Re: [PATCH v5 6/7] i2c: designware: enable SLAVE in platform module

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Wed, 2016-12-28 at 14:43 +0000, Luis Oliveira wrote:
> - Slave mode selected in platform module (devicetree support only)
> - Check for ACPI - not supported in SLAVE mode:
>   - Changed the ifndef style to the use of ACPI_HANDLE that returns
> NULL
>     if the device was not enumerated from ACPI namespace.

I'm not sure what is wrong with ACPI?
 
> @@ -264,9 +297,16 @@ static int dw_i2c_plat_probe(struct
> platform_device *pdev)
>  	if (r)
>  		return r;
>  
> -	dev->functionality = I2C_FUNC_10BIT_ADDR |
> DW_IC_DEFAULT_FUNCTIONALITY;
> -
> -	i2c_dw_configure_master(pdev);

> +	if (ACPI_HANDLE(&pdev->dev) == NULL) {

I don't think you need this at all.

> +		device_for_each_child_node(&pdev->dev, child) {

This is resource agnostic.

> +			fwnode_property_read_u32(child, "reg", &reg);

This is as well.

> +			if (reg & I2C_OWN_SLAVE_ADDRESS)
> +				i2c_dw_configure_slave(pdev);
> +			else
> +				i2c_dw_configure_master(pdev);
> +		}
> +	} else
> +		i2c_dw_configure_master(pdev);


-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy