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| author | Thierry Reding <treding@nvidia.com> | 2020-09-17 13:07:46 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2020-09-18 16:55:26 +0300 |
| commit | 52e6d399a41da68125ec107f5f5f688a74ab7ac4 (patch) | |
| tree | c4cb3e66270fc65b90d1fcd3dfa265aa268e4b78 | |
| parent | 775edf7856d81fde852968212cd58fc9a3f8cd7d (diff) | |
| download | linux-52e6d399a41da68125ec107f5f5f688a74ab7ac4.tar.xz | |
soc/tegra: fuse: Implement tegra_is_silicon()
This function can be used by drivers to determine whether code is
running on silicon or on a simulation platform.
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
| -rw-r--r-- | drivers/soc/tegra/fuse/tegra-apbmisc.c | 19 | ||||
| -rw-r--r-- | include/soc/tegra/fuse.h | 1 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c index 92a2d646c183..946a2d9ad117 100644 --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c @@ -52,6 +52,25 @@ u8 tegra_get_platform(void) return (tegra_read_chipid() >> 20) & 0xf; } +bool tegra_is_silicon(void) +{ + switch (tegra_get_chip_id()) { + case TEGRA194: + if (tegra_get_platform() == 0) + return true; + + return false; + } + + /* + * Chips prior to Tegra194 have a different way of determining whether + * they are silicon or not. Since we never supported simulation on the + * older Tegra chips, don't bother extracting the information and just + * report that we're running on silicon. + */ + return true; +} + u32 tegra_read_straps(void) { WARN(!chipid, "Tegra ABP MISC not yet available\n"); diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h index 214908fc5581..a9db917a1d06 100644 --- a/include/soc/tegra/fuse.h +++ b/include/soc/tegra/fuse.h @@ -24,6 +24,7 @@ u32 tegra_read_chipid(void); u8 tegra_get_chip_id(void); u8 tegra_get_platform(void); +bool tegra_is_silicon(void); enum tegra_revision { TEGRA_REVISION_UNKNOWN = 0, |