From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, agross@kernel.org
Cc: andersson@kernel.org, konrad.dybcio@somainline.org,
robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, marijn.suijten@somainline.org,
kernel@collabora.com
Subject: Re: [PATCH v3 2/2] soc: qcom: Add Qualcomm Ramp Controller driver
Date: Thu, 17 Nov 2022 10:12:55 +0100 [thread overview]
Message-ID: <42d55695-9db0-b835-4837-8dae6e76046c@collabora.com> (raw)
In-Reply-To: <555fbc95-c002-7705-0639-9deb701ad513@linaro.org>
Il 16/11/22 14:46, Dmitry Baryshkov ha scritto:
> 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@collabora.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?
>
No, it's a set-and-forget type of programming. Turning that on/off during
runtime is self-managed and, after the initial setting that this driver,
no further action is required - or at least not from Linux.
Cheers!
Angelo
next prev parent reply other threads:[~2022-11-17 9:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-15 15:45 [PATCH v3 0/2] Qualcomm Ramp Controller and MSM8976 config AngeloGioacchino Del Regno
2022-11-15 15:45 ` [PATCH v3 1/2] dt-bindings: soc: qcom: Add bindings for Qualcomm Ramp Controller AngeloGioacchino Del Regno
2022-11-15 15:45 ` [PATCH v3 2/2] soc: qcom: Add Qualcomm Ramp Controller driver AngeloGioacchino Del Regno
2022-11-16 13:46 ` Dmitry Baryshkov
2022-11-17 9:12 ` AngeloGioacchino Del Regno [this message]
2022-11-17 11:59 ` Dmitry Baryshkov
2022-11-17 3:24 ` kernel test robot
2022-11-17 12:05 ` Dmitry Baryshkov
2022-11-17 13:25 ` AngeloGioacchino Del Regno
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