diff options
| author | Mike Frysinger <michael.frysinger@analog.com> | 2007-12-24 19:40:05 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2007-12-24 19:40:05 +0800 |
| commit | 0bcfd70ea11a5d6f2362be463513a60245a62baf (patch) | |
| tree | fdf47e68cc5fc916da5d985f797b262c36997c4e /include/asm-blackfin/mach-bf548 | |
| parent | 4c195ad88b7df54b2e7340dec3446aee6ca84cd1 (diff) | |
[Blackfin] serial driver: fix bug - cache the bits of the LSR on systems where the LSR is read-to-clear
Cache the bits of the LSR on systems where the LSR is read-to-clear
so that we can safely read the LSR in random places. this fixes
older parts where break/framing/parity/overflow was not being detected
at all in PIO mode, and this fixes newer parts where
break/framing/parity/overflow was being reported all the time
without being cleared.
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'include/asm-blackfin/mach-bf548')
| -rw-r--r-- | include/asm-blackfin/mach-bf548/bfin_serial_5xx.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-blackfin/mach-bf548/bfin_serial_5xx.h b/include/asm-blackfin/mach-bf548/bfin_serial_5xx.h index 3770aa38ee9..8733d47747e 100644 --- a/include/asm-blackfin/mach-bf548/bfin_serial_5xx.h +++ b/include/asm-blackfin/mach-bf548/bfin_serial_5xx.h @@ -32,6 +32,7 @@ #define UART_PUT_DLH(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLH),v) #define UART_PUT_LSR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_LSR),v) #define UART_PUT_LCR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_LCR),v) +#define UART_CLEAR_LSR(uart) bfin_write16(((uart)->port.membase + OFFSET_LSR), -1) #define UART_PUT_GCTL(uart,v) bfin_write16(((uart)->port.membase + OFFSET_GCTL),v) #if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS) |