From 3f394f80645bf0c38a30042ba605c71663331035 Mon Sep 17 00:00:00 2001 From: Peter De Schrijver Date: Thu, 12 Jun 2014 18:36:35 +0300 Subject: 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 Signed-off-by: Stephen Warren Signed-off-by: Thierry Reding --- include/soc/tegra/fuse.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/soc') 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__ */ -- cgit