2566c5264a
To cut off the power we need to start the shutdown sequence by writing the OFF bit on PMIC. Once the PMIC is programmed the SoC needs to toggle the PMIC_PWR_ENABLE pin when it is ready for the PMIC to cut off the power. This is done by triggering the ALARM2 interrupt on SoC RTC. The RTC driver only works in power management mode which means it won't provide any kind of time keeping functionality. It only implements a way to trigger the ALARM2 interrupt when requested. Differential Revision: https://reviews.freebsd.org/D1489 Reviewed by: rpaulo MFC after: 2 weeks
77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
/*-
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* Copyright 2015 Luiz Otavio O Souza <loos@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _AM335X_RTCREG_H_
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#define _AM335X_RTCREG_H_
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#define RTC_SECONDS 0x00
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#define RTC_MINUTES 0x04
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#define RTC_HOURS 0x08
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#define RTC_DAYS 0x0c
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#define RTC_MONTHS 0x10
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#define RTC_YEARS 0x14
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#define RTC_WEEK 0x18
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#define RTC_CTRL 0x40
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#define RTC_CTRL_DISABLE (1U << 6)
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#define RTC_CTRL_RUN (1U << 0)
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#define RTC_STATUS 0x44
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#define RTC_STATUS_ALARM2 (1U << 7)
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#define RTC_STATUS_ALARM (1U << 6)
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#define RTC_STATUS_1D_EVENT (1U << 5)
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#define RTC_STATUS_1H_EVENT (1U << 4)
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#define RTC_STATUS_1M_EVENT (1U << 3)
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#define RTC_STATUS_1S_EVENT (1U << 2)
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#define RTC_STATUS_RUN (1U << 1)
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#define RTC_STATUS_BUSY (1U << 0)
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#define RTC_INTR 0x48
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#define RTC_INTR_ALARM2 (1U << 4)
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#define RTC_INTR_ALARM (1U << 3)
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#define RTC_INTR_TIMER (1U << 2)
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#define RTC_OSC 0x54
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#define RTC_OSC_32KCLK_EN (1U << 6)
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#define RTC_OSC_OSC32K_GZ (1U << 4)
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#define RTC_OSC_32KCLK_SEL (1U << 3)
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#define RTC_OSC_RES_SELECT (1U << 2)
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#define RTC_OSC_SW2 (1U << 1)
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#define RTC_OSC_SW1 (1U << 0)
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#define RTC_KICK0R 0x6c
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#define RTC_KICK0R_PASS 0x83e70b13
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#define RTC_KICK1R 0x70
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#define RTC_KICK1R_PASS 0x95a4f1e0
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#define RTC_REVISION 0x74
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#define RTC_ALARM2_SECONDS 0x80
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#define RTC_ALARM2_MINUTES 0x84
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#define RTC_ALARM2_HOURS 0x88
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#define RTC_ALARM2_DAYS 0x8c
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#define RTC_ALARM2_MONTHS 0x90
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#define RTC_ALARM2_YEARS 0x94
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#define RTC_PMIC 0x98
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#define PMIC_PWR_ENABLE (1U << 16)
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#endif /* _AM335X_RTCREG_H_ */
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