linux-kernel - Re: [PATCH 11/11] power: supply: qcom

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Message-ID: <2d3ff07d-1cd8-4eb6-8b3b-2d0d6f64445f@oss.qualcomm.com>
Date: Fri, 20 Jun 2025 19:00:37 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Casey Connolly <casey.connolly@...aro.org>,
        Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Kees Cook <kees@...nel.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH 11/11] power: supply: qcom_smbx: program aicl rerun time

On 6/19/25 4:55 PM, Casey Connolly wrote:
> We don't know what the bootloader programmed here, but we want to have a
> consistent value. Program the automatic input current limit detection to
> re-run every 3 seconds. This seems to be necessary at least for smb5.
> 
> Signed-off-by: Casey Connolly <casey.connolly@...aro.org>
> ---
>  drivers/power/supply/qcom_smbx.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/power/supply/qcom_smbx.c b/drivers/power/supply/qcom_smbx.c
> index d902f3f43548191d3d0310ce90e699918ed0f16f..b723dba5b86daefb238ee6aae19b1b7e5236fce3 100644
> --- a/drivers/power/supply/qcom_smbx.c
> +++ b/drivers/power/supply/qcom_smbx.c
> @@ -1091,8 +1091,14 @@ static int smb_probe(struct platform_device *pdev)
>  	if (rc < 0)
>  		return dev_err_probe(chip->dev, rc,
>  				     "Couldn't write fast charge current cfg");
>  
> +	rc = regmap_write_bits(chip->regmap, chip->base + AICL_RERUN_TIME_CFG,
> +			       AICL_RERUN_TIME_MASK, AIC_RERUN_TIME_3_SECS);

FWIW a random downstream clone I have sets 0x01 which is claimed to
mean "every 12s" instead

Konrad