1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3  * LTC2992 - Dual Wide Range Power Monitor
62 #define LTC2992_POWER(x)		(LTC2992_POWER1 + ((x) * 0x32))
63 #define LTC2992_POWER_MAX(x)		(LTC2992_POWER1_MAX + ((x) * 0x32))
64 #define LTC2992_POWER_MIN(x)		(LTC2992_POWER1_MIN + ((x) * 0x32))
65 #define LTC2992_POWER_MAX_THRESH(x)	(LTC2992_POWER1_MAX_THRESH + ((x) * 0x32))
66 #define LTC2992_POWER_MIN_THRESH(x)	(LTC2992_POWER1_MIN_THRESH + ((x) * 0x32))
67 #define LTC2992_DSENSE(x)		(LTC2992_DSENSE1 + ((x) * 0x32))
68 #define LTC2992_DSENSE_MAX(x)		(LTC2992_DSENSE1_MAX + ((x) * 0x32))
69 #define LTC2992_DSENSE_MIN(x)		(LTC2992_DSENSE1_MIN + ((x) * 0x32))
70 #define LTC2992_DSENSE_MAX_THRESH(x)	(LTC2992_DSENSE1_MAX_THRESH + ((x) * 0x32))
71 #define LTC2992_DSENSE_MIN_THRESH(x)	(LTC2992_DSENSE1_MIN_THRESH + ((x) * 0x32))
72 #define LTC2992_SENSE(x)		(LTC2992_SENSE1 + ((x) * 0x32))
73 #define LTC2992_SENSE_MAX(x)		(LTC2992_SENSE1_MAX + ((x) * 0x32))
74 #define LTC2992_SENSE_MIN(x)		(LTC2992_SENSE1_MIN + ((x) * 0x32))
75 #define LTC2992_SENSE_MAX_THRESH(x)	(LTC2992_SENSE1_MAX_THRESH + ((x) * 0x32))
76 #define LTC2992_SENSE_MIN_THRESH(x)	(LTC2992_SENSE1_MIN_THRESH + ((x) * 0x32))
77 #define LTC2992_POWER_FAULT(x)		(LTC2992_FAULT1 + ((x) * 0x32))
78 #define LTC2992_SENSE_FAULT(x)		(LTC2992_FAULT1 + ((x) * 0x32))
79 #define LTC2992_DSENSE_FAULT(x)		(LTC2992_FAULT1 + ((x) * 0x32))
82 #define LTC2992_RESET_HISTORY		BIT(3)
85 #define LTC2992_POWER_FAULT_MSK(x)	(BIT(6) << (x))
86 #define LTC2992_DSENSE_FAULT_MSK(x)	(BIT(4) << (x))
87 #define LTC2992_SENSE_FAULT_MSK(x)	(BIT(2) << (x))
90 #define LTC2992_GPIO1_FAULT_MSK(x)	(BIT(0) << (x))
93 #define LTC2992_GPIO2_FAULT_MSK(x)	(BIT(0) << (x))
96 #define LTC2992_GPIO3_FAULT_MSK(x)	(BIT(6) << (x))
97 #define LTC2992_GPIO4_FAULT_MSK(x)	(BIT(4) << (x))
108 #define LTC2992_GPIO_BIT(x)	(LTC2992_GPIO_NR - (x) - 1)
116 	u32				r_sense_uohm[2];
194 	ret = regmap_bulk_read(st->regmap, addr, regvals, reg_len);  in ltc2992_read_reg()
200 		val |= regvals[reg_len - i - 1] << (i * 8);  in ltc2992_read_reg()
211 		regvals[reg_len - i - 1] = (val >> (i * 8)) & 0xFF;  in ltc2992_write_reg()
213 	return regmap_bulk_write(st->regmap, addr, regvals, reg_len);  in ltc2992_write_reg()
222 	mutex_lock(&st->gpio_mutex);  in ltc2992_gpio_get()
224 	mutex_unlock(&st->gpio_mutex);  in ltc2992_gpio_get()
242 	mutex_lock(&st->gpio_mutex);  in ltc2992_gpio_get_multiple()
244 	mutex_unlock(&st->gpio_mutex);  in ltc2992_gpio_get_multiple()
265 	mutex_lock(&st->gpio_mutex);  in ltc2992_gpio_set()
268 		mutex_unlock(&st->gpio_mutex);  in ltc2992_gpio_set()
276 	mutex_unlock(&st->gpio_mutex);  in ltc2992_gpio_set()
295 	mutex_lock(&st->gpio_mutex);  in ltc2992_gpio_set_multiple()
298 	mutex_unlock(&st->gpio_mutex);  in ltc2992_gpio_set_multiple()
303 	const char *name = dev_name(&st->client->dev);  in ltc2992_config_gpio()
312 	mutex_init(&st->gpio_mutex);  in ltc2992_config_gpio()
314 	for (i = 0; i < ARRAY_SIZE(st->gpio_names); i++) {  in ltc2992_config_gpio()
315 		gpio_name = devm_kasprintf(&st->client->dev, GFP_KERNEL, "ltc2992-%x-%s",  in ltc2992_config_gpio()
316 					   st->client->addr, ltc2992_gpio_names[i]);  in ltc2992_config_gpio()
318 			return -ENOMEM;  in ltc2992_config_gpio()
320 		st->gpio_names[i] = gpio_name;  in ltc2992_config_gpio()
323 	st->gc.label = name;  in ltc2992_config_gpio()
324 	st->gc.parent = &st->client->dev;  in ltc2992_config_gpio()
325 	st->gc.owner = THIS_MODULE;  in ltc2992_config_gpio()
326 	st->gc.can_sleep = true;  in ltc2992_config_gpio()
327 	st->gc.base = -1;  in ltc2992_config_gpio()
328 	st->gc.names = st->gpio_names;  in ltc2992_config_gpio()
329 	st->gc.ngpio = ARRAY_SIZE(st->gpio_names);  in ltc2992_config_gpio()
330 	st->gc.get = ltc2992_gpio_get;  in ltc2992_config_gpio()
331 	st->gc.get_multiple = ltc2992_gpio_get_multiple;  in ltc2992_config_gpio()
332 	st->gc.set = ltc2992_gpio_set;  in ltc2992_config_gpio()
333 	st->gc.set_multiple = ltc2992_gpio_set_multiple;  in ltc2992_config_gpio()
335 	ret = devm_gpiochip_add_data(&st->client->dev, &st->gc, st);  in ltc2992_config_gpio()
337 		dev_err(&st->client->dev, "GPIO registering failed (%d)\n", ret);  in ltc2992_config_gpio()
374 			if (st->r_sense_uohm[channel])  in ltc2992_is_visible()
379 			if (st->r_sense_uohm[channel])  in ltc2992_is_visible()
391 			if (st->r_sense_uohm[channel])  in ltc2992_is_visible()
396 			if (st->r_sense_uohm[channel])  in ltc2992_is_visible()
412 	reg_val = ltc2992_read_reg(st, reg, 2);  in ltc2992_get_voltage()
427 	return ltc2992_write_reg(st, reg, 2, val);  in ltc2992_set_voltage()
475 		return -EOPNOTSUPP;  in ltc2992_read_gpios_in()
507 		return ltc2992_read_gpios_in(dev, attr, channel - 2, val);  in ltc2992_read_in()
529 		return -EOPNOTSUPP;  in ltc2992_read_in()
539 	reg_val = ltc2992_read_reg(st, reg, 2);  in ltc2992_get_current()
544 	*val = DIV_ROUND_CLOSEST(reg_val * LTC2992_IADC_NANOV_LSB, st->r_sense_uohm[channel]);  in ltc2992_get_current()
553 	reg_val = DIV_ROUND_CLOSEST(val * st->r_sense_uohm[channel], LTC2992_IADC_NANOV_LSB);  in ltc2992_set_current()
556 	return ltc2992_write_reg(st, reg, 2, reg_val);  in ltc2992_set_current()
604 		return -EOPNOTSUPP;  in ltc2992_read_curr()
619 			       st->r_sense_uohm[channel] * 1000);  in ltc2992_get_power()
628 	reg_val = mul_u64_u32_div(val, st->r_sense_uohm[channel] * 1000,  in ltc2992_set_power()
679 		return -EOPNOTSUPP;  in ltc2992_read_power()
696 		return -EOPNOTSUPP;  in ltc2992_read()
713 		return -EOPNOTSUPP;  in ltc2992_write_curr()
732 		return -EOPNOTSUPP;  in ltc2992_write_gpios_in()
744 		return ltc2992_write_gpios_in(dev, attr, channel - 2, val);  in ltc2992_write_in()
754 		return -EOPNOTSUPP;  in ltc2992_write_in()
773 		return -EOPNOTSUPP;  in ltc2992_write_power()
785 		return regmap_update_bits(st->regmap, LTC2992_CTRLB, LTC2992_RESET_HISTORY,  in ltc2992_write_chip()
788 		return -EOPNOTSUPP;  in ltc2992_write_chip()
805 		return -EOPNOTSUPP;  in ltc2992_write()
861 	device_for_each_child_node_scoped(&st->client->dev, child) {  in ltc2992_parse_dt()
867 			return -EINVAL;  in ltc2992_parse_dt()
869 		ret = fwnode_property_read_u32(child, "shunt-resistor-micro-ohms", &val);  in ltc2992_parse_dt()
872 				return dev_err_probe(&st->client->dev, -EINVAL,  in ltc2992_parse_dt()
875 			st->r_sense_uohm[addr] = val;  in ltc2992_parse_dt()
888 	st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);  in ltc2992_i2c_probe()
890 		return -ENOMEM;  in ltc2992_i2c_probe()
892 	st->client = client;  in ltc2992_i2c_probe()
893 	st->regmap = devm_regmap_init_i2c(client, &ltc2992_regmap_config);  in ltc2992_i2c_probe()
894 	if (IS_ERR(st->regmap))  in ltc2992_i2c_probe()
895 		return PTR_ERR(st->regmap);  in ltc2992_i2c_probe()
905 	hwmon_dev = devm_hwmon_device_register_with_info(&client->dev, client->name, st,  in ltc2992_i2c_probe()