linux-toradex.git/include/linux/mfd/syscon.h, branch v6.4-rc1

mfd: syscon: Add syscon_regmap_lookup_by_phandle_optional() function.

2020-11-19T08:30:11+00:00

This adds syscon_regmap_lookup_by_phandle_optional() function to get an
optional regmap.

It behaves the same as syscon_regmap_lookup_by_phandle() except where
there is no regmap phandle. In this case, instead of returning -ENODEV,
the function returns NULL. This makes error checking simpler when the
regmap phandle is optional.

Suggested-by: Nicolas Boichat 
Signed-off-by: Enric Balletbo i Serra 
Reviewed-by: Matthias Brugger 
Reviewed-by: Arnd Bergmann 
Signed-off-by: Lee Jones

mfd: syscon: Fix syscon_regmap_lookup_by_phandle_args() dummy

2020-02-03T08:39:49+00:00

If CONFIG_MFD_SYSCON=n:

    include/linux/mfd/syscon.h:54:23: warning: ‘syscon_regmap_lookup_by_phandle_args’ defined but not used [-Wunused-function]

Fix this by adding the missing inline keyword.

Fixes: 6a24f567af4accef ("mfd: syscon: Add arguments support for syscon reference")
Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Lee Jones

mfd: syscon: Add arguments support for syscon reference

2020-01-24T07:33:59+00:00

There are a lot of similar global registers being used across multiple SoCs
from Unisoc. But most of these registers are assigned with different offset
for different SoCs. It is hard to handle all of them in an all-in-one
kernel image.

Add a helper function to get regmap with arguments where we could put some
extra information such as the offset value.

Signed-off-by: Orson Zhai 
Tested-by: Baolin Wang 
Reviewed-by: Arnd Bergmann 
Signed-off-by: Lee Jones

mfd/syscon: Add device_node_to_regmap()

2019-08-08T22:30:07+00:00

device_node_to_regmap() is exactly like syscon_node_to_regmap(), but it
does not check that the node is compatible with "syscon", and won't
attach the first clock it finds to the regmap.

The rationale behind this, is that one device node with a standard
compatible string "foo,bar" can be covered by multiple drivers sharing a
regmap, or by a single driver doing all the job without a regmap, but
these are implementation details which shouldn't reflect on the
devicetree.

Signed-off-by: Paul Cercueil 
Acked-by: Arnd Bergmann 
Signed-off-by: Paul Burton 
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: Jonathan Corbet 
Cc: Lee Jones 
Cc: Daniel Lezcano 
Cc: Thomas Gleixner 
Cc: Michael Turquette 
Cc: Stephen Boyd 
Cc: Jason Cooper 
Cc: Marc Zyngier 
Cc: Rob Herring 
Cc: Mark Rutland 
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Cc: od@zcrc.me
Cc: Mathieu Malaterre

mfd: Remove unused helper syscon_regmap_lookup_by_pdevname

2019-06-24T03:22:30+00:00

Nobody uses the exported helper syscon_regmap_lookup_by_pdevname,
to lookup a device by name. Let us remove it.

Suggested-by: Arnd Bergman 
Cc: Arnd Bergman 
Cc: Greg Kroah-Hartman 
Cc: "Rafael J. Wysocki" 
Signed-off-by: Suzuki K Poulose 
Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman

mfd: syscon: Include errno.h from header

2016-04-11T12:31:40+00:00

The syscon header uses the ENOTSUPP error constant, but doesn't
include the header that defines it. This causes a build error
after the imx pinctrl driver started using syscon:

include/linux/mfd/syscon.h: In function 'syscon_node_to_regmap':
include/linux/mfd/syscon.h:32:18: error: 'ENOTSUPP' undeclared (first use in this function)
  return ERR_PTR(-ENOTSUPP);
                  ^~~~~~~~

This adds the missing #include.

Signed-off-by: Arnd Bergmann 
Fixes: 8626ada871f1 ("pinctrl: imx: attach iomuxc device to gpr syscon")
Signed-off-by: Lee Jones

mfd: syscon: Return ENOTSUPP instead of ENOSYS when disabled

2016-03-16T08:50:35+00:00

When CONFIG_MFD_SYSCON is disabled, have the function stubs return
ENOTSUPP to indicate the syscon functionality is not available.
There are currently no callers that depend on the ENOSYS return value.

This patchfixes a checkpatch warning:
    WARNING: ENOSYS means 'invalid syscall nr' and nothing else

Signed-off-by: Philipp Zabel 
Signed-off-by: Lee Jones

mfd: syscon: Include linux/err.h to fix build error

2014-06-03T07:11:41+00:00

commit df73de9b0d412 ("mfd: syscon: Return -ENOSYS if CONFIG_MFD_SYSCON
is not enabled") introduced fallbacks for APIs, but missed out on adding
the header file. This would work only if linux/err.h is also included
in the source code from where this file is included. It would be better
to include linux/err.h in file to remove possible build errors.

Without this patch, we get following and similar build errors if this
header file is included in some source file and CONFIG_MFD_SYSCON is
not enabled.

include/linux/mfd/syscon.h: In function ‘syscon_node_to_regmap’:
include/linux/mfd/syscon.h:30:2: error: implicit declaration of function ‘ERR_PTR’ [-Werror=implicit-function-declaration]
  return ERR_PTR(-ENOSYS);
  ^
include/linux/mfd/syscon.h:30:18: error: ‘ENOSYS’ undeclared (first use in this function)
  return ERR_PTR(-ENOSYS);
                  ^
Signed-off-by: Tushar Behera 
Signed-off-by: Lee Jones

mfd: syscon: Return -ENOSYS if CONFIG_MFD_SYSCON is not enabled

2013-10-23T15:22:35+00:00

Some platforms may not define CONFIG_MFD_SYSCON (or haven't syscon),
it can fix build error for these platforms.

Signed-off-by: Peter Chen 
Signed-off-by: Lee Jones