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SK-AM62B-P1: Issue with TPIC2810D Device Register Setting - Controller Timed Out

Murali Vikash Ganireddy
Intellectual 470 points

Part Number: SK-AM62B-P1
Other Parts Discussed in Thread: SK-AM62

Hi Team,

I am encountering an issue while testing the TPIC2810D device to light an LED using WKUP_I2C0. Whenever I try to set any value to the register, I receive a "Controller timed out" error. Below are the details of my configuration:

  mywkupi2c0_pins_default: mywkupi2c0-default-pins {
+               pinctrl-single,pins = <
+                       AM62X_MCU_IOPAD(0x004c, PIN_INPUT, 0) /* (B9) WKUP_I2C0_SCL */
+                       AM62X_MCU_IOPAD(0x0050, PIN_INPUT, 0) /* (A9) WKUP_I2C0_SDA */
+               >;
+               };
 
 
&wkup_i2c0 {
+       status = "okay";
+       pinctrl-names = "default";
+        pinctrl-0 = <&mywkupi2c0_pins_default>;
+        clock-frequency = <400000>;
+       tpic2810d: tpic2810d@60 {
+                       status = "okay";
+                       compatible = "ti,tpic2810d";
+                       reg = <0x60>;
+       };
+
+};

Please let me know if there are any additional steps or modifications required to resolve this issue.

Regards,

Vikash

  • 0
    TI__Guru** 110790 points

    Hello Vikash,

    What version of SDK are you using?

    What terminal output do you get during bootup around initializing the I2C interface? (e.g., dmesg | grep i2c)

    What do you see with i2cdetect? You want to make sure you are accessing the right I2C interface. More information at
    https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1202980/tmds64gpevm-how-to-disable-i2c-bus-devices/4538179#4538179

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Intellectual 470 points

    Hi Nick,

    SDK version: 09.02.01.09

    root@evm:# i2cdetect -y -r 0
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- [86030.683847] omap_i2c 2b200000.i2c: controller timed out
-- [86031.707843] omap_i2c 2b200000.i2c: controller timed out
-- [86032.731841] omap_i2c 2b200000.i2c: controller timed out
-- [86033.755842] omap_i2c 2b200000.i2c: controller timed out
-- [86034.779843] omap_i2c 2b200000.i2c: controller timed out
-- [86035.803842] omap_i2c 2b200000.i2c: controller timed out


    root@evm:# dmesg | grep i2c
[    0.838636] i2c_dev: i2c /dev entries driver
[    0.924792] omap_i2c 2b200000.i2c: bus 0 rev0.12 at 400 kHz
[    0.925777] omap_i2c 20000000.i2c: bus 1 rev0.12 at 400 kHz
[    0.927273] omap_i2c 20010000.i2c: bus 2 rev0.12 at 100 kHz
[    0.928349] omap_i2c 20020000.i2c: bus 3 rev0.12 at 400 kHz
[    5.851191] i2c i2c-2: Added multiplexed i2c bus 4
[  334.946700] omap_i2c 2b200000.i2c: controller timed out
[  514.466819] omap_i2c 2b200000.i2c: controller timed out
[ 1153.379245] omap_i2c 2b200000.i2c: controller timed out
[ 1154.403245] omap_i2c 2b200000.i2c: controller timed out
[ 1155.427242] omap_i2c 2b200000.i2c: controller timed out
[ 1156.451244] omap_i2c 2b200000.i2c: controller timed out
[ 1157.475244] omap_i2c 2b200000.i2c: controller timed out

    Regards,

    vikash

  • 0 in reply to Murali Vikash Ganireddy
    TI__Guru** 110790 points

    Hello Vikash,

    I assume from your devicetree file you are using the SK-AM62 EVM, and you are trying to use the onchip TPIC2810D. Please let me know if you are using a different setup.

    The TPIC2810D definition in your devicetree file does not look correct to me. Please reference how we define it in arch/arm64/boot/dts/ti/k3-am642-sk.dts.

    You should also refer to the driver's bindings documentation:
    Documentation/devicetree/bindings/gpio/gpio-tpic2810.yaml

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Intellectual 470 points

    Hi,

    We are using the SK-AM62 EVM and attempting to utilize the on-chip TPIC2810D. I have defined it in the same way as in arch/arm64/boot/dts/ti/k3-am642-sk.dts, but I am still encountering issues. Can you assist me with this?

    &wkup_i2c0 {
       status = "okay";
       pinctrl-names = "default";
       pinctrl-0 = <&mywkupi2c0_pins_default>;
       clock-frequency = <400000>;
       tpic2810d: tpic2810d@60 {
                       status = "okay";
                       compatible = "ti,tpic2810d";
                       reg = <0x60>;
                      gpio-controller;
                      gpio-line-names = "LED1","LED2","LED3","LED4","LED5","LED6","LED7","LED8";
       };

};

    Regards, Vikash.

  • 0 in reply to Murali Vikash Ganireddy
    TI__Guru** 110790 points

    Hello Vikash,

    What kinds of issues are you running into now? Do you see any new error outputs on boot? Is there any other debug information you can provide?

    I do not have power or internet in my part of the city, and it looks like I might not have power for a couple more days. So please expect delayed responses (I had to drive to another city to be able to write this response). If I have not responded by next week, feel free to ping the thread.

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Intellectual 470 points

    Hi,

    I have implemented the changes as suggested in the arch/arm64/boot/dts/ti/k3-am642-sk.dts file. Unfortunately, I am still encountering the same issue.

    Could you please assist me further in resolving this matter?

    root@evm:# i2cdetect -y -r 0
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- [86030.683847] omap_i2c 2b200000.i2c: controller timed out
-- [86031.707843] omap_i2c 2b200000.i2c: controller timed out
-- [86032.731841] omap_i2c 2b200000.i2c: controller timed out
-- [86033.755842] omap_i2c 2b200000.i2c: controller timed out
-- [86034.779843] omap_i2c 2b200000.i2c: controller timed out
-- [86035.803842] omap_i2c 2b200000.i2c: controller timed out

  • 0 in reply to Murali Vikash Ganireddy
    TI__Guru** 110790 points

    Hello Vikash,

    To confirm:

    1) Have there been any devicetree changes since your response here:
    https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1364273/sk-am62b-p1-issue-with-tpic2810d-device-register-setting---controller-timed-out/5219420#5219420

    I am now out of the country for the rest of this week. If you are still running into issues next week, I can try to replicate your setup on my EVM.

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Intellectual 470 points

    Hi Nick,

    No device tree changes have been made since the previous response; however, the same problem persists.

    Regards, Vikash