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davinci: dm646x EVM: Specify reserved EDMA channel/slots

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Not all the channels and slots available on the DM646x EVM
are used by the devices on the EVM. These resources can be
used by the DSP to speed up codec operations.

This patch reserves these channels for the DSP.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Rajashekhara, Sudhakar
2010-06-29 11:35:15 +05:30
committed by Kevin Hilman
parent a941c50340
commit cce3dddb87
3 changed files with 43 additions and 1 deletions
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35
arch/arm/mach-davinci/board-dm646x-evm.c
View File

@@ -721,6 +721,39 @@ static struct davinci_uart_config uart_config __initdata = {
#define DM646X_EVM_PHY_MASK (0x2)
#define DM646X_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */
/*
* The following EDMA channels/slots are not being used by drivers (for
* example: Timer, GPIO, UART events etc) on dm646x, hence they are being
* reserved for codecs on the DSP side.
*/
static const s16 dm646x_dma_rsv_chans[][2] = {
/* (offset, number) */
{ 0, 4},
{13, 3},
{24, 4},
{30, 2},
{54, 3},
{-1, -1}
};
static const s16 dm646x_dma_rsv_slots[][2] = {
/* (offset, number) */
{ 0, 4},
{13, 3},
{24, 4},
{30, 2},
{54, 3},
{128, 384},
{-1, -1}
};
static struct edma_rsv_info dm646x_edma_rsv[] = {
{
.rsv_chans = dm646x_dma_rsv_chans,
.rsv_slots = dm646x_dma_rsv_slots,
},
};
static __init void evm_init(void)
{
struct davinci_soc_info *soc_info = &davinci_soc_info;
@@ -732,6 +765,8 @@ static __init void evm_init(void)
platform_device_register(&davinci_nand_device);
dm646x_init_edma(dm646x_edma_rsv);
if (HAS_ATA)
davinci_init_ide();