Re: [PATCH v3 4/7] power: supply: max8997_charger: Set CHARGER current limit

From: Krzysztof Kozlowski
Date: Wed Dec 23 2020 - 03:28:05 EST


On Wed, Dec 23, 2020 at 08:09:55AM +0000, Timon Baetz wrote:
> On Tue, 22 Dec 2020 09:40:04 +0100, Krzysztof Kozlowski wrote:

(...)
> > > .name = "max8997_pmic",
> > > .type = POWER_SUPPLY_TYPE_BATTERY,
> > > @@ -170,6 +237,33 @@ static int max8997_battery_probe(struct platform_device *pdev)
> > > return PTR_ERR(charger->battery);
> > > }
> > >
> > > + charger->reg = devm_regulator_get(&pdev->dev, "charger");
> >
> > The code looks good but isn't it breaking all existing platforms?
>
> So there is 2 other DTS in the kernel sources that are using MAX8997
> pmic:
> - Insignal Origen evaluation board
> - Samsung Trats
> Non of them have charging regulators.

But still the power supply was probing on them (if not the error you
mentioned). Now, the charger will fail.

> Also probing of the charger has been failing for long time because of
> https://lore.kernel.org/lkml/20201109194251.562203-2-timon.baetz@xxxxxxxxxxxxxx/
> but that seems to land in 5.11.

That's a good argument supporting introduced breakage. Use it in commit
message. Don't hide such information.

> That being said, I guess I could make extcon and charger-supply
> optional if you prefer.

Since at least two boards will loose now power supply, I don't think you
have a choice.

Best regards,
Krzysztof