362600fe60
This patch adds support for the v3020 RTC from EM Microelectronic. The v3020 RTC is designed to be connected on a bus using only one data bit. Since any data bit may be used, it is necessary to specify this to the driver by passing a struct v3020_platform_data pointer (see include/linux/rtc-v3020.h) to the driver. Part of the following code comes from the kernel patchs produced by Compulab for their products. The original file (available here: http://raph.people.8d.com/misc/emv3020.c) was released under the terms of the GPL license. [akpm@osdl.org: cleanups] Signed-off-by: Raphael Assenat <raph@raphnet.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
35 lines
938 B
C
35 lines
938 B
C
/*
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* v3020.h - Registers definition and platform data structure for the v3020 RTC.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2006, 8D Technologies inc.
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*/
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#ifndef __LINUX_V3020_H
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#define __LINUX_V3020_H
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/* The v3020 has only one data pin but which one
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* is used depends on the board. */
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struct v3020_platform_data {
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int leftshift; /* (1<<(leftshift)) & readl() */
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};
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#define V3020_STATUS_0 0x00
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#define V3020_STATUS_1 0x01
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#define V3020_SECONDS 0x02
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#define V3020_MINUTES 0x03
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#define V3020_HOURS 0x04
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#define V3020_MONTH_DAY 0x05
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#define V3020_MONTH 0x06
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#define V3020_YEAR 0x07
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#define V3020_WEEK_DAY 0x08
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#define V3020_WEEK 0x09
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#define V3020_IS_COMMAND(val) ((val)>=0x0E)
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#define V3020_CMD_RAM2CLOCK 0x0E
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#define V3020_CMD_CLOCK2RAM 0x0F
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#endif /* __LINUX_V3020_H */
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