1 // SPDX-License-Identifier: GPL-2.0+
17 	int max = ll_entry_count(struct i2c_adapter, i2c);  in i2c_get_adapter()  local
20 	if (index >= max) {  in i2c_get_adapter()
21 		printf("Error, wrong i2c adapter %d max %d possible\n",  in i2c_get_adapter()
22 		       index, max);  in i2c_get_adapter()
44  * -------------
64 	/* channel < 0 - turn off the mux */  in i2c_mux_set()
67 		ret = adap->write(adap, chip, 0, 0, &buf, 1);  in i2c_mux_set()
77 			return -1;  in i2c_mux_set()
82 			return -1;  in i2c_mux_set()
87 			return -1;  in i2c_mux_set()
92 			return -1;  in i2c_mux_set()
97 		return -1;  in i2c_mux_set()
100 	ret = adap->write(adap, chip, 0, 0, &buf, 1);  in i2c_mux_set()
113 	if (i2c_bus_tmp->next_hop[0].chip != 0) {  in i2c_mux_set_all()
118 			if (i2c_bus_tmp->next_hop[i].chip == 0)  in i2c_mux_set_all()
122 					i2c_bus_tmp->next_hop[i].mux.id,  in i2c_mux_set_all()
123 					i2c_bus_tmp->next_hop[i].chip,  in i2c_mux_set_all()
124 					i2c_bus_tmp->next_hop[i].channel);  in i2c_mux_set_all()
138 	if (I2C_ADAP->init_done == 0)  in i2c_mux_disconnect_all()
142 	if ((i2c_bus_tmp->next_hop[0].chip != 0) &&  in i2c_mux_disconnect_all()
143 	    (I2C_ADAP->init_done != 0)) {  in i2c_mux_disconnect_all()
149 			chip = i2c_bus_tmp->next_hop[--i].chip;  in i2c_mux_disconnect_all()
153 			ret = I2C_ADAP->write(I2C_ADAP, chip, 0, 0, &buf, 1);  in i2c_mux_disconnect_all()
167  * ---------------
172 static void i2c_init_bus(unsigned int bus_no, int speed, int slaveaddr)  in i2c_init_bus()  argument
177 	I2C_ADAP->init(I2C_ADAP, speed, slaveaddr);  in i2c_init_bus()
179 	if (gd->flags & GD_FLG_RELOC) {  in i2c_init_bus()
180 		I2C_ADAP->init_done = 1;  in i2c_init_bus()
181 		I2C_ADAP->speed = speed;  in i2c_init_bus()
182 		I2C_ADAP->slaveaddr = slaveaddr;  in i2c_init_bus()
202  * data, including speed and slaveaddr.
213  * ------------------
215  *  Returns index of currently active I2C bus.  Zero-based.
219 	return gd->cur_i2c_bus;  in i2c_get_bus_num()
224  * ------------------
232  *	bus - bus index, zero based
238 	int max;  in i2c_set_bus_num()  local
240 	if ((bus == I2C_BUS) && (I2C_ADAP->init_done > 0))  in i2c_set_bus_num()
245 		return -1;  in i2c_set_bus_num()
248 	max = ll_entry_count(struct i2c_adapter, i2c);  in i2c_set_bus_num()
249 	if (I2C_ADAPTER(bus) >= max) {  in i2c_set_bus_num()
250 		printf("Error, wrong i2c adapter %d max %d possible\n",  in i2c_set_bus_num()
251 		       I2C_ADAPTER(bus), max);  in i2c_set_bus_num()
252 		return -2;  in i2c_set_bus_num()
259 	gd->cur_i2c_bus = bus;  in i2c_set_bus_num()
260 	if (I2C_ADAP->init_done == 0)  in i2c_set_bus_num()
261 		i2c_init_bus(bus, I2C_ADAP->speed, I2C_ADAP->slaveaddr);  in i2c_set_bus_num()
275 	return I2C_ADAP->probe(I2C_ADAP, chip);  in i2c_probe()
293 	return I2C_ADAP->read(I2C_ADAP, chip, addr, alen, buffer, len);  in i2c_read()
299 	return I2C_ADAP->write(I2C_ADAP, chip, addr, alen, buffer, len);  in i2c_write()
302 unsigned int i2c_set_bus_speed(unsigned int speed)  in i2c_set_bus_speed()  argument
306 	if (I2C_ADAP->set_bus_speed == NULL)  in i2c_set_bus_speed()
308 	ret = I2C_ADAP->set_bus_speed(I2C_ADAP, speed);  in i2c_set_bus_speed()
309 	if (gd->flags & GD_FLG_RELOC)  in i2c_set_bus_speed()
310 		I2C_ADAP->speed = (ret == 0) ? speed : 0;  in i2c_set_bus_speed()
318 	return cur->speed;  in i2c_get_bus_speed()
345 __weak void i2c_init(int speed, int slaveaddr)  in i2c_init()  argument
347 	i2c_init_bus(i2c_get_bus_num(), speed, slaveaddr);  in i2c_init()