83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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/*
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* Copyright (c) 2014-2016, NVIDIA CORPORATION. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope 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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __TEGRA_PPM_H
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#define __TEGRA_PPM_H
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#include <linux/clk.h>
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#include <linux/fs.h>
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struct fv_relation;
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struct fv_relation *fv_relation_create(
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void *, int, ssize_t, unsigned int, unsigned int,
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int (*)(void *, unsigned long));
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void fv_relation_destroy(struct fv_relation *);
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#define TEGRA_PPM_MAX_CORES 4
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struct tegra_ppm_params {
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int n_cores;
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/* activity factor in nA/MHz (aka fF, femtofarads) */
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u32 dyn_consts_n[TEGRA_PPM_MAX_CORES];
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/* leakage scaling factor based on number of cores. Expressed permill */
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u32 leakage_consts_n[TEGRA_PPM_MAX_CORES];
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/* Coefficients to a tricubic model of leakage. Model inputs are:
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* Voltage in Volts
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* IDDQ in Amps
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* Temperature in *deciCelcius*
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*
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* This unusual choice of units helps with the accuracy of fixed point
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* calculations by keeping all of the coefficients near the same order
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* of magnitude.
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*
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* All of the coefficients are expressed as ijk_scaled times their true
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* value so that they fit nicely in 32-bit integers with minimal
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* quantization error.
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*/
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s32 leakage_consts_ijk[4][4][4];
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u32 ijk_scaled;
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/* minimum leakage current */
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u32 leakage_min;
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};
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struct tegra_ppm;
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struct tegra_ppm_params *of_read_tegra_ppm_params(struct device_node *np);
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struct tegra_ppm *tegra_ppm_create(const char *name,
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struct fv_relation *fv,
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struct tegra_ppm_params *params,
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int iddq_ma,
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struct dentry *debugfs_dir);
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void tegra_ppm_destroy(struct tegra_ppm *doomed,
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struct fv_relation **fv,
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struct tegra_ppm_params **params);
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#define TEGRA_PPM_UNITS_MILLIAMPS 0
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#define TEGRA_PPM_UNITS_MILLIWATTS 1
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unsigned tegra_ppm_get_maxf(struct tegra_ppm *ctx,
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unsigned int limit, int units,
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int temp_c, int cores);
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void tegra_ppm_drop_cache(struct tegra_ppm *ctx);
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#endif
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