1 // SPDX-License-Identifier: GPL-2.0
74 /* MOD1 is a 24-bit primary modulus with fixed value of 2^25 */
76 /* MOD2 is the programmable, 14-bit auxiliary fractional modulus */
163 	 * Lock for accessing device registers. Some operations require
169 	struct mutex lock;  member
188 	val = (((u64)st->integer * ADF4371_MODULUS1) + st->fract1) * st->fpfd;  in adf4371_pll_fract_n_get_rate()
189 	tmp = (u64)st->fract2 * st->fpfd;  in adf4371_pll_fract_n_get_rate()
190 	do_div(tmp, st->mod2);  in adf4371_pll_fract_n_get_rate()
194 		ref_div_sel = st->rf_div_sel;  in adf4371_pll_fract_n_get_rate()
248 			return -EINVAL;  in adf4371_set_freq()
250 		st->rf_div_sel = 0;  in adf4371_set_freq()
254 			st->rf_div_sel++;  in adf4371_set_freq()
260 			return -EINVAL;  in adf4371_set_freq()
267 			return -EINVAL;  in adf4371_set_freq()
272 		return -EINVAL;  in adf4371_set_freq()
275 	adf4371_pll_fract_n_compute(freq, st->fpfd, &st->integer, &st->fract1,  in adf4371_set_freq()
276 				    &st->fract2, &st->mod2);  in adf4371_set_freq()
277 	st->buf[0] = st->integer >> 8;  in adf4371_set_freq()
278 	st->buf[1] = 0x40; /* REG12 default */  in adf4371_set_freq()
279 	st->buf[2] = 0x00;  in adf4371_set_freq()
280 	st->buf[3] = st->fract1 & 0xFF;  in adf4371_set_freq()
281 	st->buf[4] = st->fract1 >> 8;  in adf4371_set_freq()
282 	st->buf[5] = st->fract1 >> 16;  in adf4371_set_freq()
283 	st->buf[6] = ADF4371_FRAC2WORD_L(st->fract2 & 0x7F) |  in adf4371_set_freq()
284 		     ADF4371_FRAC1WORD(st->fract1 >> 24);  in adf4371_set_freq()
285 	st->buf[7] = ADF4371_FRAC2WORD_H(st->fract2 >> 7);  in adf4371_set_freq()
286 	st->buf[8] = st->mod2 & 0xFF;  in adf4371_set_freq()
287 	st->buf[9] = ADF4371_MOD2WORD(st->mod2 >> 8);  in adf4371_set_freq()
289 	ret = regmap_bulk_write(st->regmap, ADF4371_REG(0x11), st->buf, 10);  in adf4371_set_freq()
296 	ret = regmap_write(st->regmap, ADF4371_REG(0x1F), st->ref_div_factor);  in adf4371_set_freq()
300 	ret = regmap_update_bits(st->regmap, ADF4371_REG(0x24),  in adf4371_set_freq()
302 				 ADF4371_RF_DIV_SEL(st->rf_div_sel));  in adf4371_set_freq()
306 	cp_bleed = DIV_ROUND_UP(400 * 1750, st->integer * 375);  in adf4371_set_freq()
308 	ret = regmap_write(st->regmap, ADF4371_REG(0x26), cp_bleed);  in adf4371_set_freq()
315 	if (st->fract1 == 0 && st->fract2 == 0)  in adf4371_set_freq()
318 	ret = regmap_write(st->regmap, ADF4371_REG(0x2B), int_mode);  in adf4371_set_freq()
322 	return regmap_write(st->regmap, ADF4371_REG(0x10), st->integer & 0xFF);  in adf4371_set_freq()
337 		val = adf4371_pll_fract_n_get_rate(st, chan->channel);  in adf4371_read()
338 		ret = regmap_read(st->regmap, ADF4371_REG(0x7C), &readval);  in adf4371_read()
343 			dev_dbg(&st->spi->dev, "PLL un-locked\n");  in adf4371_read()
344 			ret = -EBUSY;  in adf4371_read()
348 		reg = adf4371_pwrdown_ch[chan->channel].reg;  in adf4371_read()
349 		bit = adf4371_pwrdown_ch[chan->channel].bit;  in adf4371_read()
351 		ret = regmap_read(st->regmap, reg, &readval);  in adf4371_read()
358 		return sprintf(buf, "%s\n", adf4371_ch_names[chan->channel]);  in adf4371_read()
360 		ret = -EINVAL;  in adf4371_read()
379 	mutex_lock(&st->lock);  in adf4371_write()
386 		ret = adf4371_set_freq(st, freq, chan->channel);  in adf4371_write()
393 		reg = adf4371_pwrdown_ch[chan->channel].reg;  in adf4371_write()
394 		bit = adf4371_pwrdown_ch[chan->channel].bit;  in adf4371_write()
395 		ret = regmap_read(st->regmap, reg, &readval);  in adf4371_write()
402 		ret = regmap_write(st->regmap, reg, readval);  in adf4371_write()
405 		ret = -EINVAL;  in adf4371_write()
408 	mutex_unlock(&st->lock);  in adf4371_write()
468 		return regmap_read(st->regmap, reg, readval);  in adf4371_reg_access()
470 		return regmap_write(st->regmap, reg, writeval);  in adf4371_reg_access()
484 	ret = regmap_write(st->regmap, ADF4371_REG(0x0), ADF4371_RESET_CMD);  in adf4371_setup()
488 	ret = regmap_multi_reg_write(st->regmap, adf4371_reg_defaults,  in adf4371_setup()
493 	/* Mute to Lock Detect */  in adf4371_setup()
494 	if (device_property_read_bool(&st->spi->dev, "adi,mute-till-lock-en")) {  in adf4371_setup()
495 		ret = regmap_update_bits(st->regmap, ADF4371_REG(0x25),  in adf4371_setup()
503 	ret = regmap_update_bits(st->regmap, ADF4371_REG(0x0),  in adf4371_setup()
516 		st->ref_div_factor++;  in adf4371_setup()
517 		st->fpfd = st->clkin_freq / st->ref_div_factor;  in adf4371_setup()
518 	} while (st->fpfd > ADF4371_MAX_FREQ_PFD);  in adf4371_setup()
521 	vco_band_div = DIV_ROUND_UP(st->fpfd, 2400000U);  in adf4371_setup()
523 	tmp = DIV_ROUND_CLOSEST(st->fpfd, 1000000U);  in adf4371_setup()
534 	} while (vco_alc_timeout * 1024 - timeout <= 50 * tmp);  in adf4371_setup()
536 	st->buf[0] = vco_band_div;  in adf4371_setup()
537 	st->buf[1] = timeout & 0xFF;  in adf4371_setup()
538 	st->buf[2] = ADF4371_TIMEOUT(timeout >> 8) | 0x04;  in adf4371_setup()
539 	st->buf[3] = synth_timeout;  in adf4371_setup()
540 	st->buf[4] = ADF4371_VCO_ALC_TOUT(vco_alc_timeout);  in adf4371_setup()
542 	return regmap_bulk_write(st->regmap, ADF4371_REG(0x30), st->buf, 5);  in adf4371_setup()
553 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in adf4371_probe()
555 		return -ENOMEM;  in adf4371_probe()
559 		return dev_err_probe(&spi->dev, PTR_ERR(regmap),  in adf4371_probe()
563 	st->spi = spi;  in adf4371_probe()
564 	st->regmap = regmap;  in adf4371_probe()
565 	mutex_init(&st->lock);  in adf4371_probe()
567 	st->chip_info = spi_get_device_match_data(spi);  in adf4371_probe()
568 	if (!st->chip_info)  in adf4371_probe()
569 		return -ENODEV;  in adf4371_probe()
571 	indio_dev->name = st->chip_info->name;  in adf4371_probe()
572 	indio_dev->info = &adf4371_info;  in adf4371_probe()
573 	indio_dev->modes = INDIO_DIRECT_MODE;  in adf4371_probe()
574 	indio_dev->channels = st->chip_info->channels;  in adf4371_probe()
575 	indio_dev->num_channels = st->chip_info->num_channels;  in adf4371_probe()
577 	clkin = devm_clk_get_enabled(&spi->dev, "clkin");  in adf4371_probe()
579 		return dev_err_probe(&spi->dev, PTR_ERR(clkin),  in adf4371_probe()
582 	st->clkin_freq = clk_get_rate(clkin);  in adf4371_probe()
586 		return dev_err_probe(&spi->dev, ret, "ADF4371 setup failed\n");  in adf4371_probe()
588 	return devm_iio_device_register(&spi->dev, indio_dev);  in adf4371_probe()