diff options
| author | Peter De Schrijver <pdeschrijver@nvidia.com> | 2014-06-12 19:36:35 +0400 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2014-07-17 15:36:44 +0400 |
| commit | 3f394f80645bf0c38a30042ba605c71663331035 (patch) | |
| tree | 6acabf07689afc6b71bb0409d100ffb732fcb236 /include/soc | |
| parent | 304664eab93f9e95a8d28fbd9702ede88bb10cc5 (diff) | |
| download | linux-3f394f80645bf0c38a30042ba605c71663331035.tar.xz | |
ARM: tegra: export apb dma readl/writel
Export APB DMA readl and writel. These are needed because we can't
access the fuses directly on Tegra20 without potentially causing a
system hang. Also have the APB DMA readl and writel return an error in
case of a read failure instead of just returning zero or ignore write
failures.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'include/soc')
| -rw-r--r-- | include/soc/tegra/fuse.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h index 0e03f104fbf8..a43a750dd0a3 100644 --- a/include/soc/tegra/fuse.h +++ b/include/soc/tegra/fuse.h @@ -27,6 +27,20 @@ u32 tegra_read_chipid(void); u8 tegra_get_chip_id(void); +#if defined(CONFIG_TEGRA20_APB_DMA) +int tegra_apb_readl_using_dma(unsigned long offset, u32 *value); +int tegra_apb_writel_using_dma(u32 value, unsigned long offset); +#else +static inline int tegra_apb_readl_using_dma(unsigned long offset, u32 *value) +{ + return -EINVAL; +} +static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset) +{ + return -EINVAL; +} +#endif /* CONFIG_TEGRA20_APB_DMA */ + #endif /* __ASSEMBLY__ */ #endif /* __SOC_TEGRA_FUSE_H__ */ |