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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-13 10:02:05 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-13 10:02:05 -0800
commit67ad058d97b8cff441211b791d97e5f776b81210 (patch)
tree4ee85611b11fe91a8a8eb1f7561484e7abb2f85a /Documentation/kernel-parameters.txt
parentMerge tag 'usb-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb (diff)
parentdrivers/tty/serial: delete unused MODULE_DEVICE_TABLE from atmel_serial.c (diff)
downloadlinux-dev-67ad058d97b8cff441211b791d97e5f776b81210.tar.xz
linux-dev-67ad058d97b8cff441211b791d97e5f776b81210.zip
Merge tag 'tty-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial updates from Greg KH: "Here is the big serial/tty driver update for 4.5-rc1. Lots of driver updates and some tty core changes. All of these have been in linux-next and the details are in the shortlog" * tag 'tty-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (127 commits) drivers/tty/serial: delete unused MODULE_DEVICE_TABLE from atmel_serial.c serial: sh-sci: Remove cpufreq notifier to fix crash/deadlock serial: 8250: of: Fix the driver and actually compile the 8250_of tty: amba-pl011: use iotype instead of access_32b to track 32-bit I/O tty: amba-pl011: fix earlycon register offsets serial: sh-sci: Drop the sci_fck clock fallback sh: sh7734: Correct SCIF type for BRG sh: Remove sci_ick clock alias sh: Rename sci_ick and sci_fck clock to fck serial: sh-sci: Add support for optional BRG on (H)SCIF serial: sh-sci: Add support for optional external (H)SCK input serial: sh-sci: Prepare for multiple sampling clock sources serial: sh-sci: Correct SCIF type on R-Car for BRG serial: sh-sci: Correct SCIF type on RZ/A1H serial: sh-sci: Replace struct sci_port_info by type/regtype encoding serial: sh-sci: Add BRG register definitions serial: sh-sci: Take into account sampling rate for max baud rate serial: sh-sci: Merge sci_scbrr_calc() and sci_baud_calc_hscif() serial: sh-sci: Avoid calculating the receive margin for HSCIF serial: sh-sci: Improve bit rate error calculation for HSCIF ...
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt14
1 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 8b9fc655ddc7..b7d44871effc 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -730,16 +730,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
uart[8250],io,<addr>[,options]
uart[8250],mmio,<addr>[,options]
+ uart[8250],mmio16,<addr>[,options]
uart[8250],mmio32,<addr>[,options]
uart[8250],0x<addr>[,options]
Start an early, polled-mode console on the 8250/16550
UART at the specified I/O port or MMIO address,
switching to the matching ttyS device later.
MMIO inter-register address stride is either 8-bit
- (mmio) or 32-bit (mmio32).
- If none of [io|mmio|mmio32], <addr> is assumed to be
- equivalent to 'mmio'. 'options' are specified in the
- same format described for ttyS above; if unspecified,
+ (mmio), 16-bit (mmio16), or 32-bit (mmio32).
+ If none of [io|mmio|mmio16|mmio32], <addr> is assumed
+ to be equivalent to 'mmio'. 'options' are specified in
+ the same format described for ttyS above; if unspecified,
the h/w is not re-initialized.
hvc<n> Use the hypervisor console device <n>. This is for
@@ -1011,10 +1012,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
unspecified, the h/w is not initialized.
pl011,<addr>
+ pl011,mmio32,<addr>
Start an early, polled-mode console on a pl011 serial
port at the specified address. The pl011 serial port
must already be setup and configured. Options are not
- yet supported.
+ yet supported. If 'mmio32' is specified, then only
+ the driver will use only 32-bit accessors to read/write
+ the device registers.
msm_serial,<addr>
Start an early, polled-mode console on an msm serial