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| author | Jamie Iles <jamie@jamieiles.com> | 2010-12-01 23:39:36 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-12-10 15:19:38 -0800 |
| commit | a3ae0fc34f58e7163b7724feb3d77aa4603f0dc3 (patch) | |
| tree | 05c435ba0ee0b071e3c45bcef33eac9f1fd37e80 /include/linux/serial_core.h | |
| parent | 49d5741be27aa90301b89bf254972b355ed9c8ee (diff) | |
| download | lwn-a3ae0fc34f58e7163b7724feb3d77aa4603f0dc3.tar.gz lwn-a3ae0fc34f58e7163b7724feb3d77aa4603f0dc3.zip | |
8250: add a UPIO_DWAPB32 for 32 bit accesses
Some platforms contain a Synopsys DesignWare APB UART that is attached
to a 32-bit APB bus where sub-word accesses are not allowed. Add a new
IO type (UPIO_DWAPB32) that performs 32 bit acccesses to the UART.
v2:
- don't test for 32 bit in the output fast path, provide a
separate dwabp32_serial_out() function. Refactor
dwabp_serial_out() so that we can reuse the LCR saving
code.
v3:
- rebased on top of "8250: use container_of() instead of
casting"
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/serial_core.h')
| -rw-r--r-- | include/linux/serial_core.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 9ff9b7db293b..7a6daf189995 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -314,6 +314,7 @@ struct uart_port { #define UPIO_TSI (5) /* Tsi108/109 type IO */ #define UPIO_DWAPB (6) /* DesignWare APB UART */ #define UPIO_RM9000 (7) /* RM9000 type IO */ +#define UPIO_DWAPB32 (8) /* DesignWare APB UART (32 bit accesses) */ unsigned int read_status_mask; /* driver specific */ unsigned int ignore_status_mask; /* driver specific */ |