I2C General call from kernel driver/module on IMX6D

miroslavkopecek — Wed, 21 Nov 2018 15:00:04 GMT

Hello,
would anyone know a 'standard' way how to do a general-call-address reset of a device from device driver ?

1) Short description of issue:

I am trying to write my own driver for TLV493D (magnetic sensor on i2c bus).

Datasheet of that IC in chapter 5.7.1 states:
"A general reset is trigged by calling the address 0x00 in the I2 C interface. This generates an internal reset..."

In my use the reset is needed for the device to function properly however i was unsuccessful in trying to write to the address 0x00. (7bit mode) - as it is the reserved general call address.

2) Question:
Is there a way to write to the 0x00 device address on i2c bus from kernel module ?
(I am using system with imx6 dual core)

thank you for all inputs on this topic.

datasheet link:
https://www.infineon.com/dgdl/Infineon-TLV493D-A1B6_3DMagnetic-UM-v01_03-EN.pdf?fileId=5546d46261d5e6820161e75721903ddd

Re: I2C General call from kernel driver/module on IMX6D

b36401 — Wed, 13 Feb 2019 02:17:53 GMT

You can access i2c bus with device like /dev/i2c-0

i.MX Processors中的主题 Re: I2C General call from kernel driver/module on IMX6D

I2C General call from kernel driver/module on IMX6D

Re: I2C General call from kernel driver/module on IMX6D