Commit c12aa581 authored by Aleksander Jan Bajkowski's avatar Aleksander Jan Bajkowski Committed by David S. Miller
Browse files

MIPS: lantiq: dma: add small delay after reset 



Reading the DMA registers immediately after the reset causes
Data Bus Error. Adding a small delay fixes this issue.

Signed-off-by: default avatarAleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 339133f6

arch/mips/lantiq/xway/dma.c

+3 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/export.h>

#include <linux/spinlock.h>

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/of.h>
@@ -222,6 +223,8 @@ ltq_dma_init(struct platform_device *pdev) 
	clk_enable(clk);

	ltq_dma_w32_mask(0, DMA_RESET, LTQ_DMA_CTRL);



	usleep_range(1, 10);



	/* disable all interrupts */

	ltq_dma_w32(0, LTQ_DMA_IRNEN);