Re: [PATCH V4 09/14] cpufreq: mediatek: Refine mtk_cpufreq_voltage_tracking()

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Il 22/04/22 09:52, Rex-BC Chen ha scritto:
From: Jia-Wei Chang <jia-wei.chang@xxxxxxxxxxxx>

Because the difference of sram and proc should in a range of min_volt_shift
and max_volt_shift. We need to adjust the sram and proc step by step.

We replace VOLT_TOL (voltage tolerance) with the platform data and update the
logic to determine the voltage boundary and invoking regulator_set_voltage.

- Use 'sram_min_volt' and 'sram_max_volt' to determine the voltage boundary
   of sram regulator.
- Use (sram_min_volt - min_volt_shift) and 'proc_max_volt' to determine the
   voltage boundary of vproc regulator.

Moreover, to prevent infinite loop when tracking voltage, we calculate the
maximum value for each platform data.
We assume min voltage is 0 and tracking target voltage using
min_volt_shift for each iteration.
The retry_max is 3 times of expeted iteration count.

Signed-off-by: Jia-Wei Chang <jia-wei.chang@xxxxxxxxxxxx>
Signed-off-by: Rex-BC Chen <rex-bc.chen@xxxxxxxxxxxx>


Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>




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