ARM: OMAP1: DMA: Correct the number of logical channels

OMAP1510, OMAP5910 and OMAP310 have only 9 logical channels.
OMAP1610, OMAP5912, OMAP1710, OMAP730, and OMAP850 have 16 logical channels
available.

The wired 17 for the lch_count must have been used to cover the 16 + 1
dedicated LCD channel, in reality we can only use 9 or 16 channels.

The d->chan_count is not used by the omap-dma stack, so we can skip the
setup. chan_count was configured to the number of logical channels and not
the actual number of physical channels anyways.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 7 insertions, 9 deletions

diff --git a/arch/arm/mach-omap1/dma.c b/arch/arm/mach-omap1/dma.c
index f6ba589cd312..c821c1d5610e 100644
--- a/arch/arm/mach-omap1/dma.c
+++ b/arch/arm/mach-omap1/dma.c
@@ -32,7 +32,6 @@
 #include "soc.h"
 
 #define OMAP1_DMA_BASE                  (0xfffed800)
-#define OMAP1_LOGICAL_DMA_CH_COUNT      17
 
 static u32 enable_1510_mode;
 
@@ -348,8 +347,6 @@ static int __init omap1_system_dma_init(void)
                 goto exit_iounmap;
         }
 
-        d->lch_count            = OMAP1_LOGICAL_DMA_CH_COUNT;
-
         /* Valid attributes for omap1 plus processors */
         if (cpu_is_omap15xx())
                 d->dev_caps = ENABLE_1510_MODE;
@@ -366,13 +363,14 @@ static int __init omap1_system_dma_init(void)
         d->dev_caps             |= CLEAR_CSR_ON_READ;
         d->dev_caps             |= IS_WORD_16;
 
-        if (cpu_is_omap15xx())
-                d->chan_count = 9;
-        else if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
-                if (!(d->dev_caps & ENABLE_1510_MODE))
-                        d->chan_count = 16;
+        /* available logical channels */
+        if (cpu_is_omap15xx()) {
+                d->lch_count = 9;
+        } else {
+                if (d->dev_caps & ENABLE_1510_MODE)
+                        d->lch_count = 9;
                 else
-                        d->chan_count = 9;
+                        d->lch_count = 16;
         }
 
         p = dma_plat_info;