All Questions
Tagged with device-treei2c
4 questions
1vote
0answers
17views
Adding MCP23017 to device-tree and accessing ICs connected to expander
I try access multiple ICs via I2C over the MCP23017 I/O Expander for a custom embedded board. I know ICs I2C adresses. How should I add the MCP23017 to the device-tree? I think I need to add the ICs ...
- 35
0votes
0answers
117views
Multiple I2C GPIO Expander give probing error due to shared reset pin
I'm editing the kernel device tree for a custom board. I have two GPIO expanders (pcal6416) connected to i2c3 bus. The two expanders share the same CPU pin as reset. Here is the initial device tree &...
- 101
0votes
0answers
76views
Unable to communicate with I2C fuel gauge
I'm trying to communicate with an LTC2959 (datasheet) battery fuel gauge via I2C from my linux-based SBC. I'm not succeeding and I suspect a hardware or device-tree issue. The IC address is 0xC6 which ...
- 193
1vote
0answers
419views
Unable to enable TLV320AIC3104 codec driver /simple sound card for iMx8M with SAI2 BCLK/MCLK provided with external clock
I am trying to access codec driver (TLV320AIC3104) connected to iMX8M over I2C3 and SAI2 lines. The codec clocks bclk is 4096000 and it is provided from an FPGA and its mclk is grounded. iMx8M SOM ...
