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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-12-22 20:59:16 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-01-05 19:58:53 +0300
commit38d624361b2a82d6317c379aebf81b1b28210bb0 (patch)
treefca8b4acdba29a8550fc7e7d19de2d2228c36be8 /include/linux/amba
parent68b65f7305e54b822b2483c60de7d7b017526a92 (diff)
downloadlinux-38d624361b2a82d6317c379aebf81b1b28210bb0.tar.xz
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')
-rw-r--r--include/linux/amba/serial.h15
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