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ARM: OMAP: Sleep is prevented when no LCD is attached

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We have to make sure that the LCD DMA external destination bit is
cleared by default, otherwise OMAP won't sleep.

Signed-off-by: Imre Deak <imre.deak@solidboot.com>
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Imre Deak 2006-09-25 12:41:28 +03:00 committed by Tony Lindgren
parent 5a4e86daa2
commit b5beef5d5d
1 changed files with 8 additions and 0 deletions
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8
arch/arm/plat-omap/dma.c
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@ -1339,6 +1339,14 @@ static int __init omap_init_dma(void)
dma_chan_count = 16;
} else
dma_chan_count = 9;
if (cpu_is_omap16xx()) {
u16 w;
/* this would prevent OMAP sleep */
w = omap_readw(OMAP1610_DMA_LCD_CTRL);
w &= ~(1 << 8);
omap_writew(w, OMAP1610_DMA_LCD_CTRL);
}
} else if (cpu_is_omap24xx()) {
u8 revision = omap_readb(OMAP_DMA4_REVISION);
printk(KERN_INFO "OMAP DMA hardware revision %d.%d\n",