linux-toradex.git/drivers/tty/hvc/hvc_opal.c, branch v4.4.156

hvc_opal: don't set tb_ticks_per_usec in udbg_init_opal_common()

2018-08-06T14:24:31+00:00

[ Upstream commit 447808bf500a7cc92173266a59f8a494e132b122 ]

time_init() will set up tb_ticks_per_usec based on reality.
time_init() is called *after* udbg_init_opal_common() during boot.

from arch/powerpc/kernel/time.c:
  unsigned long tb_ticks_per_usec = 100; /* sane default */

Currently, all powernv systems have a timebase frequency of 512mhz
(512000000/1000000 == 0x200) - although there's nothing written
down anywhere that I can find saying that we couldn't make that
different based on the requirements in the ISA.

So, we've been (accidentally) thwacking the (currently) correct
(for powernv at least) value for tb_ticks_per_usec earlier than
we otherwise would have.

The "sane default" seems to be adequate for our purposes between
udbg_init_opal_common() and time_init() being called, and if it isn't,
then we should probably be setting it somewhere that isn't hvc_opal.c!

Signed-off-by: Stewart Smith 
Signed-off-by: Michael Ellerman 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

hvc: Convert to using interrupts instead of opal events

2015-05-22T05:14:38+00:00

Convert the opal hvc driver to use the new irqchip to register for
opal events. As older firmware versions may not have device tree
bindings for the interrupt parent we just use a hardcoded hwirq based
on the event number.

Signed-off-by: Alistair Popple 
Signed-off-by: Michael Ellerman

tty/hvc_opal: constify of_device_id array

2015-03-26T21:49:10+00:00

of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

Signed-off-by: Fabian Frederick 
Signed-off-by: Greg Kroah-Hartman

tty: hvc: drop owner assignment from platform_drivers

2014-10-20T14:21:44+00:00

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang

tty: Update hypervisor tty drivers to use core stdout parsing code.

2014-06-26T16:12:23+00:00

The evh_bytechan, hvc_opal and hvc_vio drivers all open code the parsing
of the stdout node in the device tree. This patch simplifies the driver
by removing the duplicated functionality.

Signed-off-by: Grant Likely

tty/hvc_opal: Kick the HVC thread on OPAL console events

2014-04-07T00:34:27+00:00

The firmware can notify us when new input data is available, so
let's make sure we wakeup the HVC thread in that case.

Signed-off-by: Benjamin Herrenschmidt

drivers/tty/hvc: don't use module_init in non-modular hyp. console code

2014-02-07T16:40:54+00:00

The HVC_OPAL/RTAS/UDBG/XEN options are all bool, and hence their support
is either present or absent.  It will never be modular, so using
module_init as an alias for __initcall is rather misleading.

Fix this up now, so that we can relocate module_init from
init.h into module.h in the future.  If we don't do this, we'd
have to add module.h to obviously non-modular code, and that
would be a worse thing.

Note that direct use of __initcall is discouraged, vs. one
of the priority categorized subgroups.  As __initcall gets
mapped onto device_initcall, our use of device_initcall
directly in this change means that the runtime impact is
zero -- it will remain at level 6 in initcall ordering.

Also the __exitcall functions have been outright deleted since
they are only ever of interest to UML, and UML will never be
using any of this code.

Cc: Richard Weinberger 
Cc: Konrad Rzeszutek Wilk 
Cc: Boris Ostrovsky 
Signed-off-by: Paul Gortmaker 
Acked-by: David Vrabel 
Signed-off-by: Greg Kroah-Hartman

tty/hvc_opal: powerpc: Make OPAL HVC device tree accesses endian safe

2013-10-11T05:48:54+00:00

Signed-off-by: Benjamin Herrenschmidt

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2012-12-13T20:00:02+00:00

Pull trivial branch from Jiri Kosina:
 "Usual stuff -- comment/printk typo fixes, documentation updates, dead
  code elimination."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
  HOWTO: fix double words typo
  x86 mtrr: fix comment typo in mtrr_bp_init
  propagate name change to comments in kernel source
  doc: Update the name of profiling based on sysfs
  treewide: Fix typos in various drivers
  treewide: Fix typos in various Kconfig
  wireless: mwifiex: Fix typo in wireless/mwifiex driver
  messages: i2o: Fix typo in messages/i2o
  scripts/kernel-doc: check that non-void fcts describe their return value
  Kernel-doc: Convention: Use a "Return" section to describe return values
  radeon: Fix typo and copy/paste error in comments
  doc: Remove unnecessary declarations from Documentation/accounting/getdelays.c
  various: Fix spelling of "asynchronous" in comments.
  Fix misspellings of "whether" in comments.
  eisa: Fix spelling of "asynchronous".
  various: Fix spelling of "registered" in comments.
  doc: fix quite a few typos within Documentation
  target: iscsi: fix comment typos in target/iscsi drivers
  treewide: fix typo of "suport" in various comments and Kconfig
  treewide: fix typo of "suppport" in various comments
  ...

tty: remove use of __devexit

2012-11-21T23:27:46+00:00

CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.

Signed-off-by: Bill Pemberton 
Cc: Jiri Slaby 
Cc: Alan Cox 
Acked-by: Tobias Klauser 
Cc: Lucas Tavares 
Cc: Daniel Walker 
Cc: Bryan Huntsman 
Cc: "David S. Miller" 
Cc: Peter Korsgaard 
Cc: Tony Prisk 
Acked-by: David Brown 
Signed-off-by: Greg Kroah-Hartman