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 | #include <linux/regulator/msm-ldo-regulator.h> |
| 36 | |
| 37 | #include "cpr3-regulator.h" |
| 38 | |
| 39 | #define MSM8996_HMSS_FUSE_CORNERS 5 |
| 40 | |
| 41 | /** |
| 42 | * struct cpr3_msm8996_hmss_fuses - HMSS specific fuse data for MSM8996 |
| 43 | * @ro_sel: Ring oscillator select fuse parameter value for each |
| 44 | * fuse corner |
| 45 | * @init_voltage: Initial (i.e. open-loop) voltage fuse parameter value |
| 46 | * for each fuse corner (raw, not converted to a voltage) |
| 47 | * @target_quot: CPR target quotient fuse parameter value for each fuse |
| 48 | * corner |
| 49 | * @quot_offset: CPR target quotient offset fuse parameter value for each |
| 50 | * fuse corner (raw, not unpacked) used for target quotient |
| 51 | * interpolation |
| 52 | * @speed_bin: Application processor speed bin fuse parameter value for |
| 53 | * the given chip |
| 54 | * @cbf_voltage_offset: Voltage margin offset for the CBF regulator used on |
| 55 | * MSM8996-Pro chips. |
| 56 | * @cpr_fusing_rev: CPR fusing revision fuse parameter value |
| 57 | * @redundant_fusing: Redundant fusing select fuse parameter value |
| 58 | * @limitation: CPR limitation select fuse parameter value |
| 59 | * @partial_binning: Chip partial binning fuse parameter value which defines |
| 60 | * limitations found on a given chip |
| 61 | * @vdd_mx_ret_fuse: Defines the logic retention voltage of VDD_MX |
| 62 | * @vdd_apcc_ret_fuse: Defines the logic retention voltage of VDD_APCC |
| 63 | * @aging_init_quot_diff: Initial quotient difference between CPR aging |
| 64 | * min and max sensors measured at time of manufacturing |
| 65 | * |
| 66 | * This struct holds the values for all of the fuses read from memory. The |
| 67 | * values for ro_sel, init_voltage, target_quot, and quot_offset come from |
| 68 | * either the primary or redundant fuse locations depending upon the value of |
| 69 | * redundant_fusing. |
| 70 | */ |
| 71 | struct cpr3_msm8996_hmss_fuses { |
| 72 | u64 ro_sel[MSM8996_HMSS_FUSE_CORNERS]; |
| 73 | u64 init_voltage[MSM8996_HMSS_FUSE_CORNERS]; |
| 74 | u64 target_quot[MSM8996_HMSS_FUSE_CORNERS]; |
| 75 | u64 quot_offset[MSM8996_HMSS_FUSE_CORNERS]; |
| 76 | u64 cbf_voltage_offset[MSM8996_HMSS_FUSE_CORNERS]; |
| 77 | u64 speed_bin; |
| 78 | u64 cpr_fusing_rev; |
| 79 | u64 redundant_fusing; |
| 80 | u64 limitation; |
| 81 | u64 partial_binning; |
| 82 | u64 vdd_mx_ret_fuse; |
| 83 | u64 vdd_apcc_ret_fuse; |
| 84 | u64 aging_init_quot_diff; |
| 85 | }; |
| 86 | |
| 87 | /* |
| 88 | * Fuse combos 0 - 7 map to CPR fusing revision 0 - 7 with speed bin fuse = 0. |
| 89 | * Fuse combos 8 - 15 map to CPR fusing revision 0 - 7 with speed bin fuse = 1. |
| 90 | */ |
| 91 | #define CPR3_MSM8996_HMSS_FUSE_COMBO_COUNT 16 |
| 92 | |
| 93 | /* |
| 94 | * Constants which define the name of each fuse corner. Note that no actual |
| 95 | * fuses are defined for LowSVS. However, a mapping from corner to LowSVS |
| 96 | * is required in order to perform target quotient interpolation properly. |
| 97 | */ |
| 98 | enum cpr3_msm8996_hmss_fuse_corner { |
| 99 | CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS = 0, |
| 100 | CPR3_MSM8996_HMSS_FUSE_CORNER_LOWSVS = 1, |
| 101 | CPR3_MSM8996_HMSS_FUSE_CORNER_SVS = 2, |
| 102 | CPR3_MSM8996_HMSS_FUSE_CORNER_NOM = 3, |
| 103 | CPR3_MSM8996_HMSS_FUSE_CORNER_TURBO = 4, |
| 104 | }; |
| 105 | |
| 106 | static const char * const cpr3_msm8996_hmss_fuse_corner_name[] = { |
| 107 | [CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS] = "MinSVS", |
| 108 | [CPR3_MSM8996_HMSS_FUSE_CORNER_LOWSVS] = "LowSVS", |
| 109 | [CPR3_MSM8996_HMSS_FUSE_CORNER_SVS] = "SVS", |
| 110 | [CPR3_MSM8996_HMSS_FUSE_CORNER_NOM] = "NOM", |
| 111 | [CPR3_MSM8996_HMSS_FUSE_CORNER_TURBO] = "TURBO", |
| 112 | }; |
| 113 | |
| 114 | /* CPR3 hardware thread IDs */ |
| 115 | #define MSM8996_HMSS_POWER_CLUSTER_THREAD_ID 0 |
| 116 | #define MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID 1 |
| 117 | |
| 118 | /* |
| 119 | * MSM8996 HMSS fuse parameter locations: |
| 120 | * |
| 121 | * Structs are organized with the following dimensions: |
| 122 | * Outer: 0 or 1 for power or performance cluster |
| 123 | * Middle: 0 to 3 for fuse corners from lowest to highest corner |
| 124 | * Inner: large enough to hold the longest set of parameter segments which |
| 125 | * fully defines a fuse parameter, +1 (for NULL termination). |
| 126 | * Each segment corresponds to a contiguous group of bits from a |
| 127 | * single fuse row. These segments are concatentated together in |
| 128 | * order to form the full fuse parameter value. The segments for |
| 129 | * a given parameter may correspond to different fuse rows. |
| 130 | * |
| 131 | * Note that there are only physically 4 sets of fuse parameters which |
| 132 | * correspond to the MinSVS, SVS, NOM, and TURBO fuse corners. However, the SVS |
| 133 | * quotient offset fuse is used to define the target quotient for the LowSVS |
| 134 | * fuse corner. In order to utilize LowSVS, it must be treated as if it were a |
| 135 | * real fully defined fuse corner. Thus, LowSVS fuse parameter locations are |
| 136 | * specified. These locations duplicate the SVS values in order to simplify |
| 137 | * interpolation logic. |
| 138 | */ |
| 139 | static const struct cpr3_fuse_param |
| 140 | msm8996_hmss_ro_sel_param[2][MSM8996_HMSS_FUSE_CORNERS][2] = { |
| 141 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 142 | {{66, 38, 41}, {} }, |
| 143 | {{66, 38, 41}, {} }, |
| 144 | {{66, 38, 41}, {} }, |
| 145 | {{66, 34, 37}, {} }, |
| 146 | {{66, 30, 33}, {} }, |
| 147 | }, |
| 148 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 149 | {{64, 54, 57}, {} }, |
| 150 | {{64, 54, 57}, {} }, |
| 151 | {{64, 54, 57}, {} }, |
| 152 | {{64, 50, 53}, {} }, |
| 153 | {{64, 46, 49}, {} }, |
| 154 | }, |
| 155 | }; |
| 156 | |
| 157 | static const struct cpr3_fuse_param |
| 158 | msm8996_hmss_init_voltage_param[2][MSM8996_HMSS_FUSE_CORNERS][3] = { |
| 159 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 160 | {{67, 0, 5}, {} }, |
| 161 | {{66, 58, 63}, {} }, |
| 162 | {{66, 58, 63}, {} }, |
| 163 | {{66, 52, 57}, {} }, |
| 164 | {{66, 46, 51}, {} }, |
| 165 | }, |
| 166 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 167 | {{65, 16, 21}, {} }, |
| 168 | {{65, 10, 15}, {} }, |
| 169 | {{65, 10, 15}, {} }, |
| 170 | {{65, 4, 9}, {} }, |
| 171 | {{64, 62, 63}, {65, 0, 3}, {} }, |
| 172 | }, |
| 173 | }; |
| 174 | |
| 175 | static const struct cpr3_fuse_param |
| 176 | msm8996_hmss_target_quot_param[2][MSM8996_HMSS_FUSE_CORNERS][3] = { |
| 177 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 178 | {{67, 42, 53}, {} }, |
| 179 | {{67, 30, 41}, {} }, |
| 180 | {{67, 30, 41}, {} }, |
| 181 | {{67, 18, 29}, {} }, |
| 182 | {{67, 6, 17}, {} }, |
| 183 | }, |
| 184 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 185 | {{65, 58, 63}, {66, 0, 5}, {} }, |
| 186 | {{65, 46, 57}, {} }, |
| 187 | {{65, 46, 57}, {} }, |
| 188 | {{65, 34, 45}, {} }, |
| 189 | {{65, 22, 33}, {} }, |
| 190 | }, |
| 191 | }; |
| 192 | |
| 193 | static const struct cpr3_fuse_param |
| 194 | msm8996_hmss_quot_offset_param[2][MSM8996_HMSS_FUSE_CORNERS][3] = { |
| 195 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 196 | {{} }, |
| 197 | {{} }, |
| 198 | {{68, 6, 13}, {} }, |
| 199 | {{67, 62, 63}, {68, 0, 5}, {} }, |
| 200 | {{67, 54, 61}, {} }, |
| 201 | }, |
| 202 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 203 | {{} }, |
| 204 | {{} }, |
| 205 | {{66, 22, 29}, {} }, |
| 206 | {{66, 14, 21}, {} }, |
| 207 | {{66, 6, 13}, {} }, |
| 208 | }, |
| 209 | }; |
| 210 | |
| 211 | /* |
| 212 | * This fuse is used to define if the redundant set of fuses should be used for |
| 213 | * any particular feature. CPR is one such feature. The redundant CPR fuses |
| 214 | * should be used if this fuse parameter has a value of 1. |
| 215 | */ |
| 216 | static const struct cpr3_fuse_param msm8996_redundant_fusing_param[] = { |
| 217 | {73, 61, 63}, |
| 218 | {}, |
| 219 | }; |
| 220 | #define MSM8996_CPR_REDUNDANT_FUSING 1 |
| 221 | |
| 222 | static const struct cpr3_fuse_param |
| 223 | msm8996_hmss_redun_ro_sel_param[2][MSM8996_HMSS_FUSE_CORNERS][2] = { |
| 224 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 225 | {{76, 36, 39}, {} }, |
| 226 | {{76, 32, 35}, {} }, |
| 227 | {{76, 32, 35}, {} }, |
| 228 | {{76, 28, 31}, {} }, |
| 229 | {{76, 24, 27}, {} }, |
| 230 | }, |
| 231 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 232 | {{74, 52, 55}, {} }, |
| 233 | {{74, 48, 51}, {} }, |
| 234 | {{74, 48, 51}, {} }, |
| 235 | {{74, 44, 47}, {} }, |
| 236 | {{74, 40, 43}, {} }, |
| 237 | }, |
| 238 | }; |
| 239 | |
| 240 | static const struct cpr3_fuse_param |
| 241 | msm8996_hmss_redun_init_voltage_param[2][MSM8996_HMSS_FUSE_CORNERS][3] = { |
| 242 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 243 | {{76, 58, 63}, {} }, |
| 244 | {{76, 52, 57}, {} }, |
| 245 | {{76, 52, 57}, {} }, |
| 246 | {{76, 46, 51}, {} }, |
| 247 | {{76, 40, 45}, {} }, |
| 248 | }, |
| 249 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 250 | {{75, 10, 15}, {} }, |
| 251 | {{75, 4, 9}, {} }, |
| 252 | {{75, 4, 9}, {} }, |
| 253 | {{74, 62, 63}, {75, 0, 3}, {} }, |
| 254 | {{74, 56, 61}, {} }, |
| 255 | }, |
| 256 | }; |
| 257 | |
| 258 | static const struct cpr3_fuse_param |
| 259 | msm8996_hmss_redun_target_quot_param[2][MSM8996_HMSS_FUSE_CORNERS][2] = { |
| 260 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 261 | {{77, 36, 47}, {} }, |
| 262 | {{77, 24, 35}, {} }, |
| 263 | {{77, 24, 35}, {} }, |
| 264 | {{77, 12, 23}, {} }, |
| 265 | {{77, 0, 11}, {} }, |
| 266 | }, |
| 267 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 268 | {{75, 52, 63}, {} }, |
| 269 | {{75, 40, 51}, {} }, |
| 270 | {{75, 40, 51}, {} }, |
| 271 | {{75, 28, 39}, {} }, |
| 272 | {{75, 16, 27}, {} }, |
| 273 | }, |
| 274 | }; |
| 275 | |
| 276 | static const struct cpr3_fuse_param |
| 277 | msm8996_hmss_redun_quot_offset_param[2][MSM8996_HMSS_FUSE_CORNERS][2] = { |
| 278 | [MSM8996_HMSS_POWER_CLUSTER_THREAD_ID] = { |
| 279 | {{} }, |
| 280 | {{} }, |
| 281 | {{68, 11, 18}, {} }, |
| 282 | {{77, 56, 63}, {} }, |
| 283 | {{77, 48, 55}, {} }, |
| 284 | }, |
| 285 | [MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID] = { |
| 286 | {{} }, |
| 287 | {{} }, |
| 288 | {{76, 16, 23}, {} }, |
| 289 | {{76, 8, 15}, {} }, |
| 290 | {{76, 0, 7}, {} }, |
| 291 | }, |
| 292 | }; |
| 293 | |
| 294 | static const struct cpr3_fuse_param msm8996_cpr_fusing_rev_param[] = { |
| 295 | {39, 51, 53}, |
| 296 | {}, |
| 297 | }; |
| 298 | |
| 299 | static const struct cpr3_fuse_param msm8996_hmss_speed_bin_param[] = { |
| 300 | {38, 29, 31}, |
| 301 | {}, |
| 302 | }; |
| 303 | |
| 304 | static const struct cpr3_fuse_param msm8996_cpr_limitation_param[] = { |
| 305 | {41, 31, 32}, |
| 306 | {}, |
| 307 | }; |
| 308 | |
| 309 | static const struct cpr3_fuse_param msm8996_vdd_mx_ret_param[] = { |
| 310 | {41, 2, 4}, |
| 311 | {}, |
| 312 | }; |
| 313 | |
| 314 | static const struct cpr3_fuse_param msm8996_vdd_apcc_ret_param[] = { |
| 315 | {41, 52, 54}, |
| 316 | {}, |
| 317 | }; |
| 318 | |
| 319 | static const struct cpr3_fuse_param msm8996_cpr_partial_binning_param[] = { |
| 320 | {39, 55, 59}, |
| 321 | {}, |
| 322 | }; |
| 323 | |
| 324 | static const struct cpr3_fuse_param |
| 325 | msm8996_hmss_aging_init_quot_diff_param[] = { |
| 326 | {68, 14, 19}, |
| 327 | {}, |
| 328 | }; |
| 329 | |
| 330 | static const struct cpr3_fuse_param |
| 331 | msm8996pro_hmss_voltage_offset_param[MSM8996_HMSS_FUSE_CORNERS][4] = { |
| 332 | {{68, 50, 52}, {41, 63, 63}, {} }, |
| 333 | {{62, 30, 31}, {62, 63, 63}, {66, 45, 45}, {} }, |
| 334 | {{61, 35, 36}, {61, 62, 63}, {} }, |
| 335 | {{61, 26, 26}, {61, 32, 34}, {} }, |
| 336 | {{61, 22, 25}, {} }, |
| 337 | }; |
| 338 | |
| 339 | #define MSM8996PRO_SOC_ID 4 |
| 340 | |
| 341 | /* |
| 342 | * Some initial msm8996 parts cannot be used in a meaningful way by software. |
| 343 | * Other parts can only be used when operating with CPR disabled (i.e. at the |
| 344 | * fused open-loop voltage) when no voltage interpolation is applied. A fuse |
| 345 | * parameter is provided so that software can properly handle these limitations. |
| 346 | */ |
| 347 | enum msm8996_cpr_limitation { |
| 348 | MSM8996_CPR_LIMITATION_NONE = 0, |
| 349 | MSM8996_CPR_LIMITATION_UNSUPPORTED = 2, |
| 350 | MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION = 3, |
| 351 | }; |
| 352 | |
| 353 | /* |
| 354 | * Some initial msm8996 parts cannot be operated at low voltages. A fuse |
| 355 | * parameter is provided so that software can properly handle these limitations. |
| 356 | */ |
| 357 | enum msm8996_cpr_partial_binning { |
| 358 | MSM8996_CPR_PARTIAL_BINNING_SVS = 11, |
| 359 | MSM8996_CPR_PARTIAL_BINNING_NOM = 12, |
| 360 | }; |
| 361 | |
| 362 | /* Additional MSM8996 specific data: */ |
| 363 | |
| 364 | /* Open loop voltage fuse reference voltages in microvolts for MSM8996 v1/v2 */ |
| 365 | static const int msm8996_v1_v2_hmss_fuse_ref_volt[MSM8996_HMSS_FUSE_CORNERS] = { |
| 366 | 605000, |
| 367 | 745000, /* Place holder entry for LowSVS */ |
| 368 | 745000, |
| 369 | 905000, |
| 370 | 1015000, |
| 371 | }; |
| 372 | |
| 373 | /* Open loop voltage fuse reference voltages in microvolts for MSM8996 v3 */ |
| 374 | static const int msm8996_v3_hmss_fuse_ref_volt[MSM8996_HMSS_FUSE_CORNERS] = { |
| 375 | 605000, |
| 376 | 745000, /* Place holder entry for LowSVS */ |
| 377 | 745000, |
| 378 | 905000, |
| 379 | 1140000, |
| 380 | }; |
| 381 | |
| 382 | /* |
| 383 | * Open loop voltage fuse reference voltages in microvolts for MSM8996 v3 with |
| 384 | * speed_bin == 1 and cpr_fusing_rev >= 5. |
| 385 | */ |
| 386 | static const int msm8996_v3_speed_bin1_rev5_hmss_fuse_ref_volt[ |
| 387 | MSM8996_HMSS_FUSE_CORNERS] = { |
| 388 | 605000, |
| 389 | 745000, /* Place holder entry for LowSVS */ |
| 390 | 745000, |
| 391 | 905000, |
| 392 | 1040000, |
| 393 | }; |
| 394 | |
| 395 | /* Defines mapping from retention fuse values to voltages in microvolts */ |
| 396 | static const int msm8996_vdd_apcc_fuse_ret_volt[] = { |
| 397 | 600000, 550000, 500000, 450000, 400000, 350000, 300000, 600000, |
| 398 | }; |
| 399 | |
| 400 | static const int msm8996_vdd_mx_fuse_ret_volt[] = { |
| 401 | 700000, 650000, 580000, 550000, 490000, 490000, 490000, 490000, |
| 402 | }; |
| 403 | |
| 404 | #define MSM8996_HMSS_FUSE_STEP_VOLT 10000 |
| 405 | #define MSM8996_HMSS_VOLTAGE_FUSE_SIZE 6 |
| 406 | #define MSM8996PRO_HMSS_CBF_FUSE_STEP_VOLT 10000 |
| 407 | #define MSM8996PRO_HMSS_CBF_VOLTAGE_FUSE_SIZE 4 |
| 408 | #define MSM8996_HMSS_QUOT_OFFSET_SCALE 5 |
| 409 | #define MSM8996_HMSS_AGING_INIT_QUOT_DIFF_SCALE 2 |
| 410 | #define MSM8996_HMSS_AGING_INIT_QUOT_DIFF_SIZE 6 |
| 411 | |
| 412 | #define MSM8996_HMSS_CPR_SENSOR_COUNT 25 |
| 413 | #define MSM8996_HMSS_THREAD0_SENSOR_MIN 0 |
| 414 | #define MSM8996_HMSS_THREAD0_SENSOR_MAX 14 |
| 415 | #define MSM8996_HMSS_THREAD1_SENSOR_MIN 15 |
| 416 | #define MSM8996_HMSS_THREAD1_SENSOR_MAX 24 |
| 417 | |
| 418 | #define MSM8996_HMSS_CPR_CLOCK_RATE 19200000 |
| 419 | |
| 420 | #define MSM8996_HMSS_AGING_SENSOR_ID 11 |
| 421 | #define MSM8996_HMSS_AGING_BYPASS_MASK0 (GENMASK(7, 0) & ~BIT(3)) |
| 422 | |
| 423 | /** |
| 424 | * cpr3_msm8996_hmss_use_voltage_offset_fuse() - return if this part utilizes |
| 425 | * voltage offset fuses or not |
| 426 | * @vreg: Pointer to the CPR3 regulator |
| 427 | * |
| 428 | * Return: true if this part utilizes voltage offset fuses, else false |
| 429 | */ |
| 430 | static inline bool cpr3_msm8996_hmss_use_voltage_offset_fuse( |
| 431 | struct cpr3_regulator *vreg) |
| 432 | { |
| 433 | struct cpr3_msm8996_hmss_fuses *fuse = vreg->platform_fuses; |
| 434 | |
| 435 | return vreg->thread->ctrl->soc_revision == MSM8996PRO_SOC_ID |
| 436 | && fuse->cpr_fusing_rev >= 1 |
| 437 | && of_property_read_bool(vreg->of_node, "qcom,is-cbf-regulator"); |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * cpr3_msm8996_hmss_read_fuse_data() - load HMSS specific fuse parameter values |
| 442 | * @vreg: Pointer to the CPR3 regulator |
| 443 | * |
| 444 | * This function allocates a cpr3_msm8996_hmss_fuses struct, fills it with |
| 445 | * values read out of hardware fuses, and finally copies common fuse values |
| 446 | * into the CPR3 regulator struct. |
| 447 | * |
| 448 | * Return: 0 on success, errno on failure |
| 449 | */ |
| 450 | static int cpr3_msm8996_hmss_read_fuse_data(struct cpr3_regulator *vreg) |
| 451 | { |
| 452 | void __iomem *base = vreg->thread->ctrl->fuse_base; |
| 453 | struct cpr3_msm8996_hmss_fuses *fuse; |
| 454 | bool redundant; |
| 455 | int i, id, rc; |
| 456 | |
| 457 | fuse = devm_kzalloc(vreg->thread->ctrl->dev, sizeof(*fuse), GFP_KERNEL); |
| 458 | if (!fuse) |
| 459 | return -ENOMEM; |
| 460 | |
| 461 | rc = cpr3_read_fuse_param(base, msm8996_hmss_speed_bin_param, |
| 462 | &fuse->speed_bin); |
| 463 | if (rc) { |
| 464 | cpr3_err(vreg, "Unable to read speed bin fuse, rc=%d\n", rc); |
| 465 | return rc; |
| 466 | } |
| 467 | cpr3_info(vreg, "speed bin = %llu\n", fuse->speed_bin); |
| 468 | |
| 469 | rc = cpr3_read_fuse_param(base, msm8996_cpr_fusing_rev_param, |
| 470 | &fuse->cpr_fusing_rev); |
| 471 | if (rc) { |
| 472 | cpr3_err(vreg, "Unable to read CPR fusing revision fuse, rc=%d\n", |
| 473 | rc); |
| 474 | return rc; |
| 475 | } |
| 476 | cpr3_info(vreg, "CPR fusing revision = %llu\n", fuse->cpr_fusing_rev); |
| 477 | |
| 478 | rc = cpr3_read_fuse_param(base, msm8996_redundant_fusing_param, |
| 479 | &fuse->redundant_fusing); |
| 480 | if (rc) { |
| 481 | cpr3_err(vreg, "Unable to read redundant fusing config fuse, rc=%d\n", |
| 482 | rc); |
| 483 | return rc; |
| 484 | } |
| 485 | |
| 486 | redundant = (fuse->redundant_fusing == MSM8996_CPR_REDUNDANT_FUSING); |
| 487 | cpr3_info(vreg, "using redundant fuses = %c\n", |
| 488 | redundant ? 'Y' : 'N'); |
| 489 | |
| 490 | rc = cpr3_read_fuse_param(base, msm8996_cpr_limitation_param, |
| 491 | &fuse->limitation); |
| 492 | if (rc) { |
| 493 | cpr3_err(vreg, "Unable to read CPR limitation fuse, rc=%d\n", |
| 494 | rc); |
| 495 | return rc; |
| 496 | } |
| 497 | cpr3_info(vreg, "CPR limitation = %s\n", |
| 498 | fuse->limitation == MSM8996_CPR_LIMITATION_UNSUPPORTED |
| 499 | ? "unsupported chip" : fuse->limitation |
| 500 | == MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION |
| 501 | ? "CPR disabled and no interpolation" : "none"); |
| 502 | |
| 503 | rc = cpr3_read_fuse_param(base, msm8996_cpr_partial_binning_param, |
| 504 | &fuse->partial_binning); |
| 505 | if (rc) { |
| 506 | cpr3_err(vreg, "Unable to read partial binning fuse, rc=%d\n", |
| 507 | rc); |
| 508 | return rc; |
| 509 | } |
| 510 | cpr3_info(vreg, "CPR partial binning limitation = %s\n", |
| 511 | fuse->partial_binning == MSM8996_CPR_PARTIAL_BINNING_SVS |
| 512 | ? "SVS min voltage" |
| 513 | : fuse->partial_binning == MSM8996_CPR_PARTIAL_BINNING_NOM |
| 514 | ? "NOM min voltage" |
| 515 | : "none"); |
| 516 | |
| 517 | rc = cpr3_read_fuse_param(base, msm8996_vdd_mx_ret_param, |
| 518 | &fuse->vdd_mx_ret_fuse); |
| 519 | if (rc) { |
| 520 | cpr3_err(vreg, "Unable to read VDD_MX retention fuse, rc=%d\n", |
| 521 | rc); |
| 522 | return rc; |
| 523 | } |
| 524 | |
| 525 | rc = cpr3_read_fuse_param(base, msm8996_vdd_apcc_ret_param, |
| 526 | &fuse->vdd_apcc_ret_fuse); |
| 527 | if (rc) { |
| 528 | cpr3_err(vreg, "Unable to read VDD_APCC retention fuse, rc=%d\n", |
| 529 | rc); |
| 530 | return rc; |
| 531 | } |
| 532 | |
| 533 | cpr3_info(vreg, "Retention voltage fuses: VDD_MX = %llu, VDD_APCC = %llu\n", |
| 534 | fuse->vdd_mx_ret_fuse, fuse->vdd_apcc_ret_fuse); |
| 535 | |
| 536 | rc = cpr3_read_fuse_param(base, msm8996_hmss_aging_init_quot_diff_param, |
| 537 | &fuse->aging_init_quot_diff); |
| 538 | if (rc) { |
| 539 | cpr3_err(vreg, "Unable to read aging initial quotient difference fuse, rc=%d\n", |
| 540 | rc); |
| 541 | return rc; |
| 542 | } |
| 543 | |
| 544 | id = vreg->thread->thread_id; |
| 545 | |
| 546 | for (i = 0; i < MSM8996_HMSS_FUSE_CORNERS; i++) { |
| 547 | rc = cpr3_read_fuse_param(base, |
| 548 | redundant |
| 549 | ? msm8996_hmss_redun_init_voltage_param[id][i] |
| 550 | : msm8996_hmss_init_voltage_param[id][i], |
| 551 | &fuse->init_voltage[i]); |
| 552 | if (rc) { |
| 553 | cpr3_err(vreg, "Unable to read fuse-corner %d initial voltage fuse, rc=%d\n", |
| 554 | i, rc); |
| 555 | return rc; |
| 556 | } |
| 557 | |
| 558 | rc = cpr3_read_fuse_param(base, |
| 559 | redundant |
| 560 | ? msm8996_hmss_redun_target_quot_param[id][i] |
| 561 | : msm8996_hmss_target_quot_param[id][i], |
| 562 | &fuse->target_quot[i]); |
| 563 | if (rc) { |
| 564 | cpr3_err(vreg, "Unable to read fuse-corner %d target quotient fuse, rc=%d\n", |
| 565 | i, rc); |
| 566 | return rc; |
| 567 | } |
| 568 | |
| 569 | rc = cpr3_read_fuse_param(base, |
| 570 | redundant |
| 571 | ? msm8996_hmss_redun_ro_sel_param[id][i] |
| 572 | : msm8996_hmss_ro_sel_param[id][i], |
| 573 | &fuse->ro_sel[i]); |
| 574 | if (rc) { |
| 575 | cpr3_err(vreg, "Unable to read fuse-corner %d RO select fuse, rc=%d\n", |
| 576 | i, rc); |
| 577 | return rc; |
| 578 | } |
| 579 | |
| 580 | rc = cpr3_read_fuse_param(base, |
| 581 | redundant |
| 582 | ? msm8996_hmss_redun_quot_offset_param[id][i] |
| 583 | : msm8996_hmss_quot_offset_param[id][i], |
| 584 | &fuse->quot_offset[i]); |
| 585 | if (rc) { |
| 586 | cpr3_err(vreg, "Unable to read fuse-corner %d quotient offset fuse, rc=%d\n", |
| 587 | i, rc); |
| 588 | return rc; |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | vreg->fuse_combo = fuse->cpr_fusing_rev + 8 * fuse->speed_bin; |
| 593 | if (vreg->fuse_combo >= CPR3_MSM8996_HMSS_FUSE_COMBO_COUNT) { |
| 594 | cpr3_err(vreg, "invalid CPR fuse combo = %d found\n", |
| 595 | vreg->fuse_combo); |
| 596 | return -EINVAL; |
| 597 | } |
| 598 | |
| 599 | vreg->speed_bin_fuse = fuse->speed_bin; |
| 600 | vreg->cpr_rev_fuse = fuse->cpr_fusing_rev; |
| 601 | vreg->fuse_corner_count = MSM8996_HMSS_FUSE_CORNERS; |
| 602 | vreg->platform_fuses = fuse; |
| 603 | |
| 604 | if (cpr3_msm8996_hmss_use_voltage_offset_fuse(vreg)) { |
| 605 | for (i = 0; i < MSM8996_HMSS_FUSE_CORNERS; i++) { |
| 606 | rc = cpr3_read_fuse_param(base, |
| 607 | msm8996pro_hmss_voltage_offset_param[i], |
| 608 | &fuse->cbf_voltage_offset[i]); |
| 609 | if (rc) { |
| 610 | cpr3_err(vreg, "Unable to read fuse-corner %d CBF voltage offset fuse, rc=%d\n", |
| 611 | i, rc); |
| 612 | return rc; |
| 613 | } |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | /** |
| 621 | * cpr3_hmss_apply_fused_voltage_offset() - adjust the fused voltages for each |
| 622 | * fuse corner according to voltage offset fuse values |
| 623 | * @vreg: Pointer to the CPR3 regulator |
| 624 | * @fuse_volt: Pointer to an array of the fused voltage values; must |
| 625 | * have length equal to vreg->fuse_corner_count |
| 626 | * |
| 627 | * Voltage values in fuse_volt are modified in place. |
| 628 | * |
| 629 | * Return: 0 on success, errno on failure |
| 630 | */ |
| 631 | static int cpr3_hmss_apply_fused_voltage_offset(struct cpr3_regulator *vreg, |
| 632 | int *fuse_volt) |
| 633 | { |
| 634 | struct cpr3_msm8996_hmss_fuses *fuse = vreg->platform_fuses; |
| 635 | int i; |
| 636 | |
| 637 | if (!cpr3_msm8996_hmss_use_voltage_offset_fuse(vreg)) |
| 638 | return 0; |
| 639 | |
| 640 | for (i = 0; i < vreg->fuse_corner_count; i++) |
| 641 | fuse_volt[i] += cpr3_convert_open_loop_voltage_fuse( |
| 642 | 0, |
| 643 | MSM8996PRO_HMSS_CBF_FUSE_STEP_VOLT, |
| 644 | fuse->cbf_voltage_offset[i], |
| 645 | MSM8996PRO_HMSS_CBF_VOLTAGE_FUSE_SIZE); |
| 646 | |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * cpr3_hmss_parse_corner_data() - parse HMSS corner data from device tree |
| 652 | * properties of the CPR3 regulator's device node |
| 653 | * @vreg: Pointer to the CPR3 regulator |
| 654 | * |
| 655 | * Return: 0 on success, errno on failure |
| 656 | */ |
| 657 | static int cpr3_hmss_parse_corner_data(struct cpr3_regulator *vreg) |
| 658 | { |
| 659 | int rc; |
| 660 | |
| 661 | rc = cpr3_parse_common_corner_data(vreg); |
| 662 | if (rc) { |
| 663 | cpr3_err(vreg, "error reading corner data, rc=%d\n", rc); |
| 664 | return rc; |
| 665 | } |
| 666 | |
| 667 | return rc; |
| 668 | } |
| 669 | |
| 670 | /** |
| 671 | * cpr3_msm8996_hmss_calculate_open_loop_voltages() - calculate the open-loop |
| 672 | * voltage for each corner of a CPR3 regulator |
| 673 | * @vreg: Pointer to the CPR3 regulator |
| 674 | * |
| 675 | * If open-loop voltage interpolation is allowed in both device tree and in |
| 676 | * hardware fuses, then this function calculates the open-loop voltage for a |
| 677 | * given corner using linear interpolation. This interpolation is performed |
| 678 | * using the processor frequencies of the lower and higher Fmax corners along |
| 679 | * with their fused open-loop voltages. |
| 680 | * |
| 681 | * If open-loop voltage interpolation is not allowed, then this function uses |
| 682 | * the Fmax fused open-loop voltage for all of the corners associated with a |
| 683 | * given fuse corner. |
| 684 | * |
| 685 | * Return: 0 on success, errno on failure |
| 686 | */ |
| 687 | static int cpr3_msm8996_hmss_calculate_open_loop_voltages( |
| 688 | struct cpr3_regulator *vreg) |
| 689 | { |
| 690 | struct device_node *node = vreg->of_node; |
| 691 | struct cpr3_msm8996_hmss_fuses *fuse = vreg->platform_fuses; |
| 692 | int rc = 0; |
| 693 | bool allow_interpolation; |
| 694 | u64 freq_low, volt_low, freq_high, volt_high; |
| 695 | int i, j, soc_revision; |
| 696 | const int *ref_volt; |
| 697 | int *fuse_volt; |
| 698 | int *fmax_corner; |
| 699 | |
| 700 | fuse_volt = kcalloc(vreg->fuse_corner_count, sizeof(*fuse_volt), |
| 701 | GFP_KERNEL); |
| 702 | fmax_corner = kcalloc(vreg->fuse_corner_count, sizeof(*fmax_corner), |
| 703 | GFP_KERNEL); |
| 704 | if (!fuse_volt || !fmax_corner) { |
| 705 | rc = -ENOMEM; |
| 706 | goto done; |
| 707 | } |
| 708 | |
| 709 | soc_revision = vreg->thread->ctrl->soc_revision; |
| 710 | if (soc_revision == 1 || soc_revision == 2) |
| 711 | ref_volt = msm8996_v1_v2_hmss_fuse_ref_volt; |
| 712 | else if (soc_revision == 3 && fuse->speed_bin == 1 |
| 713 | && fuse->cpr_fusing_rev >= 5) |
| 714 | ref_volt = msm8996_v3_speed_bin1_rev5_hmss_fuse_ref_volt; |
| 715 | else |
| 716 | ref_volt = msm8996_v3_hmss_fuse_ref_volt; |
| 717 | |
| 718 | for (i = 0; i < vreg->fuse_corner_count; i++) { |
| 719 | fuse_volt[i] = cpr3_convert_open_loop_voltage_fuse( |
| 720 | ref_volt[i], |
| 721 | MSM8996_HMSS_FUSE_STEP_VOLT, fuse->init_voltage[i], |
| 722 | MSM8996_HMSS_VOLTAGE_FUSE_SIZE); |
| 723 | |
| 724 | /* Log fused open-loop voltage values for debugging purposes. */ |
| 725 | if (i != CPR3_MSM8996_HMSS_FUSE_CORNER_LOWSVS) |
| 726 | cpr3_info(vreg, "fused %6s: open-loop=%7d uV\n", |
| 727 | cpr3_msm8996_hmss_fuse_corner_name[i], |
| 728 | fuse_volt[i]); |
| 729 | } |
| 730 | |
| 731 | if (cpr3_msm8996_hmss_use_voltage_offset_fuse(vreg)) { |
| 732 | rc = cpr3_hmss_apply_fused_voltage_offset(vreg, fuse_volt); |
| 733 | if (rc) { |
| 734 | cpr3_err(vreg, "could not apply CBF voltage offsets, rc=%d\n", |
| 735 | rc); |
| 736 | goto done; |
| 737 | } |
| 738 | |
| 739 | for (i = 0; i < vreg->fuse_corner_count; i++) |
| 740 | cpr3_info(vreg, "fused %6s: CBF offset open-loop=%7d uV\n", |
| 741 | cpr3_msm8996_hmss_fuse_corner_name[i], |
| 742 | fuse_volt[i]); |
| 743 | } |
| 744 | |
| 745 | rc = cpr3_adjust_fused_open_loop_voltages(vreg, fuse_volt); |
| 746 | if (rc) { |
| 747 | cpr3_err(vreg, "fused open-loop voltage adjustment failed, rc=%d\n", |
| 748 | rc); |
| 749 | goto done; |
| 750 | } |
| 751 | |
| 752 | allow_interpolation = of_property_read_bool(node, |
| 753 | "qcom,allow-voltage-interpolation"); |
| 754 | |
| 755 | /* |
| 756 | * No LowSVS open-loop voltage fuse exists. Instead, intermediate |
| 757 | * voltages are interpolated between MinSVS and SVS. Set the LowSVS |
| 758 | * voltage to be equal to the adjusted SVS voltage in order to avoid |
| 759 | * triggering an incorrect condition violation in the following loop. |
| 760 | */ |
| 761 | fuse_volt[CPR3_MSM8996_HMSS_FUSE_CORNER_LOWSVS] |
| 762 | = fuse_volt[CPR3_MSM8996_HMSS_FUSE_CORNER_SVS]; |
| 763 | |
| 764 | for (i = 1; i < vreg->fuse_corner_count; i++) { |
| 765 | if (fuse_volt[i] < fuse_volt[i - 1]) { |
| 766 | cpr3_debug(vreg, "fuse corner %d voltage=%d uV < fuse corner %d voltage=%d uV; overriding: fuse corner %d voltage=%d\n", |
| 767 | i, fuse_volt[i], i - 1, fuse_volt[i - 1], |
| 768 | i, fuse_volt[i - 1]); |
| 769 | fuse_volt[i] = fuse_volt[i - 1]; |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | if (fuse->limitation == MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION) |
| 774 | allow_interpolation = false; |
| 775 | |
| 776 | if (!allow_interpolation) { |
| 777 | /* Use fused open-loop voltage for lower frequencies. */ |
| 778 | for (i = 0; i < vreg->corner_count; i++) |
| 779 | vreg->corner[i].open_loop_volt |
| 780 | = fuse_volt[vreg->corner[i].cpr_fuse_corner]; |
| 781 | goto done; |
| 782 | } |
| 783 | |
| 784 | for (i = 0; i < vreg->fuse_corner_count; i++) |
| 785 | fmax_corner[i] = vreg->fuse_corner_map[i]; |
| 786 | |
| 787 | /* |
| 788 | * Interpolation is not possible for corners mapped to the lowest fuse |
| 789 | * corner so use the fuse corner value directly. |
| 790 | */ |
| 791 | for (i = 0; i <= fmax_corner[0]; i++) |
| 792 | vreg->corner[i].open_loop_volt = fuse_volt[0]; |
| 793 | |
| 794 | /* |
| 795 | * Interpolation is not possible for corners mapped above the highest |
| 796 | * fuse corner so use the fuse corner value directly. |
| 797 | */ |
| 798 | j = vreg->fuse_corner_count - 1; |
| 799 | for (i = fmax_corner[j] + 1; i < vreg->corner_count; i++) |
| 800 | vreg->corner[i].open_loop_volt = fuse_volt[j]; |
| 801 | |
| 802 | /* |
| 803 | * Corner LowSVS should be skipped for voltage interpolation |
| 804 | * since no fuse exists for it. Instead, the lowest interpolation |
| 805 | * should be between MinSVS and SVS. |
| 806 | */ |
| 807 | for (i = CPR3_MSM8996_HMSS_FUSE_CORNER_LOWSVS; |
| 808 | i < vreg->fuse_corner_count - 1; i++) { |
| 809 | fmax_corner[i] = fmax_corner[i + 1]; |
| 810 | fuse_volt[i] = fuse_volt[i + 1]; |
| 811 | } |
| 812 | |
| 813 | /* Interpolate voltages for the higher fuse corners. */ |
| 814 | for (i = 1; i < vreg->fuse_corner_count - 1; i++) { |
| 815 | freq_low = vreg->corner[fmax_corner[i - 1]].proc_freq; |
| 816 | volt_low = fuse_volt[i - 1]; |
| 817 | freq_high = vreg->corner[fmax_corner[i]].proc_freq; |
| 818 | volt_high = fuse_volt[i]; |
| 819 | |
| 820 | for (j = fmax_corner[i - 1] + 1; j <= fmax_corner[i]; j++) |
| 821 | vreg->corner[j].open_loop_volt = cpr3_interpolate( |
| 822 | freq_low, volt_low, freq_high, volt_high, |
| 823 | vreg->corner[j].proc_freq); |
| 824 | } |
| 825 | |
| 826 | done: |
| 827 | if (rc == 0) { |
| 828 | cpr3_debug(vreg, "unadjusted per-corner open-loop voltages:\n"); |
| 829 | for (i = 0; i < vreg->corner_count; i++) |
| 830 | cpr3_debug(vreg, "open-loop[%2d] = %d uV\n", i, |
| 831 | vreg->corner[i].open_loop_volt); |
| 832 | |
| 833 | rc = cpr3_adjust_open_loop_voltages(vreg); |
| 834 | if (rc) |
| 835 | cpr3_err(vreg, "open-loop voltage adjustment failed, rc=%d\n", |
| 836 | rc); |
| 837 | } |
| 838 | |
| 839 | kfree(fuse_volt); |
| 840 | kfree(fmax_corner); |
| 841 | return rc; |
| 842 | } |
| 843 | |
| 844 | /** |
| 845 | * cpr3_msm8996_hmss_set_no_interpolation_quotients() - use the fused target |
| 846 | * quotient values for lower frequencies. |
| 847 | * @vreg: Pointer to the CPR3 regulator |
| 848 | * @volt_adjust: Pointer to array of per-corner closed-loop adjustment |
| 849 | * voltages |
| 850 | * @volt_adjust_fuse: Pointer to array of per-fuse-corner closed-loop |
| 851 | * adjustment voltages |
| 852 | * @ro_scale: Pointer to array of per-fuse-corner RO scaling factor |
| 853 | * values with units of QUOT/V |
| 854 | * |
| 855 | * Return: 0 on success, errno on failure |
| 856 | */ |
| 857 | static int cpr3_msm8996_hmss_set_no_interpolation_quotients( |
| 858 | struct cpr3_regulator *vreg, int *volt_adjust, |
| 859 | int *volt_adjust_fuse, int *ro_scale) |
| 860 | { |
| 861 | struct cpr3_msm8996_hmss_fuses *fuse = vreg->platform_fuses; |
| 862 | u32 quot, ro; |
| 863 | int quot_adjust; |
| 864 | int i, fuse_corner; |
| 865 | |
| 866 | for (i = 0; i < vreg->corner_count; i++) { |
| 867 | fuse_corner = vreg->corner[i].cpr_fuse_corner; |
| 868 | quot = fuse->target_quot[fuse_corner]; |
| 869 | quot_adjust = cpr3_quot_adjustment(ro_scale[fuse_corner], |
| 870 | volt_adjust_fuse[fuse_corner] + volt_adjust[i]); |
| 871 | ro = fuse->ro_sel[fuse_corner]; |
| 872 | vreg->corner[i].target_quot[ro] = quot + quot_adjust; |
| 873 | if (quot_adjust) |
| 874 | cpr3_debug(vreg, "adjusted corner %d RO%u target quot: %u --> %u (%d uV)\n", |
| 875 | i, ro, quot, vreg->corner[i].target_quot[ro], |
| 876 | volt_adjust_fuse[fuse_corner] + volt_adjust[i]); |
| 877 | } |
| 878 | |
| 879 | return 0; |
| 880 | } |
| 881 | |
| 882 | /** |
| 883 | * cpr3_msm8996_hmss_calculate_target_quotients() - calculate the CPR target |
| 884 | * quotient for each corner of a CPR3 regulator |
| 885 | * @vreg: Pointer to the CPR3 regulator |
| 886 | * |
| 887 | * If target quotient interpolation is allowed in both device tree and in |
| 888 | * hardware fuses, then this function calculates the target quotient for a |
| 889 | * given corner using linear interpolation. This interpolation is performed |
| 890 | * using the processor frequencies of the lower and higher Fmax corners along |
| 891 | * with the fused target quotient and quotient offset of the higher Fmax corner. |
| 892 | * |
| 893 | * If target quotient interpolation is not allowed, then this function uses |
| 894 | * the Fmax fused target quotient for all of the corners associated with a |
| 895 | * given fuse corner. |
| 896 | * |
| 897 | * Return: 0 on success, errno on failure |
| 898 | */ |
| 899 | static int cpr3_msm8996_hmss_calculate_target_quotients( |
| 900 | struct cpr3_regulator *vreg) |
| 901 | { |
| 902 | struct cpr3_msm8996_hmss_fuses *fuse = vreg->platform_fuses; |
| 903 | int rc; |
| 904 | bool allow_interpolation; |
| 905 | u64 freq_low, freq_high, prev_quot; |
| 906 | u64 *quot_low; |
| 907 | u64 *quot_high; |
| 908 | u32 quot, ro; |
| 909 | int i, j, fuse_corner, quot_adjust; |
| 910 | int *fmax_corner; |
| 911 | int *volt_adjust, *volt_adjust_fuse, *ro_scale; |
| 912 | |
| 913 | /* Log fused quotient values for debugging purposes. */ |
| 914 | cpr3_info(vreg, "fused MinSVS: quot[%2llu]=%4llu\n", |
| 915 | fuse->ro_sel[CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS], |
| 916 | fuse->target_quot[CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS]); |
| 917 | for (i = CPR3_MSM8996_HMSS_FUSE_CORNER_SVS; |
| 918 | i <= CPR3_MSM8996_HMSS_FUSE_CORNER_TURBO; i++) |
| 919 | cpr3_info(vreg, "fused %6s: quot[%2llu]=%4llu, quot_offset[%2llu]=%4llu\n", |
| 920 | cpr3_msm8996_hmss_fuse_corner_name[i], |
| 921 | fuse->ro_sel[i], fuse->target_quot[i], fuse->ro_sel[i], |
| 922 | fuse->quot_offset[i] * MSM8996_HMSS_QUOT_OFFSET_SCALE); |
| 923 | |
| 924 | allow_interpolation = of_property_read_bool(vreg->of_node, |
| 925 | "qcom,allow-quotient-interpolation"); |
| 926 | |
| 927 | if (fuse->limitation == MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION) |
| 928 | allow_interpolation = false; |
| 929 | |
| 930 | volt_adjust = kcalloc(vreg->corner_count, sizeof(*volt_adjust), |
| 931 | GFP_KERNEL); |
| 932 | volt_adjust_fuse = kcalloc(vreg->fuse_corner_count, |
| 933 | sizeof(*volt_adjust_fuse), GFP_KERNEL); |
| 934 | ro_scale = kcalloc(vreg->fuse_corner_count, sizeof(*ro_scale), |
| 935 | GFP_KERNEL); |
| 936 | fmax_corner = kcalloc(vreg->fuse_corner_count, sizeof(*fmax_corner), |
| 937 | GFP_KERNEL); |
| 938 | quot_low = kcalloc(vreg->fuse_corner_count, sizeof(*quot_low), |
| 939 | GFP_KERNEL); |
| 940 | quot_high = kcalloc(vreg->fuse_corner_count, sizeof(*quot_high), |
| 941 | GFP_KERNEL); |
| 942 | if (!volt_adjust || !volt_adjust_fuse || !ro_scale || |
| 943 | !fmax_corner || !quot_low || !quot_high) { |
| 944 | rc = -ENOMEM; |
| 945 | goto done; |
| 946 | } |
| 947 | |
| 948 | rc = cpr3_parse_closed_loop_voltage_adjustments(vreg, &fuse->ro_sel[0], |
| 949 | volt_adjust, volt_adjust_fuse, ro_scale); |
| 950 | if (rc) { |
| 951 | cpr3_err(vreg, "could not load closed-loop voltage adjustments, rc=%d\n", |
| 952 | rc); |
| 953 | goto done; |
| 954 | } |
| 955 | |
| 956 | rc = cpr3_hmss_apply_fused_voltage_offset(vreg, volt_adjust_fuse); |
| 957 | if (rc) { |
| 958 | cpr3_err(vreg, "could not apply CBF voltage offsets, rc=%d\n", |
| 959 | rc); |
| 960 | goto done; |
| 961 | } |
| 962 | |
| 963 | if (!allow_interpolation) { |
| 964 | /* Use fused target quotients for lower frequencies. */ |
| 965 | return cpr3_msm8996_hmss_set_no_interpolation_quotients(vreg, |
| 966 | volt_adjust, volt_adjust_fuse, ro_scale); |
| 967 | } |
| 968 | |
| 969 | for (i = 0; i < vreg->fuse_corner_count; i++) |
| 970 | fmax_corner[i] = vreg->fuse_corner_map[i]; |
| 971 | |
| 972 | /* |
| 973 | * Interpolation is not possible for corners mapped to the lowest fuse |
| 974 | * corner so use the fuse corner value directly. |
| 975 | */ |
| 976 | i = CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS; |
| 977 | quot_adjust = cpr3_quot_adjustment(ro_scale[i], volt_adjust_fuse[i]); |
| 978 | quot = fuse->target_quot[i] + quot_adjust; |
| 979 | quot_high[i] = quot; |
| 980 | ro = fuse->ro_sel[i]; |
| 981 | if (quot_adjust) |
| 982 | cpr3_debug(vreg, "adjusted fuse corner %d RO%u target quot: %llu --> %u (%d uV)\n", |
| 983 | i, ro, fuse->target_quot[i], quot, volt_adjust_fuse[i]); |
| 984 | for (i = 0; i <= fmax_corner[CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS]; i++) |
| 985 | vreg->corner[i].target_quot[ro] = quot; |
| 986 | |
| 987 | /* |
| 988 | * Interpolation is not possible for corners mapped above the highest |
| 989 | * fuse corner so use the fuse corner value directly. |
| 990 | */ |
| 991 | j = vreg->fuse_corner_count - 1; |
| 992 | quot_adjust = cpr3_quot_adjustment(ro_scale[j], volt_adjust_fuse[j]); |
| 993 | quot = fuse->target_quot[j] + quot_adjust; |
| 994 | ro = fuse->ro_sel[j]; |
| 995 | for (i = fmax_corner[j] + 1; i < vreg->corner_count; i++) |
| 996 | vreg->corner[i].target_quot[ro] = quot; |
| 997 | |
| 998 | /* |
| 999 | * The LowSVS target quotient is defined as: |
| 1000 | * (SVS target quotient) - (the unpacked SVS quotient offset) |
| 1001 | * MinSVS, LowSVS, and SVS fuse corners all share the same RO so it is |
| 1002 | * possible to interpolate between their target quotient values. |
| 1003 | */ |
| 1004 | i = CPR3_MSM8996_HMSS_FUSE_CORNER_LOWSVS; |
| 1005 | quot_high[i] = fuse->target_quot[CPR3_MSM8996_HMSS_FUSE_CORNER_SVS] |
| 1006 | - fuse->quot_offset[CPR3_MSM8996_HMSS_FUSE_CORNER_SVS] |
| 1007 | * MSM8996_HMSS_QUOT_OFFSET_SCALE; |
| 1008 | quot_low[i] = fuse->target_quot[CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS]; |
| 1009 | if (quot_high[i] < quot_low[i]) { |
| 1010 | cpr3_info(vreg, "quot_lowsvs=%llu < quot_minsvs=%llu; overriding: quot_lowsvs=%llu\n", |
| 1011 | quot_high[i], quot_low[i], quot_low[i]); |
| 1012 | quot_high[i] = quot_low[i]; |
| 1013 | } |
| 1014 | if (fuse->ro_sel[CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS] |
| 1015 | != fuse->ro_sel[CPR3_MSM8996_HMSS_FUSE_CORNER_SVS]) { |
| 1016 | cpr3_info(vreg, "MinSVS RO=%llu != SVS RO=%llu; disabling LowSVS interpolation\n", |
| 1017 | fuse->ro_sel[CPR3_MSM8996_HMSS_FUSE_CORNER_MINSVS], |
| 1018 | fuse->ro_sel[CPR3_MSM8996_HMSS_FUSE_CORNER_SVS]); |
| 1019 | quot_low[i] = quot_high[i]; |
| 1020 | } |
| 1021 | |
| 1022 | for (i = CPR3_MSM8996_HMSS_FUSE_CORNER_SVS; |
| 1023 | i < vreg->fuse_corner_count; i++) { |
| 1024 | quot_high[i] = fuse->target_quot[i]; |
| 1025 | if (fuse->ro_sel[i] == fuse->ro_sel[i - 1]) |
| 1026 | quot_low[i] = quot_high[i - 1]; |
| 1027 | else |
| 1028 | quot_low[i] = quot_high[i] |
| 1029 | - fuse->quot_offset[i] |
| 1030 | * MSM8996_HMSS_QUOT_OFFSET_SCALE; |
| 1031 | if (quot_high[i] < quot_low[i]) { |
| 1032 | cpr3_debug(vreg, "quot_high[%d]=%llu < quot_low[%d]=%llu; overriding: quot_high[%d]=%llu\n", |
| 1033 | i, quot_high[i], i, quot_low[i], |
| 1034 | i, quot_low[i]); |
| 1035 | quot_high[i] = quot_low[i]; |
| 1036 | } |
| 1037 | } |
| 1038 | |
| 1039 | /* Perform per-fuse-corner target quotient adjustment */ |
| 1040 | for (i = 1; i < vreg->fuse_corner_count; i++) { |
| 1041 | quot_adjust = cpr3_quot_adjustment(ro_scale[i], |
| 1042 | volt_adjust_fuse[i]); |
| 1043 | if (quot_adjust) { |
| 1044 | prev_quot = quot_high[i]; |
| 1045 | quot_high[i] += quot_adjust; |
| 1046 | cpr3_debug(vreg, "adjusted fuse corner %d RO%llu target quot: %llu --> %llu (%d uV)\n", |
| 1047 | i, fuse->ro_sel[i], prev_quot, quot_high[i], |
| 1048 | volt_adjust_fuse[i]); |
| 1049 | } |
| 1050 | |
| 1051 | if (fuse->ro_sel[i] == fuse->ro_sel[i - 1]) |
| 1052 | quot_low[i] = quot_high[i - 1]; |
| 1053 | else |
| 1054 | quot_low[i] += cpr3_quot_adjustment(ro_scale[i], |
| 1055 | volt_adjust_fuse[i - 1]); |
| 1056 | |
| 1057 | if (quot_high[i] < quot_low[i]) { |
| 1058 | cpr3_debug(vreg, "quot_high[%d]=%llu < quot_low[%d]=%llu after adjustment; overriding: quot_high[%d]=%llu\n", |
| 1059 | i, quot_high[i], i, quot_low[i], |
| 1060 | i, quot_low[i]); |
| 1061 | quot_high[i] = quot_low[i]; |
| 1062 | } |
| 1063 | } |
| 1064 | |
| 1065 | /* Interpolate voltages for the higher fuse corners. */ |
| 1066 | for (i = 1; i < vreg->fuse_corner_count; i++) { |
| 1067 | freq_low = vreg->corner[fmax_corner[i - 1]].proc_freq; |
| 1068 | freq_high = vreg->corner[fmax_corner[i]].proc_freq; |
| 1069 | |
| 1070 | ro = fuse->ro_sel[i]; |
| 1071 | for (j = fmax_corner[i - 1] + 1; j <= fmax_corner[i]; j++) |
| 1072 | vreg->corner[j].target_quot[ro] = cpr3_interpolate( |
| 1073 | freq_low, quot_low[i], freq_high, quot_high[i], |
| 1074 | vreg->corner[j].proc_freq); |
| 1075 | } |
| 1076 | |
| 1077 | /* Perform per-corner target quotient adjustment */ |
| 1078 | for (i = 0; i < vreg->corner_count; i++) { |
| 1079 | fuse_corner = vreg->corner[i].cpr_fuse_corner; |
| 1080 | ro = fuse->ro_sel[fuse_corner]; |
| 1081 | quot_adjust = cpr3_quot_adjustment(ro_scale[fuse_corner], |
| 1082 | volt_adjust[i]); |
| 1083 | if (quot_adjust) { |
| 1084 | prev_quot = vreg->corner[i].target_quot[ro]; |
| 1085 | vreg->corner[i].target_quot[ro] += quot_adjust; |
| 1086 | cpr3_debug(vreg, "adjusted corner %d RO%u target quot: %llu --> %u (%d uV)\n", |
| 1087 | i, ro, prev_quot, |
| 1088 | vreg->corner[i].target_quot[ro], |
| 1089 | volt_adjust[i]); |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | /* Ensure that target quotients increase monotonically */ |
| 1094 | for (i = 1; i < vreg->corner_count; i++) { |
| 1095 | ro = fuse->ro_sel[vreg->corner[i].cpr_fuse_corner]; |
| 1096 | if (fuse->ro_sel[vreg->corner[i - 1].cpr_fuse_corner] == ro |
| 1097 | && vreg->corner[i].target_quot[ro] |
| 1098 | < vreg->corner[i - 1].target_quot[ro]) { |
| 1099 | 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", |
| 1100 | i, ro, vreg->corner[i].target_quot[ro], |
| 1101 | i - 1, ro, vreg->corner[i - 1].target_quot[ro], |
| 1102 | i, ro, vreg->corner[i - 1].target_quot[ro]); |
| 1103 | vreg->corner[i].target_quot[ro] |
| 1104 | = vreg->corner[i - 1].target_quot[ro]; |
| 1105 | } |
| 1106 | } |
| 1107 | |
| 1108 | done: |
| 1109 | kfree(volt_adjust); |
| 1110 | kfree(volt_adjust_fuse); |
| 1111 | kfree(ro_scale); |
| 1112 | kfree(fmax_corner); |
| 1113 | kfree(quot_low); |
| 1114 | kfree(quot_high); |
| 1115 | return rc; |
| 1116 | } |
| 1117 | |
| 1118 | /** |
| 1119 | * cpr3_msm8996_partial_binning_override() - override the voltage and quotient |
| 1120 | * settings for low corners based upon the value of the partial |
| 1121 | * binning fuse |
| 1122 | * @vreg: Pointer to the CPR3 regulator |
| 1123 | * |
| 1124 | * Some parts are not able to operate at low voltages. The partial binning |
| 1125 | * fuse specifies if a given part has such limitations. |
| 1126 | * |
| 1127 | * Return: 0 on success, errno on failure |
| 1128 | */ |
| 1129 | static int cpr3_msm8996_partial_binning_override(struct cpr3_regulator *vreg) |
| 1130 | { |
| 1131 | struct cpr3_msm8996_hmss_fuses *fuse = vreg->platform_fuses; |
| 1132 | int i, fuse_corner, fmax_corner; |
| 1133 | |
| 1134 | if (fuse->partial_binning == MSM8996_CPR_PARTIAL_BINNING_SVS) |
| 1135 | fuse_corner = CPR3_MSM8996_HMSS_FUSE_CORNER_SVS; |
| 1136 | else if (fuse->partial_binning == MSM8996_CPR_PARTIAL_BINNING_NOM) |
| 1137 | fuse_corner = CPR3_MSM8996_HMSS_FUSE_CORNER_NOM; |
| 1138 | else |
| 1139 | return 0; |
| 1140 | |
| 1141 | cpr3_info(vreg, "overriding voltages and quotients for all corners below %s Fmax\n", |
| 1142 | cpr3_msm8996_hmss_fuse_corner_name[fuse_corner]); |
| 1143 | |
| 1144 | fmax_corner = -1; |
| 1145 | for (i = vreg->corner_count - 1; i >= 0; i--) { |
| 1146 | if (vreg->corner[i].cpr_fuse_corner == fuse_corner) { |
| 1147 | fmax_corner = i; |
| 1148 | break; |
| 1149 | } |
| 1150 | } |
| 1151 | if (fmax_corner < 0) { |
| 1152 | cpr3_err(vreg, "could not find %s Fmax corner\n", |
| 1153 | cpr3_msm8996_hmss_fuse_corner_name[fuse_corner]); |
| 1154 | return -EINVAL; |
| 1155 | } |
| 1156 | |
| 1157 | for (i = 0; i < fmax_corner; i++) |
| 1158 | vreg->corner[i] = vreg->corner[fmax_corner]; |
| 1159 | |
| 1160 | return 0; |
| 1161 | } |
| 1162 | |
| 1163 | /** |
| 1164 | * cpr3_hmss_print_settings() - print out HMSS CPR configuration settings into |
| 1165 | * the kernel log for debugging purposes |
| 1166 | * @vreg: Pointer to the CPR3 regulator |
| 1167 | */ |
| 1168 | static void cpr3_hmss_print_settings(struct cpr3_regulator *vreg) |
| 1169 | { |
| 1170 | struct cpr3_corner *corner; |
| 1171 | int i; |
| 1172 | |
| 1173 | cpr3_debug(vreg, "Corner: Frequency (Hz), Fuse Corner, Floor (uV), Open-Loop (uV), Ceiling (uV)\n"); |
| 1174 | for (i = 0; i < vreg->corner_count; i++) { |
| 1175 | corner = &vreg->corner[i]; |
| 1176 | cpr3_debug(vreg, "%3d: %10u, %2d, %7d, %7d, %7d\n", |
| 1177 | i, corner->proc_freq, corner->cpr_fuse_corner, |
| 1178 | corner->floor_volt, corner->open_loop_volt, |
| 1179 | corner->ceiling_volt); |
| 1180 | } |
| 1181 | |
| 1182 | if (vreg->thread->ctrl->apm) |
| 1183 | cpr3_debug(vreg, "APM threshold = %d uV, APM adjust = %d uV\n", |
| 1184 | vreg->thread->ctrl->apm_threshold_volt, |
| 1185 | vreg->thread->ctrl->apm_adj_volt); |
| 1186 | } |
| 1187 | |
| 1188 | /** |
| 1189 | * cpr3_hmss_init_thread() - perform steps necessary to initialize the |
| 1190 | * configuration data for a CPR3 thread |
| 1191 | * @thread: Pointer to the CPR3 thread |
| 1192 | * |
| 1193 | * Return: 0 on success, errno on failure |
| 1194 | */ |
| 1195 | static int cpr3_hmss_init_thread(struct cpr3_thread *thread) |
| 1196 | { |
| 1197 | int rc; |
| 1198 | |
| 1199 | rc = cpr3_parse_common_thread_data(thread); |
| 1200 | if (rc) { |
| 1201 | cpr3_err(thread->ctrl, "thread %u unable to read CPR thread data from device tree, rc=%d\n", |
| 1202 | thread->thread_id, rc); |
| 1203 | return rc; |
| 1204 | } |
| 1205 | |
| 1206 | return 0; |
| 1207 | } |
| 1208 | |
| 1209 | #define MAX_VREG_NAME_SIZE 25 |
| 1210 | /** |
| 1211 | * cpr3_hmss_kvreg_init() - initialize HMSS Kryo Regulator data for a CPR3 |
| 1212 | * regulator |
| 1213 | * @vreg: Pointer to the CPR3 regulator |
| 1214 | * |
| 1215 | * This function loads Kryo Regulator data from device tree if it is present |
| 1216 | * and requests a handle to the appropriate Kryo regulator device. In addition, |
| 1217 | * it initializes Kryo Regulator data originating from hardware fuses, such as |
| 1218 | * the LDO retention voltage, and requests the Kryo retention regulator to |
| 1219 | * be configured to that value. |
| 1220 | * |
| 1221 | * Return: 0 on success, errno on failure |
| 1222 | */ |
| 1223 | static int cpr3_hmss_kvreg_init(struct cpr3_regulator *vreg) |
| 1224 | { |
| 1225 | struct cpr3_msm8996_hmss_fuses *fuse = vreg->platform_fuses; |
| 1226 | struct device_node *node = vreg->of_node; |
| 1227 | struct cpr3_controller *ctrl = vreg->thread->ctrl; |
| 1228 | int id = vreg->thread->thread_id; |
| 1229 | char kvreg_name_buf[MAX_VREG_NAME_SIZE]; |
| 1230 | int rc; |
| 1231 | |
| 1232 | scnprintf(kvreg_name_buf, MAX_VREG_NAME_SIZE, |
| 1233 | "vdd-thread%d-ldo-supply", id); |
| 1234 | |
| 1235 | if (!of_find_property(ctrl->dev->of_node, kvreg_name_buf, NULL)) |
| 1236 | return 0; |
| 1237 | else if (!of_find_property(node, "qcom,ldo-min-headroom-voltage", NULL)) |
| 1238 | return 0; |
| 1239 | |
| 1240 | scnprintf(kvreg_name_buf, MAX_VREG_NAME_SIZE, "vdd-thread%d-ldo", id); |
| 1241 | |
| 1242 | vreg->ldo_regulator = devm_regulator_get(ctrl->dev, kvreg_name_buf); |
| 1243 | if (IS_ERR(vreg->ldo_regulator)) { |
| 1244 | rc = PTR_ERR(vreg->ldo_regulator); |
| 1245 | if (rc != -EPROBE_DEFER) |
| 1246 | cpr3_err(vreg, "unable to request %s regulator, rc=%d\n", |
| 1247 | kvreg_name_buf, rc); |
| 1248 | return rc; |
| 1249 | } |
| 1250 | |
| 1251 | vreg->ldo_regulator_bypass = BHS_MODE; |
| 1252 | |
| 1253 | scnprintf(kvreg_name_buf, MAX_VREG_NAME_SIZE, "vdd-thread%d-ldo-ret", |
| 1254 | id); |
| 1255 | |
| 1256 | vreg->ldo_ret_regulator = devm_regulator_get(ctrl->dev, kvreg_name_buf); |
| 1257 | if (IS_ERR(vreg->ldo_ret_regulator)) { |
| 1258 | rc = PTR_ERR(vreg->ldo_ret_regulator); |
| 1259 | if (rc != -EPROBE_DEFER) |
| 1260 | cpr3_err(vreg, "unable to request %s regulator, rc=%d\n", |
| 1261 | kvreg_name_buf, rc); |
| 1262 | return rc; |
| 1263 | } |
| 1264 | |
| 1265 | if (!ctrl->system_supply_max_volt) { |
| 1266 | cpr3_err(ctrl, "system-supply max voltage must be specified\n"); |
| 1267 | return -EINVAL; |
| 1268 | } |
| 1269 | |
| 1270 | rc = of_property_read_u32(node, "qcom,ldo-min-headroom-voltage", |
| 1271 | &vreg->ldo_min_headroom_volt); |
| 1272 | if (rc) { |
| 1273 | cpr3_err(vreg, "error reading qcom,ldo-min-headroom-voltage, rc=%d\n", |
| 1274 | rc); |
| 1275 | return rc; |
| 1276 | } |
| 1277 | |
| 1278 | rc = of_property_read_u32(node, "qcom,ldo-max-headroom-voltage", |
| 1279 | &vreg->ldo_max_headroom_volt); |
| 1280 | if (rc) { |
| 1281 | cpr3_err(vreg, "error reading qcom,ldo-max-headroom-voltage, rc=%d\n", |
| 1282 | rc); |
| 1283 | return rc; |
| 1284 | } |
| 1285 | |
| 1286 | rc = of_property_read_u32(node, "qcom,ldo-max-voltage", |
| 1287 | &vreg->ldo_max_volt); |
| 1288 | if (rc) { |
| 1289 | cpr3_err(vreg, "error reading qcom,ldo-max-voltage, rc=%d\n", |
| 1290 | rc); |
| 1291 | return rc; |
| 1292 | } |
| 1293 | |
| 1294 | /* Determine the CPU retention voltage based on fused data */ |
| 1295 | vreg->ldo_ret_volt = |
| 1296 | max(msm8996_vdd_apcc_fuse_ret_volt[fuse->vdd_apcc_ret_fuse], |
| 1297 | msm8996_vdd_mx_fuse_ret_volt[fuse->vdd_mx_ret_fuse]); |
| 1298 | |
| 1299 | rc = regulator_set_voltage(vreg->ldo_ret_regulator, vreg->ldo_ret_volt, |
| 1300 | INT_MAX); |
| 1301 | if (rc < 0) { |
| 1302 | cpr3_err(vreg, "regulator_set_voltage(ldo_ret) == %d failed, rc=%d\n", |
| 1303 | vreg->ldo_ret_volt, rc); |
| 1304 | return rc; |
| 1305 | } |
| 1306 | |
| 1307 | /* optional properties, do not error out if missing */ |
| 1308 | of_property_read_u32(node, "qcom,ldo-adjust-voltage", |
| 1309 | &vreg->ldo_adjust_volt); |
| 1310 | |
| 1311 | vreg->ldo_mode_allowed = !of_property_read_bool(node, |
| 1312 | "qcom,ldo-disable"); |
| 1313 | |
| 1314 | cpr3_info(vreg, "LDO min headroom=%d uV, LDO max headroom=%d uV, LDO adj=%d uV, LDO mode=%s, LDO retention=%d uV\n", |
| 1315 | vreg->ldo_min_headroom_volt, |
| 1316 | vreg->ldo_max_headroom_volt, |
| 1317 | vreg->ldo_adjust_volt, |
| 1318 | vreg->ldo_mode_allowed ? "allowed" : "disallowed", |
| 1319 | vreg->ldo_ret_volt); |
| 1320 | |
| 1321 | return 0; |
| 1322 | } |
| 1323 | |
| 1324 | /** |
| 1325 | * cpr3_hmss_mem_acc_init() - initialize mem-acc regulator data for |
| 1326 | * a CPR3 regulator |
| 1327 | * @vreg: Pointer to the CPR3 regulator |
| 1328 | * |
| 1329 | * This function loads mem-acc data from device tree to enable |
| 1330 | * the control of mem-acc settings based upon the CPR3 regulator |
| 1331 | * output voltage. |
| 1332 | * |
| 1333 | * Return: 0 on success, errno on failure |
| 1334 | */ |
| 1335 | static int cpr3_hmss_mem_acc_init(struct cpr3_regulator *vreg) |
| 1336 | { |
| 1337 | struct cpr3_controller *ctrl = vreg->thread->ctrl; |
| 1338 | int id = vreg->thread->thread_id; |
| 1339 | char mem_acc_vreg_name_buf[MAX_VREG_NAME_SIZE]; |
| 1340 | int rc; |
| 1341 | |
| 1342 | scnprintf(mem_acc_vreg_name_buf, MAX_VREG_NAME_SIZE, |
| 1343 | "mem-acc-thread%d-supply", id); |
| 1344 | |
| 1345 | if (!of_find_property(ctrl->dev->of_node, mem_acc_vreg_name_buf, |
| 1346 | NULL)) { |
| 1347 | cpr3_debug(vreg, "not using memory accelerator regulator\n"); |
| 1348 | return 0; |
| 1349 | } else if (!of_property_read_bool(vreg->of_node, "qcom,uses-mem-acc")) { |
| 1350 | return 0; |
| 1351 | } |
| 1352 | |
| 1353 | scnprintf(mem_acc_vreg_name_buf, MAX_VREG_NAME_SIZE, |
| 1354 | "mem-acc-thread%d", id); |
| 1355 | |
| 1356 | vreg->mem_acc_regulator = devm_regulator_get(ctrl->dev, |
| 1357 | mem_acc_vreg_name_buf); |
| 1358 | if (IS_ERR(vreg->mem_acc_regulator)) { |
| 1359 | rc = PTR_ERR(vreg->mem_acc_regulator); |
| 1360 | if (rc != -EPROBE_DEFER) |
| 1361 | cpr3_err(vreg, "unable to request %s regulator, rc=%d\n", |
| 1362 | mem_acc_vreg_name_buf, rc); |
| 1363 | return rc; |
| 1364 | } |
| 1365 | |
| 1366 | return 0; |
| 1367 | } |
| 1368 | |
| 1369 | /** |
| 1370 | * cpr3_hmss_init_regulator() - perform all steps necessary to initialize the |
| 1371 | * configuration data for a CPR3 regulator |
| 1372 | * @vreg: Pointer to the CPR3 regulator |
| 1373 | * |
| 1374 | * Return: 0 on success, errno on failure |
| 1375 | */ |
| 1376 | static int cpr3_hmss_init_regulator(struct cpr3_regulator *vreg) |
| 1377 | { |
| 1378 | struct cpr3_msm8996_hmss_fuses *fuse; |
| 1379 | int rc; |
| 1380 | |
| 1381 | rc = cpr3_msm8996_hmss_read_fuse_data(vreg); |
| 1382 | if (rc) { |
| 1383 | cpr3_err(vreg, "unable to read CPR fuse data, rc=%d\n", rc); |
| 1384 | return rc; |
| 1385 | } |
| 1386 | |
| 1387 | rc = cpr3_hmss_kvreg_init(vreg); |
| 1388 | if (rc) { |
| 1389 | if (rc != -EPROBE_DEFER) |
| 1390 | cpr3_err(vreg, "unable to initialize Kryo Regulator settings, rc=%d\n", |
| 1391 | rc); |
| 1392 | return rc; |
| 1393 | } |
| 1394 | |
| 1395 | rc = cpr3_hmss_mem_acc_init(vreg); |
| 1396 | if (rc) { |
| 1397 | if (rc != -EPROBE_DEFER) |
| 1398 | cpr3_err(vreg, "unable to initialize mem-acc regulator settings, rc=%d\n", |
| 1399 | rc); |
| 1400 | return rc; |
| 1401 | } |
| 1402 | |
| 1403 | fuse = vreg->platform_fuses; |
| 1404 | if (fuse->limitation == MSM8996_CPR_LIMITATION_UNSUPPORTED) { |
| 1405 | cpr3_err(vreg, "this chip requires an unsupported voltage\n"); |
| 1406 | return -EPERM; |
| 1407 | } else if (fuse->limitation |
| 1408 | == MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION) { |
| 1409 | vreg->thread->ctrl->cpr_allowed_hw = false; |
| 1410 | } |
| 1411 | |
| 1412 | rc = of_property_read_u32(vreg->of_node, "qcom,cpr-pd-bypass-mask", |
| 1413 | &vreg->pd_bypass_mask); |
| 1414 | if (rc) { |
| 1415 | cpr3_err(vreg, "error reading qcom,cpr-pd-bypass-mask, rc=%d\n", |
| 1416 | rc); |
| 1417 | return rc; |
| 1418 | } |
| 1419 | |
| 1420 | rc = cpr3_hmss_parse_corner_data(vreg); |
| 1421 | if (rc) { |
| 1422 | cpr3_err(vreg, "unable to read CPR corner data from device tree, rc=%d\n", |
| 1423 | rc); |
| 1424 | return rc; |
| 1425 | } |
| 1426 | |
| 1427 | if (of_find_property(vreg->of_node, "qcom,cpr-dynamic-floor-corner", |
| 1428 | NULL)) { |
| 1429 | rc = cpr3_parse_array_property(vreg, |
| 1430 | "qcom,cpr-dynamic-floor-corner", |
| 1431 | 1, &vreg->dynamic_floor_corner); |
| 1432 | if (rc) { |
| 1433 | cpr3_err(vreg, "error reading qcom,cpr-dynamic-floor-corner, rc=%d\n", |
| 1434 | rc); |
| 1435 | return rc; |
| 1436 | } |
| 1437 | |
| 1438 | if (vreg->dynamic_floor_corner <= 0) { |
| 1439 | vreg->uses_dynamic_floor = false; |
| 1440 | } else if (vreg->dynamic_floor_corner < CPR3_CORNER_OFFSET |
| 1441 | || vreg->dynamic_floor_corner |
| 1442 | > vreg->corner_count - 1 + CPR3_CORNER_OFFSET) { |
| 1443 | cpr3_err(vreg, "dynamic floor corner=%d not in range [%d, %d]\n", |
| 1444 | vreg->dynamic_floor_corner, CPR3_CORNER_OFFSET, |
| 1445 | vreg->corner_count - 1 + CPR3_CORNER_OFFSET); |
| 1446 | return -EINVAL; |
| 1447 | } |
| 1448 | |
| 1449 | vreg->dynamic_floor_corner -= CPR3_CORNER_OFFSET; |
| 1450 | vreg->uses_dynamic_floor = true; |
| 1451 | } |
| 1452 | |
| 1453 | rc = cpr3_msm8996_hmss_calculate_open_loop_voltages(vreg); |
| 1454 | if (rc) { |
| 1455 | cpr3_err(vreg, "unable to calculate open-loop voltages, rc=%d\n", |
| 1456 | rc); |
| 1457 | return rc; |
| 1458 | } |
| 1459 | |
| 1460 | rc = cpr3_limit_open_loop_voltages(vreg); |
| 1461 | if (rc) { |
| 1462 | cpr3_err(vreg, "unable to limit open-loop voltages, rc=%d\n", |
| 1463 | rc); |
| 1464 | return rc; |
| 1465 | } |
| 1466 | |
| 1467 | cpr3_open_loop_voltage_as_ceiling(vreg); |
| 1468 | |
| 1469 | rc = cpr3_limit_floor_voltages(vreg); |
| 1470 | if (rc) { |
| 1471 | cpr3_err(vreg, "unable to limit floor voltages, rc=%d\n", rc); |
| 1472 | return rc; |
| 1473 | } |
| 1474 | |
| 1475 | rc = cpr3_msm8996_hmss_calculate_target_quotients(vreg); |
| 1476 | if (rc) { |
| 1477 | cpr3_err(vreg, "unable to calculate target quotients, rc=%d\n", |
| 1478 | rc); |
| 1479 | return rc; |
| 1480 | } |
| 1481 | |
| 1482 | rc = cpr3_msm8996_partial_binning_override(vreg); |
| 1483 | if (rc) { |
| 1484 | cpr3_err(vreg, "unable to override voltages and quotients based on partial binning fuse, rc=%d\n", |
| 1485 | rc); |
| 1486 | return rc; |
| 1487 | } |
| 1488 | |
| 1489 | cpr3_hmss_print_settings(vreg); |
| 1490 | |
| 1491 | return 0; |
| 1492 | } |
| 1493 | |
| 1494 | /** |
| 1495 | * cpr3_hmss_init_aging() - perform HMSS CPR3 controller specific |
| 1496 | * aging initializations |
| 1497 | * @ctrl: Pointer to the CPR3 controller |
| 1498 | * |
| 1499 | * Return: 0 on success, errno on failure |
| 1500 | */ |
| 1501 | static int cpr3_hmss_init_aging(struct cpr3_controller *ctrl) |
| 1502 | { |
| 1503 | struct cpr3_msm8996_hmss_fuses *fuse = NULL; |
| 1504 | struct cpr3_regulator *vreg; |
| 1505 | u32 aging_ro_scale; |
| 1506 | int i, j, rc; |
| 1507 | |
| 1508 | for (i = 0; i < ctrl->thread_count; i++) { |
| 1509 | for (j = 0; j < ctrl->thread[i].vreg_count; j++) { |
| 1510 | if (ctrl->thread[i].vreg[j].aging_allowed) { |
| 1511 | ctrl->aging_required = true; |
| 1512 | vreg = &ctrl->thread[i].vreg[j]; |
| 1513 | fuse = vreg->platform_fuses; |
| 1514 | break; |
| 1515 | } |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | if (!ctrl->aging_required || !fuse || !vreg) |
| 1520 | return 0; |
| 1521 | |
| 1522 | rc = cpr3_parse_array_property(vreg, "qcom,cpr-aging-ro-scaling-factor", |
| 1523 | 1, &aging_ro_scale); |
| 1524 | if (rc) |
| 1525 | return rc; |
| 1526 | |
| 1527 | if (aging_ro_scale == 0) { |
| 1528 | cpr3_err(ctrl, "aging RO scaling factor is invalid: %u\n", |
| 1529 | aging_ro_scale); |
| 1530 | return -EINVAL; |
| 1531 | } |
| 1532 | |
| 1533 | ctrl->aging_vdd_mode = REGULATOR_MODE_NORMAL; |
| 1534 | ctrl->aging_complete_vdd_mode = REGULATOR_MODE_IDLE; |
| 1535 | |
| 1536 | ctrl->aging_sensor_count = 1; |
| 1537 | ctrl->aging_sensor = kzalloc(sizeof(*ctrl->aging_sensor), GFP_KERNEL); |
| 1538 | if (!ctrl->aging_sensor) |
| 1539 | return -ENOMEM; |
| 1540 | |
| 1541 | ctrl->aging_sensor->sensor_id = MSM8996_HMSS_AGING_SENSOR_ID; |
| 1542 | ctrl->aging_sensor->bypass_mask[0] = MSM8996_HMSS_AGING_BYPASS_MASK0; |
| 1543 | ctrl->aging_sensor->ro_scale = aging_ro_scale; |
| 1544 | |
| 1545 | ctrl->aging_sensor->init_quot_diff |
| 1546 | = cpr3_convert_open_loop_voltage_fuse(0, |
| 1547 | MSM8996_HMSS_AGING_INIT_QUOT_DIFF_SCALE, |
| 1548 | fuse->aging_init_quot_diff, |
| 1549 | MSM8996_HMSS_AGING_INIT_QUOT_DIFF_SIZE); |
| 1550 | |
| 1551 | cpr3_debug(ctrl, "sensor %u aging init quotient diff = %d, aging RO scale = %u QUOT/V\n", |
| 1552 | ctrl->aging_sensor->sensor_id, |
| 1553 | ctrl->aging_sensor->init_quot_diff, |
| 1554 | ctrl->aging_sensor->ro_scale); |
| 1555 | |
| 1556 | return 0; |
| 1557 | } |
| 1558 | |
| 1559 | /** |
| 1560 | * cpr3_hmss_init_controller() - perform HMSS CPR3 controller specific |
| 1561 | * initializations |
| 1562 | * @ctrl: Pointer to the CPR3 controller |
| 1563 | * |
| 1564 | * Return: 0 on success, errno on failure |
| 1565 | */ |
| 1566 | static int cpr3_hmss_init_controller(struct cpr3_controller *ctrl) |
| 1567 | { |
| 1568 | int i, rc; |
| 1569 | |
| 1570 | rc = cpr3_parse_common_ctrl_data(ctrl); |
| 1571 | if (rc) { |
| 1572 | if (rc != -EPROBE_DEFER) |
| 1573 | cpr3_err(ctrl, "unable to parse common controller data, rc=%d\n", |
| 1574 | rc); |
| 1575 | return rc; |
| 1576 | } |
| 1577 | |
| 1578 | ctrl->vdd_limit_regulator = devm_regulator_get(ctrl->dev, "vdd-limit"); |
| 1579 | if (IS_ERR(ctrl->vdd_limit_regulator)) { |
| 1580 | rc = PTR_ERR(ctrl->vdd_limit_regulator); |
| 1581 | if (rc != -EPROBE_DEFER) |
| 1582 | cpr3_err(ctrl, "unable to request vdd-supply regulator, rc=%d\n", |
| 1583 | rc); |
| 1584 | return rc; |
| 1585 | } |
| 1586 | |
| 1587 | rc = of_property_read_u32(ctrl->dev->of_node, |
| 1588 | "qcom,cpr-up-down-delay-time", |
| 1589 | &ctrl->up_down_delay_time); |
| 1590 | if (rc) { |
| 1591 | cpr3_err(ctrl, "error reading property qcom,cpr-up-down-delay-time, rc=%d\n", |
| 1592 | rc); |
| 1593 | return rc; |
| 1594 | } |
| 1595 | |
| 1596 | /* No error check since this is an optional property. */ |
| 1597 | of_property_read_u32(ctrl->dev->of_node, |
| 1598 | "qcom,system-supply-max-voltage", |
| 1599 | &ctrl->system_supply_max_volt); |
| 1600 | |
| 1601 | /* No error check since this is an optional property. */ |
| 1602 | of_property_read_u32(ctrl->dev->of_node, "qcom,cpr-clock-throttling", |
| 1603 | &ctrl->proc_clock_throttle); |
| 1604 | |
| 1605 | rc = cpr3_apm_init(ctrl); |
| 1606 | if (rc) { |
| 1607 | if (rc != -EPROBE_DEFER) |
| 1608 | cpr3_err(ctrl, "unable to initialize APM settings, rc=%d\n", |
| 1609 | rc); |
| 1610 | return rc; |
| 1611 | } |
| 1612 | |
| 1613 | ctrl->sensor_count = MSM8996_HMSS_CPR_SENSOR_COUNT; |
| 1614 | |
| 1615 | ctrl->sensor_owner = devm_kcalloc(ctrl->dev, ctrl->sensor_count, |
| 1616 | sizeof(*ctrl->sensor_owner), GFP_KERNEL); |
| 1617 | if (!ctrl->sensor_owner) |
| 1618 | return -ENOMEM; |
| 1619 | |
| 1620 | /* Specify sensor ownership */ |
| 1621 | for (i = MSM8996_HMSS_THREAD0_SENSOR_MIN; |
| 1622 | i <= MSM8996_HMSS_THREAD0_SENSOR_MAX; i++) |
| 1623 | ctrl->sensor_owner[i] = 0; |
| 1624 | for (i = MSM8996_HMSS_THREAD1_SENSOR_MIN; |
| 1625 | i <= MSM8996_HMSS_THREAD1_SENSOR_MAX; i++) |
| 1626 | ctrl->sensor_owner[i] = 1; |
| 1627 | |
| 1628 | ctrl->cpr_clock_rate = MSM8996_HMSS_CPR_CLOCK_RATE; |
| 1629 | ctrl->ctrl_type = CPR_CTRL_TYPE_CPR3; |
| 1630 | ctrl->supports_hw_closed_loop = true; |
| 1631 | ctrl->use_hw_closed_loop = of_property_read_bool(ctrl->dev->of_node, |
| 1632 | "qcom,cpr-hw-closed-loop"); |
| 1633 | |
| 1634 | if (ctrl->mem_acc_regulator) { |
| 1635 | rc = of_property_read_u32(ctrl->dev->of_node, |
| 1636 | "qcom,mem-acc-supply-threshold-voltage", |
| 1637 | &ctrl->mem_acc_threshold_volt); |
| 1638 | if (rc) { |
| 1639 | cpr3_err(ctrl, "error reading property qcom,mem-acc-supply-threshold-voltage, rc=%d\n", |
| 1640 | rc); |
| 1641 | return rc; |
| 1642 | } |
| 1643 | |
| 1644 | ctrl->mem_acc_threshold_volt = |
| 1645 | CPR3_ROUND(ctrl->mem_acc_threshold_volt, |
| 1646 | ctrl->step_volt); |
| 1647 | |
| 1648 | rc = of_property_read_u32_array(ctrl->dev->of_node, |
| 1649 | "qcom,mem-acc-supply-corner-map", |
| 1650 | &ctrl->mem_acc_corner_map[CPR3_MEM_ACC_LOW_CORNER], |
| 1651 | CPR3_MEM_ACC_CORNERS); |
| 1652 | if (rc) { |
| 1653 | cpr3_err(ctrl, "error reading qcom,mem-acc-supply-corner-map, rc=%d\n", |
| 1654 | rc); |
| 1655 | return rc; |
| 1656 | } |
| 1657 | } |
| 1658 | |
| 1659 | return 0; |
| 1660 | } |
| 1661 | |
| 1662 | static int cpr3_hmss_regulator_suspend(struct platform_device *pdev, |
| 1663 | pm_message_t state) |
| 1664 | { |
| 1665 | struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| 1666 | |
| 1667 | return cpr3_regulator_suspend(ctrl); |
| 1668 | } |
| 1669 | |
| 1670 | static int cpr3_hmss_regulator_resume(struct platform_device *pdev) |
| 1671 | { |
| 1672 | struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| 1673 | |
| 1674 | return cpr3_regulator_resume(ctrl); |
| 1675 | } |
| 1676 | |
| 1677 | /* Data corresponds to the SoC revision */ |
| 1678 | static const struct of_device_id cpr_regulator_match_table[] = { |
| 1679 | { |
| 1680 | .compatible = "qcom,cpr3-msm8996-v1-hmss-regulator", |
| 1681 | .data = (void *)(uintptr_t)1 |
| 1682 | }, |
| 1683 | { |
| 1684 | .compatible = "qcom,cpr3-msm8996-v2-hmss-regulator", |
| 1685 | .data = (void *)(uintptr_t)2 |
| 1686 | }, |
| 1687 | { |
| 1688 | .compatible = "qcom,cpr3-msm8996-v3-hmss-regulator", |
| 1689 | .data = (void *)(uintptr_t)3 |
| 1690 | }, |
| 1691 | { |
| 1692 | .compatible = "qcom,cpr3-msm8996-hmss-regulator", |
| 1693 | .data = (void *)(uintptr_t)3 |
| 1694 | }, |
| 1695 | { |
| 1696 | .compatible = "qcom,cpr3-msm8996pro-hmss-regulator", |
| 1697 | .data = (void *)(uintptr_t)MSM8996PRO_SOC_ID, |
| 1698 | }, |
| 1699 | {} |
| 1700 | }; |
| 1701 | |
| 1702 | static int cpr3_hmss_regulator_probe(struct platform_device *pdev) |
| 1703 | { |
| 1704 | struct device *dev = &pdev->dev; |
| 1705 | const struct of_device_id *match; |
| 1706 | struct cpr3_controller *ctrl; |
| 1707 | struct cpr3_regulator *vreg; |
| 1708 | int i, j, rc; |
| 1709 | |
| 1710 | if (!dev->of_node) { |
| 1711 | dev_err(dev, "Device tree node is missing\n"); |
| 1712 | return -EINVAL; |
| 1713 | } |
| 1714 | |
| 1715 | ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); |
| 1716 | if (!ctrl) |
| 1717 | return -ENOMEM; |
| 1718 | |
| 1719 | ctrl->dev = dev; |
| 1720 | /* Set to false later if anything precludes CPR operation. */ |
| 1721 | ctrl->cpr_allowed_hw = true; |
| 1722 | |
| 1723 | rc = of_property_read_string(dev->of_node, "qcom,cpr-ctrl-name", |
| 1724 | &ctrl->name); |
| 1725 | if (rc) { |
| 1726 | cpr3_err(ctrl, "unable to read qcom,cpr-ctrl-name, rc=%d\n", |
| 1727 | rc); |
| 1728 | return rc; |
| 1729 | } |
| 1730 | |
| 1731 | match = of_match_node(cpr_regulator_match_table, dev->of_node); |
| 1732 | if (match) |
| 1733 | ctrl->soc_revision = (uintptr_t)match->data; |
| 1734 | else |
| 1735 | cpr3_err(ctrl, "could not find compatible string match\n"); |
| 1736 | |
| 1737 | rc = cpr3_map_fuse_base(ctrl, pdev); |
| 1738 | if (rc) { |
| 1739 | cpr3_err(ctrl, "could not map fuse base address\n"); |
| 1740 | return rc; |
| 1741 | } |
| 1742 | |
| 1743 | rc = cpr3_allocate_threads(ctrl, MSM8996_HMSS_POWER_CLUSTER_THREAD_ID, |
| 1744 | MSM8996_HMSS_PERFORMANCE_CLUSTER_THREAD_ID); |
| 1745 | if (rc) { |
| 1746 | cpr3_err(ctrl, "failed to allocate CPR thread array, rc=%d\n", |
| 1747 | rc); |
| 1748 | return rc; |
| 1749 | } |
| 1750 | |
| 1751 | if (ctrl->thread_count < 1) { |
| 1752 | cpr3_err(ctrl, "thread nodes are missing\n"); |
| 1753 | return -EINVAL; |
| 1754 | } |
| 1755 | |
| 1756 | rc = cpr3_hmss_init_controller(ctrl); |
| 1757 | if (rc) { |
| 1758 | if (rc != -EPROBE_DEFER) |
| 1759 | cpr3_err(ctrl, "failed to initialize CPR controller parameters, rc=%d\n", |
| 1760 | rc); |
| 1761 | return rc; |
| 1762 | } |
| 1763 | |
| 1764 | for (i = 0; i < ctrl->thread_count; i++) { |
| 1765 | rc = cpr3_hmss_init_thread(&ctrl->thread[i]); |
| 1766 | if (rc) { |
| 1767 | cpr3_err(ctrl, "thread %u initialization failed, rc=%d\n", |
| 1768 | ctrl->thread[i].thread_id, rc); |
| 1769 | return rc; |
| 1770 | } |
| 1771 | |
| 1772 | for (j = 0; j < ctrl->thread[i].vreg_count; j++) { |
| 1773 | vreg = &ctrl->thread[i].vreg[j]; |
| 1774 | |
| 1775 | rc = cpr3_hmss_init_regulator(vreg); |
| 1776 | if (rc) { |
| 1777 | cpr3_err(vreg, "regulator initialization failed, rc=%d\n", |
| 1778 | rc); |
| 1779 | return rc; |
| 1780 | } |
| 1781 | } |
| 1782 | } |
| 1783 | |
| 1784 | rc = cpr3_hmss_init_aging(ctrl); |
| 1785 | if (rc) { |
| 1786 | cpr3_err(ctrl, "failed to initialize aging configurations, rc=%d\n", |
| 1787 | rc); |
| 1788 | return rc; |
| 1789 | } |
| 1790 | |
| 1791 | platform_set_drvdata(pdev, ctrl); |
| 1792 | |
| 1793 | return cpr3_regulator_register(pdev, ctrl); |
| 1794 | } |
| 1795 | |
| 1796 | static int cpr3_hmss_regulator_remove(struct platform_device *pdev) |
| 1797 | { |
| 1798 | struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| 1799 | |
| 1800 | return cpr3_regulator_unregister(ctrl); |
| 1801 | } |
| 1802 | |
| 1803 | static struct platform_driver cpr3_hmss_regulator_driver = { |
| 1804 | .driver = { |
| 1805 | .name = "qcom,cpr3-hmss-regulator", |
| 1806 | .of_match_table = cpr_regulator_match_table, |
| 1807 | .owner = THIS_MODULE, |
| 1808 | }, |
| 1809 | .probe = cpr3_hmss_regulator_probe, |
| 1810 | .remove = cpr3_hmss_regulator_remove, |
| 1811 | .suspend = cpr3_hmss_regulator_suspend, |
| 1812 | .resume = cpr3_hmss_regulator_resume, |
| 1813 | }; |
| 1814 | |
| 1815 | static int cpr_regulator_init(void) |
| 1816 | { |
| 1817 | return platform_driver_register(&cpr3_hmss_regulator_driver); |
| 1818 | } |
| 1819 | |
| 1820 | static void cpr_regulator_exit(void) |
| 1821 | { |
| 1822 | platform_driver_unregister(&cpr3_hmss_regulator_driver); |
| 1823 | } |
| 1824 | |
| 1825 | MODULE_DESCRIPTION("CPR3 HMSS regulator driver"); |
| 1826 | MODULE_LICENSE("GPL v2"); |
| 1827 | |
| 1828 | arch_initcall(cpr_regulator_init); |
| 1829 | module_exit(cpr_regulator_exit); |