Re: [PATCH v2 2/3] power: supply: qcom_battmgr: add Xiaomi taoyao support

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] Missing exposure of charge control thresholds for the Taoyao variant.
--

--- Patch [2]: [PATCH v2 2/3] power: supply: qcom_battmgr: add Xiaomi taoyao support ---
commit 7dca11719c74cb544dcbbafa2547e26c0a56fd43
Author: Stanislav Zaikin <zstaseg@gmail.com>

power: supply: qcom_battmgr: add Xiaomi taoyao support
    
The Xiaomi taoyao firmware defines an additional BATT_CONSTANT_CURRENT
property (ID 12) between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting
all higher battery property IDs by one.

> diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
> index 7716eb9e1aff5..a16d226ac5b30 100644
> --- a/drivers/power/supply/qcom_battmgr.c
> +++ b/drivers/power/supply/qcom_battmgr.c
> @@ -452,16 +453,87 @@ static const u8 sm8350_bat_prop_map[] = {
>  	[POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD] = BATT_CHG_CTRL_END_THR,
>  };
>  
> +/*
> + * Xiaomi Taoyao firmware has BATT_CONSTANT_CURRENT (ID 12) inserted
> + * between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting all subsequent
> + * IDs by one.
> + */
> +static const u8 taoyao_bat_prop_map[] = {

[ ... ]

> +	[POWER_SUPPLY_PROP_POWER_NOW] = BATT_POWER_NOW + 1,
> +	[POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD] = BATT_CHG_CTRL_START_THR + 1,
> +	[POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD] = BATT_CHG_CTRL_END_THR + 1,
> +};

[Severity: Medium]
While you've explicitly mapped the charge control thresholds here for the
Taoyao variant, does qcom_battmgr_probe() actually assign a power supply
descriptor that exposes these properties?

Looking at qcom_battmgr_probe(), QCOM_BATTMGR_TAOYAO will fall through to
using sm8350_bat_psy_desc:

	} else {
		if (battmgr->variant == QCOM_BATTMGR_SM8550)
			psy_desc = &sm8550_bat_psy_desc;
		else
			psy_desc = &sm8350_bat_psy_desc;

Since sm8350_bat_psy_desc lacks
POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD and
POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD, will these properties
be silently unavailable for Taoyao devices?

If they should be supported, does this require a dedicated power supply
descriptor or using sm8550_bat_psy_desc instead?

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260818151039.409767-1-zstaseg@gmail.com?part=2