1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2891)
18  * to read input power per rail. The MP2891 does not have standard
30 #define MP2891_IOUT_SCALE_DIV	32
76 		val >>= -exponent;  in mp2891_reg2data_linear11()
99 	 * Obtain vout scale from the register MFR_VOUT_LOOP_CTRL, bits 15-14,bit 13.  in mp2891_identify_vout_scale()
104 	 * 00b - 6.25mV/LSB, 01b - 5mV/LSB, 10b - 2mV/LSB, 11b - 1mV  in mp2891_identify_vout_scale()
107 		data->vout_scale[page] = 250;  in mp2891_identify_vout_scale()
111 			data->vout_scale[page] = 625;  in mp2891_identify_vout_scale()
113 			data->vout_scale[page] = 500;  in mp2891_identify_vout_scale()
115 			data->vout_scale[page] = 200;  in mp2891_identify_vout_scale()
117 			data->vout_scale[page] = 100;  in mp2891_identify_vout_scale()
143 	 * 000b - 1A/LSB, 001b - (1/32)A/LSB, 010b - (1/16)A/LSB,  in mp2891_identify_iout_scale()
144 	 * 011b - (1/8)A/LSB, 100b - (1/4)A/LSB, 101b - (1/2)A/LSB  in mp2891_identify_iout_scale()
145 	 * 110b - 1A/LSB, 111b - 2A/LSB  in mp2891_identify_iout_scale()
150 		data->iout_scale[page] = 32;  in mp2891_identify_iout_scale()
153 		data->iout_scale[page] = 1;  in mp2891_identify_iout_scale()
156 		data->iout_scale[page] = 2;  in mp2891_identify_iout_scale()
159 		data->iout_scale[page] = 4;  in mp2891_identify_iout_scale()
162 		data->iout_scale[page] = 8;  in mp2891_identify_iout_scale()
165 		data->iout_scale[page] = 16;  in mp2891_identify_iout_scale()
168 		data->iout_scale[page] = 64;  in mp2891_identify_iout_scale()
179 	/* Identify vout scale for rail 1. */  in mp2891_identify()
184 	/* Identify vout scale for rail 2. */  in mp2891_identify()
189 	/* Identify iout scale for rail 1. */  in mp2891_identify()
194 	/* Identify iout scale for rail 2. */  in mp2891_identify()
214 		ret = -ENODATA;  in mp2891_read_byte_data()
254 		 * is not used to read the input power per rail. The input power  in mp2891_read_word_data()
255 		 * per rail is read through the vender redefined register  in mp2891_read_word_data()
286 		ret = DIV_ROUND_CLOSEST(ret * data->vout_scale[page], MP2891_VOUT_SCALE_DIV);  in mp2891_read_word_data()
293 		ret = DIV_ROUND_CLOSEST((ret & GENMASK(10, 0)) * data->iout_scale[page],  in mp2891_read_word_data()
306 		ret = (ret & GENMASK(7, 0)) - MP2891_TEMP_LIMIT_OFFSET;  in mp2891_read_word_data()
326 			ret = FIELD_GET(GENMASK(7, 0), ret) * MP2891_UV_LIMIT_SCALE -  in mp2891_read_word_data()
350 		ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) * data->iout_scale[page] *  in mp2891_read_word_data()
380 		ret = -ENODATA;  in mp2891_read_word_data()
383 		ret = -EINVAL;  in mp2891_read_word_data()
401 							      data->vout_scale[page]));  in mp2891_write_word_data()
405 		 * The PMBUS_VOUT_UV_FAULT_LIMIT[7:0] is the limit value, and bit8-bit15  in mp2891_write_word_data()
429 		 * The PMBUS_VOUT_OV_FAULT_LIMIT[7:0] is the limit value, and bit8-bit15  in mp2891_write_word_data()
440 								   DIV_ROUND_CLOSEST(word -  in mp2891_write_word_data()
453 		 * The PMBUS_VIN_OV_FAULT_LIMIT[7:0] is the limit value, and bit8-bit15  in mp2891_write_word_data()
471 		 * have 40°C offset. The bit0-bit7 is the limit value, and bit8-bit15  in mp2891_write_word_data()
487 								  data->iout_scale[page]));  in mp2891_write_word_data()
508 		ret = -ENODATA;  in mp2891_write_word_data()
511 		ret = -EINVAL;  in mp2891_write_word_data()
528 	.m[PSC_VOLTAGE_IN] = 32,
565 	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);  in mp2891_probe()
567 		return -ENOMEM;  in mp2891_probe()
569 	memcpy(&data->info, &mp2891_info, sizeof(mp2891_info));  in mp2891_probe()
571 	return pmbus_do_probe(client, &data->info);  in mp2891_probe()