davinci: da8xx/omapl EVM: Specify reserved channels/slots

The drivers on da8xx/omapl EVMs do not utilize all the channels
and slots provided by EDMA. Some of these are better utilitzed by
the DSP on the SoC for speeding up codec operations.

Reserve these channels/slots 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>

1 files changed, 31 insertions, 1 deletions

diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index 212d97084bd7..b61e87250b3b 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -494,12 +494,42 @@ static struct davinci_i2c_platform_data da830_evm_i2c_0_pdata = {
         .bus_delay      = 0,    /* usec */
 };
 
+/*
+ * The following EDMA channels/slots are not being used by drivers (for
+ * example: Timer, GPIO, UART events etc) on da830/omap-l137 EVM, hence
+ * they are being reserved for codecs on the DSP side.
+ */
+static const s16 da830_dma_rsv_chans[][2] = {
+        /* (offset, number) */
+        { 8,  2},
+        {12,  2},
+        {24,  4},
+        {30,  2},
+        {-1, -1}
+};
+
+static const s16 da830_dma_rsv_slots[][2] = {
+        /* (offset, number) */
+        { 8,  2},
+        {12,  2},
+        {24,  4},
+        {30, 26},
+        {-1, -1}
+};
+
+static struct edma_rsv_info da830_edma_rsv[] = {
+        {
+                .rsv_chans      = da830_dma_rsv_chans,
+                .rsv_slots      = da830_dma_rsv_slots,
+        },
+};
+
 static __init void da830_evm_init(void)
 {
         struct davinci_soc_info *soc_info = &davinci_soc_info;
         int ret;
 
-        ret = da8xx_register_edma();
+        ret = da830_register_edma(da830_edma_rsv);
         if (ret)
                 pr_warning("da830_evm_init: edma registration failed: %d\n",
                                 ret);