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Rather than rely on explicit initialization order called from SoC setup code, use a plain initcall and rely on initcall ordering to take care of dependencies. This driver exposes some functionality (querying the chip ID) needed at very early stages of the boot process. An early initcall is good enough provided that some of the dependencies are deferred to later stages. To make sure any abuses are easily caught, output a warning message if the chip ID is queried while it can't be read yet. Signed-off-by: Thierry Reding <treding@nvidia.com>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __SOC_TEGRA_FUSE_H__
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#define __SOC_TEGRA_FUSE_H__
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#define TEGRA20 0x20
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#define TEGRA30 0x30
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#define TEGRA114 0x35
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#define TEGRA124 0x40
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#define TEGRA_FUSE_SKU_CALIB_0 0xf0
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#define TEGRA30_FUSE_SATA_CALIB 0x124
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#ifndef __ASSEMBLY__
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u32 tegra_read_chipid(void);
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u8 tegra_get_chip_id(void);
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enum tegra_revision {
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TEGRA_REVISION_UNKNOWN = 0,
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TEGRA_REVISION_A01,
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TEGRA_REVISION_A02,
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TEGRA_REVISION_A03,
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TEGRA_REVISION_A03p,
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TEGRA_REVISION_A04,
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TEGRA_REVISION_MAX,
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};
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struct tegra_sku_info {
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int sku_id;
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int cpu_process_id;
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int cpu_speedo_id;
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int cpu_speedo_value;
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int cpu_iddq_value;
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int core_process_id;
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int soc_speedo_id;
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int gpu_speedo_id;
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int gpu_process_id;
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int gpu_speedo_value;
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enum tegra_revision revision;
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};
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u32 tegra_read_straps(void);
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u32 tegra_read_chipid(void);
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int tegra_fuse_readl(unsigned long offset, u32 *value);
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extern struct tegra_sku_info tegra_sku_info;
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#endif /* __ASSEMBLY__ */
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#endif /* __SOC_TEGRA_FUSE_H__ */
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