fa63aa3dea
Tegra CVB tables encode the relationship between operating voltage and optimal frequency as a function of the so-called speedo value. The speedo value is written to the on-chip fuses at the factory, which allows the voltage-frequency operating points to be calculated on an per-chip basis. Add utility functions to parse the Tegra-specific tables and export the voltage-frequency pairs to the generic OPP framework for other drivers to use. Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com> Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi> Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com> Acked-by: Michael Turquette <mturquette@linaro.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
/*
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* Utility functions for parsing Tegra CVB voltage tables
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#ifndef __DRIVERS_CLK_TEGRA_CVB_H
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#define __DRIVERS_CLK_TEGRA_CVB_H
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#include <linux/types.h>
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struct device;
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#define MAX_DVFS_FREQS 40
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struct rail_alignment {
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int offset_uv;
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int step_uv;
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};
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struct cvb_coefficients {
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int c0;
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int c1;
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int c2;
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};
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struct cvb_table_freq_entry {
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unsigned long freq;
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struct cvb_coefficients coefficients;
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};
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struct cvb_cpu_dfll_data {
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u32 tune0_low;
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u32 tune0_high;
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u32 tune1;
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};
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struct cvb_table {
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int speedo_id;
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int process_id;
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int min_millivolts;
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int max_millivolts;
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struct rail_alignment alignment;
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int speedo_scale;
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int voltage_scale;
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struct cvb_table_freq_entry cvb_table[MAX_DVFS_FREQS];
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struct cvb_cpu_dfll_data cpu_dfll_data;
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};
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const struct cvb_table *tegra_cvb_build_opp_table(
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const struct cvb_table *cvb_tables,
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size_t sz, int process_id,
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int speedo_id, int speedo_value,
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unsigned long max_rate,
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struct device *opp_dev);
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#endif
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