Re: [U-Boot] question about software i2c multi instance

Hi Bo,

Hi Heiko, After check the software i2c code, I found it can not support multi instances, although it has I2C_SOFT_DECLARATIONS2, I2C_SOFT_DECLARATIONS3, I2C_SOFT_DECLARATIONS4. Because, when do GPIO operation, there is only one pair of CONFIG_SOFT_I2C_GPIO_SCL and CONFIG_SOFT_I2C_GPIO_SDA. So, if want to support multi instances, it needs to extend the GPIO configuration for SCL/SDA, am I right?

Some time ago we had a similar problem with SW I2C code. Please look into Samsung's trats board implementation.

However, such approach might be outdated, since Przemek is working on porting this functionality to device model:

https://patchwork.ozlabs.org/patch/448460/

Thanks.

Best Regards, Bo Shen