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

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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@xxxxxxxxxxxxx>
---
  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



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