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| author | Ulrich Hecht <ulrich.hecht+renesas@gmail.com> | 2017-09-29 15:08:53 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-03 20:34:21 +0200 |
| commit | fa2abb03637a55288b22082d3d679db4fe74112a (patch) | |
| tree | cd442114f48b0ded411e095ca958dcb26f33c4f8 /drivers/tty/serial/sh-sci.h | |
| parent | tty: serial: jsm: Add space before the open brace (diff) | |
| download | linux-fa2abb03637a55288b22082d3d679db4fe74112a.tar.xz linux-fa2abb03637a55288b22082d3d679db4fe74112a.zip | |
serial: sh-sci: Support for variable HSCIF hardware RX timeout
HSCIF has facilities that allow changing the timeout after which an RX
interrupt is triggered even if the FIFO is not filled. This patch allows
changing the default (15 bits of silence) using the existing sysfs
attribute "rx_fifo_timeout".
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/sh-sci.h')
| -rw-r--r-- | drivers/tty/serial/sh-sci.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h index 971b2ab088d8..2b708cc0e66c 100644 --- a/drivers/tty/serial/sh-sci.h +++ b/drivers/tty/serial/sh-sci.h @@ -62,6 +62,9 @@ enum { #define SCSCR_TDRQE BIT(15) /* Tx Data Transfer Request Enable */ #define SCSCR_RDRQE BIT(14) /* Rx Data Transfer Request Enable */ +/* Serial Control Register, HSCIF-only bits */ +#define HSSCR_TOT_SHIFT 14 + /* SCxSR (Serial Status Register) on SCI */ #define SCI_TDRE BIT(7) /* Transmit Data Register Empty */ #define SCI_RDRF BIT(6) /* Receive Data Register Full */ |