136 static int get_scl_gpio_value(struct i2c_adapter *adap)  in get_scl_gpio_value()  argument
138 	return gpiod_get_value_cansleep(adap->bus_recovery_info->scl_gpiod);  in get_scl_gpio_value()
141 static void set_scl_gpio_value(struct i2c_adapter *adap, int val)  in set_scl_gpio_value()  argument
143 	gpiod_set_value_cansleep(adap->bus_recovery_info->scl_gpiod, val);  in set_scl_gpio_value()
146 static int get_sda_gpio_value(struct i2c_adapter *adap)  in get_sda_gpio_value()  argument
148 	return gpiod_get_value_cansleep(adap->bus_recovery_info->sda_gpiod);  in get_sda_gpio_value()
151 static void set_sda_gpio_value(struct i2c_adapter *adap, int val)  in set_sda_gpio_value()  argument
153 	gpiod_set_value_cansleep(adap->bus_recovery_info->sda_gpiod, val);  in set_sda_gpio_value()
156 static int i2c_generic_bus_free(struct i2c_adapter *adap)  in i2c_generic_bus_free()  argument
158 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_bus_free()
162 		ret = bri->get_bus_free(adap);  in i2c_generic_bus_free()
164 		ret = bri->get_sda(adap);  in i2c_generic_bus_free()
180 int i2c_generic_scl_recovery(struct i2c_adapter *adap)  in i2c_generic_scl_recovery()  argument
182 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_scl_recovery()
186 		bri->prepare_recovery(adap);  in i2c_generic_scl_recovery()
197 	bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
200 		bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
209 			if (!bri->get_scl(adap)) {  in i2c_generic_scl_recovery()
210 				dev_err(&adap->dev,  in i2c_generic_scl_recovery()
218 		bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
228 			bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
232 			ret = i2c_generic_bus_free(adap);  in i2c_generic_scl_recovery()
243 		bri->unprepare_recovery(adap);  in i2c_generic_scl_recovery()
251 int i2c_recover_bus(struct i2c_adapter *adap)  in i2c_recover_bus()  argument
253 	if (!adap->bus_recovery_info)  in i2c_recover_bus()
256 	dev_dbg(&adap->dev, "Trying i2c bus recovery\n");  in i2c_recover_bus()
257 	return adap->bus_recovery_info->recover_bus(adap);  in i2c_recover_bus()
261 static void i2c_gpio_init_pinctrl_recovery(struct i2c_adapter *adap)  in i2c_gpio_init_pinctrl_recovery()  argument
263 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_gpio_init_pinctrl_recovery()
264 	struct device *dev = &adap->dev;  in i2c_gpio_init_pinctrl_recovery()
306 static int i2c_gpio_init_generic_recovery(struct i2c_adapter *adap)  in i2c_gpio_init_generic_recovery()  argument
308 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_gpio_init_generic_recovery()
309 	struct device *dev = &adap->dev;  in i2c_gpio_init_generic_recovery()
374 static int i2c_gpio_init_recovery(struct i2c_adapter *adap)  in i2c_gpio_init_recovery()  argument
376 	i2c_gpio_init_pinctrl_recovery(adap);  in i2c_gpio_init_recovery()
377 	return i2c_gpio_init_generic_recovery(adap);  in i2c_gpio_init_recovery()
380 static int i2c_init_recovery(struct i2c_adapter *adap)  in i2c_init_recovery()  argument
382 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_init_recovery()
388 	if (i2c_gpio_init_recovery(adap) == -EPROBE_DEFER)  in i2c_init_recovery()
420 	dev_printk(err_level, &adap->dev, "Not using recovery: %s\n", err_str);  in i2c_init_recovery()
421 	adap->bus_recovery_info = NULL;  in i2c_init_recovery()
428 	struct i2c_adapter *adap = client->adapter;  in i2c_smbus_host_notify_to_irq()  local
431 	if (!adap->host_notify_domain)  in i2c_smbus_host_notify_to_irq()
437 	irq = irq_create_mapping(adap->host_notify_domain, client->addr);  in i2c_smbus_host_notify_to_irq()
810 static void i2c_dev_set_name(struct i2c_adapter *adap,  in i2c_dev_set_name()  argument
828 		dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap),  in i2c_dev_set_name()
831 		dev_set_name(&client->dev, "%d-%04x-%01x", i2c_adapter_id(adap),  in i2c_dev_set_name()
878 i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info)  in i2c_new_client_device()  argument
887 	client->adapter = adap;  in i2c_new_client_device()
902 		dev_err(&adap->dev, "Invalid %d-bit I2C address 0x%02hx\n",  in i2c_new_client_device()
908 	status = i2c_check_addr_ex(adap, i2c_encode_flags_to_addr(client));  in i2c_new_client_device()
910 		dev_err(&adap->dev,  in i2c_new_client_device()
920 	i2c_dev_set_name(adap, client, info, status);  in i2c_new_client_device()
925 			dev_err(&adap->dev,  in i2c_new_client_device()
936 	dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",  in i2c_new_client_device()
1116 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_adapter_dev_release()  local
1117 	complete(&adap->dev_released);  in i2c_adapter_dev_release()
1148 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in new_device_store()  local
1188 	client = i2c_new_client_device(adap, &info);  in new_device_store()
1193 	mutex_lock(&adap->userspace_clients_lock);  in new_device_store()
1194 	list_add_tail(&client->detected, &adap->userspace_clients);  in new_device_store()
1195 	mutex_unlock(&adap->userspace_clients_lock);  in new_device_store()
1216 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in delete_device_store()  local
1235 	mutex_lock_nested(&adap->userspace_clients_lock,  in delete_device_store()
1236 			  i2c_adapter_depth(adap));  in delete_device_store()
1237 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in delete_device_store()
1249 	mutex_unlock(&adap->userspace_clients_lock);  in delete_device_store()
1310 			      struct i2c_adapter *adap)  in i2c_do_add_adapter()  argument
1313 	i2c_detect(adap, driver);  in i2c_do_add_adapter()
1329 static void i2c_host_notify_irq_teardown(struct i2c_adapter *adap)  in i2c_host_notify_irq_teardown()  argument
1331 	struct irq_domain *domain = adap->host_notify_domain;  in i2c_host_notify_irq_teardown()
1341 	adap->host_notify_domain = NULL;  in i2c_host_notify_irq_teardown()
1357 static int i2c_setup_host_notify_irq_domain(struct i2c_adapter *adap)  in i2c_setup_host_notify_irq_domain()  argument
1361 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_HOST_NOTIFY))  in i2c_setup_host_notify_irq_domain()
1364 	domain = irq_domain_create_linear(adap->dev.parent->fwnode,  in i2c_setup_host_notify_irq_domain()
1366 					  &i2c_host_notify_irq_ops, adap);  in i2c_setup_host_notify_irq_domain()
1370 	adap->host_notify_domain = domain;  in i2c_setup_host_notify_irq_domain()
1385 int i2c_handle_smbus_host_notify(struct i2c_adapter *adap, unsigned short addr)  in i2c_handle_smbus_host_notify()  argument
1389 	if (!adap)  in i2c_handle_smbus_host_notify()
1392 	irq = irq_find_mapping(adap->host_notify_domain, addr);  in i2c_handle_smbus_host_notify()
1402 static int i2c_register_adapter(struct i2c_adapter *adap)  in i2c_register_adapter()  argument
1413 	if (WARN(!adap->name[0], "i2c adapter has no name"))  in i2c_register_adapter()
1416 	if (!adap->algo) {  in i2c_register_adapter()
1417 		pr_err("adapter '%s': no algo supplied!\n", adap->name);  in i2c_register_adapter()
1421 	if (!adap->lock_ops)  in i2c_register_adapter()
1422 		adap->lock_ops = &i2c_adapter_lock_ops;  in i2c_register_adapter()
1424 	adap->locked_flags = 0;  in i2c_register_adapter()
1425 	rt_mutex_init(&adap->bus_lock);  in i2c_register_adapter()
1426 	rt_mutex_init(&adap->mux_lock);  in i2c_register_adapter()
1427 	mutex_init(&adap->userspace_clients_lock);  in i2c_register_adapter()
1428 	INIT_LIST_HEAD(&adap->userspace_clients);  in i2c_register_adapter()
1431 	if (adap->timeout == 0)  in i2c_register_adapter()
1432 		adap->timeout = HZ;  in i2c_register_adapter()
1435 	res = i2c_setup_host_notify_irq_domain(adap);  in i2c_register_adapter()
1438 		       adap->name, res);  in i2c_register_adapter()
1442 	dev_set_name(&adap->dev, "i2c-%d", adap->nr);  in i2c_register_adapter()
1443 	adap->dev.bus = &i2c_bus_type;  in i2c_register_adapter()
1444 	adap->dev.type = &i2c_adapter_type;  in i2c_register_adapter()
1445 	res = device_register(&adap->dev);  in i2c_register_adapter()
1447 		pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);  in i2c_register_adapter()
1451 	res = of_i2c_setup_smbus_alert(adap);  in i2c_register_adapter()
1455 	pm_runtime_no_callbacks(&adap->dev);  in i2c_register_adapter()
1456 	pm_suspend_ignore_children(&adap->dev, true);  in i2c_register_adapter()
1457 	pm_runtime_enable(&adap->dev);  in i2c_register_adapter()
1459 	res = i2c_init_recovery(adap);  in i2c_register_adapter()
1463 	dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name);  in i2c_register_adapter()
1466 	res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev,  in i2c_register_adapter()
1467 				       adap->dev.parent);  in i2c_register_adapter()
1469 		dev_warn(&adap->dev,  in i2c_register_adapter()
1474 	of_i2c_register_devices(adap);  in i2c_register_adapter()
1475 	i2c_acpi_install_space_handler(adap);  in i2c_register_adapter()
1476 	i2c_acpi_register_devices(adap);  in i2c_register_adapter()
1478 	if (adap->nr < __i2c_first_dynamic_bus_num)  in i2c_register_adapter()
1479 		i2c_scan_static_board_info(adap);  in i2c_register_adapter()
1483 	bus_for_each_drv(&i2c_bus_type, NULL, adap, __process_new_adapter);  in i2c_register_adapter()
1489 	init_completion(&adap->dev_released);  in i2c_register_adapter()
1490 	device_unregister(&adap->dev);  in i2c_register_adapter()
1491 	wait_for_completion(&adap->dev_released);  in i2c_register_adapter()
1494 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_register_adapter()
1506 static int __i2c_add_numbered_adapter(struct i2c_adapter *adap)  in __i2c_add_numbered_adapter()  argument
1511 	id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1, GFP_KERNEL);  in __i2c_add_numbered_adapter()
1516 	return i2c_register_adapter(adap);  in __i2c_add_numbered_adapter()
1582 int i2c_add_numbered_adapter(struct i2c_adapter *adap)  in i2c_add_numbered_adapter()  argument
1584 	if (adap->nr == -1) /* -1 means dynamically assign bus id */  in i2c_add_numbered_adapter()
1585 		return i2c_add_adapter(adap);  in i2c_add_numbered_adapter()
1587 	return __i2c_add_numbered_adapter(adap);  in i2c_add_numbered_adapter()
1637 void i2c_del_adapter(struct i2c_adapter *adap)  in i2c_del_adapter()  argument
1644 	found = idr_find(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1646 	if (found != adap) {  in i2c_del_adapter()
1647 		pr_debug("attempting to delete unregistered adapter [%s]\n", adap->name);  in i2c_del_adapter()
1651 	i2c_acpi_remove_space_handler(adap);  in i2c_del_adapter()
1654 	bus_for_each_drv(&i2c_bus_type, NULL, adap,  in i2c_del_adapter()
1659 	mutex_lock_nested(&adap->userspace_clients_lock,  in i2c_del_adapter()
1660 			  i2c_adapter_depth(adap));  in i2c_del_adapter()
1661 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in i2c_del_adapter()
1663 		dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name,  in i2c_del_adapter()
1668 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_del_adapter()
1675 	device_for_each_child(&adap->dev, NULL, __unregister_client);  in i2c_del_adapter()
1676 	device_for_each_child(&adap->dev, NULL, __unregister_dummy);  in i2c_del_adapter()
1679 	class_compat_remove_link(i2c_adapter_compat_class, &adap->dev,  in i2c_del_adapter()
1680 				 adap->dev.parent);  in i2c_del_adapter()
1684 	dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);  in i2c_del_adapter()
1686 	pm_runtime_disable(&adap->dev);  in i2c_del_adapter()
1688 	i2c_host_notify_irq_teardown(adap);  in i2c_del_adapter()
1697 	init_completion(&adap->dev_released);  in i2c_del_adapter()
1698 	device_unregister(&adap->dev);  in i2c_del_adapter()
1699 	wait_for_completion(&adap->dev_released);  in i2c_del_adapter()
1703 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1708 	memset(&adap->dev, 0, sizeof(adap->dev));  in i2c_del_adapter()
1892 void i2c_clients_command(struct i2c_adapter *adap, unsigned int cmd, void *arg)  in i2c_clients_command()  argument
1898 	device_for_each_child(&adap->dev, &cmd_arg, i2c_cmd);  in i2c_clients_command()
1975 static int i2c_quirk_error(struct i2c_adapter *adap, struct i2c_msg *msg, char *err_msg)  in i2c_quirk_error()  argument
1977 	dev_err_ratelimited(&adap->dev, "adapter quirk: %s (addr 0x%04x, size %u, %s)\n",  in i2c_quirk_error()
1983 static int i2c_check_for_quirks(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_check_for_quirks()  argument
1985 	const struct i2c_adapter_quirks *q = adap->quirks;  in i2c_check_for_quirks()
1995 				return i2c_quirk_error(adap, &msgs[0], "1st comb msg must be write");  in i2c_check_for_quirks()
1998 				return i2c_quirk_error(adap, &msgs[1], "2nd comb msg must be read");  in i2c_check_for_quirks()
2001 				return i2c_quirk_error(adap, &msgs[0], "comb msg only to same addr");  in i2c_check_for_quirks()
2004 				return i2c_quirk_error(adap, &msgs[0], "msg too long");  in i2c_check_for_quirks()
2007 				return i2c_quirk_error(adap, &msgs[1], "msg too long");  in i2c_check_for_quirks()
2014 		return i2c_quirk_error(adap, &msgs[0], "too many messages");  in i2c_check_for_quirks()
2021 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
2024 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
2027 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
2030 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
2049 int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in __i2c_transfer()  argument
2057 	ret = __i2c_check_suspended(adap);  in __i2c_transfer()
2061 	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))  in __i2c_transfer()
2073 				trace_i2c_read(adap, &msgs[i], i);  in __i2c_transfer()
2075 				trace_i2c_write(adap, &msgs[i], i);  in __i2c_transfer()
2080 	for (ret = 0, try = 0; try <= adap->retries; try++) {  in __i2c_transfer()
2081 		if (i2c_in_atomic_xfer_mode() && adap->algo->master_xfer_atomic)  in __i2c_transfer()
2082 			ret = adap->algo->master_xfer_atomic(adap, msgs, num);  in __i2c_transfer()
2084 			ret = adap->algo->master_xfer(adap, msgs, num);  in __i2c_transfer()
2088 		if (time_after(jiffies, orig_jiffies + adap->timeout))  in __i2c_transfer()
2096 				trace_i2c_reply(adap, &msgs[i], i);  in __i2c_transfer()
2097 		trace_i2c_result(adap, num, ret);  in __i2c_transfer()
2116 int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_transfer()  argument
2120 	if (!adap->algo->master_xfer) {  in i2c_transfer()
2121 		dev_dbg(&adap->dev, "I2C level transfers not supported\n");  in i2c_transfer()
2141 	ret = __i2c_lock_bus_helper(adap);  in i2c_transfer()
2145 	ret = __i2c_transfer(adap, msgs, num);  in i2c_transfer()
2146 	i2c_unlock_bus(adap, I2C_LOCK_SEGMENT);  in i2c_transfer()
2193 	struct i2c_adapter *adap = client->adapter;  in i2c_get_device_id()  local
2197 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_I2C_BLOCK))  in i2c_get_device_id()
2201 	ret = i2c_smbus_xfer(adap, I2C_ADDR_DEVICE_ID, 0,  in i2c_get_device_id()
2232 static int i2c_default_probe(struct i2c_adapter *adap, unsigned short addr)  in i2c_default_probe()  argument
2238 	if (addr == 0x73 && (adap->class & I2C_CLASS_HWMON)  in i2c_default_probe()
2239 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE_DATA))  in i2c_default_probe()
2240 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2245 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK))  in i2c_default_probe()
2246 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_WRITE, 0,  in i2c_default_probe()
2248 	else if (i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE))  in i2c_default_probe()
2249 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2252 		dev_warn(&adap->dev, "No suitable probing method supported for address 0x%02X\n",  in i2c_default_probe()
2365 int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr)  in i2c_probe_func_quick_read()  argument
2367 	return i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_probe_func_quick_read()
2373 i2c_new_scanned_device(struct i2c_adapter *adap,  in i2c_new_scanned_device()  argument
2376 		       int (*probe)(struct i2c_adapter *adap, unsigned short addr))  in i2c_new_scanned_device()  argument
2386 			dev_warn(&adap->dev, "Invalid 7-bit address 0x%02x\n",  in i2c_new_scanned_device()
2392 		if (i2c_check_addr_busy(adap, addr_list[i])) {  in i2c_new_scanned_device()
2393 			dev_dbg(&adap->dev,  in i2c_new_scanned_device()
2400 		if (probe(adap, addr_list[i]))  in i2c_new_scanned_device()
2405 		dev_dbg(&adap->dev, "Probing failed, no device found\n");  in i2c_new_scanned_device()
2410 	return i2c_new_client_device(adap, info);  in i2c_new_scanned_device()
2434 void i2c_put_adapter(struct i2c_adapter *adap)  in i2c_put_adapter()  argument
2436 	if (!adap)  in i2c_put_adapter()
2439 	module_put(adap->owner);  in i2c_put_adapter()
2441 	put_device(&adap->dev);  in i2c_put_adapter()