David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/of.h> |
| 23 | #include <linux/of_device.h> |
| 24 | #include <linux/platform_device.h> |
| 25 | #include <linux/regulator/driver.h> |
| 26 | #include <linux/regulator/machine.h> |
| 27 | #include <linux/regulator/of_regulator.h> |
| 28 | #include <mach/rpm-smd.h> |
| 29 | #include <mach/rpm-regulator-smd.h> |
| 30 | #include <mach/socinfo.h> |
| 31 | |
| 32 | /* Debug Definitions */ |
| 33 | |
| 34 | enum { |
| 35 | RPM_VREG_DEBUG_REQUEST = BIT(0), |
| 36 | RPM_VREG_DEBUG_FULL_REQUEST = BIT(1), |
| 37 | RPM_VREG_DEBUG_DUPLICATE = BIT(2), |
| 38 | }; |
| 39 | |
| 40 | static int rpm_vreg_debug_mask; |
| 41 | module_param_named( |
| 42 | debug_mask, rpm_vreg_debug_mask, int, S_IRUSR | S_IWUSR |
| 43 | ); |
| 44 | |
| 45 | #define vreg_err(req, fmt, ...) \ |
| 46 | pr_err("%s: " fmt, req->rdesc.name, ##__VA_ARGS__) |
| 47 | |
| 48 | /* RPM regulator request types */ |
| 49 | enum rpm_regulator_smd_type { |
| 50 | RPM_REGULATOR_SMD_TYPE_LDO, |
| 51 | RPM_REGULATOR_SMD_TYPE_SMPS, |
| 52 | RPM_REGULATOR_SMD_TYPE_VS, |
| 53 | RPM_REGULATOR_SMD_TYPE_NCP, |
| 54 | RPM_REGULATOR_SMD_TYPE_MAX, |
| 55 | }; |
| 56 | |
| 57 | /* RPM resource parameters */ |
| 58 | enum rpm_regulator_param_index { |
| 59 | RPM_REGULATOR_PARAM_ENABLE, |
| 60 | RPM_REGULATOR_PARAM_VOLTAGE, |
| 61 | RPM_REGULATOR_PARAM_CURRENT, |
| 62 | RPM_REGULATOR_PARAM_MODE_LDO, |
| 63 | RPM_REGULATOR_PARAM_MODE_SMPS, |
| 64 | RPM_REGULATOR_PARAM_PIN_CTRL_ENABLE, |
| 65 | RPM_REGULATOR_PARAM_PIN_CTRL_MODE, |
| 66 | RPM_REGULATOR_PARAM_FREQUENCY, |
| 67 | RPM_REGULATOR_PARAM_HEAD_ROOM, |
| 68 | RPM_REGULATOR_PARAM_QUIET_MODE, |
| 69 | RPM_REGULATOR_PARAM_FREQ_REASON, |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 70 | RPM_REGULATOR_PARAM_CORNER, |
David Collins | 85b7199 | 2012-07-18 12:00:14 -0700 | [diff] [blame] | 71 | RPM_REGULATOR_PARAM_BYPASS, |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 72 | RPM_REGULATOR_PARAM_FLOOR_CORNER, |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 73 | RPM_REGULATOR_PARAM_MAX, |
| 74 | }; |
| 75 | |
| 76 | #define RPM_SET_CONFIG_ACTIVE BIT(0) |
| 77 | #define RPM_SET_CONFIG_SLEEP BIT(1) |
| 78 | #define RPM_SET_CONFIG_BOTH (RPM_SET_CONFIG_ACTIVE \ |
| 79 | | RPM_SET_CONFIG_SLEEP) |
| 80 | struct rpm_regulator_param { |
| 81 | char *name; |
| 82 | char *property_name; |
| 83 | u32 key; |
| 84 | u32 min; |
| 85 | u32 max; |
| 86 | u32 supported_regulator_types; |
| 87 | }; |
| 88 | |
| 89 | #define PARAM(_idx, _support_ldo, _support_smps, _support_vs, _support_ncp, \ |
| 90 | _name, _min, _max, _property_name) \ |
| 91 | [RPM_REGULATOR_PARAM_##_idx] = { \ |
| 92 | .name = _name, \ |
| 93 | .property_name = _property_name, \ |
| 94 | .min = _min, \ |
| 95 | .max = _max, \ |
| 96 | .supported_regulator_types = \ |
| 97 | _support_ldo << RPM_REGULATOR_SMD_TYPE_LDO | \ |
| 98 | _support_smps << RPM_REGULATOR_SMD_TYPE_SMPS | \ |
| 99 | _support_vs << RPM_REGULATOR_SMD_TYPE_VS | \ |
| 100 | _support_ncp << RPM_REGULATOR_SMD_TYPE_NCP, \ |
| 101 | } |
| 102 | |
| 103 | static struct rpm_regulator_param params[RPM_REGULATOR_PARAM_MAX] = { |
| 104 | /* ID LDO SMPS VS NCP name min max property-name */ |
| 105 | PARAM(ENABLE, 1, 1, 1, 1, "swen", 0, 1, "qcom,init-enable"), |
| 106 | PARAM(VOLTAGE, 1, 1, 0, 1, "uv", 0, 0x7FFFFFF, "qcom,init-voltage"), |
| 107 | PARAM(CURRENT, 1, 1, 0, 0, "ma", 0, 0x1FFF, "qcom,init-current"), |
| 108 | PARAM(MODE_LDO, 1, 0, 0, 0, "lsmd", 0, 1, "qcom,init-ldo-mode"), |
| 109 | PARAM(MODE_SMPS, 0, 1, 0, 0, "ssmd", 0, 2, "qcom,init-smps-mode"), |
| 110 | PARAM(PIN_CTRL_ENABLE, 1, 1, 1, 0, "pcen", 0, 0xF, "qcom,init-pin-ctrl-enable"), |
| 111 | PARAM(PIN_CTRL_MODE, 1, 1, 1, 0, "pcmd", 0, 0x1F, "qcom,init-pin-ctrl-mode"), |
David Collins | d1247e0 | 2013-03-05 11:15:30 -0800 | [diff] [blame] | 112 | PARAM(FREQUENCY, 0, 1, 0, 1, "freq", 0, 31, "qcom,init-frequency"), |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 113 | PARAM(HEAD_ROOM, 1, 0, 0, 1, "hr", 0, 0x7FFFFFFF, "qcom,init-head-room"), |
| 114 | PARAM(QUIET_MODE, 0, 1, 0, 0, "qm", 0, 2, "qcom,init-quiet-mode"), |
| 115 | PARAM(FREQ_REASON, 0, 1, 0, 1, "resn", 0, 8, "qcom,init-freq-reason"), |
David Collins | 23c96cd | 2012-10-05 17:12:00 -0700 | [diff] [blame] | 116 | PARAM(CORNER, 1, 1, 0, 0, "corn", 0, 6, "qcom,init-voltage-corner"), |
David Collins | 85b7199 | 2012-07-18 12:00:14 -0700 | [diff] [blame] | 117 | PARAM(BYPASS, 1, 0, 0, 0, "bypa", 0, 1, "qcom,init-disallow-bypass"), |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 118 | PARAM(FLOOR_CORNER, 1, 1, 0, 0, "vfc", 0, 6, "qcom,init-voltage-floor-corner"), |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 119 | }; |
| 120 | |
| 121 | struct rpm_vreg_request { |
| 122 | u32 param[RPM_REGULATOR_PARAM_MAX]; |
| 123 | u32 valid; |
| 124 | u32 modified; |
| 125 | }; |
| 126 | |
| 127 | struct rpm_vreg { |
| 128 | struct rpm_vreg_request aggr_req_active; |
| 129 | struct rpm_vreg_request aggr_req_sleep; |
| 130 | struct list_head reg_list; |
| 131 | const char *resource_name; |
| 132 | u32 resource_id; |
| 133 | bool allow_atomic; |
| 134 | int regulator_type; |
| 135 | int hpm_min_load; |
| 136 | int enable_time; |
| 137 | struct spinlock slock; |
| 138 | struct mutex mlock; |
| 139 | unsigned long flags; |
| 140 | bool sleep_request_sent; |
| 141 | struct msm_rpm_request *handle_active; |
| 142 | struct msm_rpm_request *handle_sleep; |
| 143 | }; |
| 144 | |
| 145 | struct rpm_regulator { |
| 146 | struct regulator_desc rdesc; |
| 147 | struct regulator_dev *rdev; |
| 148 | struct rpm_vreg *rpm_vreg; |
| 149 | struct list_head list; |
| 150 | bool set_active; |
| 151 | bool set_sleep; |
David Collins | 409a9fa | 2013-03-05 10:54:25 -0800 | [diff] [blame] | 152 | bool always_send_voltage; |
| 153 | bool always_send_current; |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 154 | struct rpm_vreg_request req; |
| 155 | int system_load; |
| 156 | int min_uV; |
| 157 | int max_uV; |
| 158 | }; |
| 159 | |
| 160 | /* |
| 161 | * This voltage in uV is returned by get_voltage functions when there is no way |
| 162 | * to determine the current voltage level. It is needed because the regulator |
| 163 | * framework treats a 0 uV voltage as an error. |
| 164 | */ |
| 165 | #define VOLTAGE_UNKNOWN 1 |
| 166 | |
| 167 | /* |
| 168 | * Regulator requests sent in the active set take effect immediately. Requests |
| 169 | * sent in the sleep set take effect when the Apps processor transitions into |
| 170 | * RPM assisted power collapse. For any given regulator, if an active set |
| 171 | * request is present, but not a sleep set request, then the active set request |
| 172 | * is used at all times, even when the Apps processor is power collapsed. |
| 173 | * |
| 174 | * The rpm-regulator-smd takes advantage of this default usage of the active set |
| 175 | * request by only sending a sleep set request if it differs from the |
| 176 | * corresponding active set request. |
| 177 | */ |
| 178 | #define RPM_SET_ACTIVE MSM_RPM_CTX_ACTIVE_SET |
| 179 | #define RPM_SET_SLEEP MSM_RPM_CTX_SLEEP_SET |
| 180 | |
| 181 | static u32 rpm_vreg_string_to_int(const u8 *str) |
| 182 | { |
| 183 | int i, len; |
| 184 | u32 output = 0; |
| 185 | |
| 186 | len = strnlen(str, sizeof(u32)); |
| 187 | for (i = 0; i < len; i++) |
| 188 | output |= str[i] << (i * 8); |
| 189 | |
| 190 | return output; |
| 191 | } |
| 192 | |
| 193 | static inline void rpm_vreg_lock(struct rpm_vreg *rpm_vreg) |
| 194 | { |
| 195 | if (rpm_vreg->allow_atomic) |
| 196 | spin_lock_irqsave(&rpm_vreg->slock, rpm_vreg->flags); |
| 197 | else |
| 198 | mutex_lock(&rpm_vreg->mlock); |
| 199 | } |
| 200 | |
| 201 | static inline void rpm_vreg_unlock(struct rpm_vreg *rpm_vreg) |
| 202 | { |
| 203 | if (rpm_vreg->allow_atomic) |
| 204 | spin_unlock_irqrestore(&rpm_vreg->slock, rpm_vreg->flags); |
| 205 | else |
| 206 | mutex_unlock(&rpm_vreg->mlock); |
| 207 | } |
| 208 | |
| 209 | static inline bool rpm_vreg_active_or_sleep_enabled(struct rpm_vreg *rpm_vreg) |
| 210 | { |
| 211 | return (rpm_vreg->aggr_req_active.param[RPM_REGULATOR_PARAM_ENABLE] |
| 212 | && (rpm_vreg->aggr_req_active.valid |
| 213 | & BIT(RPM_REGULATOR_PARAM_ENABLE))) |
| 214 | || ((rpm_vreg->aggr_req_sleep.param[RPM_REGULATOR_PARAM_ENABLE]) |
| 215 | && (rpm_vreg->aggr_req_sleep.valid |
| 216 | & BIT(RPM_REGULATOR_PARAM_ENABLE))); |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | * This is used when voting for LPM or HPM by subtracting or adding to the |
| 221 | * hpm_min_load of a regulator. It has units of uA. |
| 222 | */ |
| 223 | #define LOAD_THRESHOLD_STEP 1000 |
| 224 | |
| 225 | static inline int rpm_vreg_hpm_min_uA(struct rpm_vreg *rpm_vreg) |
| 226 | { |
| 227 | return rpm_vreg->hpm_min_load; |
| 228 | } |
| 229 | |
| 230 | static inline int rpm_vreg_lpm_max_uA(struct rpm_vreg *rpm_vreg) |
| 231 | { |
| 232 | return rpm_vreg->hpm_min_load - LOAD_THRESHOLD_STEP; |
| 233 | } |
| 234 | |
| 235 | #define MICRO_TO_MILLI(uV) ((uV) / 1000) |
| 236 | #define MILLI_TO_MICRO(uV) ((uV) * 1000) |
| 237 | |
| 238 | #define DEBUG_PRINT_BUFFER_SIZE 512 |
| 239 | #define REQ_SENT 0 |
| 240 | #define REQ_PREV 1 |
| 241 | #define REQ_CACHED 2 |
| 242 | #define REQ_TYPES 3 |
| 243 | |
| 244 | static void rpm_regulator_req(struct rpm_regulator *regulator, int set, |
| 245 | bool sent) |
| 246 | { |
| 247 | char buf[DEBUG_PRINT_BUFFER_SIZE]; |
| 248 | size_t buflen = DEBUG_PRINT_BUFFER_SIZE; |
| 249 | struct rpm_vreg *rpm_vreg = regulator->rpm_vreg; |
| 250 | struct rpm_vreg_request *aggr; |
| 251 | bool first; |
| 252 | u32 mask[REQ_TYPES] = {0, 0, 0}; |
| 253 | const char *req_names[REQ_TYPES] = {"sent", "prev", "cached"}; |
| 254 | int pos = 0; |
| 255 | int i, j; |
| 256 | |
| 257 | aggr = (set == RPM_SET_ACTIVE) |
| 258 | ? &rpm_vreg->aggr_req_active : &rpm_vreg->aggr_req_sleep; |
| 259 | |
| 260 | if (rpm_vreg_debug_mask & RPM_VREG_DEBUG_DUPLICATE) { |
| 261 | mask[REQ_SENT] = aggr->modified; |
| 262 | mask[REQ_PREV] = aggr->valid & ~aggr->modified; |
| 263 | } else if (sent |
| 264 | && (rpm_vreg_debug_mask & RPM_VREG_DEBUG_FULL_REQUEST)) { |
| 265 | mask[REQ_SENT] = aggr->modified; |
| 266 | mask[REQ_PREV] = aggr->valid & ~aggr->modified; |
| 267 | } else if (sent && (rpm_vreg_debug_mask & RPM_VREG_DEBUG_REQUEST)) { |
| 268 | mask[REQ_SENT] = aggr->modified; |
| 269 | } |
| 270 | |
| 271 | if (!(mask[REQ_SENT] | mask[REQ_PREV])) |
| 272 | return; |
| 273 | |
| 274 | if (set == RPM_SET_SLEEP && !rpm_vreg->sleep_request_sent) { |
| 275 | mask[REQ_CACHED] = mask[REQ_SENT] | mask[REQ_PREV]; |
| 276 | mask[REQ_SENT] = 0; |
| 277 | mask[REQ_PREV] = 0; |
| 278 | } |
| 279 | |
| 280 | pos += scnprintf(buf + pos, buflen - pos, "%s%s: ", |
| 281 | KERN_INFO, __func__); |
| 282 | |
| 283 | pos += scnprintf(buf + pos, buflen - pos, "%s %u (%s): s=%s", |
| 284 | rpm_vreg->resource_name, rpm_vreg->resource_id, |
| 285 | regulator->rdesc.name, |
| 286 | (set == RPM_SET_ACTIVE ? "act" : "slp")); |
| 287 | |
| 288 | for (i = 0; i < REQ_TYPES; i++) { |
| 289 | if (mask[i]) |
| 290 | pos += scnprintf(buf + pos, buflen - pos, "; %s: ", |
| 291 | req_names[i]); |
| 292 | |
| 293 | first = true; |
| 294 | for (j = 0; j < RPM_REGULATOR_PARAM_MAX; j++) { |
| 295 | if (mask[i] & BIT(j)) { |
| 296 | pos += scnprintf(buf + pos, buflen - pos, |
| 297 | "%s%s=%u", (first ? "" : ", "), |
| 298 | params[j].name, aggr->param[j]); |
| 299 | first = false; |
| 300 | } |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | pos += scnprintf(buf + pos, buflen - pos, "\n"); |
| 305 | printk(buf); |
| 306 | } |
| 307 | |
| 308 | #define RPM_VREG_SET_PARAM(_regulator, _param, _val) \ |
| 309 | { \ |
| 310 | (_regulator)->req.param[RPM_REGULATOR_PARAM_##_param] = _val; \ |
| 311 | (_regulator)->req.modified |= BIT(RPM_REGULATOR_PARAM_##_param); \ |
| 312 | } \ |
| 313 | |
| 314 | static int rpm_vreg_add_kvp_to_request(struct rpm_vreg *rpm_vreg, |
| 315 | const u32 *param, int idx, u32 set) |
| 316 | { |
| 317 | struct msm_rpm_request *handle; |
| 318 | |
| 319 | handle = (set == RPM_SET_ACTIVE ? rpm_vreg->handle_active |
| 320 | : rpm_vreg->handle_sleep); |
| 321 | |
| 322 | if (rpm_vreg->allow_atomic) |
| 323 | return msm_rpm_add_kvp_data_noirq(handle, params[idx].key, |
| 324 | (u8 *)¶m[idx], 4); |
| 325 | else |
| 326 | return msm_rpm_add_kvp_data(handle, params[idx].key, |
| 327 | (u8 *)¶m[idx], 4); |
| 328 | } |
| 329 | |
| 330 | static void rpm_vreg_check_modified_requests(const u32 *prev_param, |
| 331 | const u32 *param, u32 prev_valid, u32 *modified) |
| 332 | { |
| 333 | u32 value_changed = 0; |
| 334 | int i; |
| 335 | |
| 336 | for (i = 0; i < RPM_REGULATOR_PARAM_MAX; i++) { |
| 337 | if (param[i] != prev_param[i]) |
| 338 | value_changed |= BIT(i); |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * Only keep bits that are for changed parameters or previously |
| 343 | * invalid parameters. |
| 344 | */ |
| 345 | *modified &= value_changed | ~prev_valid; |
| 346 | } |
| 347 | |
| 348 | static int rpm_vreg_add_modified_requests(struct rpm_regulator *regulator, |
| 349 | u32 set, const u32 *param, u32 modified) |
| 350 | { |
| 351 | struct rpm_vreg *rpm_vreg = regulator->rpm_vreg; |
| 352 | int rc = 0; |
| 353 | int i; |
| 354 | |
| 355 | for (i = 0; i < RPM_REGULATOR_PARAM_MAX; i++) { |
| 356 | /* Only send requests for modified parameters. */ |
| 357 | if (modified & BIT(i)) { |
| 358 | rc = rpm_vreg_add_kvp_to_request(rpm_vreg, param, i, |
| 359 | set); |
| 360 | if (rc) { |
| 361 | vreg_err(regulator, |
| 362 | "add KVP failed: %s %u; %s, rc=%d\n", |
| 363 | rpm_vreg->resource_name, |
| 364 | rpm_vreg->resource_id, params[i].name, |
| 365 | rc); |
| 366 | return rc; |
| 367 | } |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | return rc; |
| 372 | } |
| 373 | |
| 374 | static int rpm_vreg_send_request(struct rpm_regulator *regulator, u32 set) |
| 375 | { |
| 376 | struct rpm_vreg *rpm_vreg = regulator->rpm_vreg; |
| 377 | struct msm_rpm_request *handle |
| 378 | = (set == RPM_SET_ACTIVE ? rpm_vreg->handle_active |
| 379 | : rpm_vreg->handle_sleep); |
| 380 | int rc; |
| 381 | |
| 382 | if (rpm_vreg->allow_atomic) |
| 383 | rc = msm_rpm_wait_for_ack_noirq(msm_rpm_send_request_noirq( |
| 384 | handle)); |
| 385 | else |
| 386 | rc = msm_rpm_wait_for_ack(msm_rpm_send_request(handle)); |
| 387 | |
| 388 | if (rc) |
| 389 | vreg_err(regulator, "msm rpm send failed: %s %u; set=%s, " |
| 390 | "rc=%d\n", rpm_vreg->resource_name, |
| 391 | rpm_vreg->resource_id, |
| 392 | (set == RPM_SET_ACTIVE ? "act" : "slp"), rc); |
| 393 | |
| 394 | return rc; |
| 395 | } |
| 396 | |
David Collins | d1247e0 | 2013-03-05 11:15:30 -0800 | [diff] [blame] | 397 | #define RPM_VREG_AGGR_MIN(_idx, _param_aggr, _param_reg) \ |
| 398 | { \ |
| 399 | _param_aggr[RPM_REGULATOR_PARAM_##_idx] \ |
| 400 | = min(_param_aggr[RPM_REGULATOR_PARAM_##_idx], \ |
| 401 | _param_reg[RPM_REGULATOR_PARAM_##_idx]); \ |
| 402 | } |
| 403 | |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 404 | #define RPM_VREG_AGGR_MAX(_idx, _param_aggr, _param_reg) \ |
| 405 | { \ |
| 406 | _param_aggr[RPM_REGULATOR_PARAM_##_idx] \ |
| 407 | = max(_param_aggr[RPM_REGULATOR_PARAM_##_idx], \ |
| 408 | _param_reg[RPM_REGULATOR_PARAM_##_idx]); \ |
| 409 | } |
| 410 | |
| 411 | #define RPM_VREG_AGGR_SUM(_idx, _param_aggr, _param_reg) \ |
| 412 | { \ |
| 413 | _param_aggr[RPM_REGULATOR_PARAM_##_idx] \ |
| 414 | += _param_reg[RPM_REGULATOR_PARAM_##_idx]; \ |
| 415 | } |
| 416 | |
| 417 | #define RPM_VREG_AGGR_OR(_idx, _param_aggr, _param_reg) \ |
| 418 | { \ |
| 419 | _param_aggr[RPM_REGULATOR_PARAM_##_idx] \ |
| 420 | |= _param_reg[RPM_REGULATOR_PARAM_##_idx]; \ |
| 421 | } |
| 422 | |
| 423 | /* |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 424 | * Aggregation is performed on each parameter based on the way that the RPM |
| 425 | * aggregates that type internally between RPM masters. |
| 426 | */ |
| 427 | static void rpm_vreg_aggregate_params(u32 *param_aggr, const u32 *param_reg) |
| 428 | { |
| 429 | RPM_VREG_AGGR_MAX(ENABLE, param_aggr, param_reg); |
| 430 | RPM_VREG_AGGR_MAX(VOLTAGE, param_aggr, param_reg); |
| 431 | RPM_VREG_AGGR_SUM(CURRENT, param_aggr, param_reg); |
| 432 | RPM_VREG_AGGR_MAX(MODE_LDO, param_aggr, param_reg); |
| 433 | RPM_VREG_AGGR_MAX(MODE_SMPS, param_aggr, param_reg); |
| 434 | RPM_VREG_AGGR_OR(PIN_CTRL_ENABLE, param_aggr, param_reg); |
| 435 | RPM_VREG_AGGR_OR(PIN_CTRL_MODE, param_aggr, param_reg); |
David Collins | d1247e0 | 2013-03-05 11:15:30 -0800 | [diff] [blame] | 436 | RPM_VREG_AGGR_MIN(FREQUENCY, param_aggr, param_reg); |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 437 | RPM_VREG_AGGR_MAX(HEAD_ROOM, param_aggr, param_reg); |
| 438 | RPM_VREG_AGGR_MAX(QUIET_MODE, param_aggr, param_reg); |
| 439 | RPM_VREG_AGGR_MAX(FREQ_REASON, param_aggr, param_reg); |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 440 | RPM_VREG_AGGR_MAX(CORNER, param_aggr, param_reg); |
David Collins | 85b7199 | 2012-07-18 12:00:14 -0700 | [diff] [blame] | 441 | RPM_VREG_AGGR_MAX(BYPASS, param_aggr, param_reg); |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 442 | RPM_VREG_AGGR_MAX(FLOOR_CORNER, param_aggr, param_reg); |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | static int rpm_vreg_aggregate_requests(struct rpm_regulator *regulator) |
| 446 | { |
| 447 | struct rpm_vreg *rpm_vreg = regulator->rpm_vreg; |
| 448 | u32 param_active[RPM_REGULATOR_PARAM_MAX]; |
| 449 | u32 param_sleep[RPM_REGULATOR_PARAM_MAX]; |
| 450 | u32 modified_active, modified_sleep; |
| 451 | struct rpm_regulator *reg; |
| 452 | bool sleep_set_differs = false; |
| 453 | bool send_active = false; |
| 454 | bool send_sleep = false; |
| 455 | int rc = 0; |
| 456 | int i; |
| 457 | |
| 458 | memset(param_active, 0, sizeof(param_active)); |
| 459 | memset(param_sleep, 0, sizeof(param_sleep)); |
| 460 | modified_active = rpm_vreg->aggr_req_active.modified; |
| 461 | modified_sleep = rpm_vreg->aggr_req_sleep.modified; |
| 462 | |
| 463 | /* |
| 464 | * Aggregate all of the requests for this regulator in both active |
| 465 | * and sleep sets. |
| 466 | */ |
| 467 | list_for_each_entry(reg, &rpm_vreg->reg_list, list) { |
| 468 | if (reg->set_active) { |
| 469 | rpm_vreg_aggregate_params(param_active, reg->req.param); |
| 470 | modified_active |= reg->req.modified; |
| 471 | } |
| 472 | if (reg->set_sleep) { |
| 473 | rpm_vreg_aggregate_params(param_sleep, reg->req.param); |
| 474 | modified_sleep |= reg->req.modified; |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | /* |
| 479 | * Check if the aggregated sleep set parameter values differ from the |
| 480 | * aggregated active set parameter values. |
| 481 | */ |
| 482 | if (!rpm_vreg->sleep_request_sent) { |
| 483 | for (i = 0; i < RPM_REGULATOR_PARAM_MAX; i++) { |
| 484 | if ((param_active[i] != param_sleep[i]) |
| 485 | && (modified_sleep & BIT(i))) { |
| 486 | sleep_set_differs = true; |
| 487 | break; |
| 488 | } |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | /* Add KVPs to the active set RPM request if they have new values. */ |
| 493 | rpm_vreg_check_modified_requests(rpm_vreg->aggr_req_active.param, |
| 494 | param_active, rpm_vreg->aggr_req_active.valid, |
| 495 | &modified_active); |
| 496 | rc = rpm_vreg_add_modified_requests(regulator, RPM_SET_ACTIVE, |
| 497 | param_active, modified_active); |
| 498 | if (rc) |
| 499 | return rc; |
| 500 | send_active = modified_active; |
| 501 | |
| 502 | /* |
| 503 | * Sleep set configurations are only sent if they differ from the |
| 504 | * active set values. This is because the active set values will take |
| 505 | * effect during rpm assisted power collapse in the absence of sleep set |
| 506 | * values. |
| 507 | * |
| 508 | * However, once a sleep set request is sent for a given regulator, |
| 509 | * additional sleep set requests must be sent in the future even if they |
| 510 | * match the corresponding active set requests. |
| 511 | */ |
| 512 | if (rpm_vreg->sleep_request_sent || sleep_set_differs) { |
| 513 | /* Add KVPs to the sleep set RPM request if they are new. */ |
| 514 | rpm_vreg_check_modified_requests(rpm_vreg->aggr_req_sleep.param, |
| 515 | param_sleep, rpm_vreg->aggr_req_sleep.valid, |
| 516 | &modified_sleep); |
| 517 | rc = rpm_vreg_add_modified_requests(regulator, RPM_SET_SLEEP, |
| 518 | param_sleep, modified_sleep); |
| 519 | if (rc) |
| 520 | return rc; |
| 521 | send_sleep = modified_sleep; |
| 522 | } |
| 523 | |
| 524 | /* Send active set request to the RPM if it contains new KVPs. */ |
| 525 | if (send_active) { |
| 526 | rc = rpm_vreg_send_request(regulator, RPM_SET_ACTIVE); |
| 527 | if (rc) |
| 528 | return rc; |
| 529 | rpm_vreg->aggr_req_active.valid |= modified_active; |
| 530 | } |
| 531 | /* Store the results of the aggregation. */ |
| 532 | rpm_vreg->aggr_req_active.modified = modified_active; |
| 533 | memcpy(rpm_vreg->aggr_req_active.param, param_active, |
| 534 | sizeof(param_active)); |
| 535 | |
| 536 | /* Handle debug printing of the active set request. */ |
| 537 | rpm_regulator_req(regulator, RPM_SET_ACTIVE, send_active); |
| 538 | if (send_active) |
| 539 | rpm_vreg->aggr_req_active.modified = 0; |
| 540 | |
| 541 | /* Send sleep set request to the RPM if it contains new KVPs. */ |
| 542 | if (send_sleep) { |
| 543 | rc = rpm_vreg_send_request(regulator, RPM_SET_SLEEP); |
| 544 | if (rc) |
| 545 | return rc; |
| 546 | else |
| 547 | rpm_vreg->sleep_request_sent = true; |
| 548 | rpm_vreg->aggr_req_sleep.valid |= modified_sleep; |
| 549 | } |
| 550 | /* Store the results of the aggregation. */ |
| 551 | rpm_vreg->aggr_req_sleep.modified = modified_sleep; |
| 552 | memcpy(rpm_vreg->aggr_req_sleep.param, param_sleep, |
| 553 | sizeof(param_sleep)); |
| 554 | |
| 555 | /* Handle debug printing of the sleep set request. */ |
| 556 | rpm_regulator_req(regulator, RPM_SET_SLEEP, send_sleep); |
| 557 | if (send_sleep) |
| 558 | rpm_vreg->aggr_req_sleep.modified = 0; |
| 559 | |
| 560 | /* |
| 561 | * Loop over all requests for this regulator to update the valid and |
| 562 | * modified values for use in future aggregation. |
| 563 | */ |
| 564 | list_for_each_entry(reg, &rpm_vreg->reg_list, list) { |
| 565 | reg->req.valid |= reg->req.modified; |
| 566 | reg->req.modified = 0; |
| 567 | } |
| 568 | |
| 569 | return rc; |
| 570 | } |
| 571 | |
| 572 | static int rpm_vreg_is_enabled(struct regulator_dev *rdev) |
| 573 | { |
| 574 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 575 | |
| 576 | return reg->req.param[RPM_REGULATOR_PARAM_ENABLE]; |
| 577 | } |
| 578 | |
| 579 | static int rpm_vreg_enable(struct regulator_dev *rdev) |
| 580 | { |
| 581 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 582 | int rc; |
| 583 | u32 prev_enable; |
| 584 | |
| 585 | rpm_vreg_lock(reg->rpm_vreg); |
| 586 | |
| 587 | prev_enable = reg->req.param[RPM_REGULATOR_PARAM_ENABLE]; |
| 588 | RPM_VREG_SET_PARAM(reg, ENABLE, 1); |
| 589 | rc = rpm_vreg_aggregate_requests(reg); |
| 590 | if (rc) { |
| 591 | vreg_err(reg, "enable failed, rc=%d", rc); |
| 592 | RPM_VREG_SET_PARAM(reg, ENABLE, prev_enable); |
| 593 | } |
| 594 | |
| 595 | rpm_vreg_unlock(reg->rpm_vreg); |
| 596 | |
| 597 | return rc; |
| 598 | } |
| 599 | |
| 600 | static int rpm_vreg_disable(struct regulator_dev *rdev) |
| 601 | { |
| 602 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 603 | int rc; |
| 604 | u32 prev_enable; |
| 605 | |
| 606 | rpm_vreg_lock(reg->rpm_vreg); |
| 607 | |
| 608 | prev_enable = reg->req.param[RPM_REGULATOR_PARAM_ENABLE]; |
| 609 | RPM_VREG_SET_PARAM(reg, ENABLE, 0); |
| 610 | rc = rpm_vreg_aggregate_requests(reg); |
| 611 | if (rc) { |
| 612 | vreg_err(reg, "enable failed, rc=%d", rc); |
| 613 | RPM_VREG_SET_PARAM(reg, ENABLE, prev_enable); |
| 614 | } |
| 615 | |
| 616 | rpm_vreg_unlock(reg->rpm_vreg); |
| 617 | |
| 618 | return rc; |
| 619 | } |
| 620 | |
| 621 | static int rpm_vreg_set_voltage(struct regulator_dev *rdev, int min_uV, |
| 622 | int max_uV, unsigned *selector) |
| 623 | { |
| 624 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 625 | int rc = 0; |
| 626 | u32 prev_voltage; |
| 627 | |
| 628 | rpm_vreg_lock(reg->rpm_vreg); |
| 629 | |
| 630 | prev_voltage = reg->req.param[RPM_REGULATOR_PARAM_VOLTAGE]; |
| 631 | RPM_VREG_SET_PARAM(reg, VOLTAGE, min_uV); |
| 632 | |
David Collins | 409a9fa | 2013-03-05 10:54:25 -0800 | [diff] [blame] | 633 | /* |
| 634 | * Only send a new voltage if the regulator is currently enabled or |
| 635 | * if the regulator has been configured to always send voltage updates. |
| 636 | */ |
| 637 | if (reg->always_send_voltage |
| 638 | || rpm_vreg_active_or_sleep_enabled(reg->rpm_vreg)) |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 639 | rc = rpm_vreg_aggregate_requests(reg); |
| 640 | |
| 641 | if (rc) { |
| 642 | vreg_err(reg, "set voltage failed, rc=%d", rc); |
| 643 | RPM_VREG_SET_PARAM(reg, VOLTAGE, prev_voltage); |
| 644 | } |
| 645 | |
| 646 | rpm_vreg_unlock(reg->rpm_vreg); |
| 647 | |
| 648 | return rc; |
| 649 | } |
| 650 | |
| 651 | static int rpm_vreg_get_voltage(struct regulator_dev *rdev) |
| 652 | { |
| 653 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 654 | int uV; |
| 655 | |
| 656 | uV = reg->req.param[RPM_REGULATOR_PARAM_VOLTAGE]; |
| 657 | if (uV == 0) |
| 658 | uV = VOLTAGE_UNKNOWN; |
| 659 | |
| 660 | return uV; |
| 661 | } |
| 662 | |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 663 | static int rpm_vreg_set_voltage_corner(struct regulator_dev *rdev, int min_uV, |
| 664 | int max_uV, unsigned *selector) |
| 665 | { |
| 666 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 667 | int rc = 0; |
| 668 | int corner; |
| 669 | u32 prev_corner; |
| 670 | |
| 671 | /* |
| 672 | * Translate from values which work as inputs in the |
| 673 | * regulator_set_voltage function to the actual corner values |
| 674 | * sent to the RPM. |
| 675 | */ |
David Collins | 71c1899 | 2012-07-18 11:25:24 -0700 | [diff] [blame] | 676 | corner = min_uV - RPM_REGULATOR_CORNER_NONE; |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 677 | |
| 678 | if (corner < params[RPM_REGULATOR_PARAM_CORNER].min |
| 679 | || corner > params[RPM_REGULATOR_PARAM_CORNER].max) { |
| 680 | vreg_err(reg, "corner=%d is not within allowed range: [%u, %u]\n", |
| 681 | corner, params[RPM_REGULATOR_PARAM_CORNER].min, |
| 682 | params[RPM_REGULATOR_PARAM_CORNER].max); |
| 683 | return -EINVAL; |
| 684 | } |
| 685 | |
| 686 | rpm_vreg_lock(reg->rpm_vreg); |
| 687 | |
| 688 | prev_corner = reg->req.param[RPM_REGULATOR_PARAM_CORNER]; |
| 689 | RPM_VREG_SET_PARAM(reg, CORNER, corner); |
| 690 | |
David Collins | 409a9fa | 2013-03-05 10:54:25 -0800 | [diff] [blame] | 691 | /* |
| 692 | * Only send a new voltage corner if the regulator is currently enabled |
| 693 | * or if the regulator has been configured to always send voltage |
| 694 | * updates. |
| 695 | */ |
| 696 | if (reg->always_send_voltage |
| 697 | || rpm_vreg_active_or_sleep_enabled(reg->rpm_vreg)) |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 698 | rc = rpm_vreg_aggregate_requests(reg); |
| 699 | |
| 700 | if (rc) { |
| 701 | vreg_err(reg, "set voltage corner failed, rc=%d", rc); |
| 702 | RPM_VREG_SET_PARAM(reg, CORNER, prev_corner); |
| 703 | } |
| 704 | |
| 705 | rpm_vreg_unlock(reg->rpm_vreg); |
| 706 | |
| 707 | return rc; |
| 708 | } |
| 709 | |
| 710 | static int rpm_vreg_get_voltage_corner(struct regulator_dev *rdev) |
| 711 | { |
| 712 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 713 | |
| 714 | return reg->req.param[RPM_REGULATOR_PARAM_CORNER] |
David Collins | 71c1899 | 2012-07-18 11:25:24 -0700 | [diff] [blame] | 715 | + RPM_REGULATOR_CORNER_NONE; |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 716 | } |
| 717 | |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 718 | static int rpm_vreg_set_voltage_floor_corner(struct regulator_dev *rdev, |
| 719 | int min_uV, int max_uV, unsigned *selector) |
| 720 | { |
| 721 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 722 | int rc = 0; |
| 723 | int corner; |
| 724 | u32 prev_corner; |
| 725 | |
| 726 | /* |
| 727 | * Translate from values which work as inputs in the |
| 728 | * regulator_set_voltage function to the actual corner values |
| 729 | * sent to the RPM. |
| 730 | */ |
| 731 | corner = min_uV - RPM_REGULATOR_CORNER_NONE; |
| 732 | |
| 733 | if (corner < params[RPM_REGULATOR_PARAM_FLOOR_CORNER].min |
| 734 | || corner > params[RPM_REGULATOR_PARAM_FLOOR_CORNER].max) { |
| 735 | vreg_err(reg, "corner=%d is not within allowed range: [%u, %u]\n", |
| 736 | corner, params[RPM_REGULATOR_PARAM_FLOOR_CORNER].min, |
| 737 | params[RPM_REGULATOR_PARAM_FLOOR_CORNER].max); |
| 738 | return -EINVAL; |
| 739 | } |
| 740 | |
| 741 | rpm_vreg_lock(reg->rpm_vreg); |
| 742 | |
| 743 | prev_corner = reg->req.param[RPM_REGULATOR_PARAM_FLOOR_CORNER]; |
| 744 | RPM_VREG_SET_PARAM(reg, FLOOR_CORNER, corner); |
| 745 | |
David Collins | 409a9fa | 2013-03-05 10:54:25 -0800 | [diff] [blame] | 746 | /* |
| 747 | * Only send a new voltage floor corner if the regulator is currently |
| 748 | * enabled or if the regulator has been configured to always send |
| 749 | * voltage updates. |
| 750 | */ |
| 751 | if (reg->always_send_voltage |
| 752 | || rpm_vreg_active_or_sleep_enabled(reg->rpm_vreg)) |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 753 | rc = rpm_vreg_aggregate_requests(reg); |
| 754 | |
| 755 | if (rc) { |
| 756 | vreg_err(reg, "set voltage corner failed, rc=%d", rc); |
| 757 | RPM_VREG_SET_PARAM(reg, FLOOR_CORNER, prev_corner); |
| 758 | } |
| 759 | |
| 760 | rpm_vreg_unlock(reg->rpm_vreg); |
| 761 | |
| 762 | return rc; |
| 763 | } |
| 764 | |
| 765 | static int rpm_vreg_get_voltage_floor_corner(struct regulator_dev *rdev) |
| 766 | { |
| 767 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 768 | |
| 769 | return reg->req.param[RPM_REGULATOR_PARAM_FLOOR_CORNER] |
| 770 | + RPM_REGULATOR_CORNER_NONE; |
| 771 | } |
| 772 | |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 773 | static int rpm_vreg_set_mode(struct regulator_dev *rdev, unsigned int mode) |
| 774 | { |
| 775 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 776 | int rc = 0; |
| 777 | u32 prev_current; |
| 778 | int prev_uA; |
| 779 | |
| 780 | rpm_vreg_lock(reg->rpm_vreg); |
| 781 | |
| 782 | prev_current = reg->req.param[RPM_REGULATOR_PARAM_CURRENT]; |
| 783 | prev_uA = MILLI_TO_MICRO(prev_current); |
| 784 | |
| 785 | if (mode == REGULATOR_MODE_NORMAL) { |
| 786 | /* Make sure that request current is in HPM range. */ |
| 787 | if (prev_uA < rpm_vreg_hpm_min_uA(reg->rpm_vreg)) |
| 788 | RPM_VREG_SET_PARAM(reg, CURRENT, |
| 789 | MICRO_TO_MILLI(rpm_vreg_hpm_min_uA(reg->rpm_vreg))); |
| 790 | } else if (REGULATOR_MODE_IDLE) { |
| 791 | /* Make sure that request current is in LPM range. */ |
| 792 | if (prev_uA > rpm_vreg_lpm_max_uA(reg->rpm_vreg)) |
| 793 | RPM_VREG_SET_PARAM(reg, CURRENT, |
| 794 | MICRO_TO_MILLI(rpm_vreg_lpm_max_uA(reg->rpm_vreg))); |
| 795 | } else { |
| 796 | vreg_err(reg, "invalid mode: %u\n", mode); |
| 797 | rpm_vreg_unlock(reg->rpm_vreg); |
| 798 | return -EINVAL; |
| 799 | } |
| 800 | |
David Collins | 409a9fa | 2013-03-05 10:54:25 -0800 | [diff] [blame] | 801 | /* |
| 802 | * Only send a new load current value if the regulator is currently |
| 803 | * enabled or if the regulator has been configured to always send |
| 804 | * current updates. |
| 805 | */ |
| 806 | if (reg->always_send_current |
| 807 | || rpm_vreg_active_or_sleep_enabled(reg->rpm_vreg)) |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 808 | rc = rpm_vreg_aggregate_requests(reg); |
| 809 | |
| 810 | if (rc) { |
| 811 | vreg_err(reg, "set mode failed, rc=%d", rc); |
| 812 | RPM_VREG_SET_PARAM(reg, CURRENT, prev_current); |
| 813 | } |
| 814 | |
| 815 | rpm_vreg_unlock(reg->rpm_vreg); |
| 816 | |
| 817 | return rc; |
| 818 | } |
| 819 | |
| 820 | static unsigned int rpm_vreg_get_mode(struct regulator_dev *rdev) |
| 821 | { |
| 822 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 823 | |
| 824 | return (reg->req.param[RPM_REGULATOR_PARAM_CURRENT] |
| 825 | >= MICRO_TO_MILLI(reg->rpm_vreg->hpm_min_load)) |
| 826 | ? REGULATOR_MODE_NORMAL : REGULATOR_MODE_IDLE; |
| 827 | } |
| 828 | |
| 829 | static unsigned int rpm_vreg_get_optimum_mode(struct regulator_dev *rdev, |
| 830 | int input_uV, int output_uV, int load_uA) |
| 831 | { |
| 832 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 833 | u32 load_mA; |
| 834 | |
| 835 | load_uA += reg->system_load; |
| 836 | |
| 837 | load_mA = MICRO_TO_MILLI(load_uA); |
| 838 | if (load_mA > params[RPM_REGULATOR_PARAM_CURRENT].max) |
| 839 | load_mA = params[RPM_REGULATOR_PARAM_CURRENT].max; |
| 840 | |
| 841 | rpm_vreg_lock(reg->rpm_vreg); |
| 842 | RPM_VREG_SET_PARAM(reg, CURRENT, MICRO_TO_MILLI(load_uA)); |
| 843 | rpm_vreg_unlock(reg->rpm_vreg); |
| 844 | |
| 845 | return (load_uA >= reg->rpm_vreg->hpm_min_load) |
| 846 | ? REGULATOR_MODE_NORMAL : REGULATOR_MODE_IDLE; |
| 847 | } |
| 848 | |
| 849 | static int rpm_vreg_enable_time(struct regulator_dev *rdev) |
| 850 | { |
| 851 | struct rpm_regulator *reg = rdev_get_drvdata(rdev); |
| 852 | |
| 853 | return reg->rpm_vreg->enable_time; |
| 854 | } |
| 855 | |
| 856 | /** |
| 857 | * rpm_regulator_get() - lookup and obtain a handle to an RPM regulator |
| 858 | * @dev: device for regulator consumer |
| 859 | * @supply: supply name |
| 860 | * |
| 861 | * Returns a struct rpm_regulator corresponding to the regulator producer, |
| 862 | * or ERR_PTR() containing errno. |
| 863 | * |
| 864 | * This function may only be called from nonatomic context. |
| 865 | */ |
| 866 | struct rpm_regulator *rpm_regulator_get(struct device *dev, const char *supply) |
| 867 | { |
| 868 | struct rpm_regulator *framework_reg; |
| 869 | struct rpm_regulator *priv_reg = NULL; |
| 870 | struct regulator *regulator; |
| 871 | struct rpm_vreg *rpm_vreg; |
| 872 | |
| 873 | regulator = regulator_get(dev, supply); |
David Collins | 29ba028 | 2012-06-18 10:01:52 -0700 | [diff] [blame] | 874 | if (IS_ERR(regulator)) { |
| 875 | pr_err("could not find regulator for: dev=%s, supply=%s, rc=%ld\n", |
| 876 | (dev ? dev_name(dev) : ""), (supply ? supply : ""), |
| 877 | PTR_ERR(regulator)); |
| 878 | return ERR_CAST(regulator); |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 879 | } |
| 880 | |
| 881 | framework_reg = regulator_get_drvdata(regulator); |
| 882 | if (framework_reg == NULL) { |
| 883 | pr_err("regulator structure not found.\n"); |
| 884 | regulator_put(regulator); |
| 885 | return ERR_PTR(-ENODEV); |
| 886 | } |
| 887 | regulator_put(regulator); |
| 888 | |
| 889 | rpm_vreg = framework_reg->rpm_vreg; |
| 890 | |
| 891 | priv_reg = kzalloc(sizeof(struct rpm_regulator), GFP_KERNEL); |
| 892 | if (priv_reg == NULL) { |
| 893 | vreg_err(framework_reg, "could not allocate memory for " |
| 894 | "regulator\n"); |
| 895 | rpm_vreg_unlock(rpm_vreg); |
| 896 | return ERR_PTR(-ENOMEM); |
| 897 | } |
| 898 | |
| 899 | /* |
| 900 | * Allocate a regulator_dev struct so that framework callback functions |
| 901 | * can be called from the private API functions. |
| 902 | */ |
| 903 | priv_reg->rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); |
| 904 | if (priv_reg->rdev == NULL) { |
| 905 | vreg_err(framework_reg, "could not allocate memory for " |
| 906 | "regulator_dev\n"); |
| 907 | kfree(priv_reg); |
| 908 | rpm_vreg_unlock(rpm_vreg); |
| 909 | return ERR_PTR(-ENOMEM); |
| 910 | } |
| 911 | priv_reg->rdev->reg_data = priv_reg; |
| 912 | priv_reg->rpm_vreg = rpm_vreg; |
| 913 | priv_reg->rdesc.name = framework_reg->rdesc.name; |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 914 | priv_reg->rdesc.ops = framework_reg->rdesc.ops; |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 915 | priv_reg->set_active = framework_reg->set_active; |
| 916 | priv_reg->set_sleep = framework_reg->set_sleep; |
| 917 | priv_reg->min_uV = framework_reg->min_uV; |
| 918 | priv_reg->max_uV = framework_reg->max_uV; |
| 919 | priv_reg->system_load = framework_reg->system_load; |
| 920 | |
| 921 | might_sleep_if(!rpm_vreg->allow_atomic); |
| 922 | rpm_vreg_lock(rpm_vreg); |
| 923 | list_add(&priv_reg->list, &rpm_vreg->reg_list); |
| 924 | rpm_vreg_unlock(rpm_vreg); |
| 925 | |
| 926 | return priv_reg; |
| 927 | } |
| 928 | EXPORT_SYMBOL_GPL(rpm_regulator_get); |
| 929 | |
| 930 | static int rpm_regulator_check_input(struct rpm_regulator *regulator) |
| 931 | { |
David Collins | 29ba028 | 2012-06-18 10:01:52 -0700 | [diff] [blame] | 932 | if (IS_ERR_OR_NULL(regulator) || regulator->rpm_vreg == NULL) { |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 933 | pr_err("invalid rpm_regulator pointer\n"); |
| 934 | return -EINVAL; |
| 935 | } |
| 936 | |
| 937 | might_sleep_if(!regulator->rpm_vreg->allow_atomic); |
| 938 | |
| 939 | return 0; |
| 940 | } |
| 941 | |
| 942 | /** |
| 943 | * rpm_regulator_put() - free the RPM regulator handle |
| 944 | * @regulator: RPM regulator handle |
| 945 | * |
| 946 | * Parameter reaggregation does not take place when rpm_regulator_put is called. |
| 947 | * Therefore, regulator enable state and voltage must be configured |
| 948 | * appropriately before calling rpm_regulator_put. |
| 949 | * |
| 950 | * This function may be called from either atomic or nonatomic context. If this |
| 951 | * function is called from atomic context, then the regulator being operated on |
| 952 | * must be configured via device tree with qcom,allow-atomic == 1. |
| 953 | */ |
| 954 | void rpm_regulator_put(struct rpm_regulator *regulator) |
| 955 | { |
| 956 | struct rpm_vreg *rpm_vreg; |
| 957 | int rc = rpm_regulator_check_input(regulator); |
| 958 | |
| 959 | if (rc) |
| 960 | return; |
| 961 | |
| 962 | rpm_vreg = regulator->rpm_vreg; |
| 963 | |
| 964 | might_sleep_if(!rpm_vreg->allow_atomic); |
| 965 | rpm_vreg_lock(rpm_vreg); |
| 966 | list_del(®ulator->list); |
| 967 | rpm_vreg_unlock(rpm_vreg); |
| 968 | |
| 969 | kfree(regulator->rdev); |
| 970 | kfree(regulator); |
| 971 | } |
| 972 | EXPORT_SYMBOL_GPL(rpm_regulator_put); |
| 973 | |
| 974 | /** |
| 975 | * rpm_regulator_enable() - enable regulator output |
| 976 | * @regulator: RPM regulator handle |
| 977 | * |
| 978 | * Returns 0 on success or errno on failure. |
| 979 | * |
| 980 | * This function may be called from either atomic or nonatomic context. If this |
| 981 | * function is called from atomic context, then the regulator being operated on |
| 982 | * must be configured via device tree with qcom,allow-atomic == 1. |
| 983 | */ |
| 984 | int rpm_regulator_enable(struct rpm_regulator *regulator) |
| 985 | { |
| 986 | int rc = rpm_regulator_check_input(regulator); |
| 987 | |
| 988 | if (rc) |
| 989 | return rc; |
| 990 | |
| 991 | return rpm_vreg_enable(regulator->rdev); |
| 992 | } |
| 993 | EXPORT_SYMBOL_GPL(rpm_regulator_enable); |
| 994 | |
| 995 | /** |
| 996 | * rpm_regulator_disable() - disable regulator output |
| 997 | * @regulator: RPM regulator handle |
| 998 | * |
| 999 | * Returns 0 on success or errno on failure. |
| 1000 | * |
| 1001 | * The enable state of the regulator is determined by aggregating the requests |
| 1002 | * of all consumers. Therefore, it is possible that the regulator will remain |
| 1003 | * enabled even after rpm_regulator_disable is called. |
| 1004 | * |
| 1005 | * This function may be called from either atomic or nonatomic context. If this |
| 1006 | * function is called from atomic context, then the regulator being operated on |
| 1007 | * must be configured via device tree with qcom,allow-atomic == 1. |
| 1008 | */ |
| 1009 | int rpm_regulator_disable(struct rpm_regulator *regulator) |
| 1010 | { |
| 1011 | int rc = rpm_regulator_check_input(regulator); |
| 1012 | |
| 1013 | if (rc) |
| 1014 | return rc; |
| 1015 | |
| 1016 | return rpm_vreg_disable(regulator->rdev); |
| 1017 | } |
| 1018 | EXPORT_SYMBOL_GPL(rpm_regulator_disable); |
| 1019 | |
| 1020 | /** |
| 1021 | * rpm_regulator_set_voltage() - set regulator output voltage |
| 1022 | * @regulator: RPM regulator handle |
| 1023 | * @min_uV: minimum required voltage in uV |
| 1024 | * @max_uV: maximum acceptable voltage in uV |
| 1025 | * |
| 1026 | * Sets a voltage regulator to the desired output voltage. This can be set |
| 1027 | * while the regulator is disabled or enabled. If the regulator is enabled then |
| 1028 | * the voltage will change to the new value immediately; otherwise, if the |
| 1029 | * regulator is disabled, then the regulator will output at the new voltage when |
| 1030 | * enabled. |
| 1031 | * |
| 1032 | * The min_uV to max_uV voltage range requested must intersect with the |
| 1033 | * voltage constraint range configured for the regulator. |
| 1034 | * |
| 1035 | * Returns 0 on success or errno on failure. |
| 1036 | * |
| 1037 | * The final voltage value that is sent to the RPM is aggregated based upon the |
| 1038 | * values requested by all consumers of the regulator. This corresponds to the |
| 1039 | * maximum min_uV value. |
| 1040 | * |
| 1041 | * This function may be called from either atomic or nonatomic context. If this |
| 1042 | * function is called from atomic context, then the regulator being operated on |
| 1043 | * must be configured via device tree with qcom,allow-atomic == 1. |
| 1044 | */ |
| 1045 | int rpm_regulator_set_voltage(struct rpm_regulator *regulator, int min_uV, |
| 1046 | int max_uV) |
| 1047 | { |
| 1048 | int rc = rpm_regulator_check_input(regulator); |
| 1049 | int uV = min_uV; |
| 1050 | |
| 1051 | if (rc) |
| 1052 | return rc; |
| 1053 | |
| 1054 | if (regulator->rpm_vreg->regulator_type == RPM_REGULATOR_SMD_TYPE_VS) { |
| 1055 | vreg_err(regulator, "unsupported regulator type: %d\n", |
| 1056 | regulator->rpm_vreg->regulator_type); |
| 1057 | return -EINVAL; |
| 1058 | } |
| 1059 | |
| 1060 | if (min_uV > max_uV) { |
| 1061 | vreg_err(regulator, "min_uV=%d must be less than max_uV=%d\n", |
| 1062 | min_uV, max_uV); |
| 1063 | return -EINVAL; |
| 1064 | } |
| 1065 | |
| 1066 | if (uV < regulator->min_uV && max_uV >= regulator->min_uV) |
| 1067 | uV = regulator->min_uV; |
| 1068 | |
| 1069 | if (uV < regulator->min_uV || uV > regulator->max_uV) { |
| 1070 | vreg_err(regulator, "request v=[%d, %d] is outside allowed " |
| 1071 | "v=[%d, %d]\n", min_uV, max_uV, regulator->min_uV, |
| 1072 | regulator->max_uV); |
| 1073 | return -EINVAL; |
| 1074 | } |
| 1075 | |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 1076 | return regulator->rdesc.ops->set_voltage(regulator->rdev, uV, uV, NULL); |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1077 | } |
| 1078 | EXPORT_SYMBOL_GPL(rpm_regulator_set_voltage); |
| 1079 | |
| 1080 | static struct regulator_ops ldo_ops = { |
| 1081 | .enable = rpm_vreg_enable, |
| 1082 | .disable = rpm_vreg_disable, |
| 1083 | .is_enabled = rpm_vreg_is_enabled, |
| 1084 | .set_voltage = rpm_vreg_set_voltage, |
| 1085 | .get_voltage = rpm_vreg_get_voltage, |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1086 | .set_mode = rpm_vreg_set_mode, |
| 1087 | .get_mode = rpm_vreg_get_mode, |
| 1088 | .get_optimum_mode = rpm_vreg_get_optimum_mode, |
| 1089 | .enable_time = rpm_vreg_enable_time, |
| 1090 | }; |
| 1091 | |
David Collins | 23c96cd | 2012-10-05 17:12:00 -0700 | [diff] [blame] | 1092 | static struct regulator_ops ldo_corner_ops = { |
| 1093 | .enable = rpm_vreg_enable, |
| 1094 | .disable = rpm_vreg_disable, |
| 1095 | .is_enabled = rpm_vreg_is_enabled, |
| 1096 | .set_voltage = rpm_vreg_set_voltage_corner, |
| 1097 | .get_voltage = rpm_vreg_get_voltage_corner, |
David Collins | 23c96cd | 2012-10-05 17:12:00 -0700 | [diff] [blame] | 1098 | .set_mode = rpm_vreg_set_mode, |
| 1099 | .get_mode = rpm_vreg_get_mode, |
| 1100 | .get_optimum_mode = rpm_vreg_get_optimum_mode, |
| 1101 | .enable_time = rpm_vreg_enable_time, |
| 1102 | }; |
| 1103 | |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 1104 | static struct regulator_ops ldo_floor_corner_ops = { |
| 1105 | .enable = rpm_vreg_enable, |
| 1106 | .disable = rpm_vreg_disable, |
| 1107 | .is_enabled = rpm_vreg_is_enabled, |
| 1108 | .set_voltage = rpm_vreg_set_voltage_floor_corner, |
| 1109 | .get_voltage = rpm_vreg_get_voltage_floor_corner, |
| 1110 | .set_mode = rpm_vreg_set_mode, |
| 1111 | .get_mode = rpm_vreg_get_mode, |
| 1112 | .get_optimum_mode = rpm_vreg_get_optimum_mode, |
| 1113 | .enable_time = rpm_vreg_enable_time, |
| 1114 | }; |
| 1115 | |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1116 | static struct regulator_ops smps_ops = { |
| 1117 | .enable = rpm_vreg_enable, |
| 1118 | .disable = rpm_vreg_disable, |
| 1119 | .is_enabled = rpm_vreg_is_enabled, |
| 1120 | .set_voltage = rpm_vreg_set_voltage, |
| 1121 | .get_voltage = rpm_vreg_get_voltage, |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1122 | .set_mode = rpm_vreg_set_mode, |
| 1123 | .get_mode = rpm_vreg_get_mode, |
| 1124 | .get_optimum_mode = rpm_vreg_get_optimum_mode, |
| 1125 | .enable_time = rpm_vreg_enable_time, |
| 1126 | }; |
| 1127 | |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 1128 | static struct regulator_ops smps_corner_ops = { |
| 1129 | .enable = rpm_vreg_enable, |
| 1130 | .disable = rpm_vreg_disable, |
| 1131 | .is_enabled = rpm_vreg_is_enabled, |
| 1132 | .set_voltage = rpm_vreg_set_voltage_corner, |
| 1133 | .get_voltage = rpm_vreg_get_voltage_corner, |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 1134 | .set_mode = rpm_vreg_set_mode, |
| 1135 | .get_mode = rpm_vreg_get_mode, |
| 1136 | .get_optimum_mode = rpm_vreg_get_optimum_mode, |
| 1137 | .enable_time = rpm_vreg_enable_time, |
| 1138 | }; |
| 1139 | |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 1140 | static struct regulator_ops smps_floor_corner_ops = { |
| 1141 | .enable = rpm_vreg_enable, |
| 1142 | .disable = rpm_vreg_disable, |
| 1143 | .is_enabled = rpm_vreg_is_enabled, |
| 1144 | .set_voltage = rpm_vreg_set_voltage_floor_corner, |
| 1145 | .get_voltage = rpm_vreg_get_voltage_floor_corner, |
| 1146 | .set_mode = rpm_vreg_set_mode, |
| 1147 | .get_mode = rpm_vreg_get_mode, |
| 1148 | .get_optimum_mode = rpm_vreg_get_optimum_mode, |
| 1149 | .enable_time = rpm_vreg_enable_time, |
| 1150 | }; |
| 1151 | |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1152 | static struct regulator_ops switch_ops = { |
| 1153 | .enable = rpm_vreg_enable, |
| 1154 | .disable = rpm_vreg_disable, |
| 1155 | .is_enabled = rpm_vreg_is_enabled, |
| 1156 | .enable_time = rpm_vreg_enable_time, |
| 1157 | }; |
| 1158 | |
| 1159 | static struct regulator_ops ncp_ops = { |
| 1160 | .enable = rpm_vreg_enable, |
| 1161 | .disable = rpm_vreg_disable, |
| 1162 | .is_enabled = rpm_vreg_is_enabled, |
| 1163 | .set_voltage = rpm_vreg_set_voltage, |
| 1164 | .get_voltage = rpm_vreg_get_voltage, |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1165 | .enable_time = rpm_vreg_enable_time, |
| 1166 | }; |
| 1167 | |
| 1168 | static struct regulator_ops *vreg_ops[] = { |
| 1169 | [RPM_REGULATOR_SMD_TYPE_LDO] = &ldo_ops, |
| 1170 | [RPM_REGULATOR_SMD_TYPE_SMPS] = &smps_ops, |
| 1171 | [RPM_REGULATOR_SMD_TYPE_VS] = &switch_ops, |
| 1172 | [RPM_REGULATOR_SMD_TYPE_NCP] = &ncp_ops, |
| 1173 | }; |
| 1174 | |
| 1175 | static int __devexit rpm_vreg_device_remove(struct platform_device *pdev) |
| 1176 | { |
| 1177 | struct device *dev = &pdev->dev; |
| 1178 | struct rpm_regulator *reg; |
| 1179 | |
| 1180 | reg = platform_get_drvdata(pdev); |
| 1181 | if (reg) { |
| 1182 | rpm_vreg_lock(reg->rpm_vreg); |
| 1183 | regulator_unregister(reg->rdev); |
| 1184 | list_del(®->list); |
| 1185 | kfree(reg); |
| 1186 | rpm_vreg_unlock(reg->rpm_vreg); |
| 1187 | } else { |
| 1188 | dev_err(dev, "%s: drvdata missing\n", __func__); |
| 1189 | return -EINVAL; |
| 1190 | } |
| 1191 | |
| 1192 | platform_set_drvdata(pdev, NULL); |
| 1193 | |
| 1194 | return 0; |
| 1195 | } |
| 1196 | |
| 1197 | static int __devexit rpm_vreg_resource_remove(struct platform_device *pdev) |
| 1198 | { |
| 1199 | struct device *dev = &pdev->dev; |
| 1200 | struct rpm_regulator *reg, *reg_temp; |
| 1201 | struct rpm_vreg *rpm_vreg; |
| 1202 | |
| 1203 | rpm_vreg = platform_get_drvdata(pdev); |
| 1204 | if (rpm_vreg) { |
| 1205 | rpm_vreg_lock(rpm_vreg); |
| 1206 | list_for_each_entry_safe(reg, reg_temp, &rpm_vreg->reg_list, |
| 1207 | list) { |
| 1208 | /* Only touch data for private consumers. */ |
| 1209 | if (reg->rdev->desc == NULL) { |
| 1210 | list_del(®->list); |
| 1211 | kfree(reg->rdev); |
| 1212 | kfree(reg); |
| 1213 | } else { |
| 1214 | dev_err(dev, "%s: not all child devices have " |
| 1215 | "been removed\n", __func__); |
| 1216 | } |
| 1217 | } |
| 1218 | rpm_vreg_unlock(rpm_vreg); |
| 1219 | |
| 1220 | msm_rpm_free_request(rpm_vreg->handle_active); |
| 1221 | msm_rpm_free_request(rpm_vreg->handle_sleep); |
| 1222 | |
| 1223 | kfree(rpm_vreg); |
| 1224 | } else { |
| 1225 | dev_err(dev, "%s: drvdata missing\n", __func__); |
| 1226 | return -EINVAL; |
| 1227 | } |
| 1228 | |
| 1229 | platform_set_drvdata(pdev, NULL); |
| 1230 | |
| 1231 | return 0; |
| 1232 | } |
| 1233 | |
| 1234 | /* |
| 1235 | * This probe is called for child rpm-regulator devices which have |
| 1236 | * properties which are required to configure individual regulator |
| 1237 | * framework regulators for a given RPM regulator resource. |
| 1238 | */ |
| 1239 | static int __devinit rpm_vreg_device_probe(struct platform_device *pdev) |
| 1240 | { |
| 1241 | struct device *dev = &pdev->dev; |
| 1242 | struct device_node *node = dev->of_node; |
| 1243 | struct regulator_init_data *init_data; |
| 1244 | struct rpm_vreg *rpm_vreg; |
| 1245 | struct rpm_regulator *reg; |
| 1246 | int rc = 0; |
| 1247 | int i, regulator_type; |
| 1248 | u32 val; |
| 1249 | |
| 1250 | if (!dev->of_node) { |
| 1251 | dev_err(dev, "%s: device tree information missing\n", __func__); |
| 1252 | return -ENODEV; |
| 1253 | } |
| 1254 | |
| 1255 | if (pdev->dev.parent == NULL) { |
| 1256 | dev_err(dev, "%s: parent device missing\n", __func__); |
| 1257 | return -ENODEV; |
| 1258 | } |
| 1259 | |
| 1260 | rpm_vreg = dev_get_drvdata(pdev->dev.parent); |
| 1261 | if (rpm_vreg == NULL) { |
| 1262 | dev_err(dev, "%s: rpm_vreg not found in parent device\n", |
| 1263 | __func__); |
| 1264 | return -ENODEV; |
| 1265 | } |
| 1266 | |
| 1267 | reg = kzalloc(sizeof(struct rpm_regulator), GFP_KERNEL); |
| 1268 | if (reg == NULL) { |
| 1269 | dev_err(dev, "%s: could not allocate memory for reg\n", |
| 1270 | __func__); |
| 1271 | return -ENOMEM; |
| 1272 | } |
| 1273 | |
| 1274 | regulator_type = rpm_vreg->regulator_type; |
| 1275 | reg->rpm_vreg = rpm_vreg; |
| 1276 | reg->rdesc.ops = vreg_ops[regulator_type]; |
| 1277 | reg->rdesc.owner = THIS_MODULE; |
| 1278 | reg->rdesc.type = REGULATOR_VOLTAGE; |
| 1279 | |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 1280 | /* |
| 1281 | * Switch to voltage corner regulator ops if qcom,use-voltage-corner |
David Collins | 23c96cd | 2012-10-05 17:12:00 -0700 | [diff] [blame] | 1282 | * is specified in the device node (SMPS and LDO only). |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 1283 | */ |
David Collins | 23c96cd | 2012-10-05 17:12:00 -0700 | [diff] [blame] | 1284 | if (of_property_read_bool(node, "qcom,use-voltage-corner")) { |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 1285 | if (of_property_read_bool(node, |
| 1286 | "qcom,use-voltage-floor-corner")) { |
| 1287 | dev_err(dev, "%s: invalid properties: both qcom,use-voltage-corner and qcom,use-voltage-floor-corner specified\n", |
| 1288 | __func__); |
| 1289 | goto fail_free_reg; |
| 1290 | } |
| 1291 | |
David Collins | 23c96cd | 2012-10-05 17:12:00 -0700 | [diff] [blame] | 1292 | if (regulator_type == RPM_REGULATOR_SMD_TYPE_SMPS) |
| 1293 | reg->rdesc.ops = &smps_corner_ops; |
| 1294 | else if (regulator_type == RPM_REGULATOR_SMD_TYPE_LDO) |
| 1295 | reg->rdesc.ops = &ldo_corner_ops; |
David Collins | 9deea5b | 2013-03-05 10:16:01 -0800 | [diff] [blame] | 1296 | } else if (of_property_read_bool(node, |
| 1297 | "qcom,use-voltage-floor-corner")) { |
| 1298 | if (regulator_type == RPM_REGULATOR_SMD_TYPE_SMPS) |
| 1299 | reg->rdesc.ops = &smps_floor_corner_ops; |
| 1300 | else if (regulator_type == RPM_REGULATOR_SMD_TYPE_LDO) |
| 1301 | reg->rdesc.ops = &ldo_floor_corner_ops; |
David Collins | 23c96cd | 2012-10-05 17:12:00 -0700 | [diff] [blame] | 1302 | } |
David Collins | 4208ce3 | 2012-06-15 13:33:13 -0700 | [diff] [blame] | 1303 | |
David Collins | 409a9fa | 2013-03-05 10:54:25 -0800 | [diff] [blame] | 1304 | reg->always_send_voltage |
| 1305 | = of_property_read_bool(node, "qcom,always-send-voltage"); |
| 1306 | reg->always_send_current |
| 1307 | = of_property_read_bool(node, "qcom,always-send-current"); |
| 1308 | |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1309 | if (regulator_type == RPM_REGULATOR_SMD_TYPE_VS) |
| 1310 | reg->rdesc.n_voltages = 0; |
| 1311 | else |
| 1312 | reg->rdesc.n_voltages = 2; |
| 1313 | |
| 1314 | rc = of_property_read_u32(node, "qcom,set", &val); |
| 1315 | if (rc) { |
| 1316 | dev_err(dev, "%s: sleep set and/or active set must be " |
| 1317 | "configured via qcom,set property, rc=%d\n", __func__, |
| 1318 | rc); |
| 1319 | goto fail_free_reg; |
| 1320 | } else if (!(val & RPM_SET_CONFIG_BOTH)) { |
| 1321 | dev_err(dev, "%s: qcom,set=%u property is invalid\n", __func__, |
| 1322 | val); |
| 1323 | rc = -EINVAL; |
| 1324 | goto fail_free_reg; |
| 1325 | } |
| 1326 | |
| 1327 | reg->set_active = !!(val & RPM_SET_CONFIG_ACTIVE); |
| 1328 | reg->set_sleep = !!(val & RPM_SET_CONFIG_SLEEP); |
| 1329 | |
David Collins | 4853ae4 | 2012-06-12 09:37:19 -0700 | [diff] [blame] | 1330 | init_data = of_get_regulator_init_data(dev, node); |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1331 | if (init_data == NULL) { |
| 1332 | dev_err(dev, "%s: unable to allocate memory\n", __func__); |
| 1333 | rc = -ENOMEM; |
| 1334 | goto fail_free_reg; |
| 1335 | } |
| 1336 | if (init_data->constraints.name == NULL) { |
| 1337 | dev_err(dev, "%s: regulator name not specified\n", __func__); |
| 1338 | rc = -EINVAL; |
| 1339 | goto fail_free_reg; |
| 1340 | } |
| 1341 | |
| 1342 | init_data->constraints.input_uV = init_data->constraints.max_uV; |
| 1343 | |
| 1344 | if (of_get_property(node, "parent-supply", NULL)) |
| 1345 | init_data->supply_regulator = "parent"; |
| 1346 | |
| 1347 | /* |
| 1348 | * Fill in ops and mode masks based on callbacks specified for |
| 1349 | * this type of regulator. |
| 1350 | */ |
| 1351 | if (reg->rdesc.ops->enable) |
| 1352 | init_data->constraints.valid_ops_mask |
| 1353 | |= REGULATOR_CHANGE_STATUS; |
| 1354 | if (reg->rdesc.ops->get_voltage) |
| 1355 | init_data->constraints.valid_ops_mask |
| 1356 | |= REGULATOR_CHANGE_VOLTAGE; |
| 1357 | if (reg->rdesc.ops->get_mode) { |
| 1358 | init_data->constraints.valid_ops_mask |
| 1359 | |= REGULATOR_CHANGE_MODE | REGULATOR_CHANGE_DRMS; |
| 1360 | init_data->constraints.valid_modes_mask |
| 1361 | |= REGULATOR_MODE_NORMAL | REGULATOR_MODE_IDLE; |
| 1362 | } |
| 1363 | |
| 1364 | reg->rdesc.name = init_data->constraints.name; |
| 1365 | reg->min_uV = init_data->constraints.min_uV; |
| 1366 | reg->max_uV = init_data->constraints.max_uV; |
| 1367 | |
| 1368 | /* Initialize the param array based on optional properties. */ |
| 1369 | for (i = 0; i < RPM_REGULATOR_PARAM_MAX; i++) { |
| 1370 | rc = of_property_read_u32(node, params[i].property_name, &val); |
| 1371 | if (rc == 0) { |
| 1372 | if (params[i].supported_regulator_types |
| 1373 | & BIT(regulator_type)) { |
| 1374 | if (val < params[i].min |
| 1375 | || val > params[i].max) { |
| 1376 | pr_warn("%s: device tree property: " |
| 1377 | "%s=%u is outsided allowed " |
| 1378 | "range [%u, %u]\n", |
| 1379 | reg->rdesc.name, |
| 1380 | params[i].property_name, val, |
| 1381 | params[i].min, params[i].max); |
| 1382 | continue; |
| 1383 | } |
| 1384 | reg->req.param[i] = val; |
| 1385 | reg->req.modified |= BIT(i); |
| 1386 | } else { |
| 1387 | pr_warn("%s: regulator type=%d does not support" |
| 1388 | " device tree property: %s\n", |
| 1389 | reg->rdesc.name, regulator_type, |
| 1390 | params[i].property_name); |
| 1391 | } |
| 1392 | } |
| 1393 | } |
| 1394 | |
David Collins | a3e70de | 2012-10-05 14:38:13 -0700 | [diff] [blame] | 1395 | of_property_read_u32(node, "qcom,system-load", ®->system_load); |
David Collins | c764232 | 2012-04-04 10:19:12 -0700 | [diff] [blame] | 1396 | |
| 1397 | rpm_vreg_lock(rpm_vreg); |
| 1398 | list_add(®->list, &rpm_vreg->reg_list); |
| 1399 | rpm_vreg_unlock(rpm_vreg); |
| 1400 | |
| 1401 | reg->rdev = regulator_register(®->rdesc, dev, init_data, reg, node); |
| 1402 | if (IS_ERR(reg->rdev)) { |
| 1403 | rc = PTR_ERR(reg->rdev); |
| 1404 | reg->rdev = NULL; |
| 1405 | pr_err("regulator_register failed: %s, rc=%d\n", |
| 1406 | reg->rdesc.name, rc); |
| 1407 | goto fail_remove_from_list; |
| 1408 | } |
| 1409 | |
| 1410 | platform_set_drvdata(pdev, reg); |
| 1411 | |
| 1412 | pr_debug("successfully probed: %s\n", reg->rdesc.name); |
| 1413 | |
| 1414 | return 0; |
| 1415 | |
| 1416 | fail_remove_from_list: |
| 1417 | rpm_vreg_lock(rpm_vreg); |
| 1418 | list_del(®->list); |
| 1419 | rpm_vreg_unlock(rpm_vreg); |
| 1420 | |
| 1421 | fail_free_reg: |
| 1422 | kfree(reg); |
| 1423 | return rc; |
| 1424 | } |
| 1425 | |
| 1426 | /* |
| 1427 | * This probe is called for parent rpm-regulator devices which have |
| 1428 | * properties which are required to identify a given RPM resource. |
| 1429 | */ |
| 1430 | static int __devinit rpm_vreg_resource_probe(struct platform_device *pdev) |
| 1431 | { |
| 1432 | struct device *dev = &pdev->dev; |
| 1433 | struct device_node *node = dev->of_node; |
| 1434 | struct rpm_vreg *rpm_vreg; |
| 1435 | int val = 0; |
| 1436 | u32 resource_type; |
| 1437 | int rc; |
| 1438 | |
| 1439 | if (!dev->of_node) { |
| 1440 | dev_err(dev, "%s: device tree information missing\n", __func__); |
| 1441 | return -ENODEV; |
| 1442 | } |
| 1443 | |
| 1444 | /* Create new rpm_vreg entry. */ |
| 1445 | rpm_vreg = kzalloc(sizeof(struct rpm_vreg), GFP_KERNEL); |
| 1446 | if (rpm_vreg == NULL) { |
| 1447 | dev_err(dev, "%s: could not allocate memory for vreg\n", |
| 1448 | __func__); |
| 1449 | return -ENOMEM; |
| 1450 | } |
| 1451 | |
| 1452 | /* Required device tree properties: */ |
| 1453 | rc = of_property_read_string(node, "qcom,resource-name", |
| 1454 | &rpm_vreg->resource_name); |
| 1455 | if (rc) { |
| 1456 | dev_err(dev, "%s: qcom,resource-name missing in DT node\n", |
| 1457 | __func__); |
| 1458 | goto fail_free_vreg; |
| 1459 | } |
| 1460 | resource_type = rpm_vreg_string_to_int(rpm_vreg->resource_name); |
| 1461 | |
| 1462 | rc = of_property_read_u32(node, "qcom,resource-id", |
| 1463 | &rpm_vreg->resource_id); |
| 1464 | if (rc) { |
| 1465 | dev_err(dev, "%s: qcom,resource-id missing in DT node\n", |
| 1466 | __func__); |
| 1467 | goto fail_free_vreg; |
| 1468 | } |
| 1469 | |
| 1470 | rc = of_property_read_u32(node, "qcom,regulator-type", |
| 1471 | &rpm_vreg->regulator_type); |
| 1472 | if (rc) { |
| 1473 | dev_err(dev, "%s: qcom,regulator-type missing in DT node\n", |
| 1474 | __func__); |
| 1475 | goto fail_free_vreg; |
| 1476 | } |
| 1477 | |
| 1478 | if ((rpm_vreg->regulator_type < 0) |
| 1479 | || (rpm_vreg->regulator_type >= RPM_REGULATOR_SMD_TYPE_MAX)) { |
| 1480 | dev_err(dev, "%s: invalid regulator type: %d\n", __func__, |
| 1481 | rpm_vreg->regulator_type); |
| 1482 | rc = -EINVAL; |
| 1483 | goto fail_free_vreg; |
| 1484 | } |
| 1485 | |
| 1486 | /* Optional device tree properties: */ |
| 1487 | of_property_read_u32(node, "qcom,allow-atomic", &val); |
| 1488 | rpm_vreg->allow_atomic = !!val; |
| 1489 | of_property_read_u32(node, "qcom,enable-time", &rpm_vreg->enable_time); |
| 1490 | of_property_read_u32(node, "qcom,hpm-min-load", |
| 1491 | &rpm_vreg->hpm_min_load); |
| 1492 | |
| 1493 | rpm_vreg->handle_active = msm_rpm_create_request(RPM_SET_ACTIVE, |
| 1494 | resource_type, rpm_vreg->resource_id, RPM_REGULATOR_PARAM_MAX); |
| 1495 | if (rpm_vreg->handle_active == NULL |
| 1496 | || IS_ERR(rpm_vreg->handle_active)) { |
| 1497 | rc = PTR_ERR(rpm_vreg->handle_active); |
| 1498 | dev_err(dev, "%s: failed to create active RPM handle, rc=%d\n", |
| 1499 | __func__, rc); |
| 1500 | goto fail_free_vreg; |
| 1501 | } |
| 1502 | |
| 1503 | rpm_vreg->handle_sleep = msm_rpm_create_request(RPM_SET_SLEEP, |
| 1504 | resource_type, rpm_vreg->resource_id, RPM_REGULATOR_PARAM_MAX); |
| 1505 | if (rpm_vreg->handle_sleep == NULL || IS_ERR(rpm_vreg->handle_sleep)) { |
| 1506 | rc = PTR_ERR(rpm_vreg->handle_sleep); |
| 1507 | dev_err(dev, "%s: failed to create sleep RPM handle, rc=%d\n", |
| 1508 | __func__, rc); |
| 1509 | goto fail_free_handle_active; |
| 1510 | } |
| 1511 | |
| 1512 | INIT_LIST_HEAD(&rpm_vreg->reg_list); |
| 1513 | |
| 1514 | if (rpm_vreg->allow_atomic) |
| 1515 | spin_lock_init(&rpm_vreg->slock); |
| 1516 | else |
| 1517 | mutex_init(&rpm_vreg->mlock); |
| 1518 | |
| 1519 | platform_set_drvdata(pdev, rpm_vreg); |
| 1520 | |
| 1521 | rc = of_platform_populate(node, NULL, NULL, dev); |
| 1522 | if (rc) { |
| 1523 | dev_err(dev, "%s: failed to add child nodes, rc=%d\n", __func__, |
| 1524 | rc); |
| 1525 | goto fail_unset_drvdata; |
| 1526 | } |
| 1527 | |
| 1528 | pr_debug("successfully probed: %s (%08X) %u\n", rpm_vreg->resource_name, |
| 1529 | resource_type, rpm_vreg->resource_id); |
| 1530 | |
| 1531 | return rc; |
| 1532 | |
| 1533 | fail_unset_drvdata: |
| 1534 | platform_set_drvdata(pdev, NULL); |
| 1535 | msm_rpm_free_request(rpm_vreg->handle_sleep); |
| 1536 | |
| 1537 | fail_free_handle_active: |
| 1538 | msm_rpm_free_request(rpm_vreg->handle_active); |
| 1539 | |
| 1540 | fail_free_vreg: |
| 1541 | kfree(rpm_vreg); |
| 1542 | |
| 1543 | return rc; |
| 1544 | } |
| 1545 | |
| 1546 | static struct of_device_id rpm_vreg_match_table_device[] = { |
| 1547 | { .compatible = "qcom,rpm-regulator-smd", }, |
| 1548 | {} |
| 1549 | }; |
| 1550 | |
| 1551 | static struct of_device_id rpm_vreg_match_table_resource[] = { |
| 1552 | { .compatible = "qcom,rpm-regulator-smd-resource", }, |
| 1553 | {} |
| 1554 | }; |
| 1555 | |
| 1556 | static struct platform_driver rpm_vreg_device_driver = { |
| 1557 | .probe = rpm_vreg_device_probe, |
| 1558 | .remove = __devexit_p(rpm_vreg_device_remove), |
| 1559 | .driver = { |
| 1560 | .name = "qcom,rpm-regulator-smd", |
| 1561 | .owner = THIS_MODULE, |
| 1562 | .of_match_table = rpm_vreg_match_table_device, |
| 1563 | }, |
| 1564 | }; |
| 1565 | |
| 1566 | static struct platform_driver rpm_vreg_resource_driver = { |
| 1567 | .probe = rpm_vreg_resource_probe, |
| 1568 | .remove = __devexit_p(rpm_vreg_resource_remove), |
| 1569 | .driver = { |
| 1570 | .name = "qcom,rpm-regulator-smd-resource", |
| 1571 | .owner = THIS_MODULE, |
| 1572 | .of_match_table = rpm_vreg_match_table_resource, |
| 1573 | }, |
| 1574 | }; |
| 1575 | |
| 1576 | /** |
| 1577 | * rpm_regulator_smd_driver_init() - initialized SMD RPM regulator driver |
| 1578 | * |
| 1579 | * This function registers the SMD RPM regulator platform drivers. |
| 1580 | * |
| 1581 | * Returns 0 on success or errno on failure. |
| 1582 | */ |
| 1583 | int __init rpm_regulator_smd_driver_init(void) |
| 1584 | { |
| 1585 | static bool initialized; |
| 1586 | int i, rc; |
| 1587 | |
| 1588 | if (initialized) |
| 1589 | return 0; |
| 1590 | else |
| 1591 | initialized = true; |
| 1592 | |
| 1593 | /* Store parameter string names as integers */ |
| 1594 | for (i = 0; i < RPM_REGULATOR_PARAM_MAX; i++) |
| 1595 | params[i].key = rpm_vreg_string_to_int(params[i].name); |
| 1596 | |
| 1597 | rc = platform_driver_register(&rpm_vreg_device_driver); |
| 1598 | if (rc) |
| 1599 | return rc; |
| 1600 | |
| 1601 | return platform_driver_register(&rpm_vreg_resource_driver); |
| 1602 | } |
| 1603 | EXPORT_SYMBOL_GPL(rpm_regulator_smd_driver_init); |
| 1604 | |
| 1605 | static void __exit rpm_vreg_exit(void) |
| 1606 | { |
| 1607 | platform_driver_unregister(&rpm_vreg_device_driver); |
| 1608 | platform_driver_unregister(&rpm_vreg_resource_driver); |
| 1609 | } |
| 1610 | |
| 1611 | module_init(rpm_regulator_smd_driver_init); |
| 1612 | module_exit(rpm_vreg_exit); |
| 1613 | |
| 1614 | MODULE_LICENSE("GPL v2"); |
| 1615 | MODULE_DESCRIPTION("MSM SMD RPM regulator driver"); |