver without dts file reading and writing fifo data , am planning to read data interrupt based so am using request_irq call :

request_irq(16,adc_irq_handler,0,"adcsample",NULL);

but my handler function is not called and when i check cat /proc/interrupts it will show
16: 0 INTC 0 adcsample

so without dts file how can i called my intterpt request and this is the way is correct or not
and any other method calling interrupt number .

Regards,
Naveen

Hi Naveen,

What type of interrupt triggering ?

set_irq_type()

http://processors.wiki.ti.com/index.php/Linux_PSP_GPIO_Driver_Guide#IRQ_handling

What is the interrupt no 16 ?
ADC interrupt ?
Have you checked the INTERRUPT NO 16 in your processor data sheet or TRM to see check which peripheral got mapped to this INT 16 ?
What are you trying to do ?

Hi sir,

16 ADC_TSC_GENINT ADC_TSC (Touchscreen) . Refer by - spruh73k.pdf

am writing adc character driver ,so i configure all registers and reading the data fifo0 .

but my problem is reading data based on interrupts , so am trying to implement in interrupts

reading fifo data based on interrupts ,so am trying to add interrupt request and reading data in handler,

so when i call request_irq not allocated interrupt number . when i call request_irq it registered successful but not proper allocated log file :

cat /proc/interrupts - my driver 16: 0 INTC 0 adcsample

ti driver 32: 0 INTC 16 TI-AM *****

so my requirement is my character driver continuously reading fifi0 data based on interrupt



Regards,
Naven