[U-Boot] The CONFIG_DM_I2C_COMPAT option is not available

[Heiko Schocher]

Hello Chuanhua Han,

Am 16.05.2019 um 13:44 schrieb Chuanhua Han:
> hi, Heiko Schocher
> 
> Some soc related files use i2c_read, i2c_write similar function interface,
> 
> if you do not use the CONFIG_DM_I2C_COMPAT option to compile,
> 
> there will be a function undefined compilation error,

For which board, which driver?

> but if you do CONFIG_DM_I2C_COMPAT=y When compiling,
> 
> there will be the following warnings:
> 
> ===================== WARNING ======================
> 
> This board uses CONFIG_DM_I2C_COMPAT. Please remove
> 
> (possibly in a subsequent patch in your series)
> 
> before sending patches to the mailing list.
> 
> ====================================================
> 
> If I do ONFIG_DM_I2C_COMPAT=y, do I need to implement i2c_read, i2c_write such as the function 
> interface definition in the i2c controller driver?

No.

> But these function declarations are all from include/i2c.h, if CONFIG_DM_I2C=y, these functions are 
> not declared.

Intentionally.

> How should I be compatible with these old-style interfaces?

You should port the parts which break to DM model.

bye,
Heiko
> look forward to your reply!
> 
> Thanks,
> 
> Chuanhua
> 

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