1 // SPDX-License-Identifier: GPL-2.0-or-later
17 #include <linux/delay.h>
53 static ushort delay = ZL6100_WAIT_TIME;  variable
54 module_param(delay, ushort, 0644);
55 MODULE_PARM_DESC(delay, "Delay between chip accesses in uS");
57 /* Convert linear sensor value to milli-units */
69 	/* scale result to milli-units */  in zl6100_l2d()
75 		val >>= -exponent;  in zl6100_l2d()
94 		val = -val;  in zl6100_d2l()
103 	while (val < MIN_MANTISSA && exponent > -15) {  in zl6100_d2l()
104 		exponent--;  in zl6100_d2l()
108 	/* Convert mantissa from milli-units to units */  in zl6100_d2l()
117 		mantissa = -mantissa;  in zl6100_d2l()
123 static int zl6100_read_word_data(struct i2c_client *client, int page,  in zl6100_read_word_data()  argument
130 	if (page >= info->pages)  in zl6100_read_word_data()
131 		return -ENXIO;  in zl6100_read_word_data()
133 	if (data->id == zl2005) {  in zl6100_read_word_data()
142 			return -ENXIO;  in zl6100_read_word_data()
160 			return -ENXIO;  in zl6100_read_word_data()
165 	ret = pmbus_read_word_data(client, page, phase, vreg);  in zl6100_read_word_data()
181 static int zl6100_read_byte_data(struct i2c_client *client, int page, int reg)  in zl6100_read_byte_data()  argument
186 	if (page >= info->pages)  in zl6100_read_byte_data()
187 		return -ENXIO;  in zl6100_read_byte_data()
208 		ret = pmbus_read_byte_data(client, page, reg);  in zl6100_read_byte_data()
215 static int zl6100_write_word_data(struct i2c_client *client, int page, int reg,  in zl6100_write_word_data()  argument
221 	if (page >= info->pages)  in zl6100_write_word_data()
222 		return -ENXIO;  in zl6100_write_word_data()
245 			return -ENXIO;  in zl6100_write_word_data()
249 	return pmbus_write_word_data(client, page, vreg, word);  in zl6100_write_word_data()
287 	if (!i2c_check_functionality(client->adapter,  in zl6100_probe()
290 		return -ENODEV;  in zl6100_probe()
295 		dev_err(&client->dev, "Failed to read device ID\n");  in zl6100_probe()
299 	dev_info(&client->dev, "Device ID %s\n", device_id);  in zl6100_probe()
302 	for (mid = zl6100_id; mid->name[0]; mid++) {  in zl6100_probe()
303 		if (!strncasecmp(mid->name, device_id, strlen(mid->name)))  in zl6100_probe()
306 	if (!mid->name[0]) {  in zl6100_probe()
307 		dev_err(&client->dev, "Unsupported device\n");  in zl6100_probe()
308 		return -ENODEV;  in zl6100_probe()
310 	if (strcmp(client->name, mid->name) != 0)  in zl6100_probe()
311 		dev_notice(&client->dev,  in zl6100_probe()
313 			   client->name, mid->name);  in zl6100_probe()
315 	data = devm_kzalloc(&client->dev, sizeof(struct zl6100_data),  in zl6100_probe()
318 		return -ENOMEM;  in zl6100_probe()
320 	data->id = mid->driver_data;  in zl6100_probe()
327 	udelay(delay);  in zl6100_probe()
329 	info = &data->info;  in zl6100_probe()
331 	info->pages = 1;  in zl6100_probe()
332 	info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT  in zl6100_probe()
342 	if (data->id == zl2004 || data->id == zl8802 || data->id == zl9101 ||  in zl6100_probe()
343 	    data->id == zl9117 || data->id == zls4009)  in zl6100_probe()
344 		info->func[0] |= PMBUS_HAVE_VMON | PMBUS_HAVE_STATUS_VMON;  in zl6100_probe()
350 	 * shared outputs. If the module is in shared output mode, only one  in zl6100_probe()
353 	if (data->id == zl8802) {  in zl6100_probe()
354 		info->pages = 2;  in zl6100_probe()
355 		info->func[0] |= PMBUS_HAVE_IIN;  in zl6100_probe()
361 		udelay(delay);  in zl6100_probe()
364 			info->func[1] |= PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;  in zl6100_probe()
366 			info->func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT  in zl6100_probe()
374 			udelay(delay);  in zl6100_probe()
381 				info->func[i] |= PMBUS_HAVE_TEMP2;  in zl6100_probe()
383 			udelay(delay);  in zl6100_probe()
390 			info->func[0] |= PMBUS_HAVE_TEMP3;  in zl6100_probe()
397 			info->func[0] |= PMBUS_HAVE_TEMP2;  in zl6100_probe()
400 	udelay(delay);  in zl6100_probe()
402 	info->access_delay = delay;  in zl6100_probe()
403 	info->read_word_data = zl6100_read_word_data;  in zl6100_probe()
404 	info->read_byte_data = zl6100_read_byte_data;  in zl6100_probe()
405 	info->write_word_data = zl6100_write_word_data;  in zl6100_probe()