diff options
| author | Graf Yang <graf.yang@analog.com> | 2008-04-25 03:10:04 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-04-25 03:10:04 +0800 |
| commit | 565c0d3ff438d18aa8c3201979fb1f5d1872ab11 (patch) | |
| tree | 8a9984e69dbc4f03fd985b8b013361c89177f550 /arch | |
| parent | 5be36d22b28f01e5074f78b29aa6128da0a53641 (diff) | |
| download | linux-565c0d3ff438d18aa8c3201979fb1f5d1872ab11.tar.bz2 | |
[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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/blackfin/kernel/bfin_dma_5xx.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index df4d2a5b8e30..fd5448d6107c 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -106,12 +106,15 @@ int request_dma(unsigned int channel, char *device_id) #ifdef CONFIG_BF54x if (channel >= CH_UART2_RX && channel <= CH_UART3_TX) { - if (strncmp(device_id, "BFIN_UART", 9) == 0) + if (strncmp(device_id, "BFIN_UART", 9) == 0) { + dma_ch[channel].regs->peripheral_map &= 0x0FFF; dma_ch[channel].regs->peripheral_map |= ((channel - CH_UART2_RX + 0xC)<<12); - else + } else { + dma_ch[channel].regs->peripheral_map &= 0x0FFF; dma_ch[channel].regs->peripheral_map |= ((channel - CH_UART2_RX + 0x6)<<12); + } } #endif |