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media: qcom: camss: Add support for regulator init_load_uA in CSIPHY

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Some Qualcomm regulators are configured with initial mode as
HPM (High Power Mode), which may lead to higher power consumption.
To reduce power usage, it's preferable to set the initial mode
to LPM (Low Power Mode).

To ensure the regulator can switch from LPM to HPM when needed,
this patch adds current load configuration for CAMSS CSIPHY.
This allows the regulator framework to scale the mode dynamically
based on the load requirement.

The current default value for current is uninitialized or random.
To address this, initial current values are added for the
following platforms:
MSM8916, MSM8939, MSM8953, MSM8996, QCM2290, SDM670, SM8250, SC7280,
SM8550, SM8650, QCS8300, SA8775P and X1E80100.

For SDM660, SDM845, SC8280XP the value is set to 0,
indicating that no default current value is configured,
the other values are derived from the power grid.

Signed-off-by: Wenmeng Liu <wenmeng.liu@oss.qualcomm.com>
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Wenmeng Liu 2025-11-14 16:26:49 +08:00 • committed by Hans Verkuil
commit 17bc0e2882
4 changed files with 265 additions and 102 deletions
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