Hi ,
This is customer board , TP IRQ ( GPIO6_11 ) triggered level is set to "IRQ_TYPE_LEVEL_LOW" , it couldn't be triggered in normal after android boot completed .
But the IRQ can be triggered at follow operations :
1. After kernel boot completed ,and before zygote service start up ,at this time ,IRQ can be triggered when touch the TP panel .
2. After zygote service start up , and send data to the console ( Uart for debug ) all the time . The IRQ will be triggered when touch the TP panel .
3. After zygote service start up , touch the TP panel ,the GPIO6_11 is confirmed has gone down from the oscilloscope . At this time ,the IRQ is not triggered .
But after typed "cat /d/gpio" in the adb shell , the IRQ is triggered . And the GPIO6_11 is low from the result of the command "cat /d/gpio" .
Here is the configuration about TP IRQ (GPIO6_11) :
DTS :
978 atmel_mxt_ts@4a {
979 compatible ="atmel,maxtouch";
980 reg = <0x4a>;
981 interrupt-parent = <&gpio6>;
982 interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
983
984 /* pins used by touchscreen */
985 pinctrl-names = "pmx_ts_active","pmx_ts_suspend","pmx_ts_release";
986 pinctrl-0 = <&ts_pins>;
987 pinctrl-1 = <&ts_suspend>;
988 pinctrl-2 = <&ts_release>;
989 atmel,reset-gpio = <&gpio6 10 0>;
990 //atmel,power-gpio = <&gpio5 17 0>;
991 atmel,irq-gpio = <&gpio6 11 IRQ_TYPE_LEVEL_LOW>;
993
994 atmel,display-coords = <0 0 1920 1080>;
995 atmel,panel-coords = <0 0 1920 1080>;
996 /*atmel,i2c-pull-up;*/
997 atmel,no-force-update;
998 };
Driver to request the IRQ :
request_threaded_irq(data->client->irq, NULL,
2118 mxt_interrupt,
2119 IRQ_TYPE_LEVEL_LOW | IRQF_ONESHOT,
2120 data->client->name, data);
Here is our analysis about this problem :
1. Check the crossbar configuration , GPIO6_IRQ_1 has mapped to the MPU . Pls refer the attachment for detail crossbar.txt.
| 137 | 0x4A002B4A | 29 | GPIO6_IRQ_1 | GPIO6 | GPIO6 interrupt 1
2.Check the interrupts registered by J6 , GPIO6_IRQ register in success .
root@jacinto6evm:/ # cat /proc/interrupts
cat /proc/interrupts
CPU0 CPU1
........
202: 348 0 CBAR 29 Level 4805d000.gpio
214: 348 0 4805d000.gpio 11 Level maxtouch
........
3.Check the mode of the PAD (AB4) which used as GPIO6_11 ,it has been set as input mode & pull down .
127|root@jacinto6evm:/ # omapconf read 0x4a003778
omapconf read 0x4a003778
0004000E
4. Kerenel Log is as follow ,Pls refer the attachment .kernel_log_for_GPIO6_11_IRQ_exception.txt
[ 20.749966] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 21.808446] omap-iommu 55082000.mmu: 55082000.mmu: version 2.1
[ 23.590722] [baker][hdmi] omap_connector_get_modes
[ 23.595678] [baker] hdmic_check_timings 170 ---
[ 25.393383] init: Service 'bootanim' (pid 229) exited with status 0
[ 27.358660] [baker] mxt_interrupt --
[ 27.364895] [baker] mxt_interrupt --end
[ 27.479665] [baker] mxt_interrupt --
[ 27.485915] [baker] mxt_interrupt --end
[ 31.233672] [baker] mxt_interrupt --
[ 31.239893] [baker] mxt_interrupt --end
[ 31.362664] [baker] mxt_interrupt --
[ 31.368851] [baker] mxt_interrupt --end
[ 36.013874] [baker] mxt_interrupt --
[ 36.021809] [baker] mxt_interrupt --end
[ 84.144215] [baker] mxt_interrupt --
[ 84.150714] [baker] mxt_interrupt --end
[ 93.590972] [baker] mxt_interrupt --
[ 93.598936] [baker] mxt_interrupt --end
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///////////////////////////////////////////////////////////////////////////////////////
// After android boot completed , the IRQ is not triggered .
At this time ,I touch the Panel ,the GPIO6_11 goes down , but the IRQ is not Triggered .
And I typed the keypad with this console , it triggered as follow .
shell@jacinto6evm:/ $ [ 106.533830] [baker] mxt_interrupt --
j[ 106.544266] [baker] mxt_interrupt --end
We have ever tried to set the "Enable Wakeup" bit (1<<24) of the PAD AB4 ,but it couldn't be set . The register value is always 0x0004000E ,rather than 0x0104000E .
We tried to use other GPIOs IRQ such as GPIO8_0 / GPIO2_1 , it got the same result .
We guess that CPU maybe sleep while touch the TP panel . Pls give us some comments to solve this problem .
Thanks .
// Baker
