1 // SPDX-License-Identifier: GPL-2.0-only
29 	int			nr;  member
60 	/* TODO: Add the resulting partition to the device-tree */  in smu_sat_get_sdb_partition()
65 	err = i2c_smbus_write_word_data(sat->i2c, 8, id << 8);  in smu_sat_get_sdb_partition()
71 	err = i2c_smbus_read_word_data(sat->i2c, 9);  in smu_sat_get_sdb_partition()
89 		err = i2c_smbus_read_i2c_block_data(sat->i2c, 0xa, 4, data);  in smu_sat_get_sdb_partition()
119 	err = i2c_smbus_read_i2c_block_data(sat->i2c, 0x3f, 16, sat->cache);  in wf_sat_read_cache()
122 	sat->last_read = jiffies;  in wf_sat_read_cache()
129 			       16, 1, sat->cache, 16, false);  in wf_sat_read_cache()
138 	struct wf_sat *sat = sens->sat;  in wf_sat_sensor_get()
142 	if (sat->i2c == NULL)  in wf_sat_sensor_get()
143 		return -ENODEV;  in wf_sat_sensor_get()
145 	mutex_lock(&sat->mutex);  in wf_sat_sensor_get()
146 	if (time_after(jiffies, (sat->last_read + MAX_AGE))) {  in wf_sat_sensor_get()
152 	i = sens->index * 2;  in wf_sat_sensor_get()
153 	val = ((sat->cache[i] << 8) + sat->cache[i+1]) << sens->shift;  in wf_sat_sensor_get()
154 	if (sens->index2 >= 0) {  in wf_sat_sensor_get()
155 		i = sens->index2 * 2;  in wf_sat_sensor_get()
156 		/* 4.12 * 8.8 -> 12.20; shift right 4 to get 16.16 */  in wf_sat_sensor_get()
157 		val = (val * ((sat->cache[i] << 8) + sat->cache[i+1])) >> 4;  in wf_sat_sensor_get()
164 	mutex_unlock(&sat->mutex);  in wf_sat_sensor_get()
172 	if (sat->nr >= 0)  in wf_sat_release()
173 		sats[sat->nr] = NULL;  in wf_sat_release()
180 	struct wf_sat *sat = sens->sat;  in wf_sat_sensor_release()
183 	kref_put(&sat->ref, wf_sat_release);  in wf_sat_sensor_release()
195 	struct device_node *dev = client->dev.of_node;  in wf_sat_probe()
202 	int shift, cpu, index;  in wf_sat_probe()  local
208 		return -ENOMEM;  in wf_sat_probe()
209 	sat->nr = -1;  in wf_sat_probe()
210 	sat->node = of_node_get(dev);  in wf_sat_probe()
211 	kref_init(&sat->ref);  in wf_sat_probe()
212 	mutex_init(&sat->mutex);  in wf_sat_probe()
213 	sat->i2c = client;  in wf_sat_probe()
214 	INIT_LIST_HEAD(&sat->sensors);  in wf_sat_probe()
217 	vsens[0] = vsens[1] = -1;  in wf_sat_probe()
218 	isens[0] = isens[1] = -1;  in wf_sat_probe()
228 		index = *reg - 0x30;  in wf_sat_probe()
230 		/* expect location to be CPU [AB][01] ... */  in wf_sat_probe()
231 		if (strncmp(loc, "CPU ", 4) != 0)  in wf_sat_probe()
233 		chip = loc[4] - 'A';  in wf_sat_probe()
234 		core = loc[5] - '0';  in wf_sat_probe()
240 		cpu = 2 * chip + core;  in wf_sat_probe()
241 		if (sat->nr < 0)  in wf_sat_probe()
242 			sat->nr = chip;  in wf_sat_probe()
243 		else if (sat->nr != chip) {  in wf_sat_probe()
245 			       "multiple CPU chips on one SAT (%s)\n", loc);  in wf_sat_probe()
249 		if (of_node_is_type(child, "voltage-sensor")) {  in wf_sat_probe()
250 			name = "cpu-voltage";  in wf_sat_probe()
253 		} else if (of_node_is_type(child, "current-sensor")) {  in wf_sat_probe()
254 			name = "cpu-current";  in wf_sat_probe()
257 		} else if (of_node_is_type(child, "temp-sensor")) {  in wf_sat_probe()
258 			name = "cpu-temp";  in wf_sat_probe()
263 		/* the +16 is enough for "cpu-voltage-n" */  in wf_sat_probe()
267 			       "%s sensor %d (no memory)\n", name, cpu);  in wf_sat_probe()
270 		sens->index = index;  in wf_sat_probe()
271 		sens->index2 = -1;  in wf_sat_probe()
272 		sens->shift = shift;  in wf_sat_probe()
273 		sens->sat = sat;  in wf_sat_probe()
274 		sens->sens.ops = &wf_sat_ops;  in wf_sat_probe()
275 		sens->sens.name = (char *) (sens + 1);  in wf_sat_probe()
276 		snprintf((char *)sens->sens.name, 16, "%s-%d", name, cpu);  in wf_sat_probe()
278 		if (wf_register_sensor(&sens->sens))  in wf_sat_probe()
281 			list_add(&sens->link, &sat->sensors);  in wf_sat_probe()
282 			kref_get(&sat->ref);  in wf_sat_probe()
290 		cpu = 2 * sat->nr + core;  in wf_sat_probe()
294 			       "sensor %d (no memory)\n", cpu);  in wf_sat_probe()
297 		sens->index = vsens[core];  in wf_sat_probe()
298 		sens->index2 = isens[core];  in wf_sat_probe()
299 		sens->shift = 0;  in wf_sat_probe()
300 		sens->sat = sat;  in wf_sat_probe()
301 		sens->sens.ops = &wf_sat_ops;  in wf_sat_probe()
302 		sens->sens.name = (char *) (sens + 1);  in wf_sat_probe()
303 		snprintf((char *)sens->sens.name, 16, "cpu-power-%d", cpu);  in wf_sat_probe()
305 		if (wf_register_sensor(&sens->sens))  in wf_sat_probe()
308 			list_add(&sens->link, &sat->sensors);  in wf_sat_probe()
309 			kref_get(&sat->ref);  in wf_sat_probe()
313 	if (sat->nr >= 0)  in wf_sat_probe()
314 		sats[sat->nr] = sat;  in wf_sat_probe()
325 	while(!list_empty(&sat->sensors)) {  in wf_sat_remove()
326 		sens = list_first_entry(&sat->sensors,  in wf_sat_remove()
328 		list_del(&sens->link);  in wf_sat_remove()
329 		wf_unregister_sensor(&sens->sens);  in wf_sat_remove()
331 	sat->i2c = NULL;  in wf_sat_remove()
332 	kref_put(&sat->ref, wf_sat_release);  in wf_sat_remove()
338 	{ "MAC,smu-sat", 0 },
344 	{ .compatible = "smu-sat", },