3  * RTC client/driver for the Maxim/Dallas DS1374 Real-Time Clock over I2C
69 	struct i2c_client *client;  member
85 static int ds1374_read_rtc(struct i2c_client *client, u32 *time,  in ds1374_read_rtc()  argument
95 	ret = i2c_smbus_read_i2c_block_data(client, reg, nbytes, buf);  in ds1374_read_rtc()
108 static int ds1374_write_rtc(struct i2c_client *client, u32 time,  in ds1374_write_rtc()  argument
124 	return i2c_smbus_write_i2c_block_data(client, reg, nbytes, buf);  in ds1374_write_rtc()
127 static int ds1374_check_rtc_status(struct i2c_client *client)  in ds1374_check_rtc_status()  argument
132 	stat = i2c_smbus_read_byte_data(client, DS1374_REG_SR);  in ds1374_check_rtc_status()
137 		dev_warn(&client->dev,  in ds1374_check_rtc_status()
142 	ret = i2c_smbus_write_byte_data(client, DS1374_REG_SR, stat);  in ds1374_check_rtc_status()
151 	control = i2c_smbus_read_byte_data(client, DS1374_REG_CR);  in ds1374_check_rtc_status()
156 	return i2c_smbus_write_byte_data(client, DS1374_REG_CR, control);  in ds1374_check_rtc_status()
161 	struct i2c_client *client = to_i2c_client(dev);  in ds1374_read_time()  local
165 	ret = ds1374_read_rtc(client, &itime, DS1374_REG_TOD0, 4);  in ds1374_read_time()
174 	struct i2c_client *client = to_i2c_client(dev);  in ds1374_set_time()  local
177 	return ds1374_write_rtc(client, itime, DS1374_REG_TOD0, 4);  in ds1374_set_time()
187 	struct i2c_client *client = to_i2c_client(dev);  in ds1374_read_alarm()  local
188 	struct ds1374 *ds1374 = i2c_get_clientdata(client);  in ds1374_read_alarm()
193 	if (client->irq <= 0)  in ds1374_read_alarm()
198 	cr = ret = i2c_smbus_read_byte_data(client, DS1374_REG_CR);  in ds1374_read_alarm()
202 	sr = ret = i2c_smbus_read_byte_data(client, DS1374_REG_SR);  in ds1374_read_alarm()
206 	ret = ds1374_read_rtc(client, &now, DS1374_REG_TOD0, 4);  in ds1374_read_alarm()
210 	ret = ds1374_read_rtc(client, &cur_alarm, DS1374_REG_WDALM0, 3);  in ds1374_read_alarm()
225 	struct i2c_client *client = to_i2c_client(dev);  in ds1374_set_alarm()  local
226 	struct ds1374 *ds1374 = i2c_get_clientdata(client);  in ds1374_set_alarm()
232 	if (client->irq <= 0)  in ds1374_set_alarm()
255 	ret = cr = i2c_smbus_read_byte_data(client, DS1374_REG_CR);  in ds1374_set_alarm()
263 	ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, cr);  in ds1374_set_alarm()
267 	ret = ds1374_write_rtc(client, new_alarm, DS1374_REG_WDALM0, 3);  in ds1374_set_alarm()
275 		ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, cr);  in ds1374_set_alarm()
286 	struct i2c_client *client = dev_id;  in ds1374_irq()  local
287 	struct ds1374 *ds1374 = i2c_get_clientdata(client);  in ds1374_irq()
297 	struct i2c_client *client = ds1374->client;  in ds1374_work()  local
302 	stat = i2c_smbus_read_byte_data(client, DS1374_REG_SR);  in ds1374_work()
308 		i2c_smbus_write_byte_data(client, DS1374_REG_SR, stat);  in ds1374_work()
310 		control = i2c_smbus_read_byte_data(client, DS1374_REG_CR);  in ds1374_work()
315 		i2c_smbus_write_byte_data(client, DS1374_REG_CR, control);  in ds1374_work()
322 		enable_irq(client->irq);  in ds1374_work()
330 	struct i2c_client *client = to_i2c_client(dev);  in ds1374_alarm_irq_enable()  local
331 	struct ds1374 *ds1374 = i2c_get_clientdata(client);  in ds1374_alarm_irq_enable()
336 	ret = i2c_smbus_read_byte_data(client, DS1374_REG_CR);  in ds1374_alarm_irq_enable()
346 	ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, ret);  in ds1374_alarm_irq_enable()
395 	struct i2c_client *client = ds1374->client;  in ds1374_wdt_settimeout()  local
400 	cr = i2c_smbus_read_byte_data(client, DS1374_REG_CR);  in ds1374_wdt_settimeout()
407 	ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, cr);  in ds1374_wdt_settimeout()
413 	ret = ds1374_write_rtc(client, timeout, DS1374_REG_WDALM0, 3);  in ds1374_wdt_settimeout()
422 	ret = i2c_smbus_write_byte_data(client, DS1374_REG_CR, cr);  in ds1374_wdt_settimeout()
437 	return ds1374_read_rtc(ds1374->client, &val, DS1374_REG_WDALM0, 3);  in ds1374_wdt_start()
443 	struct i2c_client *client = ds1374->client;  in ds1374_wdt_stop()  local
446 	cr = i2c_smbus_read_byte_data(client, DS1374_REG_CR);  in ds1374_wdt_stop()
453 	return i2c_smbus_write_byte_data(client, DS1374_REG_CR, cr);  in ds1374_wdt_stop()
470 static int ds1374_probe(struct i2c_client *client)  in ds1374_probe()  argument
475 	ds1374 = devm_kzalloc(&client->dev, sizeof(struct ds1374), GFP_KERNEL);  in ds1374_probe()
479 	ds1374->rtc = devm_rtc_allocate_device(&client->dev);  in ds1374_probe()
483 	ds1374->client = client;  in ds1374_probe()
484 	i2c_set_clientdata(client, ds1374);  in ds1374_probe()
489 	ret = ds1374_check_rtc_status(client);  in ds1374_probe()
493 	if (client->irq > 0) {  in ds1374_probe()
494 		ret = devm_request_irq(&client->dev, client->irq, ds1374_irq, 0,  in ds1374_probe()
495 					"ds1374", client);  in ds1374_probe()
497 			dev_err(&client->dev, "unable to request IRQ\n");  in ds1374_probe()
501 		device_set_wakeup_capable(&client->dev, 1);  in ds1374_probe()
518 	watchdog_init_timeout(&ds1374->wdt, wdt_margin, &client->dev);  in ds1374_probe()
525 	ret = devm_watchdog_register_device(&client->dev, &ds1374->wdt);  in ds1374_probe()
533 static void ds1374_remove(struct i2c_client *client)  in ds1374_remove()  argument
535 	struct ds1374 *ds1374 = i2c_get_clientdata(client);  in ds1374_remove()
537 	if (client->irq > 0) {  in ds1374_remove()
542 		devm_free_irq(&client->dev, client->irq, client);  in ds1374_remove()
550 	struct i2c_client *client = to_i2c_client(dev);  in ds1374_suspend()  local
552 	if (client->irq > 0 && device_may_wakeup(&client->dev))  in ds1374_suspend()
553 		enable_irq_wake(client->irq);  in ds1374_suspend()
559 	struct i2c_client *client = to_i2c_client(dev);  in ds1374_resume()  local
561 	if (client->irq > 0 && device_may_wakeup(&client->dev))  in ds1374_resume()
562 		disable_irq_wake(client->irq);  in ds1374_resume()