diff options
author | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2015-02-20 17:04:13 +0900 |
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committer | Tom Rini <trini@ti.com> | 2015-02-21 08:23:52 -0500 |
commit | af9308276028924ff7f84770ddbd26bd7046d6c5 (patch) | |
tree | 55f2467ec5635acc83c97a92df33036f414d9f1f /arch/arm/mach-at91/include/mach/at91_gpbr.h | |
parent | 0e7368c6c4265c138293802b3315629338bc66d0 (diff) |
ARM: at91: move SoC headers to mach-at91/include/mach
Move arch/arm/include/asm/arch-at91/*
-> arch/arm/mach-at91/include/mach/*
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'arch/arm/mach-at91/include/mach/at91_gpbr.h')
-rw-r--r-- | arch/arm/mach-at91/include/mach/at91_gpbr.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/include/mach/at91_gpbr.h b/arch/arm/mach-at91/include/mach/at91_gpbr.h new file mode 100644 index 0000000000..e781481e88 --- /dev/null +++ b/arch/arm/mach-at91/include/mach/at91_gpbr.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2010 + * Reinhard Meyer, reinhard.meyer@emk-elektronik.de + * + * General Purpose Backup Registers + * Based on AT91SAM9XE datasheet + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef AT91_GPBR_H +#define AT91_GPBR_H + +/* + * The Atmel AT91SAM9 series has a small resource of 4 nonvolatile + * 32 Bit registers (buffered by the Vbu power). + * + * Please consider carefully before using this resource for tasks + * that do not really need nonvolatile registers. Maybe you can + * store information in EEPROM or FLASH instead. + * + * However, if you use a GPBR please document its use here and + * reference the define in your code! + * + * known typical uses of the GPBRs: + * GPBR[0]: offset for RTT timekeeping (u-boot, kernel) + * GPBR[1]: unused + * GPBR[2]: unused + * GPBR[3]: bootcount (u-boot) + */ +#define AT91_GPBR_INDEX_TIMEOFF 0 +#define AT91_GPBR_INDEX_BOOTCOUNT 3 + +#ifndef __ASSEMBLY__ + +typedef struct at91_gpbr { + u32 reg[4]; +} at91_gpbr_t; + +#endif /* __ASSEMBLY__ */ + +#endif |