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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-05 01:51:19 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-05 01:51:19 (GMT)
commit79eb238c76782a59d51adf8a3dd7f6444245b475 (patch)
tree73bd8c89a1ef19ec01a7592f189bbc0f52847185 /Documentation/ABI
parent53ee983378ff23e8f3ff95ecf99dea7c6c221900 (diff)
parent5a64096700dc9761b57e767c9f0b740eb2cb84dd (diff)
downloadlinux-79eb238c76782a59d51adf8a3dd7f6444245b475.tar.xz
Merge tag 'tty-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty / serial driver update from Greg KH: "Here's the big tty / serial driver update for 3.17-rc1. Nothing major, just a number of fixes and new features for different serial drivers, and some more tty core fixes and documentation of the tty locks. All of these have been in linux-next for a while" * tag 'tty-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (82 commits) tty/n_gsm.c: fix a memory leak in gsmld_open pch_uart: don't hardcode PCI slot to get DMA device tty: n_gsm, use setup_timer Revert "ARC: [arcfpga] stdout-path now suffices for earlycon/console" serial: sc16is7xx: Correct initialization of s->clk serial: 8250_dw: Add support for deferred probing serial: 8250_dw: Add optional reset control support serial: st-asc: Fix overflow in baudrate calculation serial: st-asc: Don't call BUG in asc_console_setup() tty: serial: msm: Make of_device_id array const tty/n_gsm.c: get gsm->num after gsm_activate_mux serial/core: Fix too big allocation for attribute member drivers/tty/serial: use correct type for dma_map/unmap serial: altera_jtaguart: Fix putchar function passed to uart_console_write() serial/uart/8250: Add tunable RX interrupt trigger I/F of FIFO buffers Serial: allow port drivers to have a default attribute group tty: kgdb_nmi: Automatically manage tty enable serial: altera_jtaguart: Adpot uart_console_write() serial: samsung: improve code clarity by defining a variable serial: samsung: correct the case and default order in switch ...
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-tty16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty
index ad22fb0..9eb3c2b 100644
--- a/Documentation/ABI/testing/sysfs-tty
+++ b/Documentation/ABI/testing/sysfs-tty
@@ -138,3 +138,19 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS0/rx_trig_bytes
+Date: May 2014
+Contact: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
+Description:
+ Shows current RX interrupt trigger bytes or sets the
+ user specified value to change it for the FIFO buffer.
+ Users can show or set this value regardless of opening the
+ serial device file or not.
+
+ The RX trigger can be set one of four kinds of values for UART
+ serials. When users input a meaning less value to this I/F,
+ the RX trigger is changed to the nearest lower value for the
+ device specification. For example, when user sets 7bytes on
+ 16550A, which has 1/4/8/14 bytes trigger, the RX trigger is
+ automatically changed to 4 bytes.