1 // SPDX-License-Identifier: GPL-2.0-only
20  *  0x50 ... read-only EEPROM with calibration data
21  *  0x77 ... read-write ADC for pressure and temperature
85 	ret = i2c_smbus_write_byte_data(priv->client, HP03_ADC_WRITE_REG, reg);  in hp03_get_temp_pressure()
91 	return i2c_smbus_read_word_data(priv->client, HP03_ADC_READ_REG);  in hp03_get_temp_pressure()
96 	struct device *dev = &priv->client->dev;  in hp03_update_temp_pressure()
99 	int ab_val, d1_val, d2_val, diff_val, dut, off, sens, x;  in hp03_update_temp_pressure()  local
103 	ret = regmap_bulk_read(priv->eeprom_regmap, HP03_EEPROM_CX_OFFSET,  in hp03_update_temp_pressure()
112 	gpiod_set_value_cansleep(priv->xclr_gpio, 1);  in hp03_update_temp_pressure()
128 	gpiod_set_value_cansleep(priv->xclr_gpio, 0);  in hp03_update_temp_pressure()
138 		ab_val = coefs[14];	/* A-value */  in hp03_update_temp_pressure()
140 		ab_val = coefs[15];	/* B-value */  in hp03_update_temp_pressure()
142 	diff_val = d2_val - cx_val[4];  in hp03_update_temp_pressure()
144 	dut = diff_val - dut;  in hp03_update_temp_pressure()
146 	off = (cx_val[1] + (((cx_val[3] - 1024) * dut) >> 14)) * 4;  in hp03_update_temp_pressure()
147 	sens = cx_val[0] + ((cx_val[2] * dut) >> 10);  in hp03_update_temp_pressure()
148 	x = ((sens * (d1_val - 7168)) >> 14) - off;  in hp03_update_temp_pressure()
150 	priv->pressure = ((x * 100) >> 5) + (cx_val[6] * 10);  in hp03_update_temp_pressure()
151 	priv->temp = 250 + ((dut * cx_val[5]) >> 16) - (dut >> coefs[17]);  in hp03_update_temp_pressure()
156 	gpiod_set_value_cansleep(priv->xclr_gpio, 0);  in hp03_update_temp_pressure()
167 	mutex_lock(&priv->lock);  in hp03_read_raw()
169 	mutex_unlock(&priv->lock);  in hp03_read_raw()
176 		switch (chan->type) {  in hp03_read_raw()
178 			*val = priv->pressure;  in hp03_read_raw()
181 			*val = priv->temp;  in hp03_read_raw()
184 			return -EINVAL;  in hp03_read_raw()
188 		switch (chan->type) {  in hp03_read_raw()
197 			return -EINVAL;  in hp03_read_raw()
201 		return -EINVAL;  in hp03_read_raw()
204 	return -EINVAL;  in hp03_read_raw()
214 	struct device *dev = &client->dev;  in hp03_probe()
221 		return -ENOMEM;  in hp03_probe()
224 	priv->client = client;  in hp03_probe()
225 	mutex_init(&priv->lock);  in hp03_probe()
227 	indio_dev->name = id->name;  in hp03_probe()
228 	indio_dev->channels = hp03_channels;  in hp03_probe()
229 	indio_dev->num_channels = ARRAY_SIZE(hp03_channels);  in hp03_probe()
230 	indio_dev->info = &hp03_info;  in hp03_probe()
231 	indio_dev->modes = INDIO_DIRECT_MODE;  in hp03_probe()
233 	priv->xclr_gpio = devm_gpiod_get_index(dev, "xclr", 0, GPIOD_OUT_HIGH);  in hp03_probe()
234 	if (IS_ERR(priv->xclr_gpio)) {  in hp03_probe()
236 		ret = PTR_ERR(priv->xclr_gpio);  in hp03_probe()
241 	 * Allocate another device for the on-sensor EEPROM,  in hp03_probe()
245 	priv->eeprom_client = devm_i2c_new_dummy_device(dev, client->adapter,  in hp03_probe()
247 	if (IS_ERR(priv->eeprom_client)) {  in hp03_probe()
249 		return PTR_ERR(priv->eeprom_client);  in hp03_probe()
252 	priv->eeprom_regmap = devm_regmap_init_i2c(priv->eeprom_client,  in hp03_probe()
254 	if (IS_ERR(priv->eeprom_regmap)) {  in hp03_probe()
256 		return PTR_ERR(priv->eeprom_regmap);  in hp03_probe()