133 static int get_scl_gpio_value(struct i2c_adapter *adap)  in get_scl_gpio_value()  argument
135 	return gpiod_get_value_cansleep(adap->bus_recovery_info->scl_gpiod);  in get_scl_gpio_value()
138 static void set_scl_gpio_value(struct i2c_adapter *adap, int val)  in set_scl_gpio_value()  argument
140 	gpiod_set_value_cansleep(adap->bus_recovery_info->scl_gpiod, val);  in set_scl_gpio_value()
143 static int get_sda_gpio_value(struct i2c_adapter *adap)  in get_sda_gpio_value()  argument
145 	return gpiod_get_value_cansleep(adap->bus_recovery_info->sda_gpiod);  in get_sda_gpio_value()
148 static void set_sda_gpio_value(struct i2c_adapter *adap, int val)  in set_sda_gpio_value()  argument
150 	gpiod_set_value_cansleep(adap->bus_recovery_info->sda_gpiod, val);  in set_sda_gpio_value()
153 static int i2c_generic_bus_free(struct i2c_adapter *adap)  in i2c_generic_bus_free()  argument
155 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_bus_free()
159 		ret = bri->get_bus_free(adap);  in i2c_generic_bus_free()
161 		ret = bri->get_sda(adap);  in i2c_generic_bus_free()
177 int i2c_generic_scl_recovery(struct i2c_adapter *adap)  in i2c_generic_scl_recovery()  argument
179 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_scl_recovery()
183 		bri->prepare_recovery(adap);  in i2c_generic_scl_recovery()
191 	bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
194 		bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
203 			if (!bri->get_scl(adap)) {  in i2c_generic_scl_recovery()
204 				dev_err(&adap->dev,  in i2c_generic_scl_recovery()
212 		bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
216 			bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
220 			ret = i2c_generic_bus_free(adap);  in i2c_generic_scl_recovery()
231 		bri->unprepare_recovery(adap);  in i2c_generic_scl_recovery()
237 int i2c_recover_bus(struct i2c_adapter *adap)  in i2c_recover_bus()  argument
239 	if (!adap->bus_recovery_info)  in i2c_recover_bus()
242 	dev_dbg(&adap->dev, "Trying i2c bus recovery\n");  in i2c_recover_bus()
243 	return adap->bus_recovery_info->recover_bus(adap);  in i2c_recover_bus()
247 static void i2c_init_recovery(struct i2c_adapter *adap)  in i2c_init_recovery()  argument
249 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_init_recovery()
286 	dev_err(&adap->dev, "Not using recovery: %s\n", err_str);  in i2c_init_recovery()
287 	adap->bus_recovery_info = NULL;  in i2c_init_recovery()
292 	struct i2c_adapter *adap = client->adapter;  in i2c_smbus_host_notify_to_irq()  local
295 	if (!adap->host_notify_domain)  in i2c_smbus_host_notify_to_irq()
301 	irq = irq_create_mapping(adap->host_notify_domain, client->addr);  in i2c_smbus_host_notify_to_irq()
662 static void i2c_dev_set_name(struct i2c_adapter *adap,  in i2c_dev_set_name()  argument
678 	dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap),  in i2c_dev_set_name()
725 i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info)  in i2c_new_client_device()  argument
734 	client->adapter = adap;  in i2c_new_client_device()
749 		dev_err(&adap->dev, "Invalid %d-bit I2C address 0x%02hx\n",  in i2c_new_client_device()
755 	status = i2c_check_addr_busy(adap, i2c_encode_flags_to_addr(client));  in i2c_new_client_device()
765 	i2c_dev_set_name(adap, client, info);  in i2c_new_client_device()
770 			dev_err(&adap->dev,  in i2c_new_client_device()
781 	dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",  in i2c_new_client_device()
792 	dev_err(&adap->dev,  in i2c_new_client_device()
816 i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)  in i2c_new_device()  argument
820 	ret = i2c_new_client_device(adap, info);  in i2c_new_device()
1013 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_adapter_dev_release()  local
1014 	complete(&adap->dev_released);  in i2c_adapter_dev_release()
1045 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_sysfs_new_device()  local
1085 	client = i2c_new_client_device(adap, &info);  in i2c_sysfs_new_device()
1090 	mutex_lock(&adap->userspace_clients_lock);  in i2c_sysfs_new_device()
1091 	list_add_tail(&client->detected, &adap->userspace_clients);  in i2c_sysfs_new_device()
1092 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_sysfs_new_device()
1113 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_sysfs_delete_device()  local
1132 	mutex_lock_nested(&adap->userspace_clients_lock,  in i2c_sysfs_delete_device()
1133 			  i2c_adapter_depth(adap));  in i2c_sysfs_delete_device()
1134 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in i2c_sysfs_delete_device()
1146 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_sysfs_delete_device()
1208 			      struct i2c_adapter *adap)  in i2c_do_add_adapter()  argument
1211 	i2c_detect(adap, driver);  in i2c_do_add_adapter()
1227 static void i2c_host_notify_irq_teardown(struct i2c_adapter *adap)  in i2c_host_notify_irq_teardown()  argument
1229 	struct irq_domain *domain = adap->host_notify_domain;  in i2c_host_notify_irq_teardown()
1239 	adap->host_notify_domain = NULL;  in i2c_host_notify_irq_teardown()
1255 static int i2c_setup_host_notify_irq_domain(struct i2c_adapter *adap)  in i2c_setup_host_notify_irq_domain()  argument
1259 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_HOST_NOTIFY))  in i2c_setup_host_notify_irq_domain()
1262 	domain = irq_domain_create_linear(adap->dev.fwnode,  in i2c_setup_host_notify_irq_domain()
1264 					  &i2c_host_notify_irq_ops, adap);  in i2c_setup_host_notify_irq_domain()
1268 	adap->host_notify_domain = domain;  in i2c_setup_host_notify_irq_domain()
1283 int i2c_handle_smbus_host_notify(struct i2c_adapter *adap, unsigned short addr)  in i2c_handle_smbus_host_notify()  argument
1287 	if (!adap)  in i2c_handle_smbus_host_notify()
1290 	irq = irq_find_mapping(adap->host_notify_domain, addr);  in i2c_handle_smbus_host_notify()
1300 static int i2c_register_adapter(struct i2c_adapter *adap)  in i2c_register_adapter()  argument
1311 	if (WARN(!adap->name[0], "i2c adapter has no name"))  in i2c_register_adapter()
1314 	if (!adap->algo) {  in i2c_register_adapter()
1315 		pr_err("adapter '%s': no algo supplied!\n", adap->name);  in i2c_register_adapter()
1319 	if (!adap->lock_ops)  in i2c_register_adapter()
1320 		adap->lock_ops = &i2c_adapter_lock_ops;  in i2c_register_adapter()
1322 	adap->locked_flags = 0;  in i2c_register_adapter()
1323 	rt_mutex_init(&adap->bus_lock);  in i2c_register_adapter()
1324 	rt_mutex_init(&adap->mux_lock);  in i2c_register_adapter()
1325 	mutex_init(&adap->userspace_clients_lock);  in i2c_register_adapter()
1326 	INIT_LIST_HEAD(&adap->userspace_clients);  in i2c_register_adapter()
1329 	if (adap->timeout == 0)  in i2c_register_adapter()
1330 		adap->timeout = HZ;  in i2c_register_adapter()
1333 	res = i2c_setup_host_notify_irq_domain(adap);  in i2c_register_adapter()
1336 		       adap->name, res);  in i2c_register_adapter()
1340 	dev_set_name(&adap->dev, "i2c-%d", adap->nr);  in i2c_register_adapter()
1341 	adap->dev.bus = &i2c_bus_type;  in i2c_register_adapter()
1342 	adap->dev.type = &i2c_adapter_type;  in i2c_register_adapter()
1343 	res = device_register(&adap->dev);  in i2c_register_adapter()
1345 		pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);  in i2c_register_adapter()
1349 	res = of_i2c_setup_smbus_alert(adap);  in i2c_register_adapter()
1353 	dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name);  in i2c_register_adapter()
1355 	pm_runtime_no_callbacks(&adap->dev);  in i2c_register_adapter()
1356 	pm_suspend_ignore_children(&adap->dev, true);  in i2c_register_adapter()
1357 	pm_runtime_enable(&adap->dev);  in i2c_register_adapter()
1360 	res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev,  in i2c_register_adapter()
1361 				       adap->dev.parent);  in i2c_register_adapter()
1363 		dev_warn(&adap->dev,  in i2c_register_adapter()
1367 	i2c_init_recovery(adap);  in i2c_register_adapter()
1370 	of_i2c_register_devices(adap);  in i2c_register_adapter()
1371 	i2c_acpi_register_devices(adap);  in i2c_register_adapter()
1372 	i2c_acpi_install_space_handler(adap);  in i2c_register_adapter()
1374 	if (adap->nr < __i2c_first_dynamic_bus_num)  in i2c_register_adapter()
1375 		i2c_scan_static_board_info(adap);  in i2c_register_adapter()
1379 	bus_for_each_drv(&i2c_bus_type, NULL, adap, __process_new_adapter);  in i2c_register_adapter()
1385 	init_completion(&adap->dev_released);  in i2c_register_adapter()
1386 	device_unregister(&adap->dev);  in i2c_register_adapter()
1387 	wait_for_completion(&adap->dev_released);  in i2c_register_adapter()
1390 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_register_adapter()
1402 static int __i2c_add_numbered_adapter(struct i2c_adapter *adap)  in __i2c_add_numbered_adapter()  argument
1407 	id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1, GFP_KERNEL);  in __i2c_add_numbered_adapter()
1412 	return i2c_register_adapter(adap);  in __i2c_add_numbered_adapter()
1478 int i2c_add_numbered_adapter(struct i2c_adapter *adap)  in i2c_add_numbered_adapter()  argument
1480 	if (adap->nr == -1) /* -1 means dynamically assign bus id */  in i2c_add_numbered_adapter()
1481 		return i2c_add_adapter(adap);  in i2c_add_numbered_adapter()
1483 	return __i2c_add_numbered_adapter(adap);  in i2c_add_numbered_adapter()
1533 void i2c_del_adapter(struct i2c_adapter *adap)  in i2c_del_adapter()  argument
1540 	found = idr_find(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1542 	if (found != adap) {  in i2c_del_adapter()
1543 		pr_debug("attempting to delete unregistered adapter [%s]\n", adap->name);  in i2c_del_adapter()
1547 	i2c_acpi_remove_space_handler(adap);  in i2c_del_adapter()
1550 	bus_for_each_drv(&i2c_bus_type, NULL, adap,  in i2c_del_adapter()
1555 	mutex_lock_nested(&adap->userspace_clients_lock,  in i2c_del_adapter()
1556 			  i2c_adapter_depth(adap));  in i2c_del_adapter()
1557 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in i2c_del_adapter()
1559 		dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name,  in i2c_del_adapter()
1564 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_del_adapter()
1571 	device_for_each_child(&adap->dev, NULL, __unregister_client);  in i2c_del_adapter()
1572 	device_for_each_child(&adap->dev, NULL, __unregister_dummy);  in i2c_del_adapter()
1575 	class_compat_remove_link(i2c_adapter_compat_class, &adap->dev,  in i2c_del_adapter()
1576 				 adap->dev.parent);  in i2c_del_adapter()
1580 	dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);  in i2c_del_adapter()
1582 	pm_runtime_disable(&adap->dev);  in i2c_del_adapter()
1584 	i2c_host_notify_irq_teardown(adap);  in i2c_del_adapter()
1593 	init_completion(&adap->dev_released);  in i2c_del_adapter()
1594 	device_unregister(&adap->dev);  in i2c_del_adapter()
1595 	wait_for_completion(&adap->dev_released);  in i2c_del_adapter()
1599 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1604 	memset(&adap->dev, 0, sizeof(adap->dev));  in i2c_del_adapter()
1792 void i2c_clients_command(struct i2c_adapter *adap, unsigned int cmd, void *arg)  in i2c_clients_command()  argument
1798 	device_for_each_child(&adap->dev, &cmd_arg, i2c_cmd);  in i2c_clients_command()
1875 static int i2c_quirk_error(struct i2c_adapter *adap, struct i2c_msg *msg, char *err_msg)  in i2c_quirk_error()  argument
1877 	dev_err_ratelimited(&adap->dev, "adapter quirk: %s (addr 0x%04x, size %u, %s)\n",  in i2c_quirk_error()
1883 static int i2c_check_for_quirks(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_check_for_quirks()  argument
1885 	const struct i2c_adapter_quirks *q = adap->quirks;  in i2c_check_for_quirks()
1895 				return i2c_quirk_error(adap, &msgs[0], "1st comb msg must be write");  in i2c_check_for_quirks()
1898 				return i2c_quirk_error(adap, &msgs[1], "2nd comb msg must be read");  in i2c_check_for_quirks()
1901 				return i2c_quirk_error(adap, &msgs[0], "comb msg only to same addr");  in i2c_check_for_quirks()
1904 				return i2c_quirk_error(adap, &msgs[0], "msg too long");  in i2c_check_for_quirks()
1907 				return i2c_quirk_error(adap, &msgs[1], "msg too long");  in i2c_check_for_quirks()
1914 		return i2c_quirk_error(adap, &msgs[0], "too many messages");  in i2c_check_for_quirks()
1921 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
1924 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
1927 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
1930 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
1949 int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in __i2c_transfer()  argument
1957 	ret = __i2c_check_suspended(adap);  in __i2c_transfer()
1961 	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))  in __i2c_transfer()
1973 				trace_i2c_read(adap, &msgs[i], i);  in __i2c_transfer()
1975 				trace_i2c_write(adap, &msgs[i], i);  in __i2c_transfer()
1980 	for (ret = 0, try = 0; try <= adap->retries; try++) {  in __i2c_transfer()
1981 		if (i2c_in_atomic_xfer_mode() && adap->algo->master_xfer_atomic)  in __i2c_transfer()
1982 			ret = adap->algo->master_xfer_atomic(adap, msgs, num);  in __i2c_transfer()
1984 			ret = adap->algo->master_xfer(adap, msgs, num);  in __i2c_transfer()
1988 		if (time_after(jiffies, orig_jiffies + adap->timeout))  in __i2c_transfer()
1996 				trace_i2c_reply(adap, &msgs[i], i);  in __i2c_transfer()
1997 		trace_i2c_result(adap, num, ret);  in __i2c_transfer()
2016 int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_transfer()  argument
2020 	if (!adap->algo->master_xfer) {  in i2c_transfer()
2021 		dev_dbg(&adap->dev, "I2C level transfers not supported\n");  in i2c_transfer()
2041 	ret = __i2c_lock_bus_helper(adap);  in i2c_transfer()
2045 	ret = __i2c_transfer(adap, msgs, num);  in i2c_transfer()
2046 	i2c_unlock_bus(adap, I2C_LOCK_SEGMENT);  in i2c_transfer()
2093 	struct i2c_adapter *adap = client->adapter;  in i2c_get_device_id()  local
2097 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_I2C_BLOCK))  in i2c_get_device_id()
2101 	ret = i2c_smbus_xfer(adap, I2C_ADDR_DEVICE_ID, 0,  in i2c_get_device_id()
2132 static int i2c_default_probe(struct i2c_adapter *adap, unsigned short addr)  in i2c_default_probe()  argument
2138 	if (addr == 0x73 && (adap->class & I2C_CLASS_HWMON)  in i2c_default_probe()
2139 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE_DATA))  in i2c_default_probe()
2140 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2145 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK))  in i2c_default_probe()
2146 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_WRITE, 0,  in i2c_default_probe()
2148 	else if (i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE))  in i2c_default_probe()
2149 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2152 		dev_warn(&adap->dev, "No suitable probing method supported for address 0x%02X\n",  in i2c_default_probe()
2266 int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr)  in i2c_probe_func_quick_read()  argument
2268 	return i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_probe_func_quick_read()
2274 i2c_new_probed_device(struct i2c_adapter *adap,  in i2c_new_probed_device()  argument
2277 		      int (*probe)(struct i2c_adapter *adap, unsigned short addr))  in i2c_new_probed_device()  argument
2287 			dev_warn(&adap->dev, "Invalid 7-bit address 0x%02x\n",  in i2c_new_probed_device()
2293 		if (i2c_check_addr_busy(adap, addr_list[i])) {  in i2c_new_probed_device()
2294 			dev_dbg(&adap->dev,  in i2c_new_probed_device()
2301 		if (probe(adap, addr_list[i]))  in i2c_new_probed_device()
2306 		dev_dbg(&adap->dev, "Probing failed, no device found\n");  in i2c_new_probed_device()
2311 	return i2c_new_device(adap, info);  in i2c_new_probed_device()
2335 void i2c_put_adapter(struct i2c_adapter *adap)  in i2c_put_adapter()  argument
2337 	if (!adap)  in i2c_put_adapter()
2340 	put_device(&adap->dev);  in i2c_put_adapter()
2341 	module_put(adap->owner);  in i2c_put_adapter()