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| author |   Mike Frysinger <michael.frysinger@analog.com> | 2007-05-21 18:09:27 +0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-21 09:50:22 -0700 |
| commit | 5079df993c3ab45af10dc9a45b3b9e712fd56f23 (patch) | |
| tree | 9c978e20be84f4cc058d6a56cda5cdf497bc2be7 /arch/blackfin/mach-bf533 | |
| parent | Blackfin arch: issue reset via SWRST so we dont clobber the watchdog state (diff) | |
| download | linux-dev-5079df993c3ab45af10dc9a45b3b9e712fd56f23.tar.xz linux-dev-5079df993c3ab45af10dc9a45b3b9e712fd56f23.zip | |
Blackfin arch: document why we have to touch the UART peripheral in our boot up code
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/blackfin/mach-bf533')
| -rw-r--r-- | arch/blackfin/mach-bf533/head.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/blackfin/mach-bf533/head.S b/arch/blackfin/mach-bf533/head.S index 1a54ff5f061d..4db9e6240906 100644 --- a/arch/blackfin/mach-bf533/head.S +++ b/arch/blackfin/mach-bf533/head.S @@ -173,7 +173,8 @@ ENTRY(__stext) STI R2; #endif - /* Initialise UART */ + /* Initialise UART - when booting from u-boot, the UART is not disabled + * so if we dont initalize here, our serial console gets hosed */ p0.h = hi(UART_LCR); p0.l = lo(UART_LCR); r0 = 0x0(Z); |