1 // SPDX-License-Identifier: GPL-2.0
27 #define RTQ6056_REG_CONFIG	0x00
28 #define RTQ6056_REG_SHUNTVOLT	0x01
29 #define RTQ6056_REG_BUSVOLT	0x02
30 #define RTQ6056_REG_POWER	0x03
31 #define RTQ6056_REG_CURRENT	0x04
32 #define RTQ6056_REG_CALIBRATION	0x05
33 #define RTQ6056_REG_MASKENABLE	0x06
34 #define RTQ6056_REG_ALERTLIMIT	0x07
35 #define RTQ6056_REG_MANUFACTID	0xFE
36 #define RTQ6056_REG_DIEID	0xFF
38 #define RTQ6056_VENDOR_ID	0x1214
39 #define RTQ6056_DEFAULT_CONFIG	0x4127
42 #define RTQ6059_DEFAULT_CONFIG	0x3C47
47 	RTQ6056_CH_VSHUNT = 0,
55  * The enum is to present the 0x00 CONFIG RG bitfield for the 16bit RG value
57  * RTQ6053/6 is OPMODE->VSHUNTCT->VBUSCT->AVG->RESET
58  * RTQ6059 is OPMODE->SADC->BADC->PGA->RESET
61 	F_OPMODE = 0,
101 	[F_OPMODE] = REG_FIELD(RTQ6056_REG_CONFIG, 0, 2),
109 	[F_OPMODE] = REG_FIELD(RTQ6056_REG_CONFIG, 0, 2),
119 		.indexed = 1,
120 		.channel = 0,
128 		.scan_index = 0,
138 		.indexed = 1,
157 		.indexed = 1,
175 		.indexed = 1,
195  * - Fixed sampling conversion time
196  * - Average sample numbers
197  * - Channel scale
198  * - calibration coefficient
203 		.indexed = 1,
204 		.channel = 0,
211 		.scan_index = 0,
221 		.indexed = 1,
239 		.indexed = 1,
257 		.indexed = 1,
279 	const struct richtek_dev_data *devdata = priv->devdata;  in rtq6056_adc_read_channel()
280 	struct device *dev = priv->dev;  in rtq6056_adc_read_channel()
281 	unsigned int addr = ch->address;  in rtq6056_adc_read_channel()
286 	ret = regmap_read(priv->regmap, addr, &regval);  in rtq6056_adc_read_channel()
292 	/* Power and VBUS is unsigned 16-bit, others are signed 16-bit */  in rtq6056_adc_read_channel()
295 		regval >>= devdata->vbus_offset;  in rtq6056_adc_read_channel()
306 		return -EINVAL;  in rtq6056_adc_read_channel()
313 	switch (ch->address) {  in rtq6056_adc_read_scale()
329 		return -EINVAL;  in rtq6056_adc_read_scale()
336 	switch (ch->address) {  in rtq6059_adc_read_scale()
351 		return -EINVAL;  in rtq6059_adc_read_scale()
358  * https://www.richtek.com/assets/product_file/RTQ6056/DSQ6056-00.pdf
372 		return -EINVAL;  in rtq6056_adc_set_samp_freq()
374 	if (ch->address == RTQ6056_REG_SHUNTVOLT) {  in rtq6056_adc_set_samp_freq()
375 		rm_field = priv->rm_fields[F_VSHUNTCT];  in rtq6056_adc_set_samp_freq()
376 		ct = &priv->vshuntct_us;  in rtq6056_adc_set_samp_freq()
377 	} else if (ch->address == RTQ6056_REG_BUSVOLT) {  in rtq6056_adc_set_samp_freq()
378 		rm_field = priv->rm_fields[F_VBUSCT];  in rtq6056_adc_set_samp_freq()
379 		ct = &priv->vbusct_us;  in rtq6056_adc_set_samp_freq()
381 		return -EINVAL;  in rtq6056_adc_set_samp_freq()
392 	return 0;  in rtq6056_adc_set_samp_freq()
398  * https://www.richtek.com/assets/product_file/RTQ6056/DSQ6056-00.pdf
414 		return -EINVAL;  in rtq6056_adc_set_average()
419 	ret = regmap_field_write(priv->rm_fields[F_AVG], selector);  in rtq6056_adc_set_average()
423 	priv->avg_sample = rtq6056_avg_sample_list[selector];  in rtq6056_adc_set_average()
425 	return 0;  in rtq6056_adc_set_average()
434 		return -EINVAL;  in rtq6059_adc_set_average()
436 	/* The supported average sample is 2^x (x from 0 to 7) */  in rtq6059_adc_set_average()
437 	selector = fls(val) - 1;  in rtq6059_adc_set_average()
439 	ret = regmap_field_write(priv->rm_fields[F_RTQ6059_BADC],  in rtq6059_adc_set_average()
444 	ret = regmap_field_write(priv->rm_fields[F_RTQ6059_SADC],  in rtq6059_adc_set_average()
447 	priv->avg_sample = BIT(selector);  in rtq6059_adc_set_average()
449 	return 0;  in rtq6059_adc_set_average()
457 	if (ch->address == RTQ6056_REG_SHUNTVOLT)  in rtq6056_adc_get_sample_freq()
458 		sample_time = priv->vshuntct_us;  in rtq6056_adc_get_sample_freq()
459 	else if (ch->address == RTQ6056_REG_BUSVOLT)  in rtq6056_adc_get_sample_freq()
460 		sample_time = priv->vbusct_us;  in rtq6056_adc_get_sample_freq()
462 		sample_time = priv->vshuntct_us + priv->vbusct_us;  in rtq6056_adc_get_sample_freq()
463 		sample_time *= priv->avg_sample;  in rtq6056_adc_get_sample_freq()
476 	const struct richtek_dev_data *devdata = priv->devdata;  in rtq6056_adc_read_raw()
482 		return devdata->read_scale(chan, val, val2);  in rtq6056_adc_read_raw()
484 		*val = priv->avg_sample;  in rtq6056_adc_read_raw()
489 		return -EINVAL;  in rtq6056_adc_read_raw()
499 	const struct richtek_dev_data *devdata = priv->devdata;  in rtq6056_adc_read_avail()
508 		*vals = devdata->avg_sample_list;  in rtq6056_adc_read_avail()
509 		*length = devdata->avg_sample_list_length;  in rtq6056_adc_read_avail()
513 		return -EINVAL;  in rtq6056_adc_read_avail()
522 	const struct richtek_dev_data *devdata = priv->devdata;  in rtq6056_adc_write_raw()
524 	iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {  in rtq6056_adc_write_raw()
527 			if (devdata->fixed_samp_freq)  in rtq6056_adc_write_raw()
528 				return -EINVAL;  in rtq6056_adc_write_raw()
531 			return devdata->set_average(priv, val);  in rtq6056_adc_write_raw()
533 			return -EINVAL;  in rtq6056_adc_write_raw()
550 	return sysfs_emit(label, "%s\n", rtq6056_channel_labels[chan->channel]);  in rtq6056_adc_read_label()
556 	const struct richtek_dev_data *devdata = priv->devdata;  in rtq6056_set_shunt_resistor()
560 	if (resistor_uohm <= 0) {  in rtq6056_set_shunt_resistor()
561 		dev_err(priv->dev, "Invalid resistor [%d]\n", resistor_uohm);  in rtq6056_set_shunt_resistor()
562 		return -EINVAL;  in rtq6056_set_shunt_resistor()
566 	calib_val = devdata->calib_coefficient / resistor_uohm;  in rtq6056_set_shunt_resistor()
567 	ret = regmap_write(priv->regmap, RTQ6056_REG_CALIBRATION, calib_val);  in rtq6056_set_shunt_resistor()
571 	priv->shunt_resistor_uohm = resistor_uohm;  in rtq6056_set_shunt_resistor()
573 	return 0;  in rtq6056_set_shunt_resistor()
580 	int vals[2] = { priv->shunt_resistor_uohm, 1000000 };  in shunt_resistor_show()
609 static IIO_DEVICE_ATTR_RW(shunt_resistor, 0);
631 	struct iio_dev *indio_dev = pf->indio_dev;  in rtq6056_buffer_trigger_handler()
633 	const struct richtek_dev_data *devdata = priv->devdata;  in rtq6056_buffer_trigger_handler()
634 	struct device *dev = priv->dev;  in rtq6056_buffer_trigger_handler()
640 	int i = 0, bit, ret;  in rtq6056_buffer_trigger_handler()
642 	memset(&data, 0, sizeof(data));  in rtq6056_buffer_trigger_handler()
649 		ret = regmap_read(priv->regmap, addr, &raw);  in rtq6056_buffer_trigger_handler()
654 			raw >>= devdata->vbus_offset;  in rtq6056_buffer_trigger_handler()
665 	iio_trigger_notify_done(indio_dev->trig);  in rtq6056_buffer_trigger_handler()
675 	regmap_field_write(priv->rm_fields[F_OPMODE], 0);  in rtq6056_enter_shutdown_state()
713 	struct device *dev = &i2c->dev;  in rtq6056_probe()
719 	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_WORD_DATA))  in rtq6056_probe()
720 		return -EOPNOTSUPP;  in rtq6056_probe()
724 		return dev_err_probe(dev, -EINVAL, "Invalid dev data\n");  in rtq6056_probe()
728 		return -ENOMEM;  in rtq6056_probe()
731 	priv->dev = dev;  in rtq6056_probe()
732 	priv->vshuntct_us = priv->vbusct_us = devdata->default_conv_time_us;  in rtq6056_probe()
733 	priv->avg_sample = 1;  in rtq6056_probe()
734 	priv->devdata = devdata;  in rtq6056_probe()
742 	priv->regmap = regmap;  in rtq6056_probe()
750 		return dev_err_probe(dev, -ENODEV,  in rtq6056_probe()
751 				     "Invalid vendor id 0x%04x\n", vendor_id);  in rtq6056_probe()
753 	ret = devm_regmap_field_bulk_alloc(dev, regmap, priv->rm_fields,  in rtq6056_probe()
754 					   devdata->reg_fields, F_MAX_FIELDS);  in rtq6056_probe()
758 	ret = regmap_write(regmap, RTQ6056_REG_CONFIG, devdata->default_config);  in rtq6056_probe()
775 	/* By default, use 2000 micro-Ohm resistor */  in rtq6056_probe()
777 	device_property_read_u32(dev, "shunt-resistor-micro-ohms",  in rtq6056_probe()
785 	indio_dev->name = "rtq6056";  in rtq6056_probe()
786 	indio_dev->modes = INDIO_DIRECT_MODE;  in rtq6056_probe()
787 	indio_dev->channels = devdata->channels;  in rtq6056_probe()
788 	indio_dev->num_channels = devdata->num_channels;  in rtq6056_probe()
789 	indio_dev->info = &rtq6056_info;  in rtq6056_probe()
806 	return regmap_field_write(priv->rm_fields[F_OPMODE], 0);  in rtq6056_runtime_suspend()
814 	ret = regmap_field_write(priv->rm_fields[F_OPMODE], RTQ6056_CONT_ALLON);  in rtq6056_runtime_resume()
818 	sample_rdy_time_us = priv->vbusct_us + priv->vshuntct_us;  in rtq6056_runtime_resume()
819 	sample_rdy_time_us *= priv->avg_sample;  in rtq6056_runtime_resume()
823 	return 0;  in rtq6056_runtime_resume()