1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2014-2016, NVIDIA CORPORATION.  All rights reserved.
25  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
27  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
37  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
38  * |-----------| SHFT_FT |       BASE_FT       |      BASE_CP      |
39  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
45  * |---------------------------------------------------| SHIFT_CP  |
46  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52  * div64_s64_precise() - wrapper for div64_s64()
84 	shared->base_cp = (val & tfuse->fuse_base_cp_mask) >>  in tegra_calc_shared_calib()
85 			  tfuse->fuse_base_cp_shift;  in tegra_calc_shared_calib()
86 	shared->base_ft = (val & tfuse->fuse_base_ft_mask) >>  in tegra_calc_shared_calib()
87 			  tfuse->fuse_base_ft_shift;  in tegra_calc_shared_calib()
89 	shifted_ft = (val & tfuse->fuse_shift_ft_mask) >>  in tegra_calc_shared_calib()
90 		     tfuse->fuse_shift_ft_shift;  in tegra_calc_shared_calib()
93 	if (tfuse->fuse_spare_realignment) {  in tegra_calc_shared_calib()
94 		err = tegra_fuse_readl(tfuse->fuse_spare_realignment, &val);  in tegra_calc_shared_calib()
101 	shared->actual_temp_cp = 2 * NOMINAL_CALIB_CP + shifted_cp;  in tegra_calc_shared_calib()
102 	shared->actual_temp_ft = 2 * NOMINAL_CALIB_FT + shifted_ft;  in tegra_calc_shared_calib()
107 int tegra_calc_tsensor_calib(const struct tegra_tsensor *sensor,  in tegra_calc_tsensor_calib()  argument
117 	s64 temp;  in tegra_calc_tsensor_calib()  local
120 	sensor_group = sensor->group;  in tegra_calc_tsensor_calib()
122 	err = tegra_fuse_readl(sensor->calib_fuse_offset, &val);  in tegra_calc_tsensor_calib()
126 	actual_tsensor_cp = (shared->base_cp * 64) + sign_extend32(val, 12);  in tegra_calc_tsensor_calib()
129 	actual_tsensor_ft = (shared->base_ft * 32) + sign_extend32(val, 12);  in tegra_calc_tsensor_calib()
131 	delta_sens = actual_tsensor_ft - actual_tsensor_cp;  in tegra_calc_tsensor_calib()
132 	delta_temp = shared->actual_temp_ft - shared->actual_temp_cp;  in tegra_calc_tsensor_calib()
134 	mult = sensor_group->pdiv * sensor->config->tsample_ate;  in tegra_calc_tsensor_calib()
135 	div = sensor->config->tsample * sensor_group->pdiv_ate;  in tegra_calc_tsensor_calib()
137 	temp = (s64)delta_temp * (1LL << 13) * mult;  in tegra_calc_tsensor_calib()
138 	therma = div64_s64_precise(temp, (s64)delta_sens * div);  in tegra_calc_tsensor_calib()
140 	temp = ((s64)actual_tsensor_ft * shared->actual_temp_cp) -  in tegra_calc_tsensor_calib()
141 		((s64)actual_tsensor_cp * shared->actual_temp_ft);  in tegra_calc_tsensor_calib()
142 	thermb = div64_s64_precise(temp, delta_sens);  in tegra_calc_tsensor_calib()
144 	temp = (s64)therma * sensor->fuse_corr_alpha;  in tegra_calc_tsensor_calib()
145 	therma = div64_s64_precise(temp, CALIB_COEFFICIENT);  in tegra_calc_tsensor_calib()
147 	temp = (s64)thermb * sensor->fuse_corr_alpha + sensor->fuse_corr_beta;  in tegra_calc_tsensor_calib()
148 	thermb = div64_s64_precise(temp, CALIB_COEFFICIENT);  in tegra_calc_tsensor_calib()