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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-22 17:59:16 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-01-05 16:58:53 +0000 |
| commit | 38d624361b2a82d6317c379aebf81b1b28210bb0 (patch) | |
| tree | fca8b4acdba29a8550fc7e7d19de2d2228c36be8 /include/linux/amba/serial.h | |
| parent | 68b65f7305e54b822b2483c60de7d7b017526a92 (diff) | |
| download | lwn-38d624361b2a82d6317c379aebf81b1b28210bb0.tar.gz lwn-38d624361b2a82d6317c379aebf81b1b28210bb0.zip | |
ARM: PL011: add DMA burst threshold support for ST variants
ST Micro variants has some specific dma burst threshold compensation,
which allows them to make better use of a DMA controller. Add support
to set this up.
Based on a patch from Linus Walleij.
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/linux/amba/serial.h')
| -rw-r--r-- | include/linux/amba/serial.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/amba/serial.h b/include/linux/amba/serial.h index 577f22eb9225..5479fdc849e9 100644 --- a/include/linux/amba/serial.h +++ b/include/linux/amba/serial.h @@ -113,6 +113,21 @@ #define UART01x_LCRH_PEN 0x02 #define UART01x_LCRH_BRK 0x01 +#define ST_UART011_DMAWM_RX_1 (0 << 3) +#define ST_UART011_DMAWM_RX_2 (1 << 3) +#define ST_UART011_DMAWM_RX_4 (2 << 3) +#define ST_UART011_DMAWM_RX_8 (3 << 3) +#define ST_UART011_DMAWM_RX_16 (4 << 3) +#define ST_UART011_DMAWM_RX_32 (5 << 3) +#define ST_UART011_DMAWM_RX_48 (6 << 3) +#define ST_UART011_DMAWM_TX_1 0 +#define ST_UART011_DMAWM_TX_2 1 +#define ST_UART011_DMAWM_TX_4 2 +#define ST_UART011_DMAWM_TX_8 3 +#define ST_UART011_DMAWM_TX_16 4 +#define ST_UART011_DMAWM_TX_32 5 +#define ST_UART011_DMAWM_TX_48 6 + #define UART010_IIR_RTIS 0x08 #define UART010_IIR_TIS 0x04 #define UART010_IIR_RIS 0x02 |