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https://github.com/brain-hackers/u-boot-brain
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abcaa6ee2a
Some am33xx boards may not use the RTC block for bootcount (as it may not be wired up for the board) and use some other facility. So add another symbol for the bootcount driver for the IP block. Acked-by: Heiko Schocher <hs@denx.de> Signed-off-by: Tom Rini <trini@ti.com>
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
/*
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* (C) Copyright 2011
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* Heiko Schocher, DENX Software Engineering, hs@denx.de.
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*
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* A bootcount driver for the RTC IP block found on many TI platforms.
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* This requires the RTC clocks, etc, to be enabled prior to use and
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* not all boards with this IP block on it will have the RTC in use.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <bootcount.h>
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#include <asm/davinci_rtc.h>
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void bootcount_store(ulong a)
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{
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struct davinci_rtc *reg =
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(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
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/*
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* write RTC kick register to enable write
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* for RTC Scratch registers. Scratch0 and 1 are
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* used for bootcount values.
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*/
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writel(RTC_KICK0R_WE, ®->kick0r);
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writel(RTC_KICK1R_WE, ®->kick1r);
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raw_bootcount_store(®->scratch2,
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(BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff));
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}
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ulong bootcount_load(void)
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{
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unsigned long val;
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struct davinci_rtc *reg =
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(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
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val = raw_bootcount_load(®->scratch2);
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if ((val & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
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return 0;
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else
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return val & 0x0000ffff;
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}
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