diff options
| author | Colin Cross <ccross@android.com> | 2010-11-24 14:44:09 -0800 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2010-11-24 21:49:11 -0800 |
| commit | ad42ec439870c1198bb263d3764d1f5cb516880a (patch) | |
| tree | 3ad290832e74acab4902adf3929beb4cf1c8438d /arch/arm/mach-tegra/fuse.h | |
| parent | 5310d336e188883341c9069115e05540c16891b1 (diff) | |
ARM: tegra: fuse: Separate fuse dma initialization
There is a dependency loop between fuses, clocks, and APBDMA.
If dma is enabled, fuse reads must go through APBDMA to avoid
corruption due to a hw bug. APBDMA requires a clock to be
enabled. Clocks must read a fuse to determine allowable cpu
frequencies.
Separate out the fuse DMA initialization, and allow the fuse
read and write functions to be called without using DMA before
the DMA initialization has been completed. Access to the fuses
before APBDMA is initialized won't hit the hardware bug because
nothing else can be using DMA.
Change-Id: Ib5cb0f346488f2869e8314c5f3b24fd86873f4c3
Signed-off-by: Colin Cross <ccross@android.com>
Diffstat (limited to 'arch/arm/mach-tegra/fuse.h')
| -rw-r--r-- | arch/arm/mach-tegra/fuse.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h index 82461036a0e1..624bbfa6e5fb 100644 --- a/arch/arm/mach-tegra/fuse.h +++ b/arch/arm/mach-tegra/fuse.h @@ -22,5 +22,6 @@ int tegra_sku_id(void); int tegra_cpu_process_id(void); int tegra_core_process_id(void); void tegra_init_fuse(void); +void tegra_init_fuse_dma(void); u32 tegra_fuse_readl(unsigned long offset); void tegra_fuse_writel(u32 value, unsigned long offset); |