96615841e1
The v3020 RTC can be connected to GPIOs as well as to memory-like interface. Add ability to use GPIO bit-bang for v3020 read-write access. [akpm@linux-foundation.org: fix off-by-one in error path] Signed-off-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
42 lines
1 KiB
C
42 lines
1 KiB
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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int use_gpio:1;
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unsigned int gpio_cs;
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unsigned int gpio_wr;
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unsigned int gpio_rd;
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unsigned int gpio_io;
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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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