1 // SPDX-License-Identifier: GPL-2.0-or-later
4  * e-book readers designed by the original design manufacturer Netronix, Inc.
5  * It contains RTC, battery monitoring, system power management, and PWM
22 	struct ntxec *ec;  member
43 	res = regmap_read(rtc->ec->regmap, NTXEC_REG_READ_MINUTE_SECOND, &value);  in ntxec_read_time()
47 	tm->tm_min = value >> 8;  in ntxec_read_time()
48 	tm->tm_sec = value & 0xff;  in ntxec_read_time()
50 	res = regmap_read(rtc->ec->regmap, NTXEC_REG_READ_MDAY_HOUR, &value);  in ntxec_read_time()
54 	tm->tm_mday = value >> 8;  in ntxec_read_time()
55 	tm->tm_hour = value & 0xff;  in ntxec_read_time()
57 	res = regmap_read(rtc->ec->regmap, NTXEC_REG_READ_YEAR_MONTH, &value);  in ntxec_read_time()
61 	tm->tm_year = (value >> 8) + 100;  in ntxec_read_time()
62 	tm->tm_mon = (value & 0xff) - 1;  in ntxec_read_time()
69 	res = regmap_read(rtc->ec->regmap, NTXEC_REG_READ_MINUTE_SECOND, &value);  in ntxec_read_time()
73 	if (tm->tm_min != value >> 8 || tm->tm_sec != (value & 0xff))  in ntxec_read_time()
92 		{ NTXEC_REG_WRITE_YEAR, ntxec_reg8(tm->tm_year - 100) },  in ntxec_set_time()
93 		{ NTXEC_REG_WRITE_MONTH, ntxec_reg8(tm->tm_mon + 1) },  in ntxec_set_time()
94 		{ NTXEC_REG_WRITE_DAY, ntxec_reg8(tm->tm_mday) },  in ntxec_set_time()
95 		{ NTXEC_REG_WRITE_HOUR, ntxec_reg8(tm->tm_hour) },  in ntxec_set_time()
96 		{ NTXEC_REG_WRITE_MINUTE, ntxec_reg8(tm->tm_min) },  in ntxec_set_time()
97 		{ NTXEC_REG_WRITE_SECOND, ntxec_reg8(tm->tm_sec) },  in ntxec_set_time()
100 	return regmap_multi_reg_write(rtc->ec->regmap, regs, ARRAY_SIZE(regs));  in ntxec_set_time()
113 	pdev->dev.of_node = pdev->dev.parent->of_node;  in ntxec_rtc_probe()
115 	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);  in ntxec_rtc_probe()
117 		return -ENOMEM;  in ntxec_rtc_probe()
119 	rtc->dev = &pdev->dev;  in ntxec_rtc_probe()
120 	rtc->ec = dev_get_drvdata(pdev->dev.parent);  in ntxec_rtc_probe()
123 	dev = devm_rtc_allocate_device(&pdev->dev);  in ntxec_rtc_probe()
127 	dev->ops = &ntxec_rtc_ops;  in ntxec_rtc_probe()
128 	dev->range_min = RTC_TIMESTAMP_BEGIN_2000;  in ntxec_rtc_probe()
129 	dev->range_max = 9025257599LL; /* 2255-12-31 23:59:59 */  in ntxec_rtc_probe()
136 		.name = "ntxec-rtc",
143 MODULE_DESCRIPTION("RTC driver for Netronix EC");
145 MODULE_ALIAS("platform:ntxec-rtc");