Introduce a function to read the Tegra chipid. This will be used by the SMP code to distinguish between Tegra variants. --- Should this be merged with the fuse reading code even though this is a hardwired register, not a fuse based register? Signed-off-by: Peter De Schrijver <pdeschrijver@xxxxxxxxxx> --- arch/arm/mach-tegra/chipid.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 38 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-tegra/chipid.h diff --git a/arch/arm/mach-tegra/chipid.h b/arch/arm/mach-tegra/chipid.h new file mode 100644 index 0000000..beb6a66 --- /dev/null +++ b/arch/arm/mach-tegra/chipid.h @@ -0,0 +1,38 @@ +/* + * arch/arm/mach-tegra/chipid.h + * + * Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __MACH_TEGRA_CHIPID_H +#define __MACH_TEGRA_CHIPID_H + +#define APB_MISC_GP_HIDREV 0x804 + +#define TEGRA20 0x20 +#define TEGRA30 0x30 + +#ifndef __ASSEMBLY__ + +#include <asm/io.h> + +static inline u32 tegra_get_chipid(void) +{ + return readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + + APB_MISC_GP_HIDREV) >> 8 & 0xff; +} + +#endif +#endif -- 1.7.7.rc0.72.g4b5ea.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
