Re: [PATCH 01/13] clk: tegra: Add binding for the Tegra124 DFLL clocksource

Tuomas Tynkkynen
2014-07-11T16:48:24Z

On 11/07/14 19:28, Andrew Bresticker wrote:
> On Thu, Jul 10, 2014 at 2:42 PM, Tuomas Tynkkynen <ttynkkynen-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> wrote:
>> The DFLL is the main clocksource for the fast CPU cluster on Tegra124
>> and also provides automatic CPU rail voltage scaling as well. The DFLL
>> is a separate IP block from the usual Tegra124 clock-and-reset
>> controller, so it gets its own node in the device tree.
>
>> diff --git a/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt b/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
>
>> +- nvidia,pmic-voltage-table: Array of 2-tuples. Each entry should have the
>> + form <register-value voltage-in-uV>, indicating the register value that
>> + needs to be programmed to the PMIC for changing the VDD_CPU voltage to
>> + the specified voltage. The table must be in ascending order by the voltage.
>
> Instead of listing the register values for each voltage in the DT,
> can't you use regulator_list_voltage() to create this map?
>

I don't see a way to get the register values that way, unless we assume
that the mapping is linear and doesn't have holes.

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