Tool/software: Linux
Hi Pavel,
Your suggestion to fix the problem in the post 
worked for me. Thanks very much.
I configured GPIO2 similarly. I then configured GPIO2_2 as input and am triggering a software interrupt using
GPIOTriggerPinInt(GPIO_BASE_ADDR, 0, GPIO_LED_PIN);
GPIO_BASE_ADDR = (0x48055000U)
GPIO_LED_PIN = 0x02
I get the following on the Linux console:
[ 408.989728] ------------[ cut here ]------------
[ 408.994379] WARNING: CPU: 0 PID: 0 at /opt/PHYTEC_BSPs/yocto_ti/build/arago-tmp-external-linaro-toolchain/work-shared/am57xx-phycore-rdk/kernel-source/drivers/bus/omap_l3_noc.c:147 l3_interrupt_handler+0x25c/0x368()
[ 409.013582] 44000000.ocp:L3 Custom Error: MASTER DSP1_MDMA TARGET L4_PER1_P3 (Idle): Data Access in User mode during Functional access
[ 409.025715] Modules linked in: rpmsg_proto bc_example(O) sha512_generic sha512_arm sha1_generic sha1_arm_neon sha1_arm md5 cbc sha256_generic sha256_arm hmac drbg xfrm_user xfrm4_tunnel ipcomp xfrm_ipcomp esp4 ah4 bluetooth af_key xfrm_algo virtio_rpmsg_bus pruss_intc snd_soc_omap_hdmi_audio omap_wdt omap_aes_driver pru_rproc pvrsrvkm(O) pruss omap_sham ti_vpe dwc3_omap ti_sc ti_vpdma extcon rtc_omap rtc_palmas omap_rng omap_des rng_core omap_remoteproc remoteproc virtio virtio_ring sch_fq_codel gdbserverproxy(O) cryptodev(O) cmemk(O)
[ 409.073659] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O 4.4.12 #8
[ 409.080823] Hardware name: Generic DRA74X (Flattened Device Tree)
[ 409.086938] Backtrace:
[ 409.089412] [<c00130a4>] (dump_backtrace) from [<c00132a0>] (show_stack+0x18/0x1c)
[ 409.097011] r7:c02e2d18 r6:200f0193 r5:00000000 r4:c09d318c
[ 409.102736] [<c0013288>] (show_stack) from [<c02b6aa8>] (dump_stack+0x90/0xa4)
[ 409.109998] [<c02b6a18>] (dump_stack) from [<c003387c>] (warn_slowpath_common+0x88/0xb8)
[ 409.118121] r7:c02e2d18 r6:00000093 r5:00000009 r4:c09b5d30
[ 409.123845] [<c00337f4>] (warn_slowpath_common) from [<c00338e4>] (warn_slowpath_fmt+0x38/0x40)
[ 409.132578] r8:00000017 r7:c08af0a4 r6:00000000 r5:c08aec6c r4:c08aed10
[ 409.139354] [<c00338b0>] (warn_slowpath_fmt) from [<c02e2d18>] (l3_interrupt_handler+0x25c/0x368)
[ 409.148261] r3:ee1b6140 r2:c08aed10
[ 409.151862] r4:80080003
[ 409.154419] [<c02e2abc>] (l3_interrupt_handler) from [<c0077b30>] (handle_irq_event_percpu+0xb4/0x160)
[ 409.163763] r10:c0a02d2d r9:ee1b0480 r8:00000017 r7:00000000 r6:00000000 r5:ee1b04e0
[ 409.171666] r4:ee1b6640
[ 409.174219] [<c0077a7c>] (handle_irq_event_percpu) from [<c0077c1c>] (handle_irq_event+0x40/0x64)
[ 409.183126] r10:c09b64d0 r9:c06e91e4 r8:ee008000 r7:00000000 r6:c09bc08c r5:ee1b04e0
[ 409.191027] r4:ee1b0480
[ 409.193581] [<c0077bdc>] (handle_irq_event) from [<c007af54>] (handle_fasteoi_irq+0xc0/0x194)
[ 409.202139] r7:00000000 r6:c09bc08c r5:ee1b04e0 r4:ee1b0480
[ 409.207856] [<c007ae94>] (handle_fasteoi_irq) from [<c007715c>] (generic_handle_irq+0x2c/0x3c)
[ 409.216502] r7:00000000 r6:00000000 r5:00000017 r4:c09b0424
[ 409.222221] [<c0077130>] (generic_handle_irq) from [<c0077434>] (__handle_domain_irq+0x64/0xbc)
[ 409.230961] [<c00773d0>] (__handle_domain_irq) from [<c000948c>] (gic_handle_irq+0x40/0x7c)
[ 409.239344] r9:c06e91e4 r8:fa213000 r7:fa212000 r6:c09b5ef0 r5:fa21200c r4:c09b6868
[ 409.247166] [<c000944c>] (gic_handle_irq) from [<c0013d80>] (__irq_svc+0x40/0x74)
[ 409.254678] Exception stack(0xc09b5ef0 to 0xc09b5f38)
[ 409.259750] 5ee0: 00000001 00000000 fe600000 00000000
[ 409.267963] 5f00: c09b4000 c09b6484 00000000 00000000 c09b5f60 c06e91e4 c09b64d0 c09b5f4c
[ 409.276177] 5f20: c09b5f2c c09b5f40 c00268f4 c0010540 600f0013 ffffffff
[ 409.282816] r9:c06e91e4 r8:c09b5f60 r7:c09b5f24 r6:ffffffff r5:600f0013 r4:c0010540
[ 409.290640] [<c0010518>] (arch_cpu_idle) from [<c006d8d8>] (default_idle_call+0x28/0x34)
[ 409.298769] [<c006d8b0>] (default_idle_call) from [<c006db3c>] (cpu_startup_entry+0x204/0x264)
[ 409.307419] [<c006d938>] (cpu_startup_entry) from [<c06df500>] (rest_init+0x90/0x94)
[ 409.315192] r7:00000000
[ 409.317747] [<c06df470>] (rest_init) from [<c095dd88>] (start_kernel+0x400/0x40c)
[ 409.325259] r5:c0a05000 r4:c0a05040
[ 409.328866] [<c095d988>] (start_kernel) from [<80008090>] (0x80008090)
[ 409.335420] ---[ end trace c5f33a20b59aa006 ]---
I can configure the same I/O as an output and it works well.
I have configured that DSP1 IRQ crossbar as follows
*(CTRL_CORE_DSP1_IRQ_56_57) &= ~(DSP1_IRQ_56);
*(CTRL_CORE_DSP1_IRQ_56_57) |= ENABLE_GPIO2_INT_VECTOR;
#define ENABLE_GPIO2_INT_VECTOR 0x00000019
#define DSP1_IRQ_56 0x000001FF
Also I am using the following APIs to enable the interrupt
/* Set the callback function */
GPIO_setCallback(USER_LED0, AppGpioCallbackFxn);
/* Enable GPIO interrupt on the specific gpio pin */
GPIO_enableInt(USER_LED0);
USER_LED0 corresponds to gpio2_2
Any suggestions?
Thanks very much.
Regards,
Shaunak
