181 meson_saradc_get_fifo_count(struct meson_saradc_priv *priv)  in meson_saradc_get_fifo_count()  argument
185 	regmap_read(priv->regmap, MESON_SAR_ADC_REG0, &regval);  in meson_saradc_get_fifo_count()
190 static int meson_saradc_lock(struct meson_saradc_priv *priv)  in meson_saradc_lock()  argument
195 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,  in meson_saradc_lock()
204 		regmap_read(priv->regmap, MESON_SAR_ADC_DELAY, &val);  in meson_saradc_lock()
215 static void meson_saradc_unlock(struct meson_saradc_priv *priv)  in meson_saradc_unlock()  argument
218 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,  in meson_saradc_unlock()
222 static void meson_saradc_clear_fifo(struct meson_saradc_priv *priv)  in meson_saradc_clear_fifo()  argument
227 		if (!meson_saradc_get_fifo_count(priv))  in meson_saradc_clear_fifo()
230 		regmap_read(priv->regmap, MESON_SAR_ADC_FIFO_RD, &tmp);  in meson_saradc_clear_fifo()
234 static int meson_saradc_calib_val(struct meson_saradc_priv *priv, int val)  in meson_saradc_calib_val()  argument
239 	tmp = div_s64((s64)val * priv->calibscale, MILLION) + priv->calibbias;  in meson_saradc_calib_val()
241 	return clamp(tmp, 0, (1 << priv->data->num_bits) - 1);  in meson_saradc_calib_val()
244 static int meson_saradc_wait_busy_clear(struct meson_saradc_priv *priv)  in meson_saradc_wait_busy_clear()  argument
255 		regmap_read(priv->regmap, MESON_SAR_ADC_REG0, &regval);  in meson_saradc_wait_busy_clear()
264 static int meson_saradc_read_raw_sample(struct meson_saradc_priv *priv,  in meson_saradc_read_raw_sample()  argument
270 	ret = meson_saradc_wait_busy_clear(priv);  in meson_saradc_read_raw_sample()
274 	count = meson_saradc_get_fifo_count(priv);  in meson_saradc_read_raw_sample()
280 	regmap_read(priv->regmap, MESON_SAR_ADC_FIFO_RD, &regval);  in meson_saradc_read_raw_sample()
289 	fifo_val &= GENMASK(priv->data->num_bits - 1, 0);  in meson_saradc_read_raw_sample()
290 	*val = meson_saradc_calib_val(priv, fifo_val);  in meson_saradc_read_raw_sample()
295 static void meson_saradc_start_sample_engine(struct meson_saradc_priv *priv)  in meson_saradc_start_sample_engine()  argument
297 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_start_sample_engine()
301 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_start_sample_engine()
305 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_start_sample_engine()
310 static void meson_saradc_stop_sample_engine(struct meson_saradc_priv *priv)  in meson_saradc_stop_sample_engine()  argument
312 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_stop_sample_engine()
315 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_stop_sample_engine()
320 	meson_saradc_wait_busy_clear(priv);  in meson_saradc_stop_sample_engine()
322 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_stop_sample_engine()
339 static void meson_saradc_set_averaging(struct meson_saradc_priv *priv,  in meson_saradc_set_averaging()  argument
347 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_AVG_CNTL,  in meson_saradc_set_averaging()
352 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_AVG_CNTL,  in meson_saradc_set_averaging()
356 static void meson_saradc_enable_channel(struct meson_saradc_priv *priv,  in meson_saradc_enable_channel()  argument
367 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_CHAN_LIST,  in meson_saradc_enable_channel()
372 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_CHAN_LIST,  in meson_saradc_enable_channel()
377 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DETECT_IDLE_SW,  in meson_saradc_enable_channel()
383 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DETECT_IDLE_SW,  in meson_saradc_enable_channel()
388 		regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELTA_10,  in meson_saradc_enable_channel()
392 static int meson_saradc_get_sample(struct meson_saradc_priv *priv,  in meson_saradc_get_sample()  argument
397 	ret = meson_saradc_lock(priv);  in meson_saradc_get_sample()
402 	meson_saradc_clear_fifo(priv);  in meson_saradc_get_sample()
404 	meson_saradc_set_averaging(priv, chan, MEAN_AVERAGING, EIGHT_SAMPLES);  in meson_saradc_get_sample()
406 	meson_saradc_enable_channel(priv, chan);  in meson_saradc_get_sample()
408 	meson_saradc_start_sample_engine(priv);  in meson_saradc_get_sample()
409 	ret = meson_saradc_read_raw_sample(priv, chan, val);  in meson_saradc_get_sample()
410 	meson_saradc_stop_sample_engine(priv);  in meson_saradc_get_sample()
412 	meson_saradc_unlock(priv);  in meson_saradc_get_sample()
426 	struct meson_saradc_priv *priv = dev_get_priv(dev);  in meson_saradc_channel_data()  local
428 	if (channel != priv->active_channel) {  in meson_saradc_channel_data()
433 	return meson_saradc_get_sample(priv, channel, data);  in meson_saradc_channel_data()
445 static void meson_saradc_set_chan7_mux(struct meson_saradc_priv *priv,  in meson_saradc_set_chan7_mux()  argument
451 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG3,  in meson_saradc_set_chan7_mux()
457 static int meson_saradc_calib(struct meson_saradc_priv *priv)  in meson_saradc_calib()  argument
463 	nominal0 = (1 << priv->data->num_bits) / 4;  in meson_saradc_calib()
464 	nominal1 = (1 << priv->data->num_bits) * 3 / 4;  in meson_saradc_calib()
466 	meson_saradc_set_chan7_mux(priv, CHAN7_MUX_VDD_DIV4);  in meson_saradc_calib()
468 	ret = meson_saradc_get_sample(priv, 7, &value0);  in meson_saradc_calib()
472 	meson_saradc_set_chan7_mux(priv, CHAN7_MUX_VDD_MUL3_DIV4);  in meson_saradc_calib()
474 	ret = meson_saradc_get_sample(priv, 7, &value1);  in meson_saradc_calib()
483 	priv->calibscale = div_s64((nominal1 - nominal0) * (s64)MILLION,  in meson_saradc_calib()
485 	priv->calibbias = nominal0 - div_s64((s64)value0 * priv->calibscale,  in meson_saradc_calib()
489 	meson_saradc_set_chan7_mux(priv, CHAN7_MUX_CH7_INPUT);  in meson_saradc_calib()
494 static int meson_saradc_init(struct meson_saradc_priv *priv)  in meson_saradc_init()  argument
499 	priv->calibscale = MILLION;  in meson_saradc_init()
505 	meson_saradc_set_chan7_mux(priv, CHAN7_MUX_CH7_INPUT);  in meson_saradc_init()
512 	regmap_read(priv->regmap, MESON_SAR_ADC_REG3, &regval);  in meson_saradc_init()
516 	meson_saradc_stop_sample_engine(priv);  in meson_saradc_init()
519 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_init()
524 	regmap_write(priv->regmap, MESON_SAR_ADC_CHAN_LIST, 0x0);  in meson_saradc_init()
526 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG3,  in meson_saradc_init()
528 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG3,  in meson_saradc_init()
533 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,  in meson_saradc_init()
537 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,  in meson_saradc_init()
543 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,  in meson_saradc_init()
547 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,  in meson_saradc_init()
557 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_CHAN_10_SW,  in meson_saradc_init()
561 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_CHAN_10_SW,  in meson_saradc_init()
576 	regmap_write(priv->regmap, MESON_SAR_ADC_AUX_SW, regval);  in meson_saradc_init()
578 	ret = meson_saradc_lock(priv);  in meson_saradc_init()
583 	ret = clk_enable(&priv->core_clk);  in meson_saradc_init()
589 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,  in meson_saradc_init()
592 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG11,  in meson_saradc_init()
596 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG3,  in meson_saradc_init()
603 	ret = clk_enable(&priv->adc_clk);  in meson_saradc_init()
608 	meson_saradc_unlock(priv);  in meson_saradc_init()
610 	ret = meson_saradc_calib(priv);  in meson_saradc_init()
621 	struct meson_saradc_priv *priv = dev_get_priv(dev);  in meson_saradc_start_channel()  local
628 	if (!priv->initialized) {  in meson_saradc_start_channel()
631 		ret = meson_saradc_init(priv);  in meson_saradc_start_channel()
635 		priv->initialized = true;  in meson_saradc_start_channel()
638 	priv->active_channel = channel;  in meson_saradc_start_channel()
645 	struct meson_saradc_priv *priv = dev_get_priv(dev);  in meson_saradc_stop()  local
647 	priv->active_channel = -1;  in meson_saradc_stop()
654 	struct meson_saradc_priv *priv = dev_get_priv(dev);  in meson_saradc_probe()  local
657 	ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);  in meson_saradc_probe()
662 	ret = clk_get_by_name(dev, "core", &priv->core_clk);  in meson_saradc_probe()
666 	ret = clk_get_by_name(dev, "adc_clk", &priv->adc_clk);  in meson_saradc_probe()
671 	priv->active_channel = -1;  in meson_saradc_probe()
679 	struct meson_saradc_priv *priv = dev_get_priv(dev);  in meson_saradc_ofdata_to_platdata()  local
681 	priv->data = (struct meson_saradc_data *)dev_get_driver_data(dev);  in meson_saradc_ofdata_to_platdata()
683 	uc_pdata->data_mask = GENMASK(priv->data->num_bits - 1, 0);  in meson_saradc_ofdata_to_platdata()