1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Hardware monitoring driver for MPS Multi-phase Digital VR Controllers
46 		return -ENODATA;  in mp2888_read_byte_data()
57 	 * , bits 0-2. The value is selected as below:  in mp2888_current_sense_gain_and_resolution_get()
58 	 * 00b - 5µA/A, 01b - 8.5µA/A, 10b - 9.7µA/A, 11b - 10µA/A. Other  in mp2888_current_sense_gain_and_resolution_get()
67 		data->curr_sense_gain = 85;  in mp2888_current_sense_gain_and_resolution_get()
70 		data->curr_sense_gain = 97;  in mp2888_current_sense_gain_and_resolution_get()
73 		data->curr_sense_gain = 100;  in mp2888_current_sense_gain_and_resolution_get()
76 		data->curr_sense_gain = 50;  in mp2888_current_sense_gain_and_resolution_get()
79 		return -EINVAL;  in mp2888_current_sense_gain_and_resolution_get()
87 	data->total_curr_resolution = (ret & MP2888_TOTAL_CURRENT_RESOLUTION) >> 3;  in mp2888_current_sense_gain_and_resolution_get()
88 	data->phase_curr_resolution = (ret & MP2888_PHASE_CURRENT_RESOLUTION) >> 4;  in mp2888_current_sense_gain_and_resolution_get()
109 	 * - Kcs is the DrMOS current sense gain of power stage, which is obtained from the  in mp2888_read_phase()
110 	 *   register MP2888_MFR_VR_CONFIG1, bits 13-12 with the following selection of DrMOS  in mp2888_read_phase()
111 	 *   (data->curr_sense_gain):  in mp2888_read_phase()
112 	 *   00b - 8.5µA/A, 01b - 9.7µA/A, 1b - 10µA/A, 11b - 5µA/A.  in mp2888_read_phase()
113 	 * - Rcs is the internal phase current sense resistor. This parameter depends on hardware  in mp2888_read_phase()
114 	 *   assembly. By default it is set to 1kΩ. In case of different assembly, user should  in mp2888_read_phase()
116 	 * If phase current resolution bit is set to 1, READ_CSx value should be doubled.  in mp2888_read_phase()
119 	 * light load.  in mp2888_read_phase()
121 	ret = DIV_ROUND_CLOSEST(ret * 200 - 19600, data->curr_sense_gain);  in mp2888_read_phase()
122 	/* Scale according to total current resolution. */  in mp2888_read_phase()
123 	ret = (data->total_curr_resolution) ? ret * 2 : ret;  in mp2888_read_phase()
149 		return -ENODATA;  in mp2888_read_phases()
167 		 * READ_VIN requires fixup to scale it to linear11 format. Register data format  in mp2888_read_word_data()
179 		 * degrees C - scaling is needed to match both.  in mp2888_read_word_data()
195 		ret = data->total_curr_resolution ? ret * 2 : ret;  in mp2888_read_word_data()
205 		 * Scaling is needed to match both.  in mp2888_read_word_data()
207 		ret = data->total_curr_resolution ? ret * 8 : ret * 4;  in mp2888_read_word_data()
214 		ret = data->total_curr_resolution ? ret : DIV_ROUND_CLOSEST(ret, 2);  in mp2888_read_word_data()
223 		 * is needed to match both.  in mp2888_read_word_data()
225 		ret = data->total_curr_resolution ? ret * 2 : ret;  in mp2888_read_word_data()
228 	 * The below registers are not implemented by device or implemented not according to the  in mp2888_read_word_data()
229 	 * spec. Skip all of them to avoid exposing non-relevant inputs to sysfs.  in mp2888_read_word_data()
255 		return -ENXIO;  in mp2888_read_word_data()
257 		return -ENODATA;  in mp2888_read_word_data()
275 		/* Fix limit according to total curent resolution. */  in mp2888_write_word_data()
276 		word = data->total_curr_resolution ? DIV_ROUND_CLOSEST(word, 8) :  in mp2888_write_word_data()
282 		/* Fix limit according to total curent resolution. */  in mp2888_write_word_data()
283 		word = data->total_curr_resolution ? DIV_ROUND_CLOSEST(word, 4) :  in mp2888_write_word_data()
289 		return -ENODATA;  in mp2888_write_word_data()
304 	/* Identify multiphase number - could be from 1 to 10. */  in mp2888_identify_multiphase()
309 	info->phases[0] = ret & GENMASK(3, 0);  in mp2888_identify_multiphase()
312 	 * The device provides a total of 10 PWM pins, and can be configured to different phase  in mp2888_identify_multiphase()
315 	if (info->phases[0] > MP2888_MAX_PHASE)  in mp2888_identify_multiphase()
316 		return -EINVAL;  in mp2888_identify_multiphase()
360 	data = devm_kzalloc(&client->dev, sizeof(struct mp2888_data), GFP_KERNEL);  in mp2888_probe()
362 		return -ENOMEM;  in mp2888_probe()
364 	memcpy(&data->info, &mp2888_info, sizeof(*info));  in mp2888_probe()
365 	info = &data->info;  in mp2888_probe()