1 // SPDX-License-Identifier: GPL-2.0-or-later
4  * Step-Down Switching Regulators
50 	enum chips id;  member
111 	int *idxp = file->private_data;  in max20730_debugfs_read()
120 	info = pmbus_get_driver_info(psu->client);  in max20730_debugfs_read()
125 		ret = VOLT_FROM_REG(data->mfr_voutmin * 10000);  in max20730_debugfs_read()
130 		val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_FSW_MASK)  in max20730_debugfs_read()
148 		val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_TSTAT_MASK)  in max20730_debugfs_read()
161 		val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_RGAIN_MASK)  in max20730_debugfs_read()
164 		if (data->id == max20734) {  in max20730_debugfs_read()
174 		} else if (data->id == max20730 || data->id == max20710) {  in max20730_debugfs_read()
184 		} else if (data->id == max20743) {  in max20730_debugfs_read()
199 		val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_VBOOT_MASK)  in max20730_debugfs_read()
212 		val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_VRATE)  in max20730_debugfs_read()
225 		ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_OCPM_MASK)  in max20730_debugfs_read()
230 		val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_SS_MASK)  in max20730_debugfs_read()
243 		ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_IMAX_MASK)  in max20730_debugfs_read()
248 		ret = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);  in max20730_debugfs_read()
254 		ret = i2c_smbus_read_byte_data(psu->client, PMBUS_ON_OFF_CONFIG);  in max20730_debugfs_read()
260 		ret = i2c_smbus_read_word_data(psu->client,  in max20730_debugfs_read()
267 		ret = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_MODE);  in max20730_debugfs_read()
273 		ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_COMMAND);  in max20730_debugfs_read()
282 		ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_MAX);  in max20730_debugfs_read()
316 	data->mfr_devset2 = ret;  in max20730_init_debugfs()
321 	data->mfr_voutmin = ret;  in max20730_init_debugfs()
323 	psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);  in max20730_init_debugfs()
325 		return -ENOMEM;  in max20730_init_debugfs()
326 	psu->client = client;  in max20730_init_debugfs()
330 		return -ENOENT;  in max20730_init_debugfs()
332 	max20730_dir = debugfs_create_dir(client->name, debugfs);  in max20730_init_debugfs()
335 		psu->debugfs_entries[i] = i;  in max20730_init_debugfs()
338 			    &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MIN],  in max20730_init_debugfs()
341 			    &psu->debugfs_entries[MAX20730_DEBUGFS_FREQUENCY],  in max20730_init_debugfs()
344 			    &psu->debugfs_entries[MAX20730_DEBUGFS_PG_DELAY],  in max20730_init_debugfs()
347 			    &psu->debugfs_entries[MAX20730_DEBUGFS_INTERNAL_GAIN],  in max20730_init_debugfs()
350 			    &psu->debugfs_entries[MAX20730_DEBUGFS_BOOT_VOLTAGE],  in max20730_init_debugfs()
353 			    &psu->debugfs_entries[MAX20730_DEBUGFS_OUT_V_RAMP_RATE],  in max20730_init_debugfs()
356 			    &psu->debugfs_entries[MAX20730_DEBUGFS_OC_PROTECT_MODE],  in max20730_init_debugfs()
359 			    &psu->debugfs_entries[MAX20730_DEBUGFS_SS_TIMING],  in max20730_init_debugfs()
362 			    &psu->debugfs_entries[MAX20730_DEBUGFS_IMAX],  in max20730_init_debugfs()
365 			    &psu->debugfs_entries[MAX20730_DEBUGFS_OPERATION],  in max20730_init_debugfs()
368 			    &psu->debugfs_entries[MAX20730_DEBUGFS_ON_OFF_CONFIG],  in max20730_init_debugfs()
371 			    &psu->debugfs_entries[MAX20730_DEBUGFS_SMBALERT_MASK],  in max20730_init_debugfs()
374 			    &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MODE],  in max20730_init_debugfs()
377 			    &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_COMMAND],  in max20730_init_debugfs()
380 			    &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MAX],  in max20730_init_debugfs()
404 	int R = info->R[class] - 3;	/* take milli-units into account */  in val_to_direct()
405 	int b = info->b[class] * 1000;  in val_to_direct()
408 	d = v * info->m[class] + b;  in val_to_direct()
423 	int R = info->R[class] - 3;  in direct_to_val()
424 	int b = info->b[class] * 1000;  in direct_to_val()
425 	int m = info->m[class];  in direct_to_val()
435 	d = (d - b) / m;  in direct_to_val()
456 		switch ((data->mfr_devset1 >> 11) & 0x3) {  in max20730_read_word_data()
464 			ret = -ENODATA;  in max20730_read_word_data()
469 		max_c = max_current[data->id][(data->mfr_devset1 >> 5) & 0x3];  in max20730_read_word_data()
474 		if (ret > 0 && data->vout_voltage_divider[0] && data->vout_voltage_divider[1]) {  in max20730_read_word_data()
475 			u64 temp = DIV_ROUND_CLOSEST_ULL((u64)ret * data->vout_voltage_divider[1],  in max20730_read_word_data()
476 							 data->vout_voltage_divider[0]);  in max20730_read_word_data()
481 		ret = -ENODATA;  in max20730_read_word_data()
499 	mutex_lock(&data->lock);  in max20730_write_word_data()
500 	devset1 = data->mfr_devset1;  in max20730_write_word_data()
512 				   max_current[data->id], 4);  in max20730_write_word_data()
516 		ret = -ENODATA;  in max20730_write_word_data()
520 	if (!ret && devset1 != data->mfr_devset1) {  in max20730_write_word_data()
524 			data->mfr_devset1 = devset1;  in max20730_write_word_data()
528 	mutex_unlock(&data->lock);  in max20730_write_word_data()
542 		.R[PSC_TEMPERATURE] = -1,
547 		.R[PSC_VOLTAGE_IN] = -2,
552 		.R[PSC_CURRENT_OUT] = -1,
571 		.R[PSC_TEMPERATURE] = -1,
576 		.R[PSC_VOLTAGE_IN] = -2,
583 		 * at least on the evaulation boards. As a result, any in-driver
591 		.R[PSC_CURRENT_OUT] = -1,
610 		.R[PSC_TEMPERATURE] = -1,
615 		.R[PSC_VOLTAGE_IN] = -2,
620 		.R[PSC_CURRENT_OUT] = -1,
639 		.R[PSC_TEMPERATURE] = -1,
644 		.R[PSC_VOLTAGE_IN] = -2,
649 		.R[PSC_CURRENT_OUT] = -1,
663 	struct device *dev = &client->dev;  in max20730_probe()
669 	if (!i2c_check_functionality(client->adapter,  in max20730_probe()
673 		return -ENODEV;  in max20730_probe()
677 		dev_err(&client->dev, "Failed to read Manufacturer ID\n");  in max20730_probe()
682 		dev_err(dev, "Unsupported Manufacturer ID '%s'\n", buf);  in max20730_probe()
683 		return -ENODEV;  in max20730_probe()
698 		dev_err(dev, "Failed to read Manufacturer Model\n");  in max20730_probe()
703 		dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);  in max20730_probe()
704 		return -ENODEV;  in max20730_probe()
709 		dev_err(dev, "Failed to read Manufacturer Revision\n");  in max20730_probe()
714 		dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);  in max20730_probe()
715 		return -ENODEV;  in max20730_probe()
718 	if (client->dev.of_node)  in max20730_probe()
721 		chip_id = i2c_match_id(max20730_id, client)->driver_data;  in max20730_probe()
725 		return -ENOMEM;  in max20730_probe()
726 	data->id = chip_id;  in max20730_probe()
727 	mutex_init(&data->lock);  in max20730_probe()
728 	memcpy(&data->info, &max20730_info[chip_id], sizeof(data->info));  in max20730_probe()
729 	if (of_property_read_u32_array(client->dev.of_node, "vout-voltage-divider",  in max20730_probe()
730 				       data->vout_voltage_divider,  in max20730_probe()
731 				       ARRAY_SIZE(data->vout_voltage_divider)) != 0)  in max20730_probe()
732 		memset(data->vout_voltage_divider, 0, sizeof(data->vout_voltage_divider));  in max20730_probe()
733 	if (data->vout_voltage_divider[1] < data->vout_voltage_divider[0]) {  in max20730_probe()
736 		return -EINVAL;  in max20730_probe()
742 	data->mfr_devset1 = ret;  in max20730_probe()
744 	ret = pmbus_do_probe(client, &data->info);  in max20730_probe()
787 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");