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

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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>
This commit is contained in:
Peter Ujfalusi 2017-01-03 13:22:34 +02:00 committed by Tony Lindgren
parent 6ca36a455e
commit 657279778a
1 changed files with 7 additions and 9 deletions
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16
arch/arm/mach-omap1/dma.c
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@ -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;