• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 98 subscribers
  • Views 1958 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

bq32000 dts adding

Mohamed Sarjoondeen K M
Intellectual 605 points
Other Parts Discussed in Thread: BQ32000

Hi team,


We are using BQ320000 RTC in our imx6 platform.

Linux 3.10.53 is used.

In the kernel, I can see rtc-bq32k.c driver present under drivers/rtc/.

I would like to know about the changes that need to be done in the DTS file. I am newbie to DTS and I have worked in older kernel(DTS free implementation)

I have attached the .c and dts file. please check the changes that I have done. Will it work ??

4111.rtc-bq32k.c

Please check from line lines 17 and from lines 172. Does this enough in .c file for DTS bindings ??

1374.imx6qdl.dtsi.txt

Is above changes is enough in DTS file. check from line 901

Please check and clarify me.

Thanks in Advance.

Sarjoon

  • 0
    TI__Guru 55345 points

    Hello Sarjoon,

    This one with the device tree binding, taken from the documentation of the latest SDK, should work on your board:

    * TI BQ32000                I2C Serial Real-Time Clock

Required properties:
- compatible: Should contain "ti,bq32000".
- reg: I2C address for chip

Optional properties:
- trickle-resistor-ohms : Selected resistor for trickle charger
       Values usable are 1120 and 20180
       Should be given if trickle charger should be enabled
- trickle-diode-disable : Do not use internal trickle charger diode
       Should be given if internal trickle charger diode should be disabled
Example:
       bq32000: rtc@68 {
               compatible = "ti,bq32000";
               trickle-resistor-ohms = <1120>;
               reg = <0x68>;
       };

    Best regards,
    Kemal

  • 0 in reply to Kemal R. Shakir
    Intellectual 605 points

    Dear Kemal,


    Thanks for sharing the code.

    I will use. But one doubt I have is I cant find the device trees "compatible" in the rtc-bq32k.c file

    I mean I cant find the "of compatible" table in the .c file I can see only "bq32k_id" table.

    In the .c file its mentioned as "bq32000" in bq32k_id table whereas in the DTS you mentioned as "ti,bq32000" compatible is not matching know ?

    Anything need to be done ?

    Where and how we can do the changes

  • 0 in reply to Mohamed Sarjoondeen K M
    TI__Guru 55345 points
    This part of the code should do the trick:
    static const struct i2c_device_id bq32k_id[] = {
    { "bq32000", 0 },
    { }