From b5beef5d5dddef820eb36c97216487ed7cf68971 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Mon, 25 Sep 2006 12:41:28 +0300 Subject: [PATCH] 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 Signed-off-by: Juha Yrjola Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/dma.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 9eddc9507147..9948d7a26339 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", -- 2.20.1