diff options
| author | Colin Cross <ccross@android.com> | 2010-04-05 13:16:42 -0700 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2010-10-21 18:12:35 -0700 |
| commit | 4de3a8fa334851e642d4889d6afa6e5d3daea10a (patch) | |
| tree | 955a73509a5745ee4e7a71fa42f10c0c57632aa5 /arch/arm/mach-tegra/common.c | |
| parent | 7056d423f16103f6700569f60ca842d91bfaabab (diff) | |
[ARM] tegra: Add APB DMA support
The APB DMA block handles DMA transfers to and from some peripherals
in the Tegra SOC. It reads from sequential addresses on the memory
bus, and writes repeatedly to the same address on the APB bus.
Two transfer modes are supported, oneshot for transferring a known
size to or from a peripheral, and continuous for streaming data.
In continuous mode, a callback occurs when the buffer is half full
to allow the existing data to be handled and a new request queued.x
v2 changes:
dma API no longer uses PTR_ERR
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Colin Cross <ccross@android.com>
Diffstat (limited to 'arch/arm/mach-tegra/common.c')
| -rw-r--r-- | arch/arm/mach-tegra/common.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c index 445104a993b..7c91e2b9d64 100644 --- a/arch/arm/mach-tegra/common.c +++ b/arch/arm/mach-tegra/common.c @@ -19,10 +19,13 @@ #include <linux/init.h> #include <linux/io.h> +#include <linux/clk.h> +#include <linux/delay.h> #include <asm/hardware/cache-l2x0.h> #include <mach/iomap.h> +#include <mach/dma.h> #include "board.h" #include "clock.h" @@ -52,6 +55,7 @@ void __init tegra_init_cache(void) l2x0_init(p, 0x6C080001, 0x8200c3fe); #endif + } void __init tegra_common_init(void) @@ -60,4 +64,7 @@ void __init tegra_common_init(void) tegra_init_clock(); tegra_clk_init_from_table(common_clk_init_table); tegra_init_cache(); +#ifdef CONFIG_TEGRA_SYSTEM_DMA + tegra_dma_init(); +#endif } |