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This driver is based on the driver for the M41T11. In the intended application, the RTC will be powered by a large capacitor, rather than a battery. The driver therefore checks to see whether the RTC has lost power. The chip's OUT bit is normally reset from its power-up state. If the OUT bit is read as set, or if the date and time are not valid, then the RTC is assumed to have lost power, and its date and time are reset to 1900-01-01 00:00:00. Support for adjusting the speed of the clock to improve accuracy is provided through an environment variable. Signed-off-by: Larry Johnson <lrj@acm.org>
72 lines
1.8 KiB
Makefile
72 lines
1.8 KiB
Makefile
#
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# (C) Copyright 2001-2006
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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include $(TOPDIR)/config.mk
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#CFLAGS += -DDEBUG
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LIB = $(obj)librtc.a
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COBJS-y += date.o
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COBJS-y += bf5xx_rtc.o
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COBJS-y += ds12887.o
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COBJS-y += ds1302.o
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COBJS-y += ds1306.o
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COBJS-y += ds1307.o
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COBJS-y += ds1337.o
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COBJS-y += ds1374.o
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COBJS-y += ds1556.o
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COBJS-y += ds164x.o
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COBJS-y += ds174x.o
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COBJS-y += ds3231.o
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COBJS-y += m41t11.o
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COBJS-y += m41t60.o
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COBJS-y += max6900.o
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COBJS-y += m48t35ax.o
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COBJS-y += mc146818.o
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COBJS-y += mk48t59.o
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COBJS-y += mpc5xxx.o
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COBJS-y += mpc8xx.o
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COBJS-y += pcf8563.o
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COBJS-y += s3c24x0_rtc.o
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COBJS-y += rs5c372.o
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COBJS-y += mcfrtc.o
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COBJS-y += x1205.o
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COBJS := $(COBJS-y)
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SRCS := $(COBJS:.o=.c)
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OBJS := $(addprefix $(obj),$(COBJS))
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all: $(LIB)
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$(LIB): $(obj).depend $(OBJS)
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$(AR) $(ARFLAGS) $@ $(OBJS)
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#########################################################################
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# defines $(obj).depend target
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include $(SRCTREE)/rules.mk
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sinclude $(obj).depend
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#########################################################################
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