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authorImre Deak <imre.deak@solidboot.com>2006-09-25 12:41:28 +0300
committerTony Lindgren <tony@atomide.com>2006-09-25 12:41:28 +0300
commitb5beef5d5dddef820eb36c97216487ed7cf68971 (patch)
tree0af4876d2211273eeb1757420a436021c46890c6 /arch/arm/plat-omap/dma.c
parent5a4e86daa29e73a02ce8eb484837813e341a0b8a (diff)
ARM: OMAP: Sleep is prevented when no LCD is attached
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>
Diffstat (limited to 'arch/arm/plat-omap/dma.c')
-rw-r--r--arch/arm/plat-omap/dma.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 9eddc950714..9948d7a2633 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -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",