On Tue, May 5, 2020 at 4:29 PM Calvin Johnson
<calvin.john...@oss.nxp.com> wrote:
>
> Extract phy_id from compatible string. This will be used by
> fwnode_mdiobus_register_phy() to create phy device using the
> phy_id.
> +int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
> +{
> + const char *cp;
> + unsigned int upper, lower;
> + int ret;
> +
> + ret = fwnode_property_read_string(fwnode, "compatible", &cp);
> + if (!ret) {
if (ret)
return ret;
will help a lot with readability of this.
> + if (sscanf(cp, "ethernet-phy-id%4x.%4x",
> + &upper, &lower) == 2) {
> + *phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF);
How upper can be bigger than 0xfff? Same for lower.
> + return 0;
> + }
> + }
> + return -EINVAL;
> +}
--
With Best Regards,
Andy Shevchenko
