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https://github.com/brain-hackers/u-boot-brain
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92369844ec
On the A31s the RTC is by default secured. Thus when u-boot loads the kernel in non-secure world, the RTC is unavailable. The SoC has a TrustZone Protection Controller, which can be used to enable non-secure access to the RTC. On the A31 the TZPC doesn't seem to do anything, i.e. changes to its register contents do not affect access to the RTC. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
19 lines
411 B
C
19 lines
411 B
C
/*
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* (C) Copyright 2015 Chen-Yu Tsai <wens@csie.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <asm/io.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/tzpc.h>
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/* Configure Trust Zone Protection Controller */
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void tzpc_init(void)
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{
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struct sunxi_tzpc *tzpc = (struct sunxi_tzpc *)SUNXI_TZPC_BASE;
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/* Enable non-secure access to the RTC */
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writel(SUNXI_TZPC_DECPORT0_RTC, &tzpc->decport0_set);
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}
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