Hi,

On Thu, Sep 15, 2022 at 12:30:14AM +0800, cy_huang wrote:
> From: ChiYuan Huang <cy_huang@richtek.com>
> 
> Add support for the RT9471 3A 1-Cell Li+ battery charger.
> 
> The RT9471 is a highly-integrated 3A switch mode battery charger with
> low impedance power path to better optimize the charging efficiency.
> 
> Co-developed-by: Alina Yu <alina_yu@richtek.com>
> Signed-off-by: Alina Yu <alina_yu@richtek.com>
> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> ---
> [...]
> +static DEVICE_ATTR_RW(sysoff_enable);
> +static DEVICE_ATTR_RW(port_detect_enable);
> +
> +static struct attribute *rt9471_sysfs_entries[] = {
> +	&dev_attr_sysoff_enable.attr,
> +	&dev_attr_port_detect_enable.attr,
> +	NULL
> +};
> +
> +static const struct attribute_group rt9471_attr_group = {
> +	.attrs	= rt9471_sysfs_entries,
> +};
> +
> +static const struct attribute_group *rt9471_attr_groups[] = {
> +	&rt9471_attr_group,
> +	NULL
> +};

Iff these custom properties are required (see response to the last
patch), then 'ATTRIBUTE_GROUPS()' can be used to simplify this part
a bit.

-- Sebastian