[PATCH v3] i2c: stm32f7: Add atomic_xfer method to driver

[Andi Shyti]

Hi Pierre-Yves, Alain,

mind taking a look here?

[...]

> @@ -357,6 +357,7 @@ struct stm32f7_i2c_dev {
>  	u32 dnf_dt;
>  	u32 dnf;
>  	struct stm32f7_i2c_alert *alert;
> +	bool atomic;

this smells a bit racy here, this works only if the xfer's are
always sequential.

What happens when we receive at the same time two xfer's, one
atomic and one non atomic?

Andi