1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2007-2009 ST-Ericsson AB
21  * Bit 0: RTC Monitor cleared=0, active=1, if you set it
23  * Bit 1: 32 kHz Oscillator, 0 = on, 1 = bypass
24  * Bit 2: Alarm on, 0 = off, 1 = on
25  * Bit 3: 32 kHz buffer disabling, 0 = enabled, 1 = disabled
30 /* Alarm when AL0-AL3 == TI0-TI3  */
35 /* This 48-bit register that counts up at 32768 Hz */
60 	buf[5] = (hw_counter >> 40) & 0xFF;  in ab3100_rtc_set_time()
89 		return -EINVAL;  in ab3100_rtc_read_time()
101 		hw_counter = ((u64) buf[5] << 40) | ((u64) buf[4] << 32) |  in ab3100_rtc_read_time()
126 		alarm->enabled = 1;  in ab3100_rtc_read_alarm()
128 		alarm->enabled = 0;  in ab3100_rtc_read_alarm()
130 	alarm->pending = 0;  in ab3100_rtc_read_alarm()
136 	hw_counter = ((u64) buf[3] << 40) | ((u64) buf[2] << 32) |  in ab3100_rtc_read_alarm()
140 	rtc_time64_to_tm(time, &alarm->time);  in ab3100_rtc_read_alarm()
142 	return rtc_valid_tm(&alarm->time);  in ab3100_rtc_read_alarm()
154 	secs = rtc_tm_to_time64(&alarm->time);  in ab3100_rtc_set_alarm()
159 	buf[3] = (hw_counter >> 40) & 0xFF;  in ab3100_rtc_set_alarm()
171 							  alarm->enabled << 2);  in ab3100_rtc_set_alarm()
208 	err = abx500_get_register_interruptible(&pdev->dev, 0,  in ab3100_rtc_probe()
211 		dev_err(&pdev->dev, "unable to read RTC register\n");  in ab3100_rtc_probe()
212 		return -ENODEV;  in ab3100_rtc_probe()
216 		dev_warn(&pdev->dev, "not default value in RTC reg 0x%x\n",  in ab3100_rtc_probe()
222 		 * Set bit to detect power loss.  in ab3100_rtc_probe()
223 		 * This bit remains until RTC power is lost.  in ab3100_rtc_probe()
226 		err = abx500_set_register_interruptible(&pdev->dev, 0,  in ab3100_rtc_probe()
231 	rtc = devm_rtc_allocate_device(&pdev->dev);  in ab3100_rtc_probe()
235 	rtc->ops = &ab3100_rtc_ops;  in ab3100_rtc_probe()
236 	/* 48bit counter at (AB3100_RTC_CLOCK_RATE * 2) */  in ab3100_rtc_probe()
237 	rtc->range_max = U32_MAX;  in ab3100_rtc_probe()
246 		.name = "ab3100-rtc",