Re: [PATCH] power: supply: sbs-battery: Add PbAc, NiZn, RAM, and ZnAr support

[Sebastian Reichel]

Hi,

On Sun, Jun 21, 2026 at 05:59:52PM +0300, Boris Shtrasman wrote:
> Add support for PbAc, NiZn, RAM, and ZnAr chemistries as defined in the
> Smart Battery Data Specification v1.1 (Section 5.1.30 DeviceChemistry).
> 
> Currently, the sbs-battery driver only handles LION, LiP, NiCd and NiMH.
> The Smart Battery specification defines 8 possible values:
>  - Lead Acid (PbAc)
>  - Lithium Ion (LION)
>  - Nickel Cadmium (NiCd)
>  - Nickel Metal Hydride (NiMH)
>  - Nickel Zinc (NiZn)
>  - Rechargeable Alkaline-Manganese (RAM)
>  - Zinc Air (ZnAr)
>  - Lithium Polymer (LiP)
> 
> Map the missing specification values to their respective core kernel
> POWER_SUPPLY_TECHNOLOGY definitions.
> 
> Link: https://sbs-forum.org/specs/sbdat110.pdf
> Signed-off-by: Boris Shtrasman <borissh1983@xxxxxxxxx>
> ---
>  drivers/power/supply/sbs-battery.c | 8 ++++++++
>  include/linux/power_supply.h       | 4 ++++

This should be two patches, one for the power-supply core and one
for the SBS battery driver.

>  2 files changed, 12 insertions(+)
> 
> diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c
> index 43c48196c167..42a941e99155 100644
> --- a/drivers/power/supply/sbs-battery.c
> +++ b/drivers/power/supply/sbs-battery.c
> @@ -860,6 +860,14 @@ static int sbs_get_chemistry(struct sbs_info *chip,
>  		chip->technology = POWER_SUPPLY_TECHNOLOGY_NiCd;
>  	else if (!strncasecmp(chemistry, "NiMH", 4))
>  		chip->technology = POWER_SUPPLY_TECHNOLOGY_NiMH;
> +	else if (!strncasecmp(chemistry, "PbAc", 4))
> +		chip->technology = POWER_SUPPLY_TECHNOLOGY_PbAc;
> +	else if (!strncasecmp(chemistry, "NiZn", 4))
> +		chip->technology = POWER_SUPPLY_TECHNOLOGY_NiZn;
> +	else if (!strncasecmp(chemistry, "RAM", 3))
> +		chip->technology = POWER_SUPPLY_TECHNOLOGY_RAM;
> +	else if (!strncasecmp(chemistry, "ZnAr", 4))
> +		chip->technology = POWER_SUPPLY_TECHNOLOGY_ZnAr;
>  	else
>  		chip->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
>  
> diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
> index 7a5e4c3242a0..034800cd21da 100644
> --- a/include/linux/power_supply.h
> +++ b/include/linux/power_supply.h
> @@ -83,6 +83,10 @@ enum {
>  	POWER_SUPPLY_TECHNOLOGY_LiFe,
>  	POWER_SUPPLY_TECHNOLOGY_NiCd,
>  	POWER_SUPPLY_TECHNOLOGY_LiMn,
> +	POWER_SUPPLY_TECHNOLOGY_PbAc,
> +	POWER_SUPPLY_TECHNOLOGY_NiZn,
> +	POWER_SUPPLY_TECHNOLOGY_RAM,
> +	POWER_SUPPLY_TECHNOLOGY_ZnAr,
>  };

You need to update the ABI Documentation and the sysfs code to
handle the new properties.

Greetings,

-- Sebastian

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