[thirdparty/u-boot.git] / drivers / bootcount / bootcount_davinci.c

/*
 * (C) Copyright 2011
 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <bootcount.h>
#include <asm/arch/da850_lowlevel.h>
#include <asm/arch/davinci_misc.h>

void bootcount_store(ulong a)
{
	struct davinci_rtc *reg =
		(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;

	/*
	 * write RTC kick register to enable write
	 * for RTC Scratch registers. Scratch0 and 1 are
	 * used for bootcount values.
	 */
	writel(RTC_KICK0R_WE, &reg->kick0r);
	writel(RTC_KICK1R_WE, &reg->kick1r);
	raw_bootcount_store(&reg->scratch0, a);
	raw_bootcount_store(&reg->scratch1, BOOTCOUNT_MAGIC);
}

ulong bootcount_load(void)
{
	struct davinci_rtc *reg =
		(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;

	if (raw_bootcount_load(&reg->scratch1) != BOOTCOUNT_MAGIC)
		return 0;
	else
		return raw_bootcount_load(&reg->scratch0);
}
Commit	Line	Data
0044c42e SR	1	/*
	2	* (C) Copyright 2011
	3	* Heiko Schocher, DENX Software Engineering, hs@denx.de.
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
0044c42e SR	6	*/
	7
	8	#include <bootcount.h>
	9	#include <asm/arch/da850_lowlevel.h>
	10	#include <asm/arch/davinci_misc.h>
	11
	12	void bootcount_store(ulong a)
	13	{
	14	struct davinci_rtc *reg =
	15	(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
	16
	17	/*
	18	* write RTC kick register to enable write
	19	* for RTC Scratch registers. Scratch0 and 1 are
	20	* used for bootcount values.
	21	*/
	22	writel(RTC_KICK0R_WE, &reg->kick0r);
	23	writel(RTC_KICK1R_WE, &reg->kick1r);
	24	raw_bootcount_store(&reg->scratch0, a);
	25	raw_bootcount_store(&reg->scratch1, BOOTCOUNT_MAGIC);
	26	}
	27
	28	ulong bootcount_load(void)
	29	{
	30	struct davinci_rtc *reg =
	31	(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
	32
	33	if (raw_bootcount_load(&reg->scratch1) != BOOTCOUNT_MAGIC)
	34	return 0;
	35	else
	36	return raw_bootcount_load(&reg->scratch0);
	37	}