diff options
| author | Chen-Yu Tsai <wens@csie.org> | 2015-08-25 10:49:19 +0800 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2015-08-31 08:43:42 +0200 |
| commit | 92369844ec7bf0e63de51e19b281fe3739e01397 (patch) | |
| tree | add7a1f64102a55f53b06877c2fb9f547e045bc6 /arch/arm/include/asm/arch-sunxi | |
| parent | 3537a0e8caa33ad4af354d5efc6be117b0728856 (diff) | |
sunxi: Enable non-secure access to RTC on sun6i (A31s)
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>
Diffstat (limited to 'arch/arm/include/asm/arch-sunxi')
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/tzpc.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/tzpc.h b/arch/arm/include/asm/arch-sunxi/tzpc.h new file mode 100644 index 0000000000..ba4d43bc3a --- /dev/null +++ b/arch/arm/include/asm/arch-sunxi/tzpc.h @@ -0,0 +1,23 @@ +/* + * (C) Copyright 2015 Chen-Yu Tsai <wens@csie.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _SUNXI_TZPC_H +#define _SUNXI_TZPC_H + +#ifndef __ASSEMBLY__ +struct sunxi_tzpc { + u32 r0size; /* 0x00 Size of secure RAM region */ + u32 decport0_status; /* 0x04 Status of decode protection port 0 */ + u32 decport0_set; /* 0x08 Set decode protection port 0 */ + u32 decport0_clear; /* 0x0c Clear decode protection port 0 */ +}; +#endif + +#define SUNXI_TZPC_DECPORT0_RTC (1 << 1) + +void tzpc_init(void); + +#endif /* _SUNXI_TZPC_H */ |