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Message-ID: <899d6604-7b15-ac37-c624-987a2bb7875e@rocketmail.com>
Date: Mon, 8 May 2023 23:18:28 +0200
From: Jakob Hauser <jahau@...ketmail.com>
To: Sebastian Reichel <sebastian.reichel@...labora.com>
Cc: Lee Jones <lee@...nel.org>, Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Beomho Seo <beomho.seo@...sung.com>,
Chanwoo Choi <cw00.choi@...sung.com>,
Stephan Gerhold <stephan@...hold.net>,
Raymond Hackley <raymondhackley@...tonmail.com>,
Pavel Machek <pavel@....cz>, Axel Lin <axel.lin@...ics.com>,
ChiYuan Huang <cy_huang@...htek.com>,
Linus Walleij <linus.walleij@...aro.org>,
Henrik Grimler <henrik@...mler.se>, linux-pm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH v4 7/8] power: supply: rt5033_battery: Adopt status
property from charger
Hi Sebastian,
On 08.05.23 13:35, Sebastian Reichel wrote:
> Hi,
>
> On Sat, May 06, 2023 at 05:54:34PM +0200, Jakob Hauser wrote:
>> The rt5033-battery fuelgauge can't get a status by itself. The rt5033-charger
>> can, let's get this value.
>>
>> Tested-by: Raymond Hackley <raymondhackley@...tonmail.com>
>> Signed-off-by: Jakob Hauser <jahau@...ketmail.com>
>> ---
>> drivers/power/supply/rt5033_battery.c | 24 ++++++++++++++++++++++++
>> 1 file changed, 24 insertions(+)
>>
>> diff --git a/drivers/power/supply/rt5033_battery.c b/drivers/power/supply/rt5033_battery.c
>> index 5c04cf305219..a6520716d813 100644
>> --- a/drivers/power/supply/rt5033_battery.c
>> +++ b/drivers/power/supply/rt5033_battery.c
>> @@ -12,6 +12,26 @@
>> #include <linux/mfd/rt5033-private.h>
>> #include <linux/mfd/rt5033.h>
>>
>> +static int rt5033_battery_get_status(struct i2c_client *client)
>> +{
>> + struct power_supply *charger;
>> + union power_supply_propval val;
>> + int ret;
>> +
>> + charger = power_supply_get_by_name("rt5033-charger");
>> + if (!charger)
>> + return POWER_SUPPLY_STATUS_UNKNOWN;
>> +
>> + ret = power_supply_get_property(charger, POWER_SUPPLY_PROP_STATUS, &val);
>> + if (ret) {
>> + power_supply_put(charger);
>> + return POWER_SUPPLY_STATUS_UNKNOWN;
>> + }
>
> struct rt5033_battery *battery = i2c_get_clientdata(client);
> ret = power_supply_get_property_from_supplier(battery->psy, POWER_SUPPLY_PROP_STATUS, &val);
> if (ret)
> val.intval = POWER_SUPPLY_STATUS_UNKNOWN;
I don't think this works. There is no direct relationship between
rt5033-charger and rt5033-battery. They operate independently from each
other.
I had a short try and the status property of rt5033-battery was "unknown".
Just for the record, the full function I tried was:
static int rt5033_battery_get_status(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
union power_supply_propval val;
int ret;
ret = power_supply_get_property_from_supplier(battery->psy,
POWER_SUPPLY_PROP_STATUS,
&val);
if (ret)
val.intval = POWER_SUPPLY_STATUS_UNKNOWN;
return val.intval;
}
Later on I added a read-out of the "ret" value. It is "-19". I guess
that's the "return -ENODEV;" from function
power_supply_get_property_from_supplier(). [2]
[2]
https://github.com/torvalds/linux/blob/v6.4-rc1/drivers/power/supply/power_supply_core.c#L397-L421
>> +
>> + power_supply_put(charger);
>> + return val.intval;
>> +}
>> +
>> static int rt5033_battery_get_capacity(struct i2c_client *client)
>> {
>> struct rt5033_battery *battery = i2c_get_clientdata(client);
>> @@ -84,6 +104,9 @@ static int rt5033_battery_get_property(struct power_supply *psy,
>> case POWER_SUPPLY_PROP_CAPACITY:
>> val->intval = rt5033_battery_get_capacity(battery->client);
>> break;
>> + case POWER_SUPPLY_PROP_STATUS:
>> + val->intval = rt5033_battery_get_status(battery->client);
>> + break;
>> default:
>> return -EINVAL;
>> }
>> @@ -96,6 +119,7 @@ static enum power_supply_property rt5033_battery_props[] = {
>> POWER_SUPPLY_PROP_VOLTAGE_OCV,
>> POWER_SUPPLY_PROP_PRESENT,
>> POWER_SUPPLY_PROP_CAPACITY,
>> + POWER_SUPPLY_PROP_STATUS,
>> };
>>
>> static const struct regmap_config rt5033_battery_regmap_config = {
>> --
>> 2.39.2
>>
>
> Otherwise LGTM.
>
> -- Sebastian
Kind regards,
Jakob
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