am335x irq definition

Hi,

I will ask the SW team to look at this.

Hi,

lofna kumari said:

I am using Linux 3.2 version and took from SDK5 & 6

Having in mind that you customize the kernel (using sources from two sdk versions), can you verify that this gpio pin is NOT used by other part of your system (that may be overriding your settings)?

Best Regards,

Yordan

Hi,

Please find the status:

root@am335x-evm:/home# devmem2 0x44e10994

/dev/mem opened.
Memory mapped at address 0x40163000.
Read at address 0x44E10994 (0x40163994): 0x00000027

root@am335x-evm:/home# cat /proc/interrupts 

CPU0
4: 0 INTC omap2_elm
12: 4770 INTC edma
14: 0 INTC edma_error
16: 1 INTC tsc
18: 56 INTC musb-hdrc.0
19: 138 INTC musb-hdrc.1
29: 13 INTC mmc1
36: 65088 INTC da8xx_lcdc
40: 0 INTC cpsw.0
43: 0 INTC cpsw.0
64: 14553 INTC mmc0
68: 7207 INTC gp timer
70: 197 INTC omap_i2c
71: 0 INTC omap_i2c
72: 2385 INTC OMAP UART0
75: 0 INTC rtc0
76: 0 INTC rtc0
77: 0 INTC wkup_m3
78: 1 INTC wkup_m3_txev
93: 0 INTC cpsw.0
94: 0 INTC cpsw.0
166: 0 GPIO mmc0
Err: 0

Please let us know if there is any issue.

Thanks,

Lofna

Hi Lofna,

root@am335x-evm:/home# cat /proc/interrupts  shows that you've correctly muxed the gpio pin on AM335x pads.

Here is what I would check:

-  Check that the corresponding interrupt line is properly initilized (enabled on global level)? As described in Section 6.2.1 Initialization Sequence of device TRM.

You should set IRQ priority via the corresponding INTC_ILRm register  

and enable the interrupt line through INTC_MIRn & INTC_MIR_SETn registers.  

- Also check if interrupts/wakeups are enabled on GPIO level:

GPIO_IRQSTATUS_SET_0/1 registers

GPIO_IRQWAKEN_0/1 registers

See if the GPIO_LEVELDETECT0/1, GPIO_RISINGDETECT & GPIO_FALLINGDETECT register values meet the requirements of your use case.

Hope this helps.

Best Regards,
Yordan

Can you run "lsmod" to see what modules are running?  Running SDK 6.00 on the EVM I see the following:

root@am335x-evm:~# cat /proc/interrupts
           CPU0
  4:          0      INTC  omap2_elm
 12:       3586      INTC  edma
 14:          0      INTC  edma_error
 16:          0      INTC  tsc, tiadc
 17:          0      INTC  cppi41_dma
 18:          0      INTC  musb-hdrc.0
 19:          1      INTC  musb-hdrc.1
 29:       1260      INTC  mmc1
 36:       2681      INTC  da8xx_lcdc
 37:          2      INTC  SGX ISR
 40:          0      INTC  cpsw
 43:          0      INTC  cpsw
 64:       8882      INTC  mmc0
 68:       2307      INTC  gp timer
 70:        230      INTC  omap_i2c
 71:         58      INTC  omap_i2c
 72:        223      INTC  OMAP UART0
 75:          0      INTC  rtc0
 76:          0      INTC  rtc0
 77:          0      INTC  wkup_m3
 78:          1      INTC  wkup_m3_txev
 93:          0      INTC  cpsw
 94:          0      INTC  cpsw
109:        349      INTC  omap4-sham
162:          0      GPIO  volume-up
163:          0      GPIO  volume-down
166:          0      GPIO  mmc0
217:          0      GPIO  matrix-keypad
218:          0      GPIO  matrix-keypad
219:          0      GPIO  matrix-keypad
273:          1      GPIO  wl12xx
Err:          0

root@am335x-evm:~# lsmod
Module                  Size  Used by
g_mass_storage         37599  0
bufferclass_ti          5060  0
omaplfb                11075  0
pvrsrvkm              170641  2 omaplfb,bufferclass_ti
wl12xx_sdio             3986  0
wl12xx                202633  0
mac80211              289010  1 wl12xx
cfg80211              189234  2 mac80211,wl12xx

You're missing a bunch of modules. Did you manually insert wl12_sdio or did it show up by itself?

Hello,

I've done a similar thing using AM3358 and I was able to get an interrupt from a GPIO. I think that in order for the interrupt to show under /proc/interrupts you should call the function:

int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *dev_name, void *dev_id);

where

const char *dev_name - The string passed to request_irq is used in /proc/interrupts to show the owner of the interrupt.

The wl12xx module will inherently request a gpio.  I think he either needs to run "depmod -a" to properly setup all his modules so that they automatically are installed on boot, or else he needs to manually call "modprobe wl12xx".

Hi,

After booting done calibrator script it has inserted all the modules, please check.

root@am335x-evm:~# lsmod

Module Size Used by
uvcvideo 56763 0
g_mass_storage 37599 0
wl12xx 201275 0
wl12xx_sdio 3898 0
mac80211 276214 1 wl12xx
cfg80211 176782 2 mac80211,wl12xx

But i did't get the wlan0 interface in our board. also i am not seeing any wl12 interrupts

Thanks,

Have you tried getting an interrupt from another pin from THE SAME GPIO port? (though your board may not allow such an experiment)