3  * RTC driver for the Micro Crystal RV3028
110 	struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent);  in timestamp0_store()  local
112 	regmap_update_bits(rv3028->regmap, RV3028_EVT_CTRL, RV3028_EVT_CTRL_TSR,  in timestamp0_store()
121 	struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent);  in timestamp0_show()  local
127 	ret = regmap_read(rv3028->regmap, RV3028_TS_COUNT, &count);  in timestamp0_show()
134 	ret = regmap_bulk_read(rv3028->regmap, RV3028_TS_SEC, date,  in timestamp0_show()
159 	struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent);  in timestamp0_count_show()  local
163 	ret = regmap_read(rv3028->regmap, RV3028_TS_COUNT, &count);  in timestamp0_count_show()
182 static int rv3028_exit_eerd(struct rv3028_data *rv3028, u32 eerd)  in rv3028_exit_eerd()  argument
187 	return regmap_update_bits(rv3028->regmap, RV3028_CTRL1, RV3028_CTRL1_EERD, 0);  in rv3028_exit_eerd()
190 static int rv3028_enter_eerd(struct rv3028_data *rv3028, u32 *eerd)  in rv3028_enter_eerd()  argument
195 	ret = regmap_read(rv3028->regmap, RV3028_CTRL1, &ctrl1);  in rv3028_enter_eerd()
203 	ret = regmap_update_bits(rv3028->regmap, RV3028_CTRL1,  in rv3028_enter_eerd()
208 	ret = regmap_read_poll_timeout(rv3028->regmap, RV3028_STATUS, status,  in rv3028_enter_eerd()
212 		rv3028_exit_eerd(rv3028, *eerd);  in rv3028_enter_eerd()
220 static int rv3028_update_eeprom(struct rv3028_data *rv3028, u32 eerd)  in rv3028_update_eeprom()  argument
225 	ret = regmap_write(rv3028->regmap, RV3028_EEPROM_CMD, 0x0);  in rv3028_update_eeprom()
229 	ret = regmap_write(rv3028->regmap, RV3028_EEPROM_CMD, RV3028_EEPROM_CMD_UPDATE);  in rv3028_update_eeprom()
235 	ret = regmap_read_poll_timeout(rv3028->regmap, RV3028_STATUS, status,  in rv3028_update_eeprom()
240 	rv3028_exit_eerd(rv3028, eerd);  in rv3028_update_eeprom()
245 static int rv3028_update_cfg(struct rv3028_data *rv3028, unsigned int reg,  in rv3028_update_cfg()  argument
251 	ret = rv3028_enter_eerd(rv3028, &eerd);  in rv3028_update_cfg()
255 	ret = regmap_update_bits(rv3028->regmap, reg, mask, val);  in rv3028_update_cfg()
257 		rv3028_exit_eerd(rv3028, eerd);  in rv3028_update_cfg()
261 	return rv3028_update_eeprom(rv3028, eerd);  in rv3028_update_cfg()
266 	struct rv3028_data *rv3028 = dev_id;  in rv3028_handle_irq()  local
270 	if (regmap_read(rv3028->regmap, RV3028_STATUS, &status) < 0 ||  in rv3028_handle_irq()
296 		rtc_update_irq(rv3028->rtc, 1, events);  in rv3028_handle_irq()
297 		regmap_update_bits(rv3028->regmap, RV3028_STATUS, status, 0);  in rv3028_handle_irq()
298 		regmap_update_bits(rv3028->regmap, RV3028_CTRL2, ctrl, 0);  in rv3028_handle_irq()
302 		sysfs_notify(&rv3028->rtc->dev.kobj, NULL,  in rv3028_handle_irq()
304 		dev_warn(&rv3028->rtc->dev, "event detected");  in rv3028_handle_irq()
312 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_get_time()  local
316 	ret = regmap_read(rv3028->regmap, RV3028_STATUS, &status);  in rv3028_get_time()
323 	ret = regmap_bulk_read(rv3028->regmap, RV3028_SEC, date, sizeof(date));  in rv3028_get_time()
340 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_set_time()  local
356 	ret = regmap_bulk_write(rv3028->regmap, RV3028_SEC, date,  in rv3028_set_time()
361 	ret = regmap_update_bits(rv3028->regmap, RV3028_STATUS,  in rv3028_set_time()
369 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_get_alarm()  local
373 	ret = regmap_bulk_read(rv3028->regmap, RV3028_ALARM_MIN, alarmvals,  in rv3028_get_alarm()
378 	ret = regmap_read(rv3028->regmap, RV3028_STATUS, &status);  in rv3028_get_alarm()
382 	ret = regmap_read(rv3028->regmap, RV3028_CTRL2, &ctrl);  in rv3028_get_alarm()
399 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_set_alarm()  local
412 	ret = regmap_update_bits(rv3028->regmap, RV3028_CTRL2,  in rv3028_set_alarm()
421 	ret = regmap_update_bits(rv3028->regmap, RV3028_STATUS,  in rv3028_set_alarm()
426 	ret = regmap_bulk_write(rv3028->regmap, RV3028_ALARM_MIN, alarmvals,  in rv3028_set_alarm()
432 		if (rv3028->rtc->uie_rtctimer.enabled)  in rv3028_set_alarm()
434 		if (rv3028->rtc->aie_timer.enabled)  in rv3028_set_alarm()
438 	ret = regmap_update_bits(rv3028->regmap, RV3028_CTRL2,  in rv3028_set_alarm()
446 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_alarm_irq_enable()  local
450 		if (rv3028->rtc->uie_rtctimer.enabled)  in rv3028_alarm_irq_enable()
452 		if (rv3028->rtc->aie_timer.enabled)  in rv3028_alarm_irq_enable()
456 	ret = regmap_update_bits(rv3028->regmap, RV3028_STATUS,  in rv3028_alarm_irq_enable()
461 	ret = regmap_update_bits(rv3028->regmap, RV3028_CTRL2,  in rv3028_alarm_irq_enable()
471 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_read_offset()  local
474 	ret = regmap_read(rv3028->regmap, RV3028_OFFSET, &value);  in rv3028_read_offset()
480 	ret = regmap_read(rv3028->regmap, RV3028_BACKUP, &value);  in rv3028_read_offset()
493 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_set_offset()  local
500 	ret = rv3028_enter_eerd(rv3028, &eerd);  in rv3028_set_offset()
504 	ret = regmap_write(rv3028->regmap, RV3028_OFFSET, offset >> 1);  in rv3028_set_offset()
508 	ret = regmap_update_bits(rv3028->regmap, RV3028_BACKUP, BIT(7),  in rv3028_set_offset()
513 	return rv3028_update_eeprom(rv3028, eerd);  in rv3028_set_offset()
516 	rv3028_exit_eerd(rv3028, eerd);  in rv3028_set_offset()
524 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_param_get()  local
530 		ret = regmap_read(rv3028->regmap, RV3028_BACKUP, &value);  in rv3028_param_get()
557 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_param_set()  local
576 		return rv3028_update_cfg(rv3028, RV3028_BACKUP, RV3028_BACKUP_BSM,  in rv3028_param_set()
588 	struct rv3028_data *rv3028 = dev_get_drvdata(dev);  in rv3028_ioctl()  local
593 		ret = regmap_read(rv3028->regmap, RV3028_STATUS, &status);  in rv3028_ioctl()
620 	struct rv3028_data *rv3028 = priv;  in rv3028_eeprom_write()  local
625 	ret = rv3028_enter_eerd(rv3028, &eerd);  in rv3028_eeprom_write()
630 		ret = regmap_write(rv3028->regmap, RV3028_EEPROM_ADDR, offset + i);  in rv3028_eeprom_write()
634 		ret = regmap_write(rv3028->regmap, RV3028_EEPROM_DATA, buf[i]);  in rv3028_eeprom_write()
638 		ret = regmap_write(rv3028->regmap, RV3028_EEPROM_CMD, 0x0);  in rv3028_eeprom_write()
642 		ret = regmap_write(rv3028->regmap, RV3028_EEPROM_CMD,  in rv3028_eeprom_write()
649 		ret = regmap_read_poll_timeout(rv3028->regmap, RV3028_STATUS, status,  in rv3028_eeprom_write()
658 	rv3028_exit_eerd(rv3028, eerd);  in rv3028_eeprom_write()
666 	struct rv3028_data *rv3028 = priv;  in rv3028_eeprom_read()  local
671 	ret = rv3028_enter_eerd(rv3028, &eerd);  in rv3028_eeprom_read()
676 		ret = regmap_write(rv3028->regmap, RV3028_EEPROM_ADDR, offset + i);  in rv3028_eeprom_read()
680 		ret = regmap_write(rv3028->regmap, RV3028_EEPROM_CMD, 0x0);  in rv3028_eeprom_read()
684 		ret = regmap_write(rv3028->regmap, RV3028_EEPROM_CMD,  in rv3028_eeprom_read()
689 		ret = regmap_read_poll_timeout(rv3028->regmap, RV3028_STATUS, status,  in rv3028_eeprom_read()
696 		ret = regmap_read(rv3028->regmap, RV3028_EEPROM_DATA, &data);  in rv3028_eeprom_read()
703 	rv3028_exit_eerd(rv3028, eerd);  in rv3028_eeprom_read()
724 	struct rv3028_data *rv3028 = clkout_hw_to_rv3028(hw);  in rv3028_clkout_recalc_rate()  local
726 	ret = regmap_read(rv3028->regmap, RV3028_CLKOUT, &clkout);  in rv3028_clkout_recalc_rate()
751 	struct rv3028_data *rv3028 = clkout_hw_to_rv3028(hw);  in rv3028_clkout_set_rate()  local
753 	ret = regmap_read(rv3028->regmap, RV3028_CLKOUT, &enabled);  in rv3028_clkout_set_rate()
757 	ret = regmap_write(rv3028->regmap, RV3028_CLKOUT, 0x0);  in rv3028_clkout_set_rate()
765 			return rv3028_update_cfg(rv3028, RV3028_CLKOUT, 0xff,  in rv3028_clkout_set_rate()
773 	struct rv3028_data *rv3028 = clkout_hw_to_rv3028(hw);  in rv3028_clkout_prepare()  local
775 	return regmap_write(rv3028->regmap, RV3028_CLKOUT,  in rv3028_clkout_prepare()
781 	struct rv3028_data *rv3028 = clkout_hw_to_rv3028(hw);  in rv3028_clkout_unprepare()  local
783 	regmap_write(rv3028->regmap, RV3028_CLKOUT, 0x0);  in rv3028_clkout_unprepare()
784 	regmap_update_bits(rv3028->regmap, RV3028_STATUS,  in rv3028_clkout_unprepare()
791 	struct rv3028_data *rv3028 = clkout_hw_to_rv3028(hw);  in rv3028_clkout_is_prepared()  local
793 	ret = regmap_read(rv3028->regmap, RV3028_CLKOUT, &clkout);  in rv3028_clkout_is_prepared()
809 static int rv3028_clkout_register_clk(struct rv3028_data *rv3028,  in rv3028_clkout_register_clk()  argument
817 	ret = regmap_update_bits(rv3028->regmap, RV3028_STATUS,  in rv3028_clkout_register_clk()
822 	init.name = "rv3028-clkout";  in rv3028_clkout_register_clk()
827 	rv3028->clkout_hw.init = &init;  in rv3028_clkout_register_clk()
833 	clk = devm_clk_register(&client->dev, &rv3028->clkout_hw);  in rv3028_clkout_register_clk()
860 static u8 rv3028_set_trickle_charger(struct rv3028_data *rv3028,  in rv3028_set_trickle_charger()  argument
866 	ret = regmap_read(rv3028->regmap, RV3028_BACKUP, &val_old);  in rv3028_set_trickle_charger()
909 		ret = rv3028_update_cfg(rv3028, RV3028_BACKUP, RV3028_BACKUP_TCE |  in rv3028_set_trickle_charger()
920 	struct rv3028_data *rv3028;  in rv3028_probe()  local
941 	rv3028 = devm_kzalloc(&client->dev, sizeof(struct rv3028_data),  in rv3028_probe()
943 	if (!rv3028)  in rv3028_probe()
946 	rv3028->regmap = devm_regmap_init_i2c(client, &regmap_config);  in rv3028_probe()
947 	if (IS_ERR(rv3028->regmap))  in rv3028_probe()
948 		return PTR_ERR(rv3028->regmap);  in rv3028_probe()
950 	i2c_set_clientdata(client, rv3028);  in rv3028_probe()
952 	ret = regmap_read(rv3028->regmap, RV3028_STATUS, &status);  in rv3028_probe()
959 	rv3028->rtc = devm_rtc_allocate_device(&client->dev);  in rv3028_probe()
960 	if (IS_ERR(rv3028->rtc))  in rv3028_probe()
961 		return PTR_ERR(rv3028->rtc);  in rv3028_probe()
978 						"rv3028", rv3028);  in rv3028_probe()
985 		clear_bit(RTC_FEATURE_ALARM, rv3028->rtc->features);  in rv3028_probe()
987 	ret = regmap_update_bits(rv3028->regmap, RV3028_CTRL1,  in rv3028_probe()
993 	ret = regmap_update_bits(rv3028->regmap, RV3028_CTRL2,  in rv3028_probe()
999 	ret = rv3028_set_trickle_charger(rv3028, client);  in rv3028_probe()
1003 	ret = rtc_add_group(rv3028->rtc, &rv3028_attr_group);  in rv3028_probe()
1007 	set_bit(RTC_FEATURE_BACKUP_SWITCH_MODE, rv3028->rtc->features);  in rv3028_probe()
1009 	rv3028->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;  in rv3028_probe()
1010 	rv3028->rtc->range_max = RTC_TIMESTAMP_END_2099;  in rv3028_probe()
1011 	rv3028->rtc->ops = &rv3028_rtc_ops;  in rv3028_probe()
1012 	ret = devm_rtc_register_device(rv3028->rtc);  in rv3028_probe()
1016 	nvmem_cfg.priv = rv3028->regmap;  in rv3028_probe()
1017 	devm_rtc_nvmem_register(rv3028->rtc, &nvmem_cfg);  in rv3028_probe()
1018 	eeprom_cfg.priv = rv3028;  in rv3028_probe()
1019 	devm_rtc_nvmem_register(rv3028->rtc, &eeprom_cfg);  in rv3028_probe()
1021 	rv3028->rtc->max_user_freq = 1;  in rv3028_probe()
1024 	rv3028_clkout_register_clk(rv3028, client);  in rv3028_probe()
1036 	{ .compatible = "microcrystal,rv3028", },
1042 	{ .name = "rv3028", },
1049 		.name = "rtc-rv3028",
1059 MODULE_DESCRIPTION("Micro Crystal RV3028 RTC driver");