linux-kernel - Re: [PATCH v3 2/2] soc: qcom: Add Qualcomm Ramp Controller driver

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Message-ID: <555fbc95-c002-7705-0639-9deb701ad513@linaro.org>
Date:   Wed, 16 Nov 2022 16:46:30 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, agross@...nel.org
Cc:     andersson@...nel.org, konrad.dybcio@...ainline.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, marijn.suijten@...ainline.org,
        kernel@...labora.com
Subject: Re: [PATCH v3 2/2] soc: qcom: Add Qualcomm Ramp Controller driver

On 15/11/2022 18:45, AngeloGioacchino Del Regno wrote:
> The Ramp Controller is used to program the sequence ID for pulse
> swallowing, enable sequence and linking sequence IDs for the CPU
> cores on some Qualcomm SoCs.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>   drivers/soc/qcom/Kconfig           |   9 +
>   drivers/soc/qcom/Makefile          |   1 +
>   drivers/soc/qcom/ramp_controller.c | 331 +++++++++++++++++++++++++++++
>   3 files changed, 341 insertions(+)
>   create mode 100644 drivers/soc/qcom/ramp_controller.c
> 

I'd allow myself to re-ask the same questions here:

Generic question. regarding this controller. If it is supposed to work
close to DVCS, etc. Does ramp controller need any programming when
changing speed and/or APC voltage?
Is it necessary to turn ramp on and off during the runtime?

-- 
With best wishes
Dmitry