drivers/clk/qcom/clk-rpmh.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/clk-provider.h>
   7 #include <linux/err.h>
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/of.h>
  11 #include <linux/of_device.h>
  12 #include <linux/platform_device.h>
  13 #include <soc/qcom/cmd-db.h>
  14 #include <soc/qcom/rpmh.h>
  15 #include <soc/qcom/tcs.h>
  16
  17 #include <dt-bindings/clock/qcom,rpmh.h>
  18
  19 #define CLK_RPMH_ARC_EN_OFFSET          0
  20 #define CLK_RPMH_VRM_EN_OFFSET          4
  21
  22 /**
  23  * struct bcm_db - Auxiliary data pertaining to each Bus Clock Manager(BCM)
  24  * @unit: divisor used to convert Hz value to an RPMh msg
  25  * @width: multiplier used to convert Hz value to an RPMh msg
  26  * @vcd: virtual clock domain that this bcm belongs to
  27  * @reserved: reserved to pad the struct
  28  */
  29 struct bcm_db {
  30         __le32 unit;
  31         __le16 width;
  32         u8 vcd;
  33         u8 reserved;
  34 };
  35
  36 /**
  37  * struct clk_rpmh - individual rpmh clock data structure
  38  * @hw:                 handle between common and hardware-specific interfaces
  39  * @res_name:           resource name for the rpmh clock
  40  * @div:                clock divider to compute the clock rate
  41  * @res_addr:           base address of the rpmh resource within the RPMh
  42  * @res_on_val:         rpmh clock enable value
  43  * @state:              rpmh clock requested state
  44  * @aggr_state:         rpmh clock aggregated state
  45  * @last_sent_aggr_state: rpmh clock last aggr state sent to RPMh
  46  * @valid_state_mask:   mask to determine the state of the rpmh clock
  47  * @unit:               divisor to convert rate to rpmh msg in magnitudes of Khz
  48  * @dev:                device to which it is attached
  49  * @peer:               pointer to the clock rpmh sibling
  50  */
  51 struct clk_rpmh {
  52         struct clk_hw hw;
  53         const char *res_name;
  54         u8 div;
  55         u32 res_addr;
  56         u32 res_on_val;
  57         u32 state;
  58         u32 aggr_state;
  59         u32 last_sent_aggr_state;
  60         u32 valid_state_mask;
  61         u32 unit;
  62         struct device *dev;
  63         struct clk_rpmh *peer;
  64 };
  65
  66 struct clk_rpmh_desc {
  67         struct clk_hw **clks;
  68         size_t num_clks;
  69 };
  70
  71 static DEFINE_MUTEX(rpmh_clk_lock);
  72
  73 #define __DEFINE_CLK_RPMH(_platform, _name, _name_active, _res_name,    \
  74                           _res_en_offset, _res_on, _div)                \
  75         static struct clk_rpmh _platform##_##_name_active;              \
  76         static struct clk_rpmh _platform##_##_name = {                  \
  77                 .res_name = _res_name,                                  \
  78                 .res_addr = _res_en_offset,                             \
  79                 .res_on_val = _res_on,                                  \
  80                 .div = _div,                                            \
  81                 .peer = &_platform##_##_name_active,                    \
  82                 .valid_state_mask = (BIT(RPMH_WAKE_ONLY_STATE) |        \
  83                                       BIT(RPMH_ACTIVE_ONLY_STATE) |     \
  84                                       BIT(RPMH_SLEEP_STATE)),           \
  85                 .hw.init = &(struct clk_init_data){                     \
  86                         .ops = &clk_rpmh_ops,                           \
  87                         .name = #_name,                                 \
  88                         .parent_data =  &(const struct clk_parent_data){ \
  89                                         .fw_name = "xo",                \
  90                                         .name = "xo_board",             \
  91                         },                                              \
  92                         .num_parents = 1,                               \
  93                 },                                                      \
  94         };                                                              \
  95         static struct clk_rpmh _platform##_##_name_active = {           \
  96                 .res_name = _res_name,                                  \
  97                 .res_addr = _res_en_offset,                             \
  98                 .res_on_val = _res_on,                                  \
  99                 .div = _div,                                            \
 100                 .peer = &_platform##_##_name,                           \
 101                 .valid_state_mask = (BIT(RPMH_WAKE_ONLY_STATE) |        \
 102                                         BIT(RPMH_ACTIVE_ONLY_STATE)),   \
 103                 .hw.init = &(struct clk_init_data){                     \
 104                         .ops = &clk_rpmh_ops,                           \
 105                         .name = #_name_active,                          \
 106                         .parent_data =  &(const struct clk_parent_data){ \
 107                                         .fw_name = "xo",                \
 108                                         .name = "xo_board",             \
 109                         },                                              \
 110                         .num_parents = 1,                               \
 111                 },                                                      \
 112         }
 113
 114 #define DEFINE_CLK_RPMH_ARC(_platform, _name, _name_active, _res_name,  \
 115                             _res_on, _div)                              \
 116         __DEFINE_CLK_RPMH(_platform, _name, _name_active, _res_name,    \
 117                           CLK_RPMH_ARC_EN_OFFSET, _res_on, _div)
 118
 119 #define DEFINE_CLK_RPMH_VRM(_platform, _name, _name_active, _res_name,  \
 120                                 _div)                                   \
 121         __DEFINE_CLK_RPMH(_platform, _name, _name_active, _res_name,    \
 122                           CLK_RPMH_VRM_EN_OFFSET, 1, _div)
 123
 124 #define DEFINE_CLK_RPMH_BCM(_platform, _name, _res_name)                \
 125         static struct clk_rpmh _platform##_##_name = {                  \
 126                 .res_name = _res_name,                                  \
 127                 .valid_state_mask = BIT(RPMH_ACTIVE_ONLY_STATE),        \
 128                 .div = 1,                                               \
 129                 .hw.init = &(struct clk_init_data){                     \
 130                         .ops = &clk_rpmh_bcm_ops,                       \
 131                         .name = #_name,                                 \
 132                 },                                                      \
 133         }
 134
 135 static inline struct clk_rpmh *to_clk_rpmh(struct clk_hw *_hw)
 136 {
 137         return container_of(_hw, struct clk_rpmh, hw);
 138 }
 139
 140 static inline bool has_state_changed(struct clk_rpmh *c, u32 state)
 141 {
 142         return (c->last_sent_aggr_state & BIT(state))
 143                 != (c->aggr_state & BIT(state));
 144 }
 145
 146 static int clk_rpmh_send(struct clk_rpmh *c, enum rpmh_state state,
 147                          struct tcs_cmd *cmd, bool wait)
 148 {
 149         if (wait)
 150                 return rpmh_write(c->dev, state, cmd, 1);
 151
 152         return rpmh_write_async(c->dev, state, cmd, 1);
 153 }
 154
 155 static int clk_rpmh_send_aggregate_command(struct clk_rpmh *c)
 156 {
 157         struct tcs_cmd cmd = { 0 };
 158         u32 cmd_state, on_val;
 159         enum rpmh_state state = RPMH_SLEEP_STATE;
 160         int ret;
 161         bool wait;
 162
 163         cmd.addr = c->res_addr;
 164         cmd_state = c->aggr_state;
 165         on_val = c->res_on_val;
 166
 167         for (; state <= RPMH_ACTIVE_ONLY_STATE; state++) {
 168                 if (has_state_changed(c, state)) {
 169                         if (cmd_state & BIT(state))
 170                                 cmd.data = on_val;
 171
 172                         wait = cmd_state && state == RPMH_ACTIVE_ONLY_STATE;
 173                         ret = clk_rpmh_send(c, state, &cmd, wait);
 174                         if (ret) {
 175                                 dev_err(c->dev, "set %s state of %s failed: (%d)\n",
 176                                         !state ? "sleep" :
 177                                         state == RPMH_WAKE_ONLY_STATE   ?
 178                                         "wake" : "active", c->res_name, ret);
 179                                 return ret;
 180                         }
 181                 }
 182         }
 183
 184         c->last_sent_aggr_state = c->aggr_state;
 185         c->peer->last_sent_aggr_state =  c->last_sent_aggr_state;
 186
 187         return 0;
 188 }
 189
 190 /*
 191  * Update state and aggregate state values based on enable value.
 192  */
 193 static int clk_rpmh_aggregate_state_send_command(struct clk_rpmh *c,
 194                                                 bool enable)
 195 {
 196         int ret;
 197
 198         /* Nothing required to be done if already off or on */
 199         if (enable == c->state)
 200                 return 0;
 201
 202         c->state = enable ? c->valid_state_mask : 0;
 203         c->aggr_state = c->state | c->peer->state;
 204         c->peer->aggr_state = c->aggr_state;
 205
 206         ret = clk_rpmh_send_aggregate_command(c);
 207         if (!ret)
 208                 return 0;
 209
 210         if (ret && enable)
 211                 c->state = 0;
 212         else if (ret)
 213                 c->state = c->valid_state_mask;
 214
 215         WARN(1, "clk: %s failed to %s\n", c->res_name,
 216              enable ? "enable" : "disable");
 217         return ret;
 218 }
 219
 220 static int clk_rpmh_prepare(struct clk_hw *hw)
 221 {
 222         struct clk_rpmh *c = to_clk_rpmh(hw);
 223         int ret = 0;
 224
 225         mutex_lock(&rpmh_clk_lock);
 226         ret = clk_rpmh_aggregate_state_send_command(c, true);
 227         mutex_unlock(&rpmh_clk_lock);
 228
 229         return ret;
 230 }
 231
 232 static void clk_rpmh_unprepare(struct clk_hw *hw)
 233 {
 234         struct clk_rpmh *c = to_clk_rpmh(hw);
 235
 236         mutex_lock(&rpmh_clk_lock);
 237         clk_rpmh_aggregate_state_send_command(c, false);
 238         mutex_unlock(&rpmh_clk_lock);
 239 };
 240
 241 static unsigned long clk_rpmh_recalc_rate(struct clk_hw *hw,
 242                                         unsigned long prate)
 243 {
 244         struct clk_rpmh *r = to_clk_rpmh(hw);
 245
 246         /*
 247          * RPMh clocks have a fixed rate. Return static rate.
 248          */
 249         return prate / r->div;
 250 }
 251
 252 static const struct clk_ops clk_rpmh_ops = {
 253         .prepare        = clk_rpmh_prepare,
 254         .unprepare      = clk_rpmh_unprepare,
 255         .recalc_rate    = clk_rpmh_recalc_rate,
 256 };
 257
 258 static int clk_rpmh_bcm_send_cmd(struct clk_rpmh *c, bool enable)
 259 {
 260         struct tcs_cmd cmd = { 0 };
 261         u32 cmd_state;
 262         int ret = 0;
 263
 264         mutex_lock(&rpmh_clk_lock);
 265         if (enable) {
 266                 cmd_state = 1;
 267                 if (c->aggr_state)
 268                         cmd_state = c->aggr_state;
 269         } else {
 270                 cmd_state = 0;
 271         }
 272
 273         if (c->last_sent_aggr_state != cmd_state) {
 274                 cmd.addr = c->res_addr;
 275                 cmd.data = BCM_TCS_CMD(1, enable, 0, cmd_state);
 276
 277                 ret = clk_rpmh_send(c, RPMH_ACTIVE_ONLY_STATE, &cmd, enable);
 278                 if (ret) {
 279                         dev_err(c->dev, "set active state of %s failed: (%d)\n",
 280                                 c->res_name, ret);
 281                 } else {
 282                         c->last_sent_aggr_state = cmd_state;
 283                 }
 284         }
 285
 286         mutex_unlock(&rpmh_clk_lock);
 287
 288         return ret;
 289 }
 290
 291 static int clk_rpmh_bcm_prepare(struct clk_hw *hw)
 292 {
 293         struct clk_rpmh *c = to_clk_rpmh(hw);
 294
 295         return clk_rpmh_bcm_send_cmd(c, true);
 296 }
 297
 298 static void clk_rpmh_bcm_unprepare(struct clk_hw *hw)
 299 {
 300         struct clk_rpmh *c = to_clk_rpmh(hw);
 301
 302         clk_rpmh_bcm_send_cmd(c, false);
 303 }
 304
 305 static int clk_rpmh_bcm_set_rate(struct clk_hw *hw, unsigned long rate,
 306                                  unsigned long parent_rate)
 307 {
 308         struct clk_rpmh *c = to_clk_rpmh(hw);
 309
 310         c->aggr_state = rate / c->unit;
 311         /*
 312          * Since any non-zero value sent to hw would result in enabling the
 313          * clock, only send the value if the clock has already been prepared.
 314          */
 315         if (clk_hw_is_prepared(hw))
 316                 clk_rpmh_bcm_send_cmd(c, true);
 317
 318         return 0;
 319 }
 320
 321 static long clk_rpmh_round_rate(struct clk_hw *hw, unsigned long rate,
 322                                 unsigned long *parent_rate)
 323 {
 324         return rate;
 325 }
 326
 327 static unsigned long clk_rpmh_bcm_recalc_rate(struct clk_hw *hw,
 328                                         unsigned long prate)
 329 {
 330         struct clk_rpmh *c = to_clk_rpmh(hw);
 331
 332         return c->aggr_state * c->unit;
 333 }
 334
 335 static const struct clk_ops clk_rpmh_bcm_ops = {
 336         .prepare        = clk_rpmh_bcm_prepare,
 337         .unprepare      = clk_rpmh_bcm_unprepare,
 338         .set_rate       = clk_rpmh_bcm_set_rate,
 339         .round_rate     = clk_rpmh_round_rate,
 340         .recalc_rate    = clk_rpmh_bcm_recalc_rate,
 341 };
 342
 343 /* Resource name must match resource id present in cmd-db */
 344 DEFINE_CLK_RPMH_ARC(sdm845, bi_tcxo, bi_tcxo_ao, "xo.lvl", 0x3, 2);
 345 DEFINE_CLK_RPMH_VRM(sdm845, ln_bb_clk2, ln_bb_clk2_ao, "lnbclka2", 2);
 346 DEFINE_CLK_RPMH_VRM(sdm845, ln_bb_clk3, ln_bb_clk3_ao, "lnbclka3", 2);
 347 DEFINE_CLK_RPMH_VRM(sdm845, rf_clk1, rf_clk1_ao, "rfclka1", 1);
 348 DEFINE_CLK_RPMH_VRM(sdm845, rf_clk2, rf_clk2_ao, "rfclka2", 1);
 349 DEFINE_CLK_RPMH_VRM(sdm845, rf_clk3, rf_clk3_ao, "rfclka3", 1);
 350 DEFINE_CLK_RPMH_VRM(sm8150, rf_clk3, rf_clk3_ao, "rfclka3", 1);
 351 DEFINE_CLK_RPMH_BCM(sdm845, ipa, "IP0");
 352
 353 static struct clk_hw *sdm845_rpmh_clocks[] = {
 354         [RPMH_CXO_CLK]          = &sdm845_bi_tcxo.hw,
 355         [RPMH_CXO_CLK_A]        = &sdm845_bi_tcxo_ao.hw,
 356         [RPMH_LN_BB_CLK2]       = &sdm845_ln_bb_clk2.hw,
 357         [RPMH_LN_BB_CLK2_A]     = &sdm845_ln_bb_clk2_ao.hw,
 358         [RPMH_LN_BB_CLK3]       = &sdm845_ln_bb_clk3.hw,
 359         [RPMH_LN_BB_CLK3_A]     = &sdm845_ln_bb_clk3_ao.hw,
 360         [RPMH_RF_CLK1]          = &sdm845_rf_clk1.hw,
 361         [RPMH_RF_CLK1_A]        = &sdm845_rf_clk1_ao.hw,
 362         [RPMH_RF_CLK2]          = &sdm845_rf_clk2.hw,
 363         [RPMH_RF_CLK2_A]        = &sdm845_rf_clk2_ao.hw,
 364         [RPMH_RF_CLK3]          = &sdm845_rf_clk3.hw,
 365         [RPMH_RF_CLK3_A]        = &sdm845_rf_clk3_ao.hw,
 366         [RPMH_IPA_CLK]          = &sdm845_ipa.hw,
 367 };
 368
 369 static const struct clk_rpmh_desc clk_rpmh_sdm845 = {
 370         .clks = sdm845_rpmh_clocks,
 371         .num_clks = ARRAY_SIZE(sdm845_rpmh_clocks),
 372 };
 373
 374 static struct clk_hw *sm8150_rpmh_clocks[] = {
 375         [RPMH_CXO_CLK]          = &sdm845_bi_tcxo.hw,
 376         [RPMH_CXO_CLK_A]        = &sdm845_bi_tcxo_ao.hw,
 377         [RPMH_LN_BB_CLK2]       = &sdm845_ln_bb_clk2.hw,
 378         [RPMH_LN_BB_CLK2_A]     = &sdm845_ln_bb_clk2_ao.hw,
 379         [RPMH_LN_BB_CLK3]       = &sdm845_ln_bb_clk3.hw,
 380         [RPMH_LN_BB_CLK3_A]     = &sdm845_ln_bb_clk3_ao.hw,
 381         [RPMH_RF_CLK1]          = &sdm845_rf_clk1.hw,
 382         [RPMH_RF_CLK1_A]        = &sdm845_rf_clk1_ao.hw,
 383         [RPMH_RF_CLK2]          = &sdm845_rf_clk2.hw,
 384         [RPMH_RF_CLK2_A]        = &sdm845_rf_clk2_ao.hw,
 385         [RPMH_RF_CLK3]          = &sdm845_rf_clk3.hw,
 386         [RPMH_RF_CLK3_A]        = &sdm845_rf_clk3_ao.hw,
 387 };
 388
 389 static const struct clk_rpmh_desc clk_rpmh_sm8150 = {
 390         .clks = sm8150_rpmh_clocks,
 391         .num_clks = ARRAY_SIZE(sm8150_rpmh_clocks),
 392 };
 393
 394 static struct clk_hw *sc7180_rpmh_clocks[] = {
 395         [RPMH_CXO_CLK]          = &sdm845_bi_tcxo.hw,
 396         [RPMH_CXO_CLK_A]        = &sdm845_bi_tcxo_ao.hw,
 397         [RPMH_LN_BB_CLK2]       = &sdm845_ln_bb_clk2.hw,
 398         [RPMH_LN_BB_CLK2_A]     = &sdm845_ln_bb_clk2_ao.hw,
 399         [RPMH_LN_BB_CLK3]       = &sdm845_ln_bb_clk3.hw,
 400         [RPMH_LN_BB_CLK3_A]     = &sdm845_ln_bb_clk3_ao.hw,
 401         [RPMH_RF_CLK1]          = &sdm845_rf_clk1.hw,
 402         [RPMH_RF_CLK1_A]        = &sdm845_rf_clk1_ao.hw,
 403         [RPMH_RF_CLK2]          = &sdm845_rf_clk2.hw,
 404         [RPMH_RF_CLK2_A]        = &sdm845_rf_clk2_ao.hw,
 405         [RPMH_IPA_CLK]          = &sdm845_ipa.hw,
 406 };
 407
 408 static const struct clk_rpmh_desc clk_rpmh_sc7180 = {
 409         .clks = sc7180_rpmh_clocks,
 410         .num_clks = ARRAY_SIZE(sc7180_rpmh_clocks),
 411 };
 412
 413 DEFINE_CLK_RPMH_VRM(sm8250, ln_bb_clk1, ln_bb_clk1_ao, "lnbclka1", 2);
 414
 415 static struct clk_hw *sm8250_rpmh_clocks[] = {
 416         [RPMH_CXO_CLK]          = &sdm845_bi_tcxo.hw,
 417         [RPMH_CXO_CLK_A]        = &sdm845_bi_tcxo_ao.hw,
 418         [RPMH_LN_BB_CLK1]       = &sm8250_ln_bb_clk1.hw,
 419         [RPMH_LN_BB_CLK1_A]     = &sm8250_ln_bb_clk1_ao.hw,
 420         [RPMH_LN_BB_CLK2]       = &sdm845_ln_bb_clk2.hw,
 421         [RPMH_LN_BB_CLK2_A]     = &sdm845_ln_bb_clk2_ao.hw,
 422         [RPMH_LN_BB_CLK3]       = &sdm845_ln_bb_clk3.hw,
 423         [RPMH_LN_BB_CLK3_A]     = &sdm845_ln_bb_clk3_ao.hw,
 424         [RPMH_RF_CLK1]          = &sdm845_rf_clk1.hw,
 425         [RPMH_RF_CLK1_A]        = &sdm845_rf_clk1_ao.hw,
 426         [RPMH_RF_CLK3]          = &sdm845_rf_clk3.hw,
 427         [RPMH_RF_CLK3_A]        = &sdm845_rf_clk3_ao.hw,
 428 };
 429
 430 static const struct clk_rpmh_desc clk_rpmh_sm8250 = {
 431         .clks = sm8250_rpmh_clocks,
 432         .num_clks = ARRAY_SIZE(sm8250_rpmh_clocks),
 433 };
 434
 435 static struct clk_hw *of_clk_rpmh_hw_get(struct of_phandle_args *clkspec,
 436                                          void *data)
 437 {
 438         struct clk_rpmh_desc *rpmh = data;
 439         unsigned int idx = clkspec->args[0];
 440
 441         if (idx >= rpmh->num_clks) {
 442                 pr_err("%s: invalid index %u\n", __func__, idx);
 443                 return ERR_PTR(-EINVAL);
 444         }
 445
 446         return rpmh->clks[idx];
 447 }
 448
 449 static int clk_rpmh_probe(struct platform_device *pdev)
 450 {
 451         struct clk_hw **hw_clks;
 452         struct clk_rpmh *rpmh_clk;
 453         const struct clk_rpmh_desc *desc;
 454         int ret, i;
 455
 456         desc = of_device_get_match_data(&pdev->dev);
 457         if (!desc)
 458                 return -ENODEV;
 459
 460         hw_clks = desc->clks;
 461
 462         for (i = 0; i < desc->num_clks; i++) {
 463                 const char *name;
 464                 u32 res_addr;
 465                 size_t aux_data_len;
 466                 const struct bcm_db *data;
 467
 468                 if (!hw_clks[i])
 469                         continue;
 470
 471                 name = hw_clks[i]->init->name;
 472
 473                 rpmh_clk = to_clk_rpmh(hw_clks[i]);
 474                 res_addr = cmd_db_read_addr(rpmh_clk->res_name);
 475                 if (!res_addr) {
 476                         dev_err(&pdev->dev, "missing RPMh resource address for %s\n",
 477                                 rpmh_clk->res_name);
 478                         return -ENODEV;
 479                 }
 480
 481                 data = cmd_db_read_aux_data(rpmh_clk->res_name, &aux_data_len);
 482                 if (IS_ERR(data)) {
 483                         ret = PTR_ERR(data);
 484                         dev_err(&pdev->dev,
 485                                 "error reading RPMh aux data for %s (%d)\n",
 486                                 rpmh_clk->res_name, ret);
 487                         return ret;
 488                 }
 489
 490                 /* Convert unit from Khz to Hz */
 491                 if (aux_data_len == sizeof(*data))
 492                         rpmh_clk->unit = le32_to_cpu(data->unit) * 1000ULL;
 493
 494                 rpmh_clk->res_addr += res_addr;
 495                 rpmh_clk->dev = &pdev->dev;
 496
 497                 ret = devm_clk_hw_register(&pdev->dev, hw_clks[i]);
 498                 if (ret) {
 499                         dev_err(&pdev->dev, "failed to register %s\n", name);
 500                         return ret;
 501                 }
 502         }
 503
 504         /* typecast to silence compiler warning */
 505         ret = devm_of_clk_add_hw_provider(&pdev->dev, of_clk_rpmh_hw_get,
 506                                           (void *)desc);
 507         if (ret) {
 508                 dev_err(&pdev->dev, "Failed to add clock provider\n");
 509                 return ret;
 510         }
 511
 512         dev_dbg(&pdev->dev, "Registered RPMh clocks\n");
 513
 514         return 0;
 515 }
 516
 517 static const struct of_device_id clk_rpmh_match_table[] = {
 518         { .compatible = "qcom,sc7180-rpmh-clk", .data = &clk_rpmh_sc7180},
 519         { .compatible = "qcom,sdm845-rpmh-clk", .data = &clk_rpmh_sdm845},
 520         { .compatible = "qcom,sm8150-rpmh-clk", .data = &clk_rpmh_sm8150},
 521         { .compatible = "qcom,sm8250-rpmh-clk", .data = &clk_rpmh_sm8250},
 522         { }
 523 };
 524 MODULE_DEVICE_TABLE(of, clk_rpmh_match_table);
 525
 526 static struct platform_driver clk_rpmh_driver = {
 527         .probe          = clk_rpmh_probe,
 528         .driver         = {
 529                 .name   = "clk-rpmh",
 530                 .of_match_table = clk_rpmh_match_table,
 531         },
 532 };
 533
 534 static int __init clk_rpmh_init(void)
 535 {
 536         return platform_driver_register(&clk_rpmh_driver);
 537 }
 538 core_initcall(clk_rpmh_init);
 539
 540 static void __exit clk_rpmh_exit(void)
 541 {
 542         platform_driver_unregister(&clk_rpmh_driver);
 543 }
 544 module_exit(clk_rpmh_exit);
 545
 546 MODULE_DESCRIPTION("QCOM RPMh Clock Driver");
 547 MODULE_LICENSE("GPL v2");