[PATCH V6 2/6] power: supply: sgm41542: Add SG Micro sgm41542 charger

[Sebastian Reichel]

Hi,

On Mon, Jun 08, 2026 at 12:55:17PM -0500, Chris Morgan wrote:
> Add support for the SG Micro SGM41542 charger/boost converter.
> Driver was adapted from Rockchip BSP driver [1] and confirmed
> with vendor datasheet [2].
> 
> [1] https://github.com/rockchip-linux/kernel/blob/develop-6.6/drivers/power/supply/sgm41542_charger.c
> [2] https://www.sg-micro.de/rect/assets/1e8de70b-657e-4156-be68-a64fdbe8e418/SGM41541_SGM41542.pdf
> 
> Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
> ---
>  drivers/power/supply/Kconfig            |    8 +
>  drivers/power/supply/Makefile           |    1 +
>  drivers/power/supply/sgm41542_charger.c | 1057 +++++++++++++++++++++++
>  3 files changed, 1066 insertions(+)
>  create mode 100644 drivers/power/supply/sgm41542_charger.c
> [...]
> +static int sgm4154x_set_recharge_volt_ua(struct sgm4154x_device *sgm, int recharge_volt)
> +{
> +	int reg_val;
> +	int ret;
> +
> +	recharge_volt = recharge_volt / 1000;
> +
> +	reg_val = (recharge_volt - SGM4154X_VRECHRG_OFFSET_MV) / SGM4154X_VRECHRG_STEP_MV;

These are the only millivolt offset/steps, so drop the 1000 divison
and simply do:

#define SGM4154X_VRECHRG_OFFSET_UV      100000
#define SGM4154X_VRECHRG_STEP_UV        100000

reg_val = (recharge_volt - SGM4154X_VRECHRG_OFFSET_UV) / SGM4154X_VRECHRG_STEP_UV;

Otherwise LGTM.

> [...]

Greetings,

-- Sebastian
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