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Subject: Re: [PATCH 01/13] clk: tegra: Add binding for the Tegra124 DFLL clocksource
From: Andrew Bresticker <abrestic@chromium.org>
To: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Cc: "linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        Prashant Gaikwad <pgaikwad@nvidia.com>,
        Mike Turquette <mturquette@linaro.org>,
        Stephen Warren <swarren@wwwdotorg.org>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Peter De Schrijver <pdeschrijver@nvidia.com>,
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        Thierry Reding <thierry.reding@gmail.com>
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On Thu, Jul 10, 2014 at 2:42 PM, Tuomas Tynkkynen <ttynkkynen@nvidia.com> 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?
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