[Blackfin] arch: fix bug - before assign new channel to the map register, need clear the bits first.
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=2445 Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
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@ -106,12 +106,15 @@ int request_dma(unsigned int channel, char *device_id)
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#ifdef CONFIG_BF54x
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if (channel >= CH_UART2_RX && channel <= CH_UART3_TX) {
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if (strncmp(device_id, "BFIN_UART", 9) == 0)
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if (strncmp(device_id, "BFIN_UART", 9) == 0) {
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dma_ch[channel].regs->peripheral_map &= 0x0FFF;
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dma_ch[channel].regs->peripheral_map |=
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((channel - CH_UART2_RX + 0xC)<<12);
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else
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} else {
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dma_ch[channel].regs->peripheral_map &= 0x0FFF;
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dma_ch[channel].regs->peripheral_map |=
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((channel - CH_UART2_RX + 0x6)<<12);
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}
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}
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#endif
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