1 // SPDX-License-Identifier: GPL-2.0-or-later
79 	bool negative = false;  in val2linear11()  local
85 		negative = true;  in val2linear11()
86 		val = -val;  in val2linear11()
95 	while (val < MIN_LIN_MANTISSA && exponent > -15) {  in val2linear11()
96 		exponent--;  in val2linear11()
100 	/* Convert mantissa from milli-units to units */  in val2linear11()
104 	if (negative)  in val2linear11()
105 		mantissa = -mantissa;  in val2linear11()
112 mp2856_read_word_helper(struct i2c_client *client, int page, int phase, u8 reg,  in mp2856_read_word_helper()  argument
115 	int ret = pmbus_read_word_data(client, page, phase, reg);  in mp2856_read_word_helper()
122 		 int phase, u8 reg)  in mp2856_read_vout()  argument
126 	ret = mp2856_read_word_helper(client, page, phase, reg,  in mp2856_read_vout()
132 	ret = (data->vout_format[page] == vid) ?  in mp2856_read_vout()
140 		  int page, int phase, u8 reg)  in mp2856_read_phase()  argument
145 	ret = pmbus_read_word_data(client, page, phase, reg);  in mp2856_read_phase()
149 	if (!((phase + 1) % MP2856_PAGE_NUM))  in mp2856_read_phase()
154 	 * Output value is calculated as: (READ_CSx * 12.5mV - 1.23V) / (Kcs * Rcs)  in mp2856_read_phase()
156 	val = (ret * 125) - 12300;  in mp2856_read_phase()
163 		   int page, int phase)  in mp2856_read_phases()  argument
168 		switch (phase) {  in mp2856_read_phases()
170 			ret = mp2856_read_phase(client, data, page, phase,  in mp2856_read_phases()
174 			ret = mp2856_read_phase(client, data, page, phase,  in mp2856_read_phases()
178 			ret = mp2856_read_phase(client, data, page, phase,  in mp2856_read_phases()
182 			ret = mp2856_read_phase(client, data, page, phase,  in mp2856_read_phases()
186 			return -ENODATA;  in mp2856_read_phases()
189 		switch (phase) {  in mp2856_read_phases()
191 			ret = mp2856_read_phase(client, data, page, phase,  in mp2856_read_phases()
195 			ret = mp2856_read_phase(client, data, page, phase,  in mp2856_read_phases()
199 			return -ENODATA;  in mp2856_read_phases()
207 		      int phase, int reg)  in mp2856_read_word_data()  argument
215 		ret = mp2856_read_vout(client, data, page, phase, reg);  in mp2856_read_word_data()
218 		if (phase != 0xff)  in mp2856_read_word_data()
219 			ret = mp2856_read_phases(client, data, page, phase);  in mp2856_read_word_data()
221 			ret = pmbus_read_word_data(client, page, phase, reg);  in mp2856_read_word_data()
224 		return -ENODATA;  in mp2856_read_word_data()
238 		return -ENODATA;  in mp2856_read_byte_data()
271 	data->info.phases[0] = (ret > data->max_phases[0]) ?  in mp2856_identify_multiphase_rail1()
272 				data->max_phases[0] : ret;  in mp2856_identify_multiphase_rail1()
274 	for (i = 0 ; i < data->info.phases[0]; i++)  in mp2856_identify_multiphase_rail1()
275 		data->info.pfunc[i] |= PMBUS_HAVE_IOUT;  in mp2856_identify_multiphase_rail1()
291 	data->info.phases[1] = (ret > data->max_phases[1]) ?  in mp2856_identify_multiphase_rail2()
292 				data->max_phases[1] : ret;  in mp2856_identify_multiphase_rail2()
294 	for (i = 0 ; i < data->info.phases[0]; i++)  in mp2856_identify_multiphase_rail2()
295 		data->info.pfunc[i] |= PMBUS_HAVE_IOUT;  in mp2856_identify_multiphase_rail2()
308 	 * MP2856_MFR_VR_CONFIG1, bits 13-12. The value is selected as below:  in mp2856_current_sense_gain_get()
309 	 * 00b - 5µA/A, 01b - 8.5µA/A, 10b - 9.7µA/A, 11b - 10µA/A. Other  in mp2856_current_sense_gain_get()
312 	for (i = 0 ; i < data->info.pages; i++) {  in mp2856_current_sense_gain_get()
323 			data->curr_sense_gain[i] = 50;  in mp2856_current_sense_gain_get()
326 			data->curr_sense_gain[i] = 85;  in mp2856_current_sense_gain_get()
329 			data->curr_sense_gain[i] = 97;  in mp2856_current_sense_gain_get()
332 			data->curr_sense_gain[i] = 100;  in mp2856_current_sense_gain_get()
345 	for (i = 0; i < data->info.pages; i++) {  in mp2856_identify_vout_format()
354 		data->vout_format[i] = (ret & MP2856_VOUT_MODE) ? linear : vid;  in mp2856_identify_vout_format()
402 	data = devm_kzalloc(&client->dev, sizeof(struct mp2856_data),  in mp2856_probe()
405 		return -ENOMEM;  in mp2856_probe()
409 	memcpy(data->max_phases, mp2856_max_phases[chip_id],  in mp2856_probe()
410 	       sizeof(data->max_phases));  in mp2856_probe()
412 	memcpy(&data->info, &mp2856_info, sizeof(*info));  in mp2856_probe()
413 	info = &data->info;  in mp2856_probe()
426 		info->pages = 1;  in mp2856_probe()