176 static int get_scl_gpio_value(struct i2c_adapter *adap)  in get_scl_gpio_value()  argument
178 	return gpiod_get_value_cansleep(adap->bus_recovery_info->scl_gpiod);  in get_scl_gpio_value()
181 static void set_scl_gpio_value(struct i2c_adapter *adap, int val)  in set_scl_gpio_value()  argument
183 	gpiod_set_value_cansleep(adap->bus_recovery_info->scl_gpiod, val);  in set_scl_gpio_value()
186 static int get_sda_gpio_value(struct i2c_adapter *adap)  in get_sda_gpio_value()  argument
188 	return gpiod_get_value_cansleep(adap->bus_recovery_info->sda_gpiod);  in get_sda_gpio_value()
191 static void set_sda_gpio_value(struct i2c_adapter *adap, int val)  in set_sda_gpio_value()  argument
193 	gpiod_set_value_cansleep(adap->bus_recovery_info->sda_gpiod, val);  in set_sda_gpio_value()
196 static int i2c_generic_bus_free(struct i2c_adapter *adap)  in i2c_generic_bus_free()  argument
198 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_bus_free()
202 		ret = bri->get_bus_free(adap);  in i2c_generic_bus_free()
204 		ret = bri->get_sda(adap);  in i2c_generic_bus_free()
220 int i2c_generic_scl_recovery(struct i2c_adapter *adap)  in i2c_generic_scl_recovery()  argument
222 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_scl_recovery()
226 		bri->prepare_recovery(adap);  in i2c_generic_scl_recovery()
237 	bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
240 		bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
249 			if (!bri->get_scl(adap)) {  in i2c_generic_scl_recovery()
250 				dev_err(&adap->dev,  in i2c_generic_scl_recovery()
258 		bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
268 			bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
272 			ret = i2c_generic_bus_free(adap);  in i2c_generic_scl_recovery()
283 		bri->unprepare_recovery(adap);  in i2c_generic_scl_recovery()
291 int i2c_recover_bus(struct i2c_adapter *adap)  in i2c_recover_bus()  argument
293 	if (!adap->bus_recovery_info)  in i2c_recover_bus()
296 	dev_dbg(&adap->dev, "Trying i2c bus recovery\n");  in i2c_recover_bus()
297 	return adap->bus_recovery_info->recover_bus(adap);  in i2c_recover_bus()
301 static void i2c_gpio_init_pinctrl_recovery(struct i2c_adapter *adap)  in i2c_gpio_init_pinctrl_recovery()  argument
303 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_gpio_init_pinctrl_recovery()
304 	struct device *dev = &adap->dev;  in i2c_gpio_init_pinctrl_recovery()
348 static int i2c_gpio_init_generic_recovery(struct i2c_adapter *adap)  in i2c_gpio_init_generic_recovery()  argument
350 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_gpio_init_generic_recovery()
351 	struct device *dev = &adap->dev;  in i2c_gpio_init_generic_recovery()
416 static int i2c_gpio_init_recovery(struct i2c_adapter *adap)  in i2c_gpio_init_recovery()  argument
418 	i2c_gpio_init_pinctrl_recovery(adap);  in i2c_gpio_init_recovery()
419 	return i2c_gpio_init_generic_recovery(adap);  in i2c_gpio_init_recovery()
422 static int i2c_init_recovery(struct i2c_adapter *adap)  in i2c_init_recovery()  argument
424 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_init_recovery()
431 	if (i2c_gpio_init_recovery(adap) == -EPROBE_DEFER)  in i2c_init_recovery()
464 		dev_err(&adap->dev, "Not using recovery: %s\n", err_str);  in i2c_init_recovery()
466 		dev_dbg(&adap->dev, "Not using recovery: %s\n", err_str);  in i2c_init_recovery()
467 	adap->bus_recovery_info = NULL;  in i2c_init_recovery()
474 	struct i2c_adapter *adap = client->adapter;  in i2c_smbus_host_notify_to_irq()  local
477 	if (!adap->host_notify_domain)  in i2c_smbus_host_notify_to_irq()
483 	irq = irq_create_mapping(adap->host_notify_domain, client->addr);  in i2c_smbus_host_notify_to_irq()
869 static void i2c_dev_set_name(struct i2c_adapter *adap,  in i2c_dev_set_name()  argument
885 	dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap),  in i2c_dev_set_name()
932 i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info)  in i2c_new_client_device()  argument
941 	client->adapter = adap;  in i2c_new_client_device()
956 		dev_err(&adap->dev, "Invalid %d-bit I2C address 0x%02hx\n",  in i2c_new_client_device()
962 	status = i2c_check_addr_busy(adap, i2c_encode_flags_to_addr(client));  in i2c_new_client_device()
973 	i2c_dev_set_name(adap, client, info);  in i2c_new_client_device()
978 			dev_err(&adap->dev,  in i2c_new_client_device()
989 	dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",  in i2c_new_client_device()
999 	dev_err(&adap->dev,  in i2c_new_client_device()
1185 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_adapter_dev_release()  local
1186 	complete(&adap->dev_released);  in i2c_adapter_dev_release()
1217 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in new_device_store()  local
1257 	client = i2c_new_client_device(adap, &info);  in new_device_store()
1262 	mutex_lock(&adap->userspace_clients_lock);  in new_device_store()
1263 	list_add_tail(&client->detected, &adap->userspace_clients);  in new_device_store()
1264 	mutex_unlock(&adap->userspace_clients_lock);  in new_device_store()
1285 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in delete_device_store()  local
1304 	mutex_lock_nested(&adap->userspace_clients_lock,  in delete_device_store()
1305 			  i2c_adapter_depth(adap));  in delete_device_store()
1306 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in delete_device_store()
1318 	mutex_unlock(&adap->userspace_clients_lock);  in delete_device_store()
1379 			      struct i2c_adapter *adap)  in i2c_do_add_adapter()  argument
1382 	i2c_detect(adap, driver);  in i2c_do_add_adapter()
1398 static void i2c_host_notify_irq_teardown(struct i2c_adapter *adap)  in i2c_host_notify_irq_teardown()  argument
1400 	struct irq_domain *domain = adap->host_notify_domain;  in i2c_host_notify_irq_teardown()
1410 	adap->host_notify_domain = NULL;  in i2c_host_notify_irq_teardown()
1426 static int i2c_setup_host_notify_irq_domain(struct i2c_adapter *adap)  in i2c_setup_host_notify_irq_domain()  argument
1430 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_HOST_NOTIFY))  in i2c_setup_host_notify_irq_domain()
1433 	domain = irq_domain_create_linear(adap->dev.parent->fwnode,  in i2c_setup_host_notify_irq_domain()
1435 					  &i2c_host_notify_irq_ops, adap);  in i2c_setup_host_notify_irq_domain()
1439 	adap->host_notify_domain = domain;  in i2c_setup_host_notify_irq_domain()
1454 int i2c_handle_smbus_host_notify(struct i2c_adapter *adap, unsigned short addr)  in i2c_handle_smbus_host_notify()  argument
1458 	if (!adap)  in i2c_handle_smbus_host_notify()
1461 	irq = irq_find_mapping(adap->host_notify_domain, addr);  in i2c_handle_smbus_host_notify()
1471 static int i2c_register_adapter(struct i2c_adapter *adap)  in i2c_register_adapter()  argument
1482 	if (WARN(!adap->name[0], "i2c adapter has no name"))  in i2c_register_adapter()
1485 	if (!adap->algo) {  in i2c_register_adapter()
1486 		pr_err("adapter '%s': no algo supplied!\n", adap->name);  in i2c_register_adapter()
1490 	if (!adap->lock_ops)  in i2c_register_adapter()
1491 		adap->lock_ops = &i2c_adapter_lock_ops;  in i2c_register_adapter()
1493 	adap->locked_flags = 0;  in i2c_register_adapter()
1494 	rt_mutex_init(&adap->bus_lock);  in i2c_register_adapter()
1495 	rt_mutex_init(&adap->mux_lock);  in i2c_register_adapter()
1496 	mutex_init(&adap->userspace_clients_lock);  in i2c_register_adapter()
1497 	INIT_LIST_HEAD(&adap->userspace_clients);  in i2c_register_adapter()
1500 	if (adap->timeout == 0)  in i2c_register_adapter()
1501 		adap->timeout = HZ;  in i2c_register_adapter()
1504 	res = i2c_setup_host_notify_irq_domain(adap);  in i2c_register_adapter()
1507 		       adap->name, res);  in i2c_register_adapter()
1511 	dev_set_name(&adap->dev, "i2c-%d", adap->nr);  in i2c_register_adapter()
1512 	adap->dev.bus = &i2c_bus_type;  in i2c_register_adapter()
1513 	adap->dev.type = &i2c_adapter_type;  in i2c_register_adapter()
1514 	res = device_register(&adap->dev);  in i2c_register_adapter()
1516 		pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);  in i2c_register_adapter()
1520 	res = i2c_setup_smbus_alert(adap);  in i2c_register_adapter()
1524 	device_enable_async_suspend(&adap->dev);  in i2c_register_adapter()
1525 	pm_runtime_no_callbacks(&adap->dev);  in i2c_register_adapter()
1526 	pm_suspend_ignore_children(&adap->dev, true);  in i2c_register_adapter()
1527 	pm_runtime_enable(&adap->dev);  in i2c_register_adapter()
1529 	res = i2c_init_recovery(adap);  in i2c_register_adapter()
1533 	dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name);  in i2c_register_adapter()
1536 	res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev,  in i2c_register_adapter()
1537 				       adap->dev.parent);  in i2c_register_adapter()
1539 		dev_warn(&adap->dev,  in i2c_register_adapter()
1544 	of_i2c_register_devices(adap);  in i2c_register_adapter()
1545 	i2c_acpi_install_space_handler(adap);  in i2c_register_adapter()
1546 	i2c_acpi_register_devices(adap);  in i2c_register_adapter()
1548 	if (adap->nr < __i2c_first_dynamic_bus_num)  in i2c_register_adapter()
1549 		i2c_scan_static_board_info(adap);  in i2c_register_adapter()
1553 	bus_for_each_drv(&i2c_bus_type, NULL, adap, __process_new_adapter);  in i2c_register_adapter()
1559 	init_completion(&adap->dev_released);  in i2c_register_adapter()
1560 	device_unregister(&adap->dev);  in i2c_register_adapter()
1561 	wait_for_completion(&adap->dev_released);  in i2c_register_adapter()
1564 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_register_adapter()
1576 static int __i2c_add_numbered_adapter(struct i2c_adapter *adap)  in __i2c_add_numbered_adapter()  argument
1581 	id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1, GFP_KERNEL);  in __i2c_add_numbered_adapter()
1586 	return i2c_register_adapter(adap);  in __i2c_add_numbered_adapter()
1652 int i2c_add_numbered_adapter(struct i2c_adapter *adap)  in i2c_add_numbered_adapter()  argument
1654 	if (adap->nr == -1) /* -1 means dynamically assign bus id */  in i2c_add_numbered_adapter()
1655 		return i2c_add_adapter(adap);  in i2c_add_numbered_adapter()
1657 	return __i2c_add_numbered_adapter(adap);  in i2c_add_numbered_adapter()
1707 void i2c_del_adapter(struct i2c_adapter *adap)  in i2c_del_adapter()  argument
1714 	found = idr_find(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1716 	if (found != adap) {  in i2c_del_adapter()
1717 		pr_debug("attempting to delete unregistered adapter [%s]\n", adap->name);  in i2c_del_adapter()
1721 	i2c_acpi_remove_space_handler(adap);  in i2c_del_adapter()
1724 	bus_for_each_drv(&i2c_bus_type, NULL, adap,  in i2c_del_adapter()
1729 	mutex_lock_nested(&adap->userspace_clients_lock,  in i2c_del_adapter()
1730 			  i2c_adapter_depth(adap));  in i2c_del_adapter()
1731 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in i2c_del_adapter()
1733 		dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name,  in i2c_del_adapter()
1738 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_del_adapter()
1745 	device_for_each_child(&adap->dev, NULL, __unregister_client);  in i2c_del_adapter()
1746 	device_for_each_child(&adap->dev, NULL, __unregister_dummy);  in i2c_del_adapter()
1749 	class_compat_remove_link(i2c_adapter_compat_class, &adap->dev,  in i2c_del_adapter()
1750 				 adap->dev.parent);  in i2c_del_adapter()
1754 	dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);  in i2c_del_adapter()
1756 	pm_runtime_disable(&adap->dev);  in i2c_del_adapter()
1758 	i2c_host_notify_irq_teardown(adap);  in i2c_del_adapter()
1767 	init_completion(&adap->dev_released);  in i2c_del_adapter()
1768 	device_unregister(&adap->dev);  in i2c_del_adapter()
1769 	wait_for_completion(&adap->dev_released);  in i2c_del_adapter()
1773 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1778 	memset(&adap->dev, 0, sizeof(adap->dev));  in i2c_del_adapter()
2030 void i2c_clients_command(struct i2c_adapter *adap, unsigned int cmd, void *arg)  in i2c_clients_command()  argument
2036 	device_for_each_child(&adap->dev, &cmd_arg, i2c_cmd);  in i2c_clients_command()
2113 static int i2c_quirk_error(struct i2c_adapter *adap, struct i2c_msg *msg, char *err_msg)  in i2c_quirk_error()  argument
2115 	dev_err_ratelimited(&adap->dev, "adapter quirk: %s (addr 0x%04x, size %u, %s)\n",  in i2c_quirk_error()
2121 static int i2c_check_for_quirks(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_check_for_quirks()  argument
2123 	const struct i2c_adapter_quirks *q = adap->quirks;  in i2c_check_for_quirks()
2133 				return i2c_quirk_error(adap, &msgs[0], "1st comb msg must be write");  in i2c_check_for_quirks()
2136 				return i2c_quirk_error(adap, &msgs[1], "2nd comb msg must be read");  in i2c_check_for_quirks()
2139 				return i2c_quirk_error(adap, &msgs[0], "comb msg only to same addr");  in i2c_check_for_quirks()
2142 				return i2c_quirk_error(adap, &msgs[0], "msg too long");  in i2c_check_for_quirks()
2145 				return i2c_quirk_error(adap, &msgs[1], "msg too long");  in i2c_check_for_quirks()
2152 		return i2c_quirk_error(adap, &msgs[0], "too many messages");  in i2c_check_for_quirks()
2159 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
2162 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
2165 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
2168 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
2187 int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in __i2c_transfer()  argument
2195 	ret = __i2c_check_suspended(adap);  in __i2c_transfer()
2199 	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))  in __i2c_transfer()
2211 				trace_i2c_read(adap, &msgs[i], i);  in __i2c_transfer()
2213 				trace_i2c_write(adap, &msgs[i], i);  in __i2c_transfer()
2218 	for (ret = 0, try = 0; try <= adap->retries; try++) {  in __i2c_transfer()
2219 		if (i2c_in_atomic_xfer_mode() && adap->algo->master_xfer_atomic)  in __i2c_transfer()
2220 			ret = adap->algo->master_xfer_atomic(adap, msgs, num);  in __i2c_transfer()
2222 			ret = adap->algo->master_xfer(adap, msgs, num);  in __i2c_transfer()
2226 		if (time_after(jiffies, orig_jiffies + adap->timeout))  in __i2c_transfer()
2234 				trace_i2c_reply(adap, &msgs[i], i);  in __i2c_transfer()
2235 		trace_i2c_result(adap, num, ret);  in __i2c_transfer()
2254 int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_transfer()  argument
2258 	if (!adap->algo->master_xfer) {  in i2c_transfer()
2259 		dev_dbg(&adap->dev, "I2C level transfers not supported\n");  in i2c_transfer()
2279 	ret = __i2c_lock_bus_helper(adap);  in i2c_transfer()
2283 	ret = __i2c_transfer(adap, msgs, num);  in i2c_transfer()
2284 	i2c_unlock_bus(adap, I2C_LOCK_SEGMENT);  in i2c_transfer()
2331 	struct i2c_adapter *adap = client->adapter;  in i2c_get_device_id()  local
2335 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_I2C_BLOCK))  in i2c_get_device_id()
2339 	ret = i2c_smbus_xfer(adap, I2C_ADDR_DEVICE_ID, 0,  in i2c_get_device_id()
2384 static int i2c_default_probe(struct i2c_adapter *adap, unsigned short addr)  in i2c_default_probe()  argument
2390 	if (addr == 0x73 && (adap->class & I2C_CLASS_HWMON)  in i2c_default_probe()
2391 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE_DATA))  in i2c_default_probe()
2392 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2397 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK))  in i2c_default_probe()
2398 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_WRITE, 0,  in i2c_default_probe()
2400 	else if (i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE))  in i2c_default_probe()
2401 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2404 		dev_warn(&adap->dev, "No suitable probing method supported for address 0x%02X\n",  in i2c_default_probe()
2517 int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr)  in i2c_probe_func_quick_read()  argument
2519 	return i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_probe_func_quick_read()
2525 i2c_new_scanned_device(struct i2c_adapter *adap,  in i2c_new_scanned_device()  argument
2528 		       int (*probe)(struct i2c_adapter *adap, unsigned short addr))  in i2c_new_scanned_device()  argument
2538 			dev_warn(&adap->dev, "Invalid 7-bit address 0x%02x\n",  in i2c_new_scanned_device()
2544 		if (i2c_check_addr_busy(adap, addr_list[i])) {  in i2c_new_scanned_device()
2545 			dev_dbg(&adap->dev,  in i2c_new_scanned_device()
2552 		if (probe(adap, addr_list[i]))  in i2c_new_scanned_device()
2557 		dev_dbg(&adap->dev, "Probing failed, no device found\n");  in i2c_new_scanned_device()
2562 	return i2c_new_client_device(adap, info);  in i2c_new_scanned_device()
2586 void i2c_put_adapter(struct i2c_adapter *adap)  in i2c_put_adapter()  argument
2588 	if (!adap)  in i2c_put_adapter()
2591 	module_put(adap->owner);  in i2c_put_adapter()
2593 	put_device(&adap->dev);  in i2c_put_adapter()