# Re: \[PATCH v9 03/12\] mfd: simple-mfd-i2c: Save the register client data

- From: Lee Jones \<hidden\>
- Date: 2021-08-06 11:38:44 
- List: linux-devicetree
- Page: https://ratatoskr.run/linux-devicetree/2021/08/1470168
- Thread: https://ratatoskr.run/linux-devicetree/2021/08/1469990/t.md

```text
On Fri, 06 Aug 2021, Alistair Francis wrote:

> Signed-off-by: Alistair Francis <redacted>
> ---
>  drivers/mfd/simple-mfd-i2c.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
> index 583e8c7924af..633a2b28b6cb 100644
> --- a/drivers/mfd/simple-mfd-i2c.c
> +++ b/drivers/mfd/simple-mfd-i2c.c
> @@ -48,6 +48,8 @@ static int simple_mfd_i2c_probe(struct i2c_client *i2c)
>  	if (IS_ERR(regmap))
>  		return PTR_ERR(regmap);
>  
> +	i2c_set_clientdata(i2c, regmap);
> +

No need to store this here.

Just do this in the child device:

     dev_get_regmap(pdev->dev.parent, NULL);

>  	/* If no MFD cells are spedified, use register the DT child nodes instead */
>  	if (!simple_mfd_data || !simple_mfd_data->mfd_cell)
>  		return devm_of_platform_populate(&i2c->dev);

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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```