From: Hans de Goede <hdegoede@redhat.com>
To: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: "Rafael J . Wysocki" <rafael@kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Mark Gross <markgross@kernel.org>,
Andy Shevchenko <andy@kernel.org>, Wolfram Sang <wsa@kernel.org>,
Lee Jones <lee.jones@linaro.org>,
Sebastian Reichel <sre@kernel.org>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Ard Biesheuvel <ardb@kernel.org>, Len Brown <lenb@kernel.org>,
linux-acpi@vger.kernel.org, Yauhen Kharuzhy <jekhor@gmail.com>,
Tsuchiya Yuto <kitakar@gmail.com>,
Fabio Aiuto <fabioaiuto83@gmail.com>,
platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org
Subject: Re: [PATCH v4 01/20] power: supply: core: Refactor power_supply_set_input_current_limit_from_supplier()
Date: Mon, 31 Jan 2022 15:39:35 +0100 [thread overview]
Message-ID: <91bfb535-9442-9413-cfca-1b5cb08826ed@redhat.com> (raw)
In-Reply-To: <YffmDCHY6csr0uyD@smile.fi.intel.com>
Hi Andy,
Thank you for the reviews.
On 1/31/22 14:37, Andy Shevchenko wrote:
> On Sun, Jan 30, 2022 at 09:45:38PM +0100, Hans de Goede wrote:
>> Some (USB) charger ICs have variants with USB D+ and D- pins to do their
>> own builtin charger-type detection, like e.g. the bq24190 and bq25890 and
>> also variants which lack this functionality, e.g. the bq24192 and bq25892.
>>
>> In case the charger-type; and thus the input-current-limit detection is
>> done outside the charger IC then we need some way to communicate this to
>> the charger IC. In the past extcon was used for this, but if the external
>> detection does e.g. full USB PD negotiation then the extcon cable-types do
>> not convey enough information.
>>
>> For these setups it was decided to model the external charging "brick"
>> and the parameters negotiated with it as a power_supply class-device
>> itself; and power_supply_set_input_current_limit_from_supplier() was
>> introduced to allow drivers to get the input-current-limit this way.
>>
>> But in some cases psy drivers may want to know other properties, e.g. the
>> bq25892 can do "quick-charge" negotiation by pulsing its current draw,
>> but this should only be done if the usb_type psy-property of its supplier
>> is set to DCP (and device-properties indicate the board allows higher
>> voltages).
>>
>> Instead of adding extra helper functions for each property which
>> a psy-driver wants to query from its supplier, refactor
>> power_supply_set_input_current_limit_from_supplier() into a
>> more generic power_supply_get_property_from_supplier() function.
>
> ...
>
>> + ret = power_supply_get_property_from_supplier(bdi->charger,
>> + POWER_SUPPLY_PROP_CURRENT_MAX,
>> + &val);
>> + if (ret == 0)
>
> Can it be as simple as
>
> if (ret)
> return;
>
> ...
>
>
> ?
>
> Or did I misunderstand the meaning of 0?
Yes that would be better and together with some of the other tweaks
you've suggested I believe that this warrants a version 5. So I'll
address a v5 addressing all your comment.
Regards,
Hans
next prev parent reply other threads:[~2022-01-31 14:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-30 20:45 [PATCH v4 resend 00/20] power-suppy/i2c/extcon: Fix charger setup on Xiaomi Mi Pad 2 and Lenovo Yogabook Hans de Goede
2022-01-30 20:45 ` [PATCH v4 01/20] power: supply: core: Refactor power_supply_set_input_current_limit_from_supplier() Hans de Goede
2022-01-31 13:37 ` Andy Shevchenko
2022-01-31 13:43 ` Andy Shevchenko
2022-01-31 14:39 ` Hans de Goede [this message]
2022-01-30 20:45 ` [PATCH v4 02/20] power: supply: bq25890: Rename IILIM field to IINLIM Hans de Goede
2022-01-30 20:45 ` [PATCH v4 03/20] power: supply: bq25890: Reduce reported CONSTANT_CHARGE_CURRENT_MAX for low temperatures Hans de Goede
2022-01-30 20:45 ` [PATCH v4 04/20] power: supply: bq25890: Add a bq25890_rw_init_data() helper Hans de Goede
2022-01-30 20:45 ` [PATCH v4 05/20] power: supply: bq25890: Add support to skip reset at probe() / remove() Hans de Goede
2022-01-30 20:45 ` [PATCH v4 06/20] power: supply: bq25890: Add support to read back the settings from the chip Hans de Goede
2022-01-30 20:45 ` [PATCH v4 07/20] power: supply: bq25890: Enable charging on boards where we skip reset Hans de Goede
2022-01-30 20:45 ` [PATCH v4 08/20] power: supply: bq25890: Drop dev->platform_data == NULL check Hans de Goede
2022-01-30 20:45 ` [PATCH v4 09/20] power: supply: bq25890: Add bq25890_set_otg_cfg() helper Hans de Goede
2022-01-30 20:45 ` [PATCH v4 10/20] power: supply: bq25890: Add support for registering the Vbus boost converter as a regulator Hans de Goede
2022-01-30 20:45 ` [PATCH v4 11/20] power: supply: bq25890: On the bq25892 set the IINLIM based on external charger detection Hans de Goede
2022-01-30 20:45 ` [PATCH v4 12/20] power: supply: bq25890: Support higher charging voltages through Pump Express+ protocol Hans de Goede
2022-01-31 13:48 ` Andy Shevchenko
2022-01-31 15:18 ` Hans de Goede
2022-01-31 16:19 ` Andy Shevchenko
2022-01-30 20:45 ` [PATCH v4 13/20] power: supply: bq25890: Use the devm_regmap_field_bulk_alloc() helper Hans de Goede
2022-01-30 20:45 ` [PATCH v4 14/20] mfd: intel_soc_pmic_chtwc: Add cht_wc_model data to struct intel_soc_pmic Hans de Goede
2022-01-30 20:45 ` [PATCH v4 15/20] i2c: cht-wc: Make charger i2c-client instantiation board/device-model specific Hans de Goede
2022-01-31 13:50 ` Andy Shevchenko
2022-01-30 20:45 ` [PATCH v4 16/20] extcon: intel-cht-wc: Use new cht_wc_model intel_soc_pmic field Hans de Goede
2022-01-30 20:45 ` [PATCH v4 17/20] extcon: intel-cht-wc: Support devs with Micro-B / USB-2 only Type-C connectors Hans de Goede
2022-01-31 13:54 ` Andy Shevchenko
2022-01-31 15:21 ` Hans de Goede
2022-01-30 20:45 ` [PATCH v4 18/20] extcon: intel-cht-wc: Refactor cht_wc_extcon_get_charger() Hans de Goede
2022-01-31 13:56 ` Andy Shevchenko
2022-01-31 15:22 ` Hans de Goede
2022-01-30 20:45 ` [PATCH v4 19/20] extcon: intel-cht-wc: Add support for registering a power_supply class-device Hans de Goede
2022-01-30 20:45 ` [PATCH v4 20/20] extcon: intel-cht-wc: Report RID_A for ACA adapters Hans de Goede
-- strict thread matches above, loose matches on Subject: below --
2021-12-06 9:32 [PATCH v4 00/20] power-suppy/i2c/extcon: Fix charger setup on Xiaomi Mi Pad 2 and Lenovo Yogabook Hans de Goede
2021-12-06 9:32 ` [PATCH v4 01/20] power: supply: core: Refactor power_supply_set_input_current_limit_from_supplier() Hans de Goede
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