u-boot/arch/arm/cpu/armv7/sunxi/tzpc.c

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/*
* (C) Copyright 2015 Chen-Yu Tsai <wens@csie.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/tzpc.h>
/* Configure Trust Zone Protection Controller */
void tzpc_init(void)
{
struct sunxi_tzpc *tzpc = (struct sunxi_tzpc *)SUNXI_TZPC_BASE;
/* Enable non-secure access to the RTC */
writel(SUNXI_TZPC_DECPORT0_RTC, &tzpc->decport0_set);
}