David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015-2017, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 15 | |
| 16 | #include <linux/bitops.h> |
| 17 | #include <linux/debugfs.h> |
| 18 | #include <linux/err.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/io.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/list.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/of.h> |
| 26 | #include <linux/of_device.h> |
| 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/pm_opp.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/string.h> |
| 31 | #include <linux/uaccess.h> |
| 32 | #include <linux/regulator/driver.h> |
| 33 | #include <linux/regulator/machine.h> |
| 34 | #include <linux/regulator/of_regulator.h> |
| 35 | |
| 36 | #include "cpr3-regulator.h" |
| 37 | |
| 38 | #define MSM8953_APSS_FUSE_CORNERS 4 |
| 39 | |
| 40 | /** |
| 41 | * struct cpr4_msm8953_apss_fuses - APSS specific fuse data for MSM8953 |
| 42 | * @ro_sel: Ring oscillator select fuse parameter value for each |
| 43 | * fuse corner |
| 44 | * @init_voltage: Initial (i.e. open-loop) voltage fuse parameter value |
| 45 | * for each fuse corner (raw, not converted to a voltage) |
| 46 | * @target_quot: CPR target quotient fuse parameter value for each fuse |
| 47 | * corner |
| 48 | * @quot_offset: CPR target quotient offset fuse parameter value for each |
| 49 | * fuse corner (raw, not unpacked) used for target quotient |
| 50 | * interpolation |
| 51 | * @speed_bin: Application processor speed bin fuse parameter value for |
| 52 | * the given chip |
| 53 | * @cpr_fusing_rev: CPR fusing revision fuse parameter value |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 54 | * @foundry_id: Foundry identifier fuse parameter value for the given |
| 55 | * chip |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 56 | * @boost_cfg: CPR boost configuration fuse parameter value |
| 57 | * @boost_voltage: CPR boost voltage fuse parameter value (raw, not |
| 58 | * converted to a voltage) |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 59 | * @aging_init_quot_diff: Initial quotient difference between CPR aging |
| 60 | * min and max sensors measured at time of manufacturing |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 61 | * |
| 62 | * This struct holds the values for all of the fuses read from memory. |
| 63 | */ |
| 64 | struct cpr4_msm8953_apss_fuses { |
| 65 | u64 ro_sel[MSM8953_APSS_FUSE_CORNERS]; |
| 66 | u64 init_voltage[MSM8953_APSS_FUSE_CORNERS]; |
| 67 | u64 target_quot[MSM8953_APSS_FUSE_CORNERS]; |
| 68 | u64 quot_offset[MSM8953_APSS_FUSE_CORNERS]; |
| 69 | u64 speed_bin; |
| 70 | u64 cpr_fusing_rev; |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 71 | u64 foundry_id; |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 72 | u64 boost_cfg; |
| 73 | u64 boost_voltage; |
| 74 | u64 misc; |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 75 | u64 aging_init_quot_diff; |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 76 | }; |
| 77 | |
| 78 | /* |
| 79 | * fuse combo = fusing revision + 8 * (speed bin) |
| 80 | * where: fusing revision = 0 - 7 and speed bin = 0 - 7 |
| 81 | */ |
| 82 | #define CPR4_MSM8953_APSS_FUSE_COMBO_COUNT 64 |
| 83 | |
| 84 | /* |
| 85 | * Constants which define the name of each fuse corner. |
| 86 | */ |
| 87 | enum cpr4_msm8953_apss_fuse_corner { |
| 88 | CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS = 0, |
| 89 | CPR4_MSM8953_APSS_FUSE_CORNER_SVS = 1, |
| 90 | CPR4_MSM8953_APSS_FUSE_CORNER_NOM = 2, |
| 91 | CPR4_MSM8953_APSS_FUSE_CORNER_TURBO_L1 = 3, |
| 92 | }; |
| 93 | |
| 94 | static const char * const cpr4_msm8953_apss_fuse_corner_name[] = { |
| 95 | [CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS] = "LowSVS", |
| 96 | [CPR4_MSM8953_APSS_FUSE_CORNER_SVS] = "SVS", |
| 97 | [CPR4_MSM8953_APSS_FUSE_CORNER_NOM] = "NOM", |
| 98 | [CPR4_MSM8953_APSS_FUSE_CORNER_TURBO_L1] = "TURBO_L1", |
| 99 | }; |
| 100 | |
| 101 | /* |
| 102 | * MSM8953 APSS fuse parameter locations: |
| 103 | * |
| 104 | * Structs are organized with the following dimensions: |
| 105 | * Outer: 0 to 3 for fuse corners from lowest to highest corner |
| 106 | * Inner: large enough to hold the longest set of parameter segments which |
| 107 | * fully defines a fuse parameter, +1 (for NULL termination). |
| 108 | * Each segment corresponds to a contiguous group of bits from a |
| 109 | * single fuse row. These segments are concatentated together in |
| 110 | * order to form the full fuse parameter value. The segments for |
| 111 | * a given parameter may correspond to different fuse rows. |
| 112 | */ |
| 113 | static const struct cpr3_fuse_param |
| 114 | msm8953_apss_ro_sel_param[MSM8953_APSS_FUSE_CORNERS][2] = { |
| 115 | {{73, 12, 15}, {} }, |
| 116 | {{73, 8, 11}, {} }, |
| 117 | {{73, 4, 7}, {} }, |
| 118 | {{73, 0, 3}, {} }, |
| 119 | }; |
| 120 | |
| 121 | static const struct cpr3_fuse_param |
| 122 | msm8953_apss_init_voltage_param[MSM8953_APSS_FUSE_CORNERS][2] = { |
| 123 | {{71, 24, 29}, {} }, |
| 124 | {{71, 18, 23}, {} }, |
| 125 | {{71, 12, 17}, {} }, |
| 126 | {{71, 6, 11}, {} }, |
| 127 | }; |
| 128 | |
| 129 | static const struct cpr3_fuse_param |
| 130 | msm8953_apss_target_quot_param[MSM8953_APSS_FUSE_CORNERS][2] = { |
| 131 | {{72, 44, 55}, {} }, |
| 132 | {{72, 32, 43}, {} }, |
| 133 | {{72, 20, 31}, {} }, |
| 134 | {{72, 8, 19}, {} }, |
| 135 | }; |
| 136 | |
| 137 | static const struct cpr3_fuse_param |
| 138 | msm8953_apss_quot_offset_param[MSM8953_APSS_FUSE_CORNERS][2] = { |
| 139 | {{} }, |
| 140 | {{71, 46, 52}, {} }, |
| 141 | {{71, 39, 45}, {} }, |
| 142 | {{71, 32, 38}, {} }, |
| 143 | }; |
| 144 | |
| 145 | static const struct cpr3_fuse_param msm8953_cpr_fusing_rev_param[] = { |
| 146 | {71, 53, 55}, |
| 147 | {}, |
| 148 | }; |
| 149 | |
| 150 | static const struct cpr3_fuse_param msm8953_apss_speed_bin_param[] = { |
| 151 | {36, 40, 42}, |
| 152 | {}, |
| 153 | }; |
| 154 | |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 155 | static const struct cpr3_fuse_param msm8953_apss_foundry_id_param[] = { |
| 156 | {37, 40, 42}, |
| 157 | {}, |
| 158 | }; |
| 159 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 160 | static const struct cpr3_fuse_param msm8953_cpr_boost_fuse_cfg_param[] = { |
| 161 | {36, 43, 45}, |
| 162 | {}, |
| 163 | }; |
| 164 | |
| 165 | static const struct cpr3_fuse_param msm8953_apss_boost_fuse_volt_param[] = { |
| 166 | {71, 0, 5}, |
| 167 | {}, |
| 168 | }; |
| 169 | |
| 170 | static const struct cpr3_fuse_param msm8953_misc_fuse_volt_adj_param[] = { |
| 171 | {36, 54, 54}, |
| 172 | {}, |
| 173 | }; |
| 174 | |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 175 | static const struct cpr3_fuse_param msm8953_apss_aging_init_quot_diff_param[] |
| 176 | = { |
| 177 | {72, 0, 7}, |
| 178 | {}, |
| 179 | }; |
| 180 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 181 | /* |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 182 | * The maximum number of fuse combinations possible for the selected fuse |
| 183 | * parameters in fuse combo map logic. |
| 184 | * Here, possible speed-bin values = 8, fuse revision values = 8, and foundry |
| 185 | * identifier values = 8. Total number of combinations = 512 (i.e., 8 * 8 * 8) |
| 186 | */ |
| 187 | #define CPR4_MSM8953_APSS_FUSE_COMBO_MAP_MAX_COUNT 512 |
| 188 | |
| 189 | |
| 190 | /* |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 191 | * The number of possible values for misc fuse is |
| 192 | * 2^(#bits defined for misc fuse) |
| 193 | */ |
| 194 | #define MSM8953_MISC_FUSE_VAL_COUNT BIT(1) |
| 195 | |
| 196 | /* |
| 197 | * Open loop voltage fuse reference voltages in microvolts for MSM8953 |
| 198 | */ |
| 199 | static const int msm8953_apss_fuse_ref_volt |
| 200 | [MSM8953_APSS_FUSE_CORNERS] = { |
| 201 | 645000, |
| 202 | 720000, |
| 203 | 865000, |
| 204 | 1065000, |
| 205 | }; |
| 206 | |
| 207 | #define MSM8953_APSS_FUSE_STEP_VOLT 10000 |
| 208 | #define MSM8953_APSS_VOLTAGE_FUSE_SIZE 6 |
| 209 | #define MSM8953_APSS_QUOT_OFFSET_SCALE 5 |
| 210 | |
| 211 | #define MSM8953_APSS_CPR_SENSOR_COUNT 13 |
| 212 | |
| 213 | #define MSM8953_APSS_CPR_CLOCK_RATE 19200000 |
| 214 | |
| 215 | #define MSM8953_APSS_MAX_TEMP_POINTS 3 |
| 216 | #define MSM8953_APSS_TEMP_SENSOR_ID_START 4 |
| 217 | #define MSM8953_APSS_TEMP_SENSOR_ID_END 13 |
| 218 | /* |
| 219 | * Boost voltage fuse reference and ceiling voltages in microvolts for |
| 220 | * MSM8953. |
| 221 | */ |
| 222 | #define MSM8953_APSS_BOOST_FUSE_REF_VOLT 1140000 |
| 223 | #define MSM8953_APSS_BOOST_CEILING_VOLT 1140000 |
| 224 | #define MSM8953_APSS_BOOST_FLOOR_VOLT 900000 |
| 225 | #define MAX_BOOST_CONFIG_FUSE_VALUE 8 |
| 226 | |
| 227 | #define MSM8953_APSS_CPR_SDELTA_CORE_COUNT 15 |
| 228 | |
| 229 | /* |
| 230 | * Array of integer values mapped to each of the boost config fuse values to |
| 231 | * indicate boost enable/disable status. |
| 232 | */ |
| 233 | static bool boost_fuse[MAX_BOOST_CONFIG_FUSE_VALUE] = {0, 1, 1, 1, 1, 1, 1, 1}; |
| 234 | |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 235 | /* CPR Aging parameters for msm8953 */ |
| 236 | #define MSM8953_APSS_AGING_INIT_QUOT_DIFF_SCALE 1 |
| 237 | #define MSM8953_APSS_AGING_INIT_QUOT_DIFF_SIZE 8 |
| 238 | #define MSM8953_APSS_AGING_SENSOR_ID 6 |
| 239 | |
| 240 | /* Use a very high value for max aging margin to be applied */ |
| 241 | #define MSM8953_APSS_AGING_MAX_AGE_MARGIN_QUOT (-1000) |
| 242 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 243 | /** |
| 244 | * cpr4_msm8953_apss_read_fuse_data() - load APSS specific fuse parameter values |
| 245 | * @vreg: Pointer to the CPR3 regulator |
| 246 | * |
| 247 | * This function allocates a cpr4_msm8953_apss_fuses struct, fills it with |
| 248 | * values read out of hardware fuses, and finally copies common fuse values |
| 249 | * into the CPR3 regulator struct. |
| 250 | * |
| 251 | * Return: 0 on success, errno on failure |
| 252 | */ |
| 253 | static int cpr4_msm8953_apss_read_fuse_data(struct cpr3_regulator *vreg) |
| 254 | { |
| 255 | void __iomem *base = vreg->thread->ctrl->fuse_base; |
| 256 | struct cpr4_msm8953_apss_fuses *fuse; |
| 257 | int i, rc; |
| 258 | |
| 259 | fuse = devm_kzalloc(vreg->thread->ctrl->dev, sizeof(*fuse), GFP_KERNEL); |
| 260 | if (!fuse) |
| 261 | return -ENOMEM; |
| 262 | |
| 263 | rc = cpr3_read_fuse_param(base, msm8953_apss_speed_bin_param, |
| 264 | &fuse->speed_bin); |
| 265 | if (rc) { |
| 266 | cpr3_err(vreg, "Unable to read speed bin fuse, rc=%d\n", rc); |
| 267 | return rc; |
| 268 | } |
| 269 | cpr3_info(vreg, "speed bin = %llu\n", fuse->speed_bin); |
| 270 | |
| 271 | rc = cpr3_read_fuse_param(base, msm8953_cpr_fusing_rev_param, |
| 272 | &fuse->cpr_fusing_rev); |
| 273 | if (rc) { |
| 274 | cpr3_err(vreg, "Unable to read CPR fusing revision fuse, rc=%d\n", |
| 275 | rc); |
| 276 | return rc; |
| 277 | } |
| 278 | cpr3_info(vreg, "CPR fusing revision = %llu\n", fuse->cpr_fusing_rev); |
| 279 | |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 280 | rc = cpr3_read_fuse_param(base, msm8953_apss_foundry_id_param, |
| 281 | &fuse->foundry_id); |
| 282 | if (rc) { |
| 283 | cpr3_err(vreg, "Unable to read foundry id fuse, rc=%d\n", rc); |
| 284 | return rc; |
| 285 | } |
| 286 | cpr3_info(vreg, "foundry id = %llu\n", fuse->foundry_id); |
| 287 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 288 | rc = cpr3_read_fuse_param(base, msm8953_misc_fuse_volt_adj_param, |
| 289 | &fuse->misc); |
| 290 | if (rc) { |
| 291 | cpr3_err(vreg, "Unable to read misc voltage adjustment fuse, rc=%d\n", |
| 292 | rc); |
| 293 | return rc; |
| 294 | } |
| 295 | cpr3_info(vreg, "CPR misc fuse value = %llu\n", fuse->misc); |
| 296 | if (fuse->misc >= MSM8953_MISC_FUSE_VAL_COUNT) { |
| 297 | cpr3_err(vreg, "CPR misc fuse value = %llu, should be < %lu\n", |
| 298 | fuse->misc, MSM8953_MISC_FUSE_VAL_COUNT); |
| 299 | return -EINVAL; |
| 300 | } |
| 301 | |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 302 | rc = cpr3_read_fuse_param(base, msm8953_apss_aging_init_quot_diff_param, |
| 303 | &fuse->aging_init_quot_diff); |
| 304 | if (rc) { |
| 305 | cpr3_err(vreg, "Unable to read aging initial quotient difference fuse, rc=%d\n", |
| 306 | rc); |
| 307 | return rc; |
| 308 | } |
| 309 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 310 | for (i = 0; i < MSM8953_APSS_FUSE_CORNERS; i++) { |
| 311 | rc = cpr3_read_fuse_param(base, |
| 312 | msm8953_apss_init_voltage_param[i], |
| 313 | &fuse->init_voltage[i]); |
| 314 | if (rc) { |
| 315 | cpr3_err(vreg, "Unable to read fuse-corner %d initial voltage fuse, rc=%d\n", |
| 316 | i, rc); |
| 317 | return rc; |
| 318 | } |
| 319 | |
| 320 | rc = cpr3_read_fuse_param(base, |
| 321 | msm8953_apss_target_quot_param[i], |
| 322 | &fuse->target_quot[i]); |
| 323 | if (rc) { |
| 324 | cpr3_err(vreg, "Unable to read fuse-corner %d target quotient fuse, rc=%d\n", |
| 325 | i, rc); |
| 326 | return rc; |
| 327 | } |
| 328 | |
| 329 | rc = cpr3_read_fuse_param(base, |
| 330 | msm8953_apss_ro_sel_param[i], |
| 331 | &fuse->ro_sel[i]); |
| 332 | if (rc) { |
| 333 | cpr3_err(vreg, "Unable to read fuse-corner %d RO select fuse, rc=%d\n", |
| 334 | i, rc); |
| 335 | return rc; |
| 336 | } |
| 337 | |
| 338 | rc = cpr3_read_fuse_param(base, |
| 339 | msm8953_apss_quot_offset_param[i], |
| 340 | &fuse->quot_offset[i]); |
| 341 | if (rc) { |
| 342 | cpr3_err(vreg, "Unable to read fuse-corner %d quotient offset fuse, rc=%d\n", |
| 343 | i, rc); |
| 344 | return rc; |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | rc = cpr3_read_fuse_param(base, msm8953_cpr_boost_fuse_cfg_param, |
| 349 | &fuse->boost_cfg); |
| 350 | if (rc) { |
| 351 | cpr3_err(vreg, "Unable to read CPR boost config fuse, rc=%d\n", |
| 352 | rc); |
| 353 | return rc; |
| 354 | } |
| 355 | cpr3_info(vreg, "Voltage boost fuse config = %llu boost = %s\n", |
| 356 | fuse->boost_cfg, boost_fuse[fuse->boost_cfg] |
| 357 | ? "enable" : "disable"); |
| 358 | |
| 359 | rc = cpr3_read_fuse_param(base, |
| 360 | msm8953_apss_boost_fuse_volt_param, |
| 361 | &fuse->boost_voltage); |
| 362 | if (rc) { |
| 363 | cpr3_err(vreg, "failed to read boost fuse voltage, rc=%d\n", |
| 364 | rc); |
| 365 | return rc; |
| 366 | } |
| 367 | |
| 368 | vreg->fuse_combo = fuse->cpr_fusing_rev + 8 * fuse->speed_bin; |
| 369 | if (vreg->fuse_combo >= CPR4_MSM8953_APSS_FUSE_COMBO_COUNT) { |
| 370 | cpr3_err(vreg, "invalid CPR fuse combo = %d found\n", |
| 371 | vreg->fuse_combo); |
| 372 | return -EINVAL; |
| 373 | } |
| 374 | |
| 375 | vreg->speed_bin_fuse = fuse->speed_bin; |
| 376 | vreg->cpr_rev_fuse = fuse->cpr_fusing_rev; |
| 377 | vreg->fuse_corner_count = MSM8953_APSS_FUSE_CORNERS; |
| 378 | vreg->platform_fuses = fuse; |
| 379 | |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * cpr4_apss_parse_corner_data() - parse APSS corner data from device tree |
| 385 | * properties of the CPR3 regulator's device node |
| 386 | * @vreg: Pointer to the CPR3 regulator |
| 387 | * |
| 388 | * Return: 0 on success, errno on failure |
| 389 | */ |
| 390 | static int cpr4_apss_parse_corner_data(struct cpr3_regulator *vreg) |
| 391 | { |
| 392 | int rc; |
| 393 | |
| 394 | rc = cpr3_parse_common_corner_data(vreg); |
| 395 | if (rc) { |
| 396 | cpr3_err(vreg, "error reading corner data, rc=%d\n", rc); |
| 397 | return rc; |
| 398 | } |
| 399 | |
| 400 | return rc; |
| 401 | } |
| 402 | |
| 403 | /** |
| 404 | * cpr4_apss_parse_misc_fuse_voltage_adjustments() - fill an array from a |
| 405 | * portion of the voltage adjustments specified based on |
| 406 | * miscellaneous fuse bits. |
| 407 | * @vreg: Pointer to the CPR3 regulator |
| 408 | * @volt_adjust: Voltage adjustment output data array which must be |
| 409 | * of size vreg->corner_count |
| 410 | * |
| 411 | * cpr3_parse_common_corner_data() must be called for vreg before this function |
| 412 | * is called so that speed bin size elements are initialized. |
| 413 | * |
| 414 | * Two formats are supported for the device tree property: |
| 415 | * 1. Length == tuple_list_size * vreg->corner_count |
| 416 | * (reading begins at index 0) |
| 417 | * 2. Length == tuple_list_size * vreg->speed_bin_corner_sum |
| 418 | * (reading begins at index tuple_list_size * vreg->speed_bin_offset) |
| 419 | * |
| 420 | * Here, tuple_list_size is the number of possible values for misc fuse. |
| 421 | * All other property lengths are treated as errors. |
| 422 | * |
| 423 | * Return: 0 on success, errno on failure |
| 424 | */ |
| 425 | static int cpr4_apss_parse_misc_fuse_voltage_adjustments( |
| 426 | struct cpr3_regulator *vreg, u32 *volt_adjust) |
| 427 | { |
| 428 | struct device_node *node = vreg->of_node; |
| 429 | struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; |
| 430 | int tuple_list_size = MSM8953_MISC_FUSE_VAL_COUNT; |
| 431 | int i, offset, rc, len = 0; |
| 432 | const char *prop_name = "qcom,cpr-misc-fuse-voltage-adjustment"; |
| 433 | |
| 434 | if (!of_find_property(node, prop_name, &len)) { |
| 435 | cpr3_err(vreg, "property %s is missing\n", prop_name); |
| 436 | return -EINVAL; |
| 437 | } |
| 438 | |
| 439 | if (len == tuple_list_size * vreg->corner_count * sizeof(u32)) { |
| 440 | offset = 0; |
| 441 | } else if (vreg->speed_bin_corner_sum > 0 && |
| 442 | len == tuple_list_size * vreg->speed_bin_corner_sum |
| 443 | * sizeof(u32)) { |
| 444 | offset = tuple_list_size * vreg->speed_bin_offset |
| 445 | + fuse->misc * vreg->corner_count; |
| 446 | } else { |
| 447 | if (vreg->speed_bin_corner_sum > 0) |
| 448 | cpr3_err(vreg, "property %s has invalid length=%d, should be %zu or %zu\n", |
| 449 | prop_name, len, |
| 450 | tuple_list_size * vreg->corner_count |
| 451 | * sizeof(u32), |
| 452 | tuple_list_size * vreg->speed_bin_corner_sum |
| 453 | * sizeof(u32)); |
| 454 | else |
| 455 | cpr3_err(vreg, "property %s has invalid length=%d, should be %zu\n", |
| 456 | prop_name, len, |
| 457 | tuple_list_size * vreg->corner_count |
| 458 | * sizeof(u32)); |
| 459 | return -EINVAL; |
| 460 | } |
| 461 | |
| 462 | for (i = 0; i < vreg->corner_count; i++) { |
| 463 | rc = of_property_read_u32_index(node, prop_name, offset + i, |
| 464 | &volt_adjust[i]); |
| 465 | if (rc) { |
| 466 | cpr3_err(vreg, "error reading property %s, rc=%d\n", |
| 467 | prop_name, rc); |
| 468 | return rc; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | /** |
| 476 | * cpr4_msm8953_apss_calculate_open_loop_voltages() - calculate the open-loop |
| 477 | * voltage for each corner of a CPR3 regulator |
| 478 | * @vreg: Pointer to the CPR3 regulator |
| 479 | * |
| 480 | * If open-loop voltage interpolation is allowed in device tree, then |
| 481 | * this function calculates the open-loop voltage for a given corner using |
| 482 | * linear interpolation. This interpolation is performed using the processor |
| 483 | * frequencies of the lower and higher Fmax corners along with their fused |
| 484 | * open-loop voltages. |
| 485 | * |
| 486 | * If open-loop voltage interpolation is not allowed, then this function uses |
| 487 | * the Fmax fused open-loop voltage for all of the corners associated with a |
| 488 | * given fuse corner. |
| 489 | * |
| 490 | * Return: 0 on success, errno on failure |
| 491 | */ |
| 492 | static int cpr4_msm8953_apss_calculate_open_loop_voltages( |
| 493 | struct cpr3_regulator *vreg) |
| 494 | { |
| 495 | struct device_node *node = vreg->of_node; |
| 496 | struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; |
| 497 | int i, j, rc = 0; |
| 498 | bool allow_interpolation; |
| 499 | u64 freq_low, volt_low, freq_high, volt_high; |
| 500 | int *fuse_volt, *misc_adj_volt; |
| 501 | int *fmax_corner; |
| 502 | |
| 503 | fuse_volt = kcalloc(vreg->fuse_corner_count, sizeof(*fuse_volt), |
| 504 | GFP_KERNEL); |
| 505 | fmax_corner = kcalloc(vreg->fuse_corner_count, sizeof(*fmax_corner), |
| 506 | GFP_KERNEL); |
| 507 | if (!fuse_volt || !fmax_corner) { |
| 508 | rc = -ENOMEM; |
| 509 | goto done; |
| 510 | } |
| 511 | |
| 512 | for (i = 0; i < vreg->fuse_corner_count; i++) { |
| 513 | fuse_volt[i] = cpr3_convert_open_loop_voltage_fuse( |
| 514 | msm8953_apss_fuse_ref_volt[i], |
| 515 | MSM8953_APSS_FUSE_STEP_VOLT, fuse->init_voltage[i], |
| 516 | MSM8953_APSS_VOLTAGE_FUSE_SIZE); |
| 517 | |
| 518 | /* Log fused open-loop voltage values for debugging purposes. */ |
| 519 | cpr3_info(vreg, "fused %8s: open-loop=%7d uV\n", |
| 520 | cpr4_msm8953_apss_fuse_corner_name[i], |
| 521 | fuse_volt[i]); |
| 522 | } |
| 523 | |
| 524 | rc = cpr3_adjust_fused_open_loop_voltages(vreg, fuse_volt); |
| 525 | if (rc) { |
| 526 | cpr3_err(vreg, "fused open-loop voltage adjustment failed, rc=%d\n", |
| 527 | rc); |
| 528 | goto done; |
| 529 | } |
| 530 | |
| 531 | allow_interpolation = of_property_read_bool(node, |
| 532 | "qcom,allow-voltage-interpolation"); |
| 533 | |
| 534 | for (i = 1; i < vreg->fuse_corner_count; i++) { |
| 535 | if (fuse_volt[i] < fuse_volt[i - 1]) { |
| 536 | cpr3_info(vreg, "fuse corner %d voltage=%d uV < fuse corner %d voltage=%d uV; overriding: fuse corner %d voltage=%d\n", |
| 537 | i, fuse_volt[i], i - 1, fuse_volt[i - 1], |
| 538 | i, fuse_volt[i - 1]); |
| 539 | fuse_volt[i] = fuse_volt[i - 1]; |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | if (!allow_interpolation) { |
| 544 | /* Use fused open-loop voltage for lower frequencies. */ |
| 545 | for (i = 0; i < vreg->corner_count; i++) |
| 546 | vreg->corner[i].open_loop_volt |
| 547 | = fuse_volt[vreg->corner[i].cpr_fuse_corner]; |
| 548 | goto done; |
| 549 | } |
| 550 | |
| 551 | /* Determine highest corner mapped to each fuse corner */ |
| 552 | j = vreg->fuse_corner_count - 1; |
| 553 | for (i = vreg->corner_count - 1; i >= 0; i--) { |
| 554 | if (vreg->corner[i].cpr_fuse_corner == j) { |
| 555 | fmax_corner[j] = i; |
| 556 | j--; |
| 557 | } |
| 558 | } |
| 559 | if (j >= 0) { |
| 560 | cpr3_err(vreg, "invalid fuse corner mapping\n"); |
| 561 | rc = -EINVAL; |
| 562 | goto done; |
| 563 | } |
| 564 | |
| 565 | /* |
| 566 | * Interpolation is not possible for corners mapped to the lowest fuse |
| 567 | * corner so use the fuse corner value directly. |
| 568 | */ |
| 569 | for (i = 0; i <= fmax_corner[0]; i++) |
| 570 | vreg->corner[i].open_loop_volt = fuse_volt[0]; |
| 571 | |
| 572 | /* Interpolate voltages for the higher fuse corners. */ |
| 573 | for (i = 1; i < vreg->fuse_corner_count; i++) { |
| 574 | freq_low = vreg->corner[fmax_corner[i - 1]].proc_freq; |
| 575 | volt_low = fuse_volt[i - 1]; |
| 576 | freq_high = vreg->corner[fmax_corner[i]].proc_freq; |
| 577 | volt_high = fuse_volt[i]; |
| 578 | |
| 579 | for (j = fmax_corner[i - 1] + 1; j <= fmax_corner[i]; j++) |
| 580 | vreg->corner[j].open_loop_volt = cpr3_interpolate( |
| 581 | freq_low, volt_low, freq_high, volt_high, |
| 582 | vreg->corner[j].proc_freq); |
| 583 | } |
| 584 | |
| 585 | done: |
| 586 | if (rc == 0) { |
| 587 | cpr3_debug(vreg, "unadjusted per-corner open-loop voltages:\n"); |
| 588 | for (i = 0; i < vreg->corner_count; i++) |
| 589 | cpr3_debug(vreg, "open-loop[%2d] = %d uV\n", i, |
| 590 | vreg->corner[i].open_loop_volt); |
| 591 | |
| 592 | rc = cpr3_adjust_open_loop_voltages(vreg); |
| 593 | if (rc) |
| 594 | cpr3_err(vreg, "open-loop voltage adjustment failed, rc=%d\n", |
| 595 | rc); |
| 596 | |
| 597 | if (of_find_property(node, |
| 598 | "qcom,cpr-misc-fuse-voltage-adjustment", |
| 599 | NULL)) { |
| 600 | misc_adj_volt = kcalloc(vreg->corner_count, |
| 601 | sizeof(*misc_adj_volt), GFP_KERNEL); |
| 602 | if (!misc_adj_volt) { |
| 603 | rc = -ENOMEM; |
| 604 | goto _exit; |
| 605 | } |
| 606 | |
| 607 | rc = cpr4_apss_parse_misc_fuse_voltage_adjustments(vreg, |
| 608 | misc_adj_volt); |
| 609 | if (rc) { |
| 610 | cpr3_err(vreg, "qcom,cpr-misc-fuse-voltage-adjustment reading failed, rc=%d\n", |
| 611 | rc); |
| 612 | kfree(misc_adj_volt); |
| 613 | goto _exit; |
| 614 | } |
| 615 | |
| 616 | for (i = 0; i < vreg->corner_count; i++) |
| 617 | vreg->corner[i].open_loop_volt |
| 618 | += misc_adj_volt[i]; |
| 619 | kfree(misc_adj_volt); |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | _exit: |
| 624 | kfree(fuse_volt); |
| 625 | kfree(fmax_corner); |
| 626 | return rc; |
| 627 | } |
| 628 | |
| 629 | /** |
| 630 | * cpr4_msm8953_apss_set_no_interpolation_quotients() - use the fused target |
| 631 | * quotient values for lower frequencies. |
| 632 | * @vreg: Pointer to the CPR3 regulator |
| 633 | * @volt_adjust: Pointer to array of per-corner closed-loop adjustment |
| 634 | * voltages |
| 635 | * @volt_adjust_fuse: Pointer to array of per-fuse-corner closed-loop |
| 636 | * adjustment voltages |
| 637 | * @ro_scale: Pointer to array of per-fuse-corner RO scaling factor |
| 638 | * values with units of QUOT/V |
| 639 | * |
| 640 | * Return: 0 on success, errno on failure |
| 641 | */ |
| 642 | static int cpr4_msm8953_apss_set_no_interpolation_quotients( |
| 643 | struct cpr3_regulator *vreg, int *volt_adjust, |
| 644 | int *volt_adjust_fuse, int *ro_scale) |
| 645 | { |
| 646 | struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; |
| 647 | u32 quot, ro; |
| 648 | int quot_adjust; |
| 649 | int i, fuse_corner; |
| 650 | |
| 651 | for (i = 0; i < vreg->corner_count; i++) { |
| 652 | fuse_corner = vreg->corner[i].cpr_fuse_corner; |
| 653 | quot = fuse->target_quot[fuse_corner]; |
| 654 | quot_adjust = cpr3_quot_adjustment(ro_scale[fuse_corner], |
| 655 | volt_adjust_fuse[fuse_corner] + |
| 656 | volt_adjust[i]); |
| 657 | ro = fuse->ro_sel[fuse_corner]; |
| 658 | vreg->corner[i].target_quot[ro] = quot + quot_adjust; |
| 659 | cpr3_debug(vreg, "corner=%d RO=%u target quot=%u\n", |
| 660 | i, ro, quot); |
| 661 | |
| 662 | if (quot_adjust) |
| 663 | cpr3_debug(vreg, "adjusted corner %d RO%u target quot: %u --> %u (%d uV)\n", |
| 664 | i, ro, quot, vreg->corner[i].target_quot[ro], |
| 665 | volt_adjust_fuse[fuse_corner] + |
| 666 | volt_adjust[i]); |
| 667 | } |
| 668 | |
| 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | /** |
| 673 | * cpr4_msm8953_apss_calculate_target_quotients() - calculate the CPR target |
| 674 | * quotient for each corner of a CPR3 regulator |
| 675 | * @vreg: Pointer to the CPR3 regulator |
| 676 | * |
| 677 | * If target quotient interpolation is allowed in device tree, then this |
| 678 | * function calculates the target quotient for a given corner using linear |
| 679 | * interpolation. This interpolation is performed using the processor |
| 680 | * frequencies of the lower and higher Fmax corners along with the fused |
| 681 | * target quotient and quotient offset of the higher Fmax corner. |
| 682 | * |
| 683 | * If target quotient interpolation is not allowed, then this function uses |
| 684 | * the Fmax fused target quotient for all of the corners associated with a |
| 685 | * given fuse corner. |
| 686 | * |
| 687 | * Return: 0 on success, errno on failure |
| 688 | */ |
| 689 | static int cpr4_msm8953_apss_calculate_target_quotients( |
| 690 | struct cpr3_regulator *vreg) |
| 691 | { |
| 692 | struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; |
| 693 | int rc; |
| 694 | bool allow_interpolation; |
| 695 | u64 freq_low, freq_high, prev_quot; |
| 696 | u64 *quot_low; |
| 697 | u64 *quot_high; |
| 698 | u32 quot, ro; |
| 699 | int i, j, fuse_corner, quot_adjust; |
| 700 | int *fmax_corner; |
| 701 | int *volt_adjust, *volt_adjust_fuse, *ro_scale; |
| 702 | int *voltage_adj_misc; |
| 703 | |
| 704 | /* Log fused quotient values for debugging purposes. */ |
| 705 | cpr3_info(vreg, "fused LowSVS: quot[%2llu]=%4llu\n", |
| 706 | fuse->ro_sel[CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS], |
| 707 | fuse->target_quot[CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS]); |
| 708 | for (i = CPR4_MSM8953_APSS_FUSE_CORNER_SVS; |
| 709 | i <= CPR4_MSM8953_APSS_FUSE_CORNER_TURBO_L1; i++) |
| 710 | cpr3_info(vreg, "fused %8s: quot[%2llu]=%4llu, quot_offset[%2llu]=%4llu\n", |
| 711 | cpr4_msm8953_apss_fuse_corner_name[i], |
| 712 | fuse->ro_sel[i], fuse->target_quot[i], |
| 713 | fuse->ro_sel[i], fuse->quot_offset[i] * |
| 714 | MSM8953_APSS_QUOT_OFFSET_SCALE); |
| 715 | |
| 716 | allow_interpolation = of_property_read_bool(vreg->of_node, |
| 717 | "qcom,allow-quotient-interpolation"); |
| 718 | |
| 719 | volt_adjust = kcalloc(vreg->corner_count, sizeof(*volt_adjust), |
| 720 | GFP_KERNEL); |
| 721 | volt_adjust_fuse = kcalloc(vreg->fuse_corner_count, |
| 722 | sizeof(*volt_adjust_fuse), GFP_KERNEL); |
| 723 | ro_scale = kcalloc(vreg->fuse_corner_count, sizeof(*ro_scale), |
| 724 | GFP_KERNEL); |
| 725 | fmax_corner = kcalloc(vreg->fuse_corner_count, sizeof(*fmax_corner), |
| 726 | GFP_KERNEL); |
| 727 | quot_low = kcalloc(vreg->fuse_corner_count, sizeof(*quot_low), |
| 728 | GFP_KERNEL); |
| 729 | quot_high = kcalloc(vreg->fuse_corner_count, sizeof(*quot_high), |
| 730 | GFP_KERNEL); |
| 731 | if (!volt_adjust || !volt_adjust_fuse || !ro_scale || |
| 732 | !fmax_corner || !quot_low || !quot_high) { |
| 733 | rc = -ENOMEM; |
| 734 | goto done; |
| 735 | } |
| 736 | |
| 737 | rc = cpr3_parse_closed_loop_voltage_adjustments(vreg, &fuse->ro_sel[0], |
| 738 | volt_adjust, volt_adjust_fuse, ro_scale); |
| 739 | if (rc) { |
| 740 | cpr3_err(vreg, "could not load closed-loop voltage adjustments, rc=%d\n", |
| 741 | rc); |
| 742 | goto done; |
| 743 | } |
| 744 | |
| 745 | if (of_find_property(vreg->of_node, |
| 746 | "qcom,cpr-misc-fuse-voltage-adjustment", NULL)) { |
| 747 | voltage_adj_misc = kcalloc(vreg->corner_count, |
| 748 | sizeof(*voltage_adj_misc), GFP_KERNEL); |
| 749 | if (!voltage_adj_misc) { |
| 750 | rc = -ENOMEM; |
| 751 | goto done; |
| 752 | } |
| 753 | |
| 754 | rc = cpr4_apss_parse_misc_fuse_voltage_adjustments(vreg, |
| 755 | voltage_adj_misc); |
| 756 | if (rc) { |
| 757 | cpr3_err(vreg, "qcom,cpr-misc-fuse-voltage-adjustment reading failed, rc=%d\n", |
| 758 | rc); |
| 759 | kfree(voltage_adj_misc); |
| 760 | goto done; |
| 761 | } |
| 762 | |
| 763 | for (i = 0; i < vreg->corner_count; i++) |
| 764 | volt_adjust[i] += voltage_adj_misc[i]; |
| 765 | |
| 766 | kfree(voltage_adj_misc); |
| 767 | } |
| 768 | |
| 769 | if (!allow_interpolation) { |
| 770 | /* Use fused target quotients for lower frequencies. */ |
| 771 | return cpr4_msm8953_apss_set_no_interpolation_quotients( |
| 772 | vreg, volt_adjust, volt_adjust_fuse, ro_scale); |
| 773 | } |
| 774 | |
| 775 | /* Determine highest corner mapped to each fuse corner */ |
| 776 | j = vreg->fuse_corner_count - 1; |
| 777 | for (i = vreg->corner_count - 1; i >= 0; i--) { |
| 778 | if (vreg->corner[i].cpr_fuse_corner == j) { |
| 779 | fmax_corner[j] = i; |
| 780 | j--; |
| 781 | } |
| 782 | } |
| 783 | if (j >= 0) { |
| 784 | cpr3_err(vreg, "invalid fuse corner mapping\n"); |
| 785 | rc = -EINVAL; |
| 786 | goto done; |
| 787 | } |
| 788 | |
| 789 | /* |
| 790 | * Interpolation is not possible for corners mapped to the lowest fuse |
| 791 | * corner so use the fuse corner value directly. |
| 792 | */ |
| 793 | i = CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS; |
| 794 | quot_adjust = cpr3_quot_adjustment(ro_scale[i], volt_adjust_fuse[i]); |
| 795 | quot = fuse->target_quot[i] + quot_adjust; |
| 796 | quot_high[i] = quot_low[i] = quot; |
| 797 | ro = fuse->ro_sel[i]; |
| 798 | if (quot_adjust) |
| 799 | cpr3_debug(vreg, "adjusted fuse corner %d RO%u target quot: %llu --> %u (%d uV)\n", |
| 800 | i, ro, fuse->target_quot[i], quot, volt_adjust_fuse[i]); |
| 801 | |
| 802 | for (i = 0; i <= fmax_corner[CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS]; |
| 803 | i++) |
| 804 | vreg->corner[i].target_quot[ro] = quot; |
| 805 | |
| 806 | for (i = CPR4_MSM8953_APSS_FUSE_CORNER_SVS; |
| 807 | i < vreg->fuse_corner_count; i++) { |
| 808 | quot_high[i] = fuse->target_quot[i]; |
| 809 | if (fuse->ro_sel[i] == fuse->ro_sel[i - 1]) |
| 810 | quot_low[i] = quot_high[i - 1]; |
| 811 | else |
| 812 | quot_low[i] = quot_high[i] |
| 813 | - fuse->quot_offset[i] |
| 814 | * MSM8953_APSS_QUOT_OFFSET_SCALE; |
| 815 | if (quot_high[i] < quot_low[i]) { |
| 816 | cpr3_debug(vreg, "quot_high[%d]=%llu < quot_low[%d]=%llu; overriding: quot_high[%d]=%llu\n", |
| 817 | i, quot_high[i], i, quot_low[i], |
| 818 | i, quot_low[i]); |
| 819 | quot_high[i] = quot_low[i]; |
| 820 | } |
| 821 | } |
| 822 | |
| 823 | /* Perform per-fuse-corner target quotient adjustment */ |
| 824 | for (i = 1; i < vreg->fuse_corner_count; i++) { |
| 825 | quot_adjust = cpr3_quot_adjustment(ro_scale[i], |
| 826 | volt_adjust_fuse[i]); |
| 827 | if (quot_adjust) { |
| 828 | prev_quot = quot_high[i]; |
| 829 | quot_high[i] += quot_adjust; |
| 830 | cpr3_debug(vreg, "adjusted fuse corner %d RO%llu target quot: %llu --> %llu (%d uV)\n", |
| 831 | i, fuse->ro_sel[i], prev_quot, quot_high[i], |
| 832 | volt_adjust_fuse[i]); |
| 833 | } |
| 834 | |
| 835 | if (fuse->ro_sel[i] == fuse->ro_sel[i - 1]) |
| 836 | quot_low[i] = quot_high[i - 1]; |
| 837 | else |
| 838 | quot_low[i] += cpr3_quot_adjustment(ro_scale[i], |
| 839 | volt_adjust_fuse[i - 1]); |
| 840 | |
| 841 | if (quot_high[i] < quot_low[i]) { |
| 842 | cpr3_debug(vreg, "quot_high[%d]=%llu < quot_low[%d]=%llu after adjustment; overriding: quot_high[%d]=%llu\n", |
| 843 | i, quot_high[i], i, quot_low[i], |
| 844 | i, quot_low[i]); |
| 845 | quot_high[i] = quot_low[i]; |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | /* Interpolate voltages for the higher fuse corners. */ |
| 850 | for (i = 1; i < vreg->fuse_corner_count; i++) { |
| 851 | freq_low = vreg->corner[fmax_corner[i - 1]].proc_freq; |
| 852 | freq_high = vreg->corner[fmax_corner[i]].proc_freq; |
| 853 | |
| 854 | ro = fuse->ro_sel[i]; |
| 855 | for (j = fmax_corner[i - 1] + 1; j <= fmax_corner[i]; j++) |
| 856 | vreg->corner[j].target_quot[ro] = cpr3_interpolate( |
| 857 | freq_low, quot_low[i], freq_high, quot_high[i], |
| 858 | vreg->corner[j].proc_freq); |
| 859 | } |
| 860 | |
| 861 | /* Perform per-corner target quotient adjustment */ |
| 862 | for (i = 0; i < vreg->corner_count; i++) { |
| 863 | fuse_corner = vreg->corner[i].cpr_fuse_corner; |
| 864 | ro = fuse->ro_sel[fuse_corner]; |
| 865 | quot_adjust = cpr3_quot_adjustment(ro_scale[fuse_corner], |
| 866 | volt_adjust[i]); |
| 867 | if (quot_adjust) { |
| 868 | prev_quot = vreg->corner[i].target_quot[ro]; |
| 869 | vreg->corner[i].target_quot[ro] += quot_adjust; |
| 870 | cpr3_debug(vreg, "adjusted corner %d RO%u target quot: %llu --> %u (%d uV)\n", |
| 871 | i, ro, prev_quot, |
| 872 | vreg->corner[i].target_quot[ro], |
| 873 | volt_adjust[i]); |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | /* Ensure that target quotients increase monotonically */ |
| 878 | for (i = 1; i < vreg->corner_count; i++) { |
| 879 | ro = fuse->ro_sel[vreg->corner[i].cpr_fuse_corner]; |
| 880 | if (fuse->ro_sel[vreg->corner[i - 1].cpr_fuse_corner] == ro |
| 881 | && vreg->corner[i].target_quot[ro] |
| 882 | < vreg->corner[i - 1].target_quot[ro]) { |
| 883 | cpr3_debug(vreg, "adjusted corner %d RO%u target quot=%u < adjusted corner %d RO%u target quot=%u; overriding: corner %d RO%u target quot=%u\n", |
| 884 | i, ro, vreg->corner[i].target_quot[ro], |
| 885 | i - 1, ro, vreg->corner[i - 1].target_quot[ro], |
| 886 | i, ro, vreg->corner[i - 1].target_quot[ro]); |
| 887 | vreg->corner[i].target_quot[ro] |
| 888 | = vreg->corner[i - 1].target_quot[ro]; |
| 889 | } |
| 890 | } |
| 891 | |
| 892 | done: |
| 893 | kfree(volt_adjust); |
| 894 | kfree(volt_adjust_fuse); |
| 895 | kfree(ro_scale); |
| 896 | kfree(fmax_corner); |
| 897 | kfree(quot_low); |
| 898 | kfree(quot_high); |
| 899 | return rc; |
| 900 | } |
| 901 | |
| 902 | /** |
| 903 | * cpr4_apss_print_settings() - print out APSS CPR configuration settings into |
| 904 | * the kernel log for debugging purposes |
| 905 | * @vreg: Pointer to the CPR3 regulator |
| 906 | */ |
| 907 | static void cpr4_apss_print_settings(struct cpr3_regulator *vreg) |
| 908 | { |
| 909 | struct cpr3_corner *corner; |
| 910 | int i; |
| 911 | |
| 912 | cpr3_debug(vreg, "Corner: Frequency (Hz), Fuse Corner, Floor (uV), Open-Loop (uV), Ceiling (uV)\n"); |
| 913 | for (i = 0; i < vreg->corner_count; i++) { |
| 914 | corner = &vreg->corner[i]; |
| 915 | cpr3_debug(vreg, "%3d: %10u, %2d, %7d, %7d, %7d\n", |
| 916 | i, corner->proc_freq, corner->cpr_fuse_corner, |
| 917 | corner->floor_volt, corner->open_loop_volt, |
| 918 | corner->ceiling_volt); |
| 919 | } |
| 920 | |
| 921 | if (vreg->thread->ctrl->apm) |
| 922 | cpr3_debug(vreg, "APM threshold = %d uV, APM adjust = %d uV\n", |
| 923 | vreg->thread->ctrl->apm_threshold_volt, |
| 924 | vreg->thread->ctrl->apm_adj_volt); |
| 925 | } |
| 926 | |
| 927 | /** |
| 928 | * cpr4_apss_init_thread() - perform steps necessary to initialize the |
| 929 | * configuration data for a CPR3 thread |
| 930 | * @thread: Pointer to the CPR3 thread |
| 931 | * |
| 932 | * Return: 0 on success, errno on failure |
| 933 | */ |
| 934 | static int cpr4_apss_init_thread(struct cpr3_thread *thread) |
| 935 | { |
| 936 | int rc; |
| 937 | |
| 938 | rc = cpr3_parse_common_thread_data(thread); |
| 939 | if (rc) { |
| 940 | cpr3_err(thread->ctrl, "thread %u unable to read CPR thread data from device tree, rc=%d\n", |
| 941 | thread->thread_id, rc); |
| 942 | return rc; |
| 943 | } |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * cpr4_apss_parse_temp_adj_properties() - parse temperature based |
| 950 | * adjustment properties from device tree. |
| 951 | * @ctrl: Pointer to the CPR3 controller |
| 952 | * |
| 953 | * Return: 0 on success, errno on failure |
| 954 | */ |
| 955 | static int cpr4_apss_parse_temp_adj_properties(struct cpr3_controller *ctrl) |
| 956 | { |
| 957 | struct device_node *of_node = ctrl->dev->of_node; |
| 958 | int rc, i, len, temp_point_count; |
| 959 | |
| 960 | if (!of_find_property(of_node, "qcom,cpr-temp-point-map", &len)) { |
| 961 | /* |
| 962 | * Temperature based adjustments are not defined. Single |
| 963 | * temperature band is still valid for per-online-core |
| 964 | * adjustments. |
| 965 | */ |
| 966 | ctrl->temp_band_count = 1; |
| 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | temp_point_count = len / sizeof(u32); |
| 971 | if (temp_point_count <= 0 |
| 972 | || temp_point_count > MSM8953_APSS_MAX_TEMP_POINTS) { |
| 973 | cpr3_err(ctrl, "invalid number of temperature points %d > %d (max)\n", |
| 974 | temp_point_count, MSM8953_APSS_MAX_TEMP_POINTS); |
| 975 | return -EINVAL; |
| 976 | } |
| 977 | |
| 978 | ctrl->temp_points = devm_kcalloc(ctrl->dev, temp_point_count, |
| 979 | sizeof(*ctrl->temp_points), GFP_KERNEL); |
| 980 | if (!ctrl->temp_points) |
| 981 | return -ENOMEM; |
| 982 | |
| 983 | rc = of_property_read_u32_array(of_node, "qcom,cpr-temp-point-map", |
| 984 | ctrl->temp_points, temp_point_count); |
| 985 | if (rc) { |
| 986 | cpr3_err(ctrl, "error reading property qcom,cpr-temp-point-map, rc=%d\n", |
| 987 | rc); |
| 988 | return rc; |
| 989 | } |
| 990 | |
| 991 | for (i = 0; i < temp_point_count; i++) |
| 992 | cpr3_debug(ctrl, "Temperature Point %d=%d\n", i, |
| 993 | ctrl->temp_points[i]); |
| 994 | |
| 995 | /* |
| 996 | * If t1, t2, and t3 are the temperature points, then the temperature |
| 997 | * bands are: (-inf, t1], (t1, t2], (t2, t3], and (t3, inf). |
| 998 | */ |
| 999 | ctrl->temp_band_count = temp_point_count + 1; |
| 1000 | cpr3_debug(ctrl, "Number of temp bands =%d\n", ctrl->temp_band_count); |
| 1001 | |
| 1002 | rc = of_property_read_u32(of_node, "qcom,cpr-initial-temp-band", |
| 1003 | &ctrl->initial_temp_band); |
| 1004 | if (rc) { |
| 1005 | cpr3_err(ctrl, "error reading qcom,cpr-initial-temp-band, rc=%d\n", |
| 1006 | rc); |
| 1007 | return rc; |
| 1008 | } |
| 1009 | |
| 1010 | if (ctrl->initial_temp_band >= ctrl->temp_band_count) { |
| 1011 | cpr3_err(ctrl, "Initial temperature band value %d should be in range [0 - %d]\n", |
| 1012 | ctrl->initial_temp_band, ctrl->temp_band_count - 1); |
| 1013 | return -EINVAL; |
| 1014 | } |
| 1015 | |
| 1016 | ctrl->temp_sensor_id_start = MSM8953_APSS_TEMP_SENSOR_ID_START; |
| 1017 | ctrl->temp_sensor_id_end = MSM8953_APSS_TEMP_SENSOR_ID_END; |
| 1018 | ctrl->allow_temp_adj = true; |
| 1019 | return rc; |
| 1020 | } |
| 1021 | |
| 1022 | /** |
| 1023 | * cpr4_apss_parse_boost_properties() - parse configuration data for boost |
| 1024 | * voltage adjustment for CPR3 regulator from device tree. |
| 1025 | * @vreg: Pointer to the CPR3 regulator |
| 1026 | * |
| 1027 | * Return: 0 on success, errno on failure |
| 1028 | */ |
| 1029 | static int cpr4_apss_parse_boost_properties(struct cpr3_regulator *vreg) |
| 1030 | { |
| 1031 | struct cpr3_controller *ctrl = vreg->thread->ctrl; |
| 1032 | struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; |
| 1033 | struct cpr3_corner *corner; |
| 1034 | int i, boost_voltage, final_boost_volt, rc = 0; |
| 1035 | int *boost_table = NULL, *boost_temp_adj = NULL; |
| 1036 | int boost_voltage_adjust = 0, boost_num_cores = 0; |
| 1037 | u32 boost_allowed = 0; |
| 1038 | |
| 1039 | if (!boost_fuse[fuse->boost_cfg]) |
| 1040 | /* Voltage boost is disabled in fuse */ |
| 1041 | return 0; |
| 1042 | |
| 1043 | if (of_find_property(vreg->of_node, "qcom,allow-boost", NULL)) { |
| 1044 | rc = cpr3_parse_array_property(vreg, "qcom,allow-boost", 1, |
| 1045 | &boost_allowed); |
| 1046 | if (rc) |
| 1047 | return rc; |
| 1048 | } |
| 1049 | |
| 1050 | if (!boost_allowed) { |
| 1051 | /* Voltage boost is not enabled for this regulator */ |
| 1052 | return 0; |
| 1053 | } |
| 1054 | |
| 1055 | boost_voltage = cpr3_convert_open_loop_voltage_fuse( |
| 1056 | MSM8953_APSS_BOOST_FUSE_REF_VOLT, |
| 1057 | MSM8953_APSS_FUSE_STEP_VOLT, |
| 1058 | fuse->boost_voltage, |
| 1059 | MSM8953_APSS_VOLTAGE_FUSE_SIZE); |
| 1060 | |
| 1061 | /* Log boost voltage value for debugging purposes. */ |
| 1062 | cpr3_info(vreg, "Boost open-loop=%7d uV\n", boost_voltage); |
| 1063 | |
| 1064 | if (of_find_property(vreg->of_node, |
| 1065 | "qcom,cpr-boost-voltage-fuse-adjustment", NULL)) { |
| 1066 | rc = cpr3_parse_array_property(vreg, |
| 1067 | "qcom,cpr-boost-voltage-fuse-adjustment", |
| 1068 | 1, &boost_voltage_adjust); |
| 1069 | if (rc) { |
| 1070 | cpr3_err(vreg, "qcom,cpr-boost-voltage-fuse-adjustment reading failed, rc=%d\n", |
| 1071 | rc); |
| 1072 | return rc; |
| 1073 | } |
| 1074 | |
| 1075 | boost_voltage += boost_voltage_adjust; |
| 1076 | /* Log boost voltage value for debugging purposes. */ |
| 1077 | cpr3_info(vreg, "Adjusted boost open-loop=%7d uV\n", |
| 1078 | boost_voltage); |
| 1079 | } |
| 1080 | |
| 1081 | /* Limit boost voltage value between ceiling and floor voltage limits */ |
| 1082 | boost_voltage = min(boost_voltage, MSM8953_APSS_BOOST_CEILING_VOLT); |
| 1083 | boost_voltage = max(boost_voltage, MSM8953_APSS_BOOST_FLOOR_VOLT); |
| 1084 | |
| 1085 | /* |
| 1086 | * The boost feature can only be used for the highest voltage corner. |
| 1087 | * Also, keep core-count adjustments disabled when the boost feature |
| 1088 | * is enabled. |
| 1089 | */ |
| 1090 | corner = &vreg->corner[vreg->corner_count - 1]; |
| 1091 | if (!corner->sdelta) { |
| 1092 | /* |
| 1093 | * If core-count/temp adjustments are not defined, the cpr4 |
| 1094 | * sdelta for this corner will not be allocated. Allocate it |
| 1095 | * here for boost configuration. |
| 1096 | */ |
| 1097 | corner->sdelta = devm_kzalloc(ctrl->dev, |
| 1098 | sizeof(*corner->sdelta), GFP_KERNEL); |
| 1099 | if (!corner->sdelta) |
| 1100 | return -ENOMEM; |
| 1101 | } |
| 1102 | corner->sdelta->temp_band_count = ctrl->temp_band_count; |
| 1103 | |
| 1104 | rc = of_property_read_u32(vreg->of_node, "qcom,cpr-num-boost-cores", |
| 1105 | &boost_num_cores); |
| 1106 | if (rc) { |
| 1107 | cpr3_err(vreg, "qcom,cpr-num-boost-cores reading failed, rc=%d\n", |
| 1108 | rc); |
| 1109 | return rc; |
| 1110 | } |
| 1111 | |
| 1112 | if (boost_num_cores <= 0 |
| 1113 | || boost_num_cores > MSM8953_APSS_CPR_SDELTA_CORE_COUNT) { |
| 1114 | cpr3_err(vreg, "Invalid boost number of cores = %d\n", |
| 1115 | boost_num_cores); |
| 1116 | return -EINVAL; |
| 1117 | } |
| 1118 | corner->sdelta->boost_num_cores = boost_num_cores; |
| 1119 | |
| 1120 | boost_table = devm_kcalloc(ctrl->dev, corner->sdelta->temp_band_count, |
| 1121 | sizeof(*boost_table), GFP_KERNEL); |
| 1122 | if (!boost_table) |
| 1123 | return -ENOMEM; |
| 1124 | |
| 1125 | if (of_find_property(vreg->of_node, |
| 1126 | "qcom,cpr-boost-temp-adjustment", NULL)) { |
| 1127 | boost_temp_adj = kcalloc(corner->sdelta->temp_band_count, |
| 1128 | sizeof(*boost_temp_adj), GFP_KERNEL); |
| 1129 | if (!boost_temp_adj) |
| 1130 | return -ENOMEM; |
| 1131 | |
| 1132 | rc = cpr3_parse_array_property(vreg, |
| 1133 | "qcom,cpr-boost-temp-adjustment", |
| 1134 | corner->sdelta->temp_band_count, |
| 1135 | boost_temp_adj); |
| 1136 | if (rc) { |
| 1137 | cpr3_err(vreg, "qcom,cpr-boost-temp-adjustment reading failed, rc=%d\n", |
| 1138 | rc); |
| 1139 | goto done; |
| 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | for (i = 0; i < corner->sdelta->temp_band_count; i++) { |
| 1144 | /* Apply static adjustments to boost voltage */ |
| 1145 | final_boost_volt = boost_voltage + (boost_temp_adj == NULL |
| 1146 | ? 0 : boost_temp_adj[i]); |
| 1147 | /* |
| 1148 | * Limit final adjusted boost voltage value between ceiling |
| 1149 | * and floor voltage limits |
| 1150 | */ |
| 1151 | final_boost_volt = min(final_boost_volt, |
| 1152 | MSM8953_APSS_BOOST_CEILING_VOLT); |
| 1153 | final_boost_volt = max(final_boost_volt, |
| 1154 | MSM8953_APSS_BOOST_FLOOR_VOLT); |
| 1155 | |
| 1156 | boost_table[i] = (corner->open_loop_volt - final_boost_volt) |
| 1157 | / ctrl->step_volt; |
| 1158 | cpr3_debug(vreg, "Adjusted boost voltage margin for temp band %d = %d steps\n", |
| 1159 | i, boost_table[i]); |
| 1160 | } |
| 1161 | |
| 1162 | corner->ceiling_volt = MSM8953_APSS_BOOST_CEILING_VOLT; |
| 1163 | corner->sdelta->boost_table = boost_table; |
| 1164 | corner->sdelta->allow_boost = true; |
| 1165 | corner->sdelta->allow_core_count_adj = false; |
| 1166 | vreg->allow_boost = true; |
| 1167 | ctrl->allow_boost = true; |
| 1168 | done: |
| 1169 | kfree(boost_temp_adj); |
| 1170 | return rc; |
| 1171 | } |
| 1172 | |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 1173 | /* |
| 1174 | * Constants which define the selection fuse parameters used in fuse combo map |
| 1175 | * logic. |
| 1176 | */ |
| 1177 | enum cpr4_msm8953_apss_fuse_combo_parameters { |
| 1178 | MSM8953_APSS_SPEED_BIN = 0, |
| 1179 | MSM8953_APSS_CPR_FUSE_REV, |
| 1180 | MSM8953_APSS_FOUNDRY_ID, |
| 1181 | MSM8953_APSS_FUSE_COMBO_PARAM_COUNT, |
| 1182 | }; |
| 1183 | |
| 1184 | /** |
| 1185 | * cpr4_parse_fuse_combo_map() - parse APSS fuse combo map data from device tree |
| 1186 | * properties of the CPR3 regulator's device node |
| 1187 | * @vreg: Pointer to the CPR3 regulator |
| 1188 | * |
| 1189 | * Return: 0 on success, errno on failure |
| 1190 | */ |
| 1191 | static int cpr4_parse_fuse_combo_map(struct cpr3_regulator *vreg) |
| 1192 | { |
| 1193 | struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; |
| 1194 | u64 *fuse_val; |
| 1195 | int rc; |
| 1196 | |
| 1197 | fuse_val = kcalloc(MSM8953_APSS_FUSE_COMBO_PARAM_COUNT, |
| 1198 | sizeof(*fuse_val), GFP_KERNEL); |
| 1199 | if (!fuse_val) |
| 1200 | return -ENOMEM; |
| 1201 | |
| 1202 | fuse_val[MSM8953_APSS_SPEED_BIN] = fuse->speed_bin; |
| 1203 | fuse_val[MSM8953_APSS_CPR_FUSE_REV] = fuse->cpr_fusing_rev; |
| 1204 | fuse_val[MSM8953_APSS_FOUNDRY_ID] = fuse->foundry_id; |
| 1205 | rc = cpr3_parse_fuse_combo_map(vreg, fuse_val, |
| 1206 | MSM8953_APSS_FUSE_COMBO_PARAM_COUNT); |
| 1207 | if (rc == -ENODEV) { |
| 1208 | cpr3_debug(vreg, "using legacy fuse combo logic, rc=%d\n", |
| 1209 | rc); |
| 1210 | rc = 0; |
| 1211 | } else if (rc < 0) { |
| 1212 | cpr3_err(vreg, "error reading fuse combo map data, rc=%d\n", |
| 1213 | rc); |
| 1214 | } else if (vreg->fuse_combo >= |
| 1215 | CPR4_MSM8953_APSS_FUSE_COMBO_MAP_MAX_COUNT) { |
| 1216 | cpr3_err(vreg, "invalid CPR fuse combo = %d found\n", |
| 1217 | vreg->fuse_combo); |
| 1218 | rc = -EINVAL; |
| 1219 | } |
| 1220 | |
| 1221 | kfree(fuse_val); |
| 1222 | return rc; |
| 1223 | } |
| 1224 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 1225 | /** |
| 1226 | * cpr4_apss_init_regulator() - perform all steps necessary to initialize the |
| 1227 | * configuration data for a CPR3 regulator |
| 1228 | * @vreg: Pointer to the CPR3 regulator |
| 1229 | * |
| 1230 | * Return: 0 on success, errno on failure |
| 1231 | */ |
| 1232 | static int cpr4_apss_init_regulator(struct cpr3_regulator *vreg) |
| 1233 | { |
| 1234 | struct cpr4_msm8953_apss_fuses *fuse; |
| 1235 | int rc; |
| 1236 | |
| 1237 | rc = cpr4_msm8953_apss_read_fuse_data(vreg); |
| 1238 | if (rc) { |
| 1239 | cpr3_err(vreg, "unable to read CPR fuse data, rc=%d\n", rc); |
| 1240 | return rc; |
| 1241 | } |
| 1242 | |
| 1243 | fuse = vreg->platform_fuses; |
| 1244 | |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 1245 | rc = cpr4_parse_fuse_combo_map(vreg); |
| 1246 | if (rc) { |
| 1247 | cpr3_err(vreg, "error while parsing fuse combo map, rc=%d\n", |
| 1248 | rc); |
| 1249 | return rc; |
| 1250 | } |
| 1251 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 1252 | rc = cpr4_apss_parse_corner_data(vreg); |
| 1253 | if (rc) { |
| 1254 | cpr3_err(vreg, "unable to read CPR corner data from device tree, rc=%d\n", |
| 1255 | rc); |
| 1256 | return rc; |
| 1257 | } |
| 1258 | |
| 1259 | rc = cpr3_mem_acc_init(vreg); |
| 1260 | if (rc) { |
| 1261 | if (rc != -EPROBE_DEFER) |
| 1262 | cpr3_err(vreg, "unable to initialize mem-acc regulator settings, rc=%d\n", |
| 1263 | rc); |
| 1264 | return rc; |
| 1265 | } |
| 1266 | |
| 1267 | rc = cpr4_msm8953_apss_calculate_open_loop_voltages(vreg); |
| 1268 | if (rc) { |
| 1269 | cpr3_err(vreg, "unable to calculate open-loop voltages, rc=%d\n", |
| 1270 | rc); |
| 1271 | return rc; |
| 1272 | } |
| 1273 | |
| 1274 | rc = cpr3_limit_open_loop_voltages(vreg); |
| 1275 | if (rc) { |
| 1276 | cpr3_err(vreg, "unable to limit open-loop voltages, rc=%d\n", |
| 1277 | rc); |
| 1278 | return rc; |
| 1279 | } |
| 1280 | |
| 1281 | cpr3_open_loop_voltage_as_ceiling(vreg); |
| 1282 | |
| 1283 | rc = cpr3_limit_floor_voltages(vreg); |
| 1284 | if (rc) { |
| 1285 | cpr3_err(vreg, "unable to limit floor voltages, rc=%d\n", rc); |
| 1286 | return rc; |
| 1287 | } |
| 1288 | |
| 1289 | rc = cpr4_msm8953_apss_calculate_target_quotients(vreg); |
| 1290 | if (rc) { |
| 1291 | cpr3_err(vreg, "unable to calculate target quotients, rc=%d\n", |
| 1292 | rc); |
| 1293 | return rc; |
| 1294 | } |
| 1295 | |
| 1296 | rc = cpr4_parse_core_count_temp_voltage_adj(vreg, false); |
| 1297 | if (rc) { |
| 1298 | cpr3_err(vreg, "unable to parse temperature and core count voltage adjustments, rc=%d\n", |
| 1299 | rc); |
| 1300 | return rc; |
| 1301 | } |
| 1302 | |
| 1303 | if (vreg->allow_core_count_adj && (vreg->max_core_count <= 0 |
| 1304 | || vreg->max_core_count > |
| 1305 | MSM8953_APSS_CPR_SDELTA_CORE_COUNT)) { |
| 1306 | cpr3_err(vreg, "qcom,max-core-count has invalid value = %d\n", |
| 1307 | vreg->max_core_count); |
| 1308 | return -EINVAL; |
| 1309 | } |
| 1310 | |
| 1311 | rc = cpr4_apss_parse_boost_properties(vreg); |
| 1312 | if (rc) { |
| 1313 | cpr3_err(vreg, "unable to parse boost adjustments, rc=%d\n", |
| 1314 | rc); |
| 1315 | return rc; |
| 1316 | } |
| 1317 | |
| 1318 | cpr4_apss_print_settings(vreg); |
| 1319 | |
| 1320 | return rc; |
| 1321 | } |
| 1322 | |
| 1323 | /** |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 1324 | * cpr4_apss_init_aging() - perform APSS CPR4 controller specific |
| 1325 | * aging initializations |
| 1326 | * @ctrl: Pointer to the CPR3 controller |
| 1327 | * |
| 1328 | * Return: 0 on success, errno on failure |
| 1329 | */ |
| 1330 | static int cpr4_apss_init_aging(struct cpr3_controller *ctrl) |
| 1331 | { |
| 1332 | struct cpr4_msm8953_apss_fuses *fuse = NULL; |
Tirupathi Reddy | 53d99a0 | 2016-08-08 17:04:23 +0530 | [diff] [blame] | 1333 | struct cpr3_regulator *vreg = NULL; |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 1334 | u32 aging_ro_scale; |
| 1335 | int i, j, rc; |
| 1336 | |
| 1337 | for (i = 0; i < ctrl->thread_count; i++) { |
| 1338 | for (j = 0; j < ctrl->thread[i].vreg_count; j++) { |
| 1339 | if (ctrl->thread[i].vreg[j].aging_allowed) { |
| 1340 | ctrl->aging_required = true; |
| 1341 | vreg = &ctrl->thread[i].vreg[j]; |
| 1342 | fuse = vreg->platform_fuses; |
| 1343 | break; |
| 1344 | } |
| 1345 | } |
| 1346 | } |
| 1347 | |
| 1348 | if (!ctrl->aging_required || !fuse) |
| 1349 | return 0; |
| 1350 | |
| 1351 | rc = cpr3_parse_array_property(vreg, "qcom,cpr-aging-ro-scaling-factor", |
| 1352 | 1, &aging_ro_scale); |
| 1353 | if (rc) |
| 1354 | return rc; |
| 1355 | |
| 1356 | if (aging_ro_scale == 0) { |
| 1357 | cpr3_err(ctrl, "aging RO scaling factor is invalid: %u\n", |
| 1358 | aging_ro_scale); |
| 1359 | return -EINVAL; |
| 1360 | } |
| 1361 | |
| 1362 | ctrl->aging_vdd_mode = REGULATOR_MODE_NORMAL; |
| 1363 | ctrl->aging_complete_vdd_mode = REGULATOR_MODE_IDLE; |
| 1364 | |
| 1365 | ctrl->aging_sensor_count = 1; |
| 1366 | ctrl->aging_sensor = kzalloc(sizeof(*ctrl->aging_sensor), GFP_KERNEL); |
| 1367 | if (!ctrl->aging_sensor) |
| 1368 | return -ENOMEM; |
| 1369 | |
| 1370 | ctrl->aging_sensor->sensor_id = MSM8953_APSS_AGING_SENSOR_ID; |
| 1371 | ctrl->aging_sensor->ro_scale = aging_ro_scale; |
| 1372 | |
| 1373 | ctrl->aging_sensor->init_quot_diff |
| 1374 | = cpr3_convert_open_loop_voltage_fuse(0, |
| 1375 | MSM8953_APSS_AGING_INIT_QUOT_DIFF_SCALE, |
| 1376 | fuse->aging_init_quot_diff, |
| 1377 | MSM8953_APSS_AGING_INIT_QUOT_DIFF_SIZE); |
| 1378 | |
| 1379 | if (ctrl->aging_sensor->init_quot_diff == 0) { |
| 1380 | /* |
| 1381 | * Initial quotient difference value '0' has a special meaning |
| 1382 | * in MSM8953 fusing scheme. Use max age margin quotient |
| 1383 | * difference to consider full aging margin of 15 mV. |
| 1384 | */ |
| 1385 | ctrl->aging_sensor->init_quot_diff |
| 1386 | = MSM8953_APSS_AGING_MAX_AGE_MARGIN_QUOT; |
| 1387 | cpr3_debug(ctrl, "Init quotient diff = 0, use max age margin quotient\n"); |
| 1388 | } |
| 1389 | |
| 1390 | cpr3_info(ctrl, "sensor %u aging init quotient diff = %d, aging RO scale = %u QUOT/V\n", |
| 1391 | ctrl->aging_sensor->sensor_id, |
| 1392 | ctrl->aging_sensor->init_quot_diff, |
| 1393 | ctrl->aging_sensor->ro_scale); |
| 1394 | |
| 1395 | return 0; |
| 1396 | } |
| 1397 | |
| 1398 | /** |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 1399 | * cpr4_apss_init_controller() - perform APSS CPR4 controller specific |
| 1400 | * initializations |
| 1401 | * @ctrl: Pointer to the CPR3 controller |
| 1402 | * |
| 1403 | * Return: 0 on success, errno on failure |
| 1404 | */ |
| 1405 | static int cpr4_apss_init_controller(struct cpr3_controller *ctrl) |
| 1406 | { |
| 1407 | int rc; |
| 1408 | |
| 1409 | rc = cpr3_parse_common_ctrl_data(ctrl); |
| 1410 | if (rc) { |
| 1411 | if (rc != -EPROBE_DEFER) |
| 1412 | cpr3_err(ctrl, "unable to parse common controller data, rc=%d\n", |
| 1413 | rc); |
| 1414 | return rc; |
| 1415 | } |
| 1416 | |
| 1417 | rc = of_property_read_u32(ctrl->dev->of_node, |
| 1418 | "qcom,cpr-down-error-step-limit", |
| 1419 | &ctrl->down_error_step_limit); |
| 1420 | if (rc) { |
| 1421 | cpr3_err(ctrl, "error reading qcom,cpr-down-error-step-limit, rc=%d\n", |
| 1422 | rc); |
| 1423 | return rc; |
| 1424 | } |
| 1425 | |
| 1426 | rc = of_property_read_u32(ctrl->dev->of_node, |
| 1427 | "qcom,cpr-up-error-step-limit", |
| 1428 | &ctrl->up_error_step_limit); |
| 1429 | if (rc) { |
| 1430 | cpr3_err(ctrl, "error reading qcom,cpr-up-error-step-limit, rc=%d\n", |
| 1431 | rc); |
| 1432 | return rc; |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * Use fixed step quotient if specified otherwise use dynamic |
| 1437 | * calculated per RO step quotient |
| 1438 | */ |
| 1439 | of_property_read_u32(ctrl->dev->of_node, "qcom,cpr-step-quot-fixed", |
| 1440 | &ctrl->step_quot_fixed); |
| 1441 | ctrl->use_dynamic_step_quot = ctrl->step_quot_fixed ? false : true; |
| 1442 | |
| 1443 | ctrl->saw_use_unit_mV = of_property_read_bool(ctrl->dev->of_node, |
| 1444 | "qcom,cpr-saw-use-unit-mV"); |
| 1445 | |
| 1446 | of_property_read_u32(ctrl->dev->of_node, |
| 1447 | "qcom,cpr-voltage-settling-time", |
| 1448 | &ctrl->voltage_settling_time); |
| 1449 | |
| 1450 | ctrl->vdd_limit_regulator = devm_regulator_get(ctrl->dev, "vdd-limit"); |
| 1451 | if (IS_ERR(ctrl->vdd_limit_regulator)) { |
| 1452 | rc = PTR_ERR(ctrl->vdd_limit_regulator); |
| 1453 | if (rc != -EPROBE_DEFER) |
| 1454 | cpr3_err(ctrl, "unable to request vdd-limit regulator, rc=%d\n", |
| 1455 | rc); |
| 1456 | return rc; |
| 1457 | } |
| 1458 | |
| 1459 | rc = cpr3_apm_init(ctrl); |
| 1460 | if (rc) { |
| 1461 | if (rc != -EPROBE_DEFER) |
| 1462 | cpr3_err(ctrl, "unable to initialize APM settings, rc=%d\n", |
| 1463 | rc); |
| 1464 | return rc; |
| 1465 | } |
| 1466 | |
| 1467 | rc = cpr4_apss_parse_temp_adj_properties(ctrl); |
| 1468 | if (rc) { |
| 1469 | cpr3_err(ctrl, "unable to parse temperature adjustment properties, rc=%d\n", |
| 1470 | rc); |
| 1471 | return rc; |
| 1472 | } |
| 1473 | |
| 1474 | ctrl->sensor_count = MSM8953_APSS_CPR_SENSOR_COUNT; |
| 1475 | |
| 1476 | /* |
| 1477 | * APSS only has one thread (0) per controller so the zeroed |
| 1478 | * array does not need further modification. |
| 1479 | */ |
| 1480 | ctrl->sensor_owner = devm_kcalloc(ctrl->dev, ctrl->sensor_count, |
| 1481 | sizeof(*ctrl->sensor_owner), GFP_KERNEL); |
| 1482 | if (!ctrl->sensor_owner) |
| 1483 | return -ENOMEM; |
| 1484 | |
| 1485 | ctrl->cpr_clock_rate = MSM8953_APSS_CPR_CLOCK_RATE; |
| 1486 | ctrl->ctrl_type = CPR_CTRL_TYPE_CPR4; |
| 1487 | ctrl->supports_hw_closed_loop = true; |
| 1488 | ctrl->use_hw_closed_loop = of_property_read_bool(ctrl->dev->of_node, |
| 1489 | "qcom,cpr-hw-closed-loop"); |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
| 1493 | static int cpr4_apss_regulator_suspend(struct platform_device *pdev, |
| 1494 | pm_message_t state) |
| 1495 | { |
| 1496 | struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| 1497 | |
| 1498 | return cpr3_regulator_suspend(ctrl); |
| 1499 | } |
| 1500 | |
| 1501 | static int cpr4_apss_regulator_resume(struct platform_device *pdev) |
| 1502 | { |
| 1503 | struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| 1504 | |
| 1505 | return cpr3_regulator_resume(ctrl); |
| 1506 | } |
| 1507 | |
| 1508 | static int cpr4_apss_regulator_probe(struct platform_device *pdev) |
| 1509 | { |
| 1510 | struct device *dev = &pdev->dev; |
| 1511 | struct cpr3_controller *ctrl; |
| 1512 | int i, rc; |
| 1513 | |
| 1514 | if (!dev->of_node) { |
| 1515 | dev_err(dev, "Device tree node is missing\n"); |
| 1516 | return -EINVAL; |
| 1517 | } |
| 1518 | |
| 1519 | ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); |
| 1520 | if (!ctrl) |
| 1521 | return -ENOMEM; |
| 1522 | |
| 1523 | ctrl->dev = dev; |
| 1524 | /* Set to false later if anything precludes CPR operation. */ |
| 1525 | ctrl->cpr_allowed_hw = true; |
| 1526 | |
| 1527 | rc = of_property_read_string(dev->of_node, "qcom,cpr-ctrl-name", |
| 1528 | &ctrl->name); |
| 1529 | if (rc) { |
| 1530 | cpr3_err(ctrl, "unable to read qcom,cpr-ctrl-name, rc=%d\n", |
| 1531 | rc); |
| 1532 | return rc; |
| 1533 | } |
| 1534 | |
| 1535 | rc = cpr3_map_fuse_base(ctrl, pdev); |
| 1536 | if (rc) { |
| 1537 | cpr3_err(ctrl, "could not map fuse base address\n"); |
| 1538 | return rc; |
| 1539 | } |
| 1540 | |
| 1541 | rc = cpr3_allocate_threads(ctrl, 0, 0); |
| 1542 | if (rc) { |
| 1543 | cpr3_err(ctrl, "failed to allocate CPR thread array, rc=%d\n", |
| 1544 | rc); |
| 1545 | return rc; |
| 1546 | } |
| 1547 | |
| 1548 | if (ctrl->thread_count != 1) { |
| 1549 | cpr3_err(ctrl, "expected 1 thread but found %d\n", |
| 1550 | ctrl->thread_count); |
| 1551 | return -EINVAL; |
| 1552 | } |
| 1553 | |
| 1554 | rc = cpr4_apss_init_controller(ctrl); |
| 1555 | if (rc) { |
| 1556 | if (rc != -EPROBE_DEFER) |
| 1557 | cpr3_err(ctrl, "failed to initialize CPR controller parameters, rc=%d\n", |
| 1558 | rc); |
| 1559 | return rc; |
| 1560 | } |
| 1561 | |
| 1562 | rc = cpr4_apss_init_thread(&ctrl->thread[0]); |
| 1563 | if (rc) { |
| 1564 | cpr3_err(ctrl, "thread initialization failed, rc=%d\n", rc); |
| 1565 | return rc; |
| 1566 | } |
| 1567 | |
| 1568 | for (i = 0; i < ctrl->thread[0].vreg_count; i++) { |
| 1569 | rc = cpr4_apss_init_regulator(&ctrl->thread[0].vreg[i]); |
| 1570 | if (rc) { |
| 1571 | cpr3_err(&ctrl->thread[0].vreg[i], "regulator initialization failed, rc=%d\n", |
| 1572 | rc); |
| 1573 | return rc; |
| 1574 | } |
| 1575 | } |
| 1576 | |
Tirupathi Reddy | 1bcb64f | 2016-03-01 16:54:40 +0530 | [diff] [blame] | 1577 | rc = cpr4_apss_init_aging(ctrl); |
| 1578 | if (rc) { |
| 1579 | cpr3_err(ctrl, "failed to initialize aging configurations, rc=%d\n", |
| 1580 | rc); |
| 1581 | return rc; |
| 1582 | } |
| 1583 | |
David Collins | 7370f1a | 2017-01-18 16:21:53 -0800 | [diff] [blame] | 1584 | platform_set_drvdata(pdev, ctrl); |
| 1585 | |
| 1586 | return cpr3_regulator_register(pdev, ctrl); |
| 1587 | } |
| 1588 | |
| 1589 | static int cpr4_apss_regulator_remove(struct platform_device *pdev) |
| 1590 | { |
| 1591 | struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| 1592 | |
| 1593 | return cpr3_regulator_unregister(ctrl); |
| 1594 | } |
| 1595 | |
| 1596 | static const struct of_device_id cpr4_regulator_match_table[] = { |
| 1597 | { .compatible = "qcom,cpr4-msm8953-apss-regulator", }, |
| 1598 | {} |
| 1599 | }; |
| 1600 | |
| 1601 | static struct platform_driver cpr4_apss_regulator_driver = { |
| 1602 | .driver = { |
| 1603 | .name = "qcom,cpr4-apss-regulator", |
| 1604 | .of_match_table = cpr4_regulator_match_table, |
| 1605 | .owner = THIS_MODULE, |
| 1606 | }, |
| 1607 | .probe = cpr4_apss_regulator_probe, |
| 1608 | .remove = cpr4_apss_regulator_remove, |
| 1609 | .suspend = cpr4_apss_regulator_suspend, |
| 1610 | .resume = cpr4_apss_regulator_resume, |
| 1611 | }; |
| 1612 | |
| 1613 | static int cpr4_regulator_init(void) |
| 1614 | { |
| 1615 | return platform_driver_register(&cpr4_apss_regulator_driver); |
| 1616 | } |
| 1617 | |
| 1618 | static void cpr4_regulator_exit(void) |
| 1619 | { |
| 1620 | platform_driver_unregister(&cpr4_apss_regulator_driver); |
| 1621 | } |
| 1622 | |
| 1623 | MODULE_DESCRIPTION("CPR4 APSS regulator driver"); |
| 1624 | MODULE_LICENSE("GPL v2"); |
| 1625 | |
| 1626 | arch_initcall(cpr4_regulator_init); |
| 1627 | module_exit(cpr4_regulator_exit); |