linux-toradex.git/drivers/amba/tegra-ahb.c, branch v5.11

ARM: tegra: Replace zero-length array with flexible-array

2020-06-16T04:08:28+00:00

There is a regular need in the kernel to provide a way to declare having a
dynamically sized set of trailing elements in a structure. Kernel code should
always use “flexible array members”[1] for these cases. The older style of
one-element or zero-length arrays should no longer be used[2].

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://github.com/KSPP/linux/issues/21

Signed-off-by: Gustavo A. R. Silva

drivers: Introduce device lookup variants by of_node

2019-07-30T11:07:41+00:00

Introduce wrappers for {bus/driver/class}_find_device() to
locate devices by its of_node.

Cc: Maarten Lankhorst 
Cc: Maxime Ripard 
Cc: dri-devel@lists.freedesktop.org
Cc: David Airlie 
Cc: Daniel Vetter 
Cc: devicetree@vger.kernel.org
Cc: Florian Fainelli 
Cc: Frank Rowand 
Cc: Heiko Stuebner 
Cc: Liam Girdwood 
Cc: linux-i2c@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-spi@vger.kernel.org
Cc: Mathieu Poirier 
Cc: Rob Herring 
Cc: Srinivas Kandagatla 
Cc: Takashi Iwai 
Cc: Alan Tull 
Cc: linux-fpga@vger.kernel.org
Cc: Peter Rosin 
Cc: Florian Fainelli 
Cc: Heiner Kallweit 
Cc: "David S. Miller" 
Cc: Andrew Lunn 
Cc: Liam Girdwood 
Cc: "Rafael J. Wysocki" 
Cc: Thor Thayer 
Cc: Jiri Slaby 
Cc: Andrew Lunn 
Cc: Peter Rosin 
Signed-off-by: Suzuki K Poulose 
Acked-by: Lee Jones 
Acked-by: Wolfram Sang  # I2C part
Acked-by: Moritz Fischer  # For FPGA part
Acked-by: Mark Brown 
Link: https://lore.kernel.org/r/20190723221838.12024-3-suzuki.poulose@arm.com
Signed-off-by: Greg Kroah-Hartman

Merge tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2019-07-12T19:24:03+00:00

Pull driver core and debugfs updates from Greg KH:
 "Here is the "big" driver core and debugfs changes for 5.3-rc1

  It's a lot of different patches, all across the tree due to some api
  changes and lots of debugfs cleanups.

  Other than the debugfs cleanups, in this set of changes we have:

   - bus iteration function cleanups

   - scripts/get_abi.pl tool to display and parse Documentation/ABI
     entries in a simple way

   - cleanups to Documenatation/ABI/ entries to make them parse easier
     due to typos and other minor things

   - default_attrs use for some ktype users

   - driver model documentation file conversions to .rst

   - compressed firmware file loading

   - deferred probe fixes

  All of these have been in linux-next for a while, with a bunch of
  merge issues that Stephen has been patient with me for"

* tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (102 commits)
  debugfs: make error message a bit more verbose
  orangefs: fix build warning from debugfs cleanup patch
  ubifs: fix build warning after debugfs cleanup patch
  driver: core: Allow subsystems to continue deferring probe
  drivers: base: cacheinfo: Ensure cpu hotplug work is done before Intel RDT
  arch_topology: Remove error messages on out-of-memory conditions
  lib: notifier-error-inject: no need to check return value of debugfs_create functions
  swiotlb: no need to check return value of debugfs_create functions
  ceph: no need to check return value of debugfs_create functions
  sunrpc: no need to check return value of debugfs_create functions
  ubifs: no need to check return value of debugfs_create functions
  orangefs: no need to check return value of debugfs_create functions
  nfsd: no need to check return value of debugfs_create functions
  lib: 842: no need to check return value of debugfs_create functions
  debugfs: provide pr_fmt() macro
  debugfs: log errors when something goes wrong
  drivers: s390/cio: Fix compilation warning about const qualifiers
  drivers: Add generic helper to match by of_node
  driver_find_device: Unify the match function with class_find_device()
  bus_find_device: Unify the match callback with class_find_device
  ...

driver_find_device: Unify the match function with class_find_device()

2019-06-24T03:22:31+00:00

The driver_find_device() accepts a match function pointer to
filter the devices for lookup, similar to bus/class_find_device().
However, there is a minor difference in the prototype for the
match parameter for driver_find_device() with the now unified
version accepted by {bus/class}_find_device(), where it doesn't
accept a "const" qualifier for the data argument. This prevents
us from reusing the generic match functions for driver_find_device().

For this reason, change the prototype of the driver_find_device() to
make the "match" parameter in line with {bus/class}_find_device()
and adjust its callers to use the const qualifier. Also, we could
now promote the "data" parameter to const as we pass it down
as a const parameter to the match functions.

Cc: Corey Minyard 
Cc: Russell King 
Cc: Thierry Reding 
Cc: Greg Kroah-Hartman 
Cc: "Rafael J. Wysocki" 
Cc: Will Deacon 
Cc: Joerg Roedel 
Cc: Peter Oberparleiter 
Cc: Sebastian Ott 
Cc: David Airlie 
Cc: Daniel Vetter 
Cc: Nehal Shah 
Cc: Shyam Sundar S K 
Cc: Lee Jones 
Cc: Christian Borntraeger 
Signed-off-by: Suzuki K Poulose 
Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282

2019-06-05T15:36:37+00:00

Based on 1 normalized pattern(s):

  this software is licensed under the terms of the gnu general public
  license version 2 as published by the free software foundation and
  may be copied distributed and modified under those terms this
  program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 285 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de
Signed-off-by: Greg Kroah-Hartman

amba: tegra-ahb: Mark PM functions as __maybe_unused

2019-05-08T12:40:39+00:00

clang warns about an unused variable when CONFIG_PM is disabled, since
it is only referenced from an #ifdef:

drivers/amba/tegra-ahb.c:97:18: error: variable 'tegra_ahb_gizmo' is not needed and will not be emitted [-Werror,-Wunneeded-internal-declaration]

Rather than trying to get the #ifdef right, remove it and use
__maybe_unused here, which is less error prone.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Thierry Reding

ARM: 8334/1: amba: tegra-ahb: detect and correct bogus base address

2015-04-02T09:03:55+00:00

amba: tegra-ahb: detect and correct bogus base address

From a hardware SoC integration point of view, the starting address of
this IP block in the existing Tegra SoC DT files is off by 4 bytes
from the actual base address.  Since we attempt to make old DT files
forward-compatible with newer kernels, we cannot fix the IP block base
address in old DT data. This patch works around the problem by
detecting the four byte base address offset in the driver code, and
correcting it if it's detected.  (In general, IP block base addresses
almost always have a null low byte.)

Future SoC DT data for Tegra AHB should use the correct Tegra AHB base
address, in cases where there is no DT data backward compatibility
requirement.

This patch is a revision of the patch originally titled
"amba: tegra-ahb: use correct base address for future chip support".
This revision implements changes requested by Russell King:

http://marc.info/?l=linux-tegra&m=142658851825062&w=2
http://marc.info/?l=linux-tegra&m=142658873925178&w=2

Signed-off-by: Paul Walmsley 
Cc: Paul Walmsley 
Cc: Alexandre Courbot 
Cc: Hiroshi DOYU 
Cc: Stephen Warren 
Cc: Thierry Reding 
Cc: linux-kernel@vger.kernel.org
Acked-by: Stephen Warren 
Signed-off-by: Russell King

ARM: 8333/1: amba: tegra-ahb: fix register offsets in the macros

2015-04-02T09:03:55+00:00

amba: tegra-ahb: fix register offsets in the macros

From a hardware SoC integration point of view, the offsets of the
Tegra AHB registers that are currently defined in tegra-ahb.c macros
are all off by four bytes.  Similarly, the starting address of this IP
block in our existing DT files is also off by four bytes.  Since we
attempt to make old DT files forward-compatible with newer kernels, we
cannot fix the IP block base address in old DT data.  However, we can
fix the offsets in the driver so that they are correct with respect to
the hardware, which is what this patch does.  And a subsequent patch
will allow the offset to be removed for DT 'compatible' strings used
in future DT files for newer Tegra chips that the kernel does not yet
support.

Signed-off-by: Paul Walmsley 
Cc: Paul Walmsley 
Cc: Alexandre Courbot 
Cc: Hiroshi DOYU 
Cc: Stephen Warren 
Cc: Thierry Reding 
Cc: linux-kernel@vger.kernel.org
Acked-by: Stephen Warren 
Signed-off-by: Russell King

amba: drop owner assignment from platform_drivers

2014-10-20T14:20:16+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

ARM: tegra: Move includes to include/soc/tegra

2014-07-17T11:26:47+00:00

In order to not clutter the include/linux directory with SoC specific
headers, move the Tegra-specific headers out into a separate directory.

Signed-off-by: Thierry Reding