1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * IMG I2S input controller driver 4 * 5 * Copyright (C) 2015 Imagination Technologies Ltd. 6 * 7 * Author: Damien Horsley <Damien.Horsley@imgtec.com> 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/init.h> 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/of.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/reset.h> 18 19 #include <sound/core.h> 20 #include <sound/dmaengine_pcm.h> 21 #include <sound/initval.h> 22 #include <sound/pcm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/soc.h> 25 26 #define IMG_I2S_IN_RX_FIFO 0x0 27 28 #define IMG_I2S_IN_CTL 0x4 29 #define IMG_I2S_IN_CTL_ACTIVE_CHAN_MASK 0xfffffffc 30 #define IMG_I2S_IN_CTL_ACTIVE_CH_SHIFT 2 31 #define IMG_I2S_IN_CTL_16PACK_MASK BIT(1) 32 #define IMG_I2S_IN_CTL_ME_MASK BIT(0) 33 34 #define IMG_I2S_IN_CH_CTL 0x4 35 #define IMG_I2S_IN_CH_CTL_CCDEL_MASK 0x38000 36 #define IMG_I2S_IN_CH_CTL_CCDEL_SHIFT 15 37 #define IMG_I2S_IN_CH_CTL_FEN_MASK BIT(14) 38 #define IMG_I2S_IN_CH_CTL_FMODE_MASK BIT(13) 39 #define IMG_I2S_IN_CH_CTL_16PACK_MASK BIT(12) 40 #define IMG_I2S_IN_CH_CTL_JUST_MASK BIT(10) 41 #define IMG_I2S_IN_CH_CTL_PACKH_MASK BIT(9) 42 #define IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK BIT(8) 43 #define IMG_I2S_IN_CH_CTL_BLKP_MASK BIT(7) 44 #define IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK BIT(6) 45 #define IMG_I2S_IN_CH_CTL_LRD_MASK BIT(3) 46 #define IMG_I2S_IN_CH_CTL_FW_MASK BIT(2) 47 #define IMG_I2S_IN_CH_CTL_SW_MASK BIT(1) 48 #define IMG_I2S_IN_CH_CTL_ME_MASK BIT(0) 49 50 #define IMG_I2S_IN_CH_STRIDE 0x20 51 52 struct img_i2s_in { 53 void __iomem *base; 54 struct clk *clk_sys; 55 struct snd_dmaengine_dai_dma_data dma_data; 56 struct device *dev; 57 unsigned int max_i2s_chan; 58 void __iomem *channel_base; 59 unsigned int active_channels; 60 struct snd_soc_dai_driver dai_driver; 61 u32 suspend_ctl; 62 u32 *suspend_ch_ctl; 63 }; 64 65 static int img_i2s_in_runtime_suspend(struct device *dev) 66 { 67 struct img_i2s_in *i2s = dev_get_drvdata(dev); 68 69 clk_disable_unprepare(i2s->clk_sys); 70 71 return 0; 72 } 73 74 static int img_i2s_in_runtime_resume(struct device *dev) 75 { 76 struct img_i2s_in *i2s = dev_get_drvdata(dev); 77 int ret; 78 79 ret = clk_prepare_enable(i2s->clk_sys); 80 if (ret) { 81 dev_err(dev, "Unable to enable sys clock\n"); 82 return ret; 83 } 84 85 return 0; 86 } 87 88 static inline void img_i2s_in_writel(struct img_i2s_in *i2s, u32 val, u32 reg) 89 { 90 writel(val, i2s->base + reg); 91 } 92 93 static inline u32 img_i2s_in_readl(struct img_i2s_in *i2s, u32 reg) 94 { 95 return readl(i2s->base + reg); 96 } 97 98 static inline void img_i2s_in_ch_writel(struct img_i2s_in *i2s, u32 chan, 99 u32 val, u32 reg) 100 { 101 writel(val, i2s->channel_base + (chan * IMG_I2S_IN_CH_STRIDE) + reg); 102 } 103 104 static inline u32 img_i2s_in_ch_readl(struct img_i2s_in *i2s, u32 chan, 105 u32 reg) 106 { 107 return readl(i2s->channel_base + (chan * IMG_I2S_IN_CH_STRIDE) + reg); 108 } 109 110 static inline void img_i2s_in_ch_disable(struct img_i2s_in *i2s, u32 chan) 111 { 112 u32 reg; 113 114 reg = img_i2s_in_ch_readl(i2s, chan, IMG_I2S_IN_CH_CTL); 115 reg &= ~IMG_I2S_IN_CH_CTL_ME_MASK; 116 img_i2s_in_ch_writel(i2s, chan, reg, IMG_I2S_IN_CH_CTL); 117 } 118 119 static inline void img_i2s_in_ch_enable(struct img_i2s_in *i2s, u32 chan) 120 { 121 u32 reg; 122 123 reg = img_i2s_in_ch_readl(i2s, chan, IMG_I2S_IN_CH_CTL); 124 reg |= IMG_I2S_IN_CH_CTL_ME_MASK; 125 img_i2s_in_ch_writel(i2s, chan, reg, IMG_I2S_IN_CH_CTL); 126 } 127 128 static inline void img_i2s_in_disable(struct img_i2s_in *i2s) 129 { 130 u32 reg; 131 132 reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); 133 reg &= ~IMG_I2S_IN_CTL_ME_MASK; 134 img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL); 135 } 136 137 static inline void img_i2s_in_enable(struct img_i2s_in *i2s) 138 { 139 u32 reg; 140 141 reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); 142 reg |= IMG_I2S_IN_CTL_ME_MASK; 143 img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL); 144 } 145 146 static inline void img_i2s_in_flush(struct img_i2s_in *i2s) 147 { 148 int i; 149 u32 reg; 150 151 for (i = 0; i < i2s->active_channels; i++) { 152 reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); 153 reg |= IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK; 154 img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); 155 reg &= ~IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK; 156 img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); 157 } 158 } 159 160 static int img_i2s_in_trigger(struct snd_pcm_substream *substream, int cmd, 161 struct snd_soc_dai *dai) 162 { 163 struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); 164 165 switch (cmd) { 166 case SNDRV_PCM_TRIGGER_START: 167 case SNDRV_PCM_TRIGGER_RESUME: 168 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 169 img_i2s_in_enable(i2s); 170 break; 171 172 case SNDRV_PCM_TRIGGER_STOP: 173 case SNDRV_PCM_TRIGGER_SUSPEND: 174 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 175 img_i2s_in_disable(i2s); 176 break; 177 default: 178 return -EINVAL; 179 } 180 181 return 0; 182 } 183 184 static int img_i2s_in_check_rate(struct img_i2s_in *i2s, 185 unsigned int sample_rate, unsigned int frame_size, 186 unsigned int *bclk_filter_enable, 187 unsigned int *bclk_filter_value) 188 { 189 unsigned int bclk_freq, cur_freq; 190 191 bclk_freq = sample_rate * frame_size; 192 193 cur_freq = clk_get_rate(i2s->clk_sys); 194 195 if (cur_freq >= bclk_freq * 8) { 196 *bclk_filter_enable = 1; 197 *bclk_filter_value = 0; 198 } else if (cur_freq >= bclk_freq * 7) { 199 *bclk_filter_enable = 1; 200 *bclk_filter_value = 1; 201 } else if (cur_freq >= bclk_freq * 6) { 202 *bclk_filter_enable = 0; 203 *bclk_filter_value = 0; 204 } else { 205 dev_err(i2s->dev, 206 "Sys clock rate %u insufficient for sample rate %u\n", 207 cur_freq, sample_rate); 208 return -EINVAL; 209 } 210 211 return 0; 212 } 213 214 static int img_i2s_in_hw_params(struct snd_pcm_substream *substream, 215 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 216 { 217 struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); 218 unsigned int rate, channels, i2s_channels, frame_size; 219 unsigned int bclk_filter_enable, bclk_filter_value; 220 int i, ret = 0; 221 u32 reg, control_mask, chan_control_mask; 222 u32 control_set = 0, chan_control_set = 0; 223 snd_pcm_format_t format; 224 225 rate = params_rate(params); 226 format = params_format(params); 227 channels = params_channels(params); 228 i2s_channels = channels / 2; 229 230 switch (format) { 231 case SNDRV_PCM_FORMAT_S32_LE: 232 frame_size = 64; 233 chan_control_set |= IMG_I2S_IN_CH_CTL_SW_MASK; 234 chan_control_set |= IMG_I2S_IN_CH_CTL_FW_MASK; 235 chan_control_set |= IMG_I2S_IN_CH_CTL_PACKH_MASK; 236 break; 237 case SNDRV_PCM_FORMAT_S24_LE: 238 frame_size = 64; 239 chan_control_set |= IMG_I2S_IN_CH_CTL_SW_MASK; 240 chan_control_set |= IMG_I2S_IN_CH_CTL_FW_MASK; 241 break; 242 case SNDRV_PCM_FORMAT_S16_LE: 243 frame_size = 32; 244 control_set |= IMG_I2S_IN_CTL_16PACK_MASK; 245 chan_control_set |= IMG_I2S_IN_CH_CTL_16PACK_MASK; 246 break; 247 default: 248 return -EINVAL; 249 } 250 251 if ((channels < 2) || 252 (channels > (i2s->max_i2s_chan * 2)) || 253 (channels % 2)) 254 return -EINVAL; 255 256 control_set |= ((i2s_channels - 1) << IMG_I2S_IN_CTL_ACTIVE_CH_SHIFT); 257 258 ret = img_i2s_in_check_rate(i2s, rate, frame_size, 259 &bclk_filter_enable, &bclk_filter_value); 260 if (ret < 0) 261 return ret; 262 263 if (bclk_filter_enable) 264 chan_control_set |= IMG_I2S_IN_CH_CTL_FEN_MASK; 265 266 if (bclk_filter_value) 267 chan_control_set |= IMG_I2S_IN_CH_CTL_FMODE_MASK; 268 269 control_mask = IMG_I2S_IN_CTL_16PACK_MASK | 270 IMG_I2S_IN_CTL_ACTIVE_CHAN_MASK; 271 272 chan_control_mask = IMG_I2S_IN_CH_CTL_16PACK_MASK | 273 IMG_I2S_IN_CH_CTL_FEN_MASK | 274 IMG_I2S_IN_CH_CTL_FMODE_MASK | 275 IMG_I2S_IN_CH_CTL_SW_MASK | 276 IMG_I2S_IN_CH_CTL_FW_MASK | 277 IMG_I2S_IN_CH_CTL_PACKH_MASK; 278 279 reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); 280 reg = (reg & ~control_mask) | control_set; 281 img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL); 282 283 for (i = 0; i < i2s->active_channels; i++) 284 img_i2s_in_ch_disable(i2s, i); 285 286 for (i = 0; i < i2s->max_i2s_chan; i++) { 287 reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); 288 reg = (reg & ~chan_control_mask) | chan_control_set; 289 img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); 290 } 291 292 i2s->active_channels = i2s_channels; 293 294 img_i2s_in_flush(i2s); 295 296 for (i = 0; i < i2s->active_channels; i++) 297 img_i2s_in_ch_enable(i2s, i); 298 299 return 0; 300 } 301 302 static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 303 { 304 struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); 305 int i, ret; 306 u32 chan_control_mask, lrd_set = 0, blkp_set = 0, chan_control_set = 0; 307 u32 reg; 308 309 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 310 case SND_SOC_DAIFMT_NB_NF: 311 lrd_set |= IMG_I2S_IN_CH_CTL_LRD_MASK; 312 break; 313 case SND_SOC_DAIFMT_NB_IF: 314 break; 315 case SND_SOC_DAIFMT_IB_NF: 316 lrd_set |= IMG_I2S_IN_CH_CTL_LRD_MASK; 317 blkp_set |= IMG_I2S_IN_CH_CTL_BLKP_MASK; 318 break; 319 case SND_SOC_DAIFMT_IB_IF: 320 blkp_set |= IMG_I2S_IN_CH_CTL_BLKP_MASK; 321 break; 322 default: 323 return -EINVAL; 324 } 325 326 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 327 case SND_SOC_DAIFMT_I2S: 328 chan_control_set |= IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK; 329 break; 330 case SND_SOC_DAIFMT_LEFT_J: 331 break; 332 default: 333 return -EINVAL; 334 } 335 336 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 337 case SND_SOC_DAIFMT_CBM_CFM: 338 break; 339 default: 340 return -EINVAL; 341 } 342 343 chan_control_mask = IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK; 344 345 ret = pm_runtime_get_sync(i2s->dev); 346 if (ret < 0) { 347 pm_runtime_put_noidle(i2s->dev); 348 return ret; 349 } 350 351 for (i = 0; i < i2s->active_channels; i++) 352 img_i2s_in_ch_disable(i2s, i); 353 354 /* 355 * BLKP and LRD must be set during separate register writes 356 */ 357 for (i = 0; i < i2s->max_i2s_chan; i++) { 358 reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); 359 reg = (reg & ~chan_control_mask) | chan_control_set; 360 img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); 361 reg = (reg & ~IMG_I2S_IN_CH_CTL_BLKP_MASK) | blkp_set; 362 img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); 363 reg = (reg & ~IMG_I2S_IN_CH_CTL_LRD_MASK) | lrd_set; 364 img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); 365 } 366 367 for (i = 0; i < i2s->active_channels; i++) 368 img_i2s_in_ch_enable(i2s, i); 369 370 pm_runtime_put(i2s->dev); 371 372 return 0; 373 } 374 375 static const struct snd_soc_dai_ops img_i2s_in_dai_ops = { 376 .trigger = img_i2s_in_trigger, 377 .hw_params = img_i2s_in_hw_params, 378 .set_fmt = img_i2s_in_set_fmt 379 }; 380 381 static int img_i2s_in_dai_probe(struct snd_soc_dai *dai) 382 { 383 struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); 384 385 snd_soc_dai_init_dma_data(dai, NULL, &i2s->dma_data); 386 387 return 0; 388 } 389 390 static const struct snd_soc_component_driver img_i2s_in_component = { 391 .name = "img-i2s-in" 392 }; 393 394 static int img_i2s_in_dma_prepare_slave_config(struct snd_pcm_substream *st, 395 struct snd_pcm_hw_params *params, struct dma_slave_config *sc) 396 { 397 unsigned int i2s_channels = params_channels(params) / 2; 398 struct snd_soc_pcm_runtime *rtd = st->private_data; 399 struct snd_dmaengine_dai_dma_data *dma_data; 400 int ret; 401 402 dma_data = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), st); 403 404 ret = snd_hwparams_to_dma_slave_config(st, params, sc); 405 if (ret) 406 return ret; 407 408 sc->src_addr = dma_data->addr; 409 sc->src_addr_width = dma_data->addr_width; 410 sc->src_maxburst = 4 * i2s_channels; 411 412 return 0; 413 } 414 415 static const struct snd_dmaengine_pcm_config img_i2s_in_dma_config = { 416 .prepare_slave_config = img_i2s_in_dma_prepare_slave_config 417 }; 418 419 static int img_i2s_in_probe(struct platform_device *pdev) 420 { 421 struct img_i2s_in *i2s; 422 struct resource *res; 423 void __iomem *base; 424 int ret, i; 425 struct reset_control *rst; 426 unsigned int max_i2s_chan_pow_2; 427 struct device *dev = &pdev->dev; 428 429 i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL); 430 if (!i2s) 431 return -ENOMEM; 432 433 platform_set_drvdata(pdev, i2s); 434 435 i2s->dev = dev; 436 437 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 438 if (IS_ERR(base)) 439 return PTR_ERR(base); 440 441 i2s->base = base; 442 443 if (of_property_read_u32(pdev->dev.of_node, "img,i2s-channels", 444 &i2s->max_i2s_chan)) { 445 dev_err(dev, "No img,i2s-channels property\n"); 446 return -EINVAL; 447 } 448 449 max_i2s_chan_pow_2 = 1 << get_count_order(i2s->max_i2s_chan); 450 451 i2s->channel_base = base + (max_i2s_chan_pow_2 * 0x20); 452 453 i2s->clk_sys = devm_clk_get(dev, "sys"); 454 if (IS_ERR(i2s->clk_sys)) { 455 if (PTR_ERR(i2s->clk_sys) != -EPROBE_DEFER) 456 dev_err(dev, "Failed to acquire clock 'sys'\n"); 457 return PTR_ERR(i2s->clk_sys); 458 } 459 460 pm_runtime_enable(&pdev->dev); 461 if (!pm_runtime_enabled(&pdev->dev)) { 462 ret = img_i2s_in_runtime_resume(&pdev->dev); 463 if (ret) 464 goto err_pm_disable; 465 } 466 ret = pm_runtime_resume_and_get(&pdev->dev); 467 if (ret < 0) 468 goto err_suspend; 469 470 i2s->active_channels = 1; 471 i2s->dma_data.addr = res->start + IMG_I2S_IN_RX_FIFO; 472 i2s->dma_data.addr_width = 4; 473 474 i2s->dai_driver.probe = img_i2s_in_dai_probe; 475 i2s->dai_driver.capture.channels_min = 2; 476 i2s->dai_driver.capture.channels_max = i2s->max_i2s_chan * 2; 477 i2s->dai_driver.capture.rates = SNDRV_PCM_RATE_8000_192000; 478 i2s->dai_driver.capture.formats = SNDRV_PCM_FMTBIT_S32_LE | 479 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE; 480 i2s->dai_driver.ops = &img_i2s_in_dai_ops; 481 482 rst = devm_reset_control_get_exclusive(dev, "rst"); 483 if (IS_ERR(rst)) { 484 if (PTR_ERR(rst) == -EPROBE_DEFER) { 485 ret = -EPROBE_DEFER; 486 pm_runtime_put(&pdev->dev); 487 goto err_suspend; 488 } 489 490 dev_dbg(dev, "No top level reset found\n"); 491 492 img_i2s_in_disable(i2s); 493 494 for (i = 0; i < i2s->max_i2s_chan; i++) 495 img_i2s_in_ch_disable(i2s, i); 496 } else { 497 reset_control_assert(rst); 498 reset_control_deassert(rst); 499 } 500 501 img_i2s_in_writel(i2s, 0, IMG_I2S_IN_CTL); 502 503 for (i = 0; i < i2s->max_i2s_chan; i++) 504 img_i2s_in_ch_writel(i2s, i, 505 (4 << IMG_I2S_IN_CH_CTL_CCDEL_SHIFT) | 506 IMG_I2S_IN_CH_CTL_JUST_MASK | 507 IMG_I2S_IN_CH_CTL_FW_MASK, IMG_I2S_IN_CH_CTL); 508 509 pm_runtime_put(&pdev->dev); 510 511 i2s->suspend_ch_ctl = devm_kcalloc(dev, 512 i2s->max_i2s_chan, sizeof(*i2s->suspend_ch_ctl), GFP_KERNEL); 513 if (!i2s->suspend_ch_ctl) { 514 ret = -ENOMEM; 515 goto err_suspend; 516 } 517 518 ret = devm_snd_soc_register_component(dev, &img_i2s_in_component, 519 &i2s->dai_driver, 1); 520 if (ret) 521 goto err_suspend; 522 523 ret = devm_snd_dmaengine_pcm_register(dev, &img_i2s_in_dma_config, 0); 524 if (ret) 525 goto err_suspend; 526 527 return 0; 528 529 err_suspend: 530 if (!pm_runtime_enabled(&pdev->dev)) 531 img_i2s_in_runtime_suspend(&pdev->dev); 532 err_pm_disable: 533 pm_runtime_disable(&pdev->dev); 534 535 return ret; 536 } 537 538 static int img_i2s_in_dev_remove(struct platform_device *pdev) 539 { 540 pm_runtime_disable(&pdev->dev); 541 if (!pm_runtime_status_suspended(&pdev->dev)) 542 img_i2s_in_runtime_suspend(&pdev->dev); 543 544 return 0; 545 } 546 547 #ifdef CONFIG_PM_SLEEP 548 static int img_i2s_in_suspend(struct device *dev) 549 { 550 struct img_i2s_in *i2s = dev_get_drvdata(dev); 551 int i, ret; 552 u32 reg; 553 554 if (pm_runtime_status_suspended(dev)) { 555 ret = img_i2s_in_runtime_resume(dev); 556 if (ret) 557 return ret; 558 } 559 560 for (i = 0; i < i2s->max_i2s_chan; i++) { 561 reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); 562 i2s->suspend_ch_ctl[i] = reg; 563 } 564 565 i2s->suspend_ctl = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); 566 567 img_i2s_in_runtime_suspend(dev); 568 569 return 0; 570 } 571 572 static int img_i2s_in_resume(struct device *dev) 573 { 574 struct img_i2s_in *i2s = dev_get_drvdata(dev); 575 int i, ret; 576 u32 reg; 577 578 ret = img_i2s_in_runtime_resume(dev); 579 if (ret) 580 return ret; 581 582 for (i = 0; i < i2s->max_i2s_chan; i++) { 583 reg = i2s->suspend_ch_ctl[i]; 584 img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); 585 } 586 587 img_i2s_in_writel(i2s, i2s->suspend_ctl, IMG_I2S_IN_CTL); 588 589 if (pm_runtime_status_suspended(dev)) 590 img_i2s_in_runtime_suspend(dev); 591 592 return 0; 593 } 594 #endif 595 596 static const struct of_device_id img_i2s_in_of_match[] = { 597 { .compatible = "img,i2s-in" }, 598 {} 599 }; 600 MODULE_DEVICE_TABLE(of, img_i2s_in_of_match); 601 602 static const struct dev_pm_ops img_i2s_in_pm_ops = { 603 SET_RUNTIME_PM_OPS(img_i2s_in_runtime_suspend, 604 img_i2s_in_runtime_resume, NULL) 605 SET_SYSTEM_SLEEP_PM_OPS(img_i2s_in_suspend, img_i2s_in_resume) 606 }; 607 608 static struct platform_driver img_i2s_in_driver = { 609 .driver = { 610 .name = "img-i2s-in", 611 .of_match_table = img_i2s_in_of_match, 612 .pm = &img_i2s_in_pm_ops 613 }, 614 .probe = img_i2s_in_probe, 615 .remove = img_i2s_in_dev_remove 616 }; 617 module_platform_driver(img_i2s_in_driver); 618 619 MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>"); 620 MODULE_DESCRIPTION("IMG I2S Input Driver"); 621 MODULE_LICENSE("GPL v2"); 622