14 Jul, 2019
1 commit
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Pull pin control updates from Linus Walleij:
"This is the bulk of pin control changes for the v5.3 kernel cycle:Core changes:
- Device links can optionally be added between a pin control producer
and its consumers. This will affect how the system power management
is handled: a pin controller will not suspend before all of its
consumers have been suspended.This was necessary for the ST Microelectronics STMFX expander and
need to be tested on other systems as well: it makes sense to make
this default in the long run.Right now it is opt-in per driver.
- Drive strength can be specified in microamps. With decreases in
silicon technology, milliamps isn't granular enough, let's make it
possible to select drive strengths in microamps.Right now the Meson (AMlogic) driver needs this.
New drivers:
- New subdriver for the Tegra 194 SoC.
- New subdriver for the Qualcomm SDM845.
- New subdriver for the Qualcomm SM8150.
- New subdriver for the Freescale i.MX8MN (Freescale is now a product
line of NXP).- New subdriver for Marvell MV98DX1135.
Driver improvements:
- The Bitmain BM1880 driver now supports pin config in addition to
muxing.- The Qualcomm drivers can now reserve some GPIOs as taken aside and
not usable for users. This is used in ACPI systems to take out some
GPIO lines used by the BIOS so that noone else (neither kernel nor
userspace) will play with them by mistake and crash the machine.- A slew of refurbishing around the Aspeed drivers (board management
controllers for servers) in preparation for the new Aspeed AST2600
SoC.- A slew of improvements over the SH PFC drivers as usual.
- Misc cleanups and fixes"
* tag 'pinctrl-v5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (106 commits)
pinctrl: aspeed: Strip moved macros and structs from private header
pinctrl: aspeed: Fix missed include
pinctrl: baytrail: Use GENMASK() consistently
pinctrl: baytrail: Re-use data structures from pinctrl-intel.h
pinctrl: baytrail: Use defined macro instead of magic in byt_get_gpio_mux()
pinctrl: qcom: Add SM8150 pinctrl driver
dt-bindings: pinctrl: qcom: Add SM8150 pinctrl binding
dt-bindings: pinctrl: qcom: Document missing gpio nodes
pinctrl: aspeed: Add implementation-related documentation
pinctrl: aspeed: Split out pinmux from general pinctrl
pinctrl: aspeed: Clarify comment about strapping W1C
pinctrl: aspeed: Correct comment that is no longer true
MAINTAINERS: Add entry for ASPEED pinctrl drivers
dt-bindings: pinctrl: aspeed: Convert AST2500 bindings to json-schema
dt-bindings: pinctrl: aspeed: Convert AST2400 bindings to json-schema
dt-bindings: pinctrl: aspeed: Split bindings document in two
pinctrl: qcom: Add irq_enable callback for msm gpio
pinctrl: madera: Fixup SPDX headers
pinctrl: qcom: sdm845: Fix CONFIG preprocessor guard
pinctrl: tegra: Add bitmask support for parked bits
...
31 May, 2019
1 commit
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Based on 1 normalized pattern(s):
license terms gnu general public license gpl version 2
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 161 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Alexios Zavras
Reviewed-by: Steve Winslow
Reviewed-by: Richard Fontana
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de
Signed-off-by: Greg Kroah-Hartman
23 May, 2019
1 commit
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Add drive-strength-microamp property support to allow drive strength in uA
Signed-off-by: Guillaume La Roque
Signed-off-by: Linus Walleij
08 Nov, 2017
1 commit
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Some pin controllers (such as the Gemini) can control the
expected clock skew and output delay on certain pins with a
sub-nanosecond granularity. This is typically done by shunting
in a number of double inverters in front of or behind the pin.
Make it possible to configure this with a generic binding.Cc: devicetree@vger.kernel.org
Acked-by: Rob Herring
Acked-by: Hans Ulli Kroll
Signed-off-by: Linus Walleij
31 Aug, 2017
1 commit
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In some scenarios, we should set some pins as input/output/pullup/pulldown
when the specified system goes into deep sleep mode, then when the system
goes into deep sleep mode, these pins will be set automatically by hardware.That means some pins are not controlled by any specific driver in the OS, but
need to be controlled when entering sleep mode. Thus we introduce one sleep
state config into pinconf-generic for users to configure.Signed-off-by: Baolin Wang
Signed-off-by: Linus Walleij
14 Aug, 2017
1 commit
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Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.Signed-off-by: Rob Herring
Cc: Linus Walleij
Cc: Lee Jones
Cc: Stefan Wahren
Cc: Florian Fainelli
Cc: Ray Jui
Cc: Scott Branden
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Tomasz Figa
Cc: Sylwester Nawrocki
Cc: Laurent Pinchart
Cc: Barry Song
Cc: linux-gpio@vger.kernel.org
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: kernel@stlinux.com
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Acked-by: Krzysztof Kozlowski
Acked-by: Ludovic Desroches
Acked-by: Patrice Chotard
Reviewed-by: Geert Uytterhoeven
Acked-by: Geert Uytterhoeven
Acked-by: Eric Anholt
Signed-off-by: Linus Walleij
29 Jun, 2017
1 commit
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Add output-enable generic pin configuration property.
This properties allows enabling/disabling pin's output capabilities
without actually driving any value on the line.Acked-by: Rob Herring
[Added inline elaborations on buffer enabling/disabling]
Signed-off-by: Linus Walleij
22 May, 2017
1 commit
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This reverts commit 8c58f1a7a4b6d1d723bf25fef9d842d5a11200d0.
It turns out that applying these generic properties was
premature: the properties used in the driver using this
are of unclear electrical nature and the subject need to
be discussed.Signed-off-by: Linus Walleij
11 Apr, 2017
1 commit
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Add bi-directional and output-enable pin configuration properties.
bi-directional allows to specify when a pin shall operate in input and
output mode at the same time. This is particularly useful in platforms
where input and output buffers have to be manually enabled.output-enable is just syntactic sugar to specify that a pin shall
operate in output mode, ignoring the provided argument.
This pairs with input-enable pin configuration option.Signed-off-by: Jacopo Mondi
Acked-by: Rob Herring
Signed-off-by: Linus Walleij
14 Mar, 2017
1 commit
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Just fix spelling typos in comments.
Signed-off-by: Andy Shevchenko
Signed-off-by: Linus Walleij
29 Oct, 2016
1 commit
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During pinmux registration, pinmux table is parsed from DT
for making the pinmux table configuration of pins.Parse the only those node whose status is not disabled.
This will help on reusing the pin configuration table across
platform and disabling the node by status property if that node
is not needed on given platform.Signed-off-by: Laxman Dewangan
Signed-off-by: Linus Walleij
23 Jun, 2016
2 commits
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The pinconf-generic.h file exposes functions for creating generic mappings
but it does not expose a function for freeing the mappings. Add a function
for freeing generic mappings.Signed-off-by: Jon Hunter
Signed-off-by: Linus Walleij
31 May, 2016
1 commit
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To improve debugfs readability, use commas instead of whitespaces
for separating configuration parameters.For example, the "pinconf-pins" dump on my board will change as follows:
Without this commit:
# head -5 pinconf-pins
Pin config settings per pin
Format: pin (name): configs
pin 0 (ED0): input bias pull down output drive strength (8 mA) input enabled
pin 1 (ED1): input bias pull down output drive strength (8 mA) input enabled
pin 2 (ED2): input bias pull down output drive strength (8 mA) input enabledWith this commit:
# head -5 pinconf-pins
Pin config settings per pin
Format: pin (name): configs
pin 0 (ED0): input bias pull down, output drive strength (8 mA), input enabled
pin 1 (ED1): input bias pull down, output drive strength (8 mA), input enabled
pin 2 (ED2): input bias pull down, output drive strength (8 mA), input enabledSigned-off-by: Masahiro Yamada
Signed-off-by: Linus Walleij
01 Apr, 2016
1 commit
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Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map, since
it does not depend on device tree despite the current name. This
will enforce a consistent naming in pinctr-utils.c and will make
it clear it can be called from outside device tree (e.g. from
ACPI handling code).Signed-off-by: Irina Tirdea
Signed-off-by: Linus Walleij
01 Dec, 2015
1 commit
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The returned configs from pinconf_generic_parse_dt_config() is
duplicated from original. Make it clear it must be freed when no
longer necessary.Signed-off-by: Yingjoe Chen
Signed-off-by: Linus Walleij
03 Oct, 2015
2 commits
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PIN_CONFIG_INPUT_SCHMITT is defined in enum_pin_config_param,
but the corresponding DT property is missing.Signed-off-by: Masahiro Yamada
Signed-off-by: Linus Walleij -
Currently, the dt_params array in drivers/pinctrl/pinconf-generic.c
is not sorted in the same order as the enum pin_config_param in
include/linux/pinctrl/pinconf-generic.h.Sort enum pin_config_param, conf_items, dt_params, alphabetically
for consistency.Signed-off-by: Masahiro Yamada
Signed-off-by: Linus Walleij
27 Mar, 2015
2 commits
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This makes the error message much more useful.
Signed-off-by: Baruch Siach
Signed-off-by: Linus Walleij -
Make pinconf_generic_dt_node_to_map() also scan the dt pin configuration node
directly referenced by phandle, not only its child nodes.The "parent scan" feature needs a few other changes:
* Move the pinconf_generic_dt_node_to_map() error handling code to a common
place, under the 'exit' label.* Move the pins/groups strings count earlier in
pinconf_generic_dt_subnode_to_map(), to allow us to bail out early when
these properties are missing or wrongSigned-off-by: Baruch Siach
Signed-off-by: Linus Walleij
14 Jan, 2015
1 commit
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New pin controllers such as ACPI-based may also have custom properties
to parse, and should be able to use generic pin config. Let's make the
code compile on !OF systems and rename members a bit to underscore it
is custom parameters and not necessarily DT parameters.This fixes a build regression for x86_64 on the zeroday kernel builds.
Reported-by: kbuild test robot
Reviewed-and-tested-by: Soren Brinkmann
Signed-off-by: Linus Walleij
12 Jan, 2015
2 commits
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Additionally to the generic DT parameters, allow drivers to provide
driver-specific DT parameters to be used with the generic parser
infrastructure.To achieve this 'struct pinctrl_desc' is extended to pass custom pinconf
option to the core. In order to pass this kind of information, the
related data structures - 'struct pinconf_generic_dt_params',
'pin_config_item' - are moved from pinconf internals to the
pinconf-generic header.Additionally pinconfg-generic is refactored to not only iterate over the
generic pinconf parameters but also take the parameters into account
that are provided through the driver's 'struct pinctrl_desc'.
In particular 'pinconf_generic_parse_dt_config()' and
'pinconf_generic_dump' helpers are split into two parts each. In order
to have a more generic helper that can be used to process the generic
parameters as well as the driver-specific ones.v2:
- fix typo
- add missing documentation for @conf_items member in struct
- rebase to pinctrl/devel: conflict in abx500
- rename _pinconf_generic_dump() to pinconf_generic_dump_one()
- removed '_' from _parse_dt_cfg()
- removed BUG_ONs, error condition is handled in if statements
- removed pinconf_generic_dump_group() & pinconf_generic_dump_pin
helpers
- fixed up corresponding call sites
- renamed pinconf_generic_dump() to pinconf_generic_dump_pins()
- added kernel-doc to pinconf_generic_dump_pins()
- add kernel-doc
- more verbose commit messageSigned-off-by: Soren Brinkmann
Tested-by: Andreas Färber
Signed-off-by: Linus Walleij -
With the new 'groups' property, the DT parser can infer the map type
from the fact whether 'pins' or 'groups' is used to specify the pin
group to work on.To maintain backwards compatibitliy with current usage of the DT
binding, this is only done when PIN_MAP_TYPE_INVALID is passed to the
parsing function as type.Also, a new helper 'pinconf_generic_dt_node_to_map_all()' is introduced,
which can be used by drivers as generic callback for dt_node_to_map() to
leverage the new feature.Changes since v2:
- rename dt_pin_specifier to subnode_target_type
- add additional comment in header file explaining passing an invalid
map type
- mention map_all() helper in commit message
Changes since RFC v2:
- noneSigned-off-by: Soren Brinkmann
Tested-by: Andreas Färber
Signed-off-by: Linus Walleij
11 Nov, 2014
1 commit
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Signed-off-by: Soren Brinkmann
Signed-off-by: Linus Walleij
28 Oct, 2014
1 commit
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When dumping pinconf information in debugfs, config arguments are only
printed when a unit is present and the argument is != 0. For parameters
like the slew rate, this does not work. The slew rate uses a driver
specific format for the argument, i.e. 0 can be a valid argument and a
unit is not provided for it.
For that reason, add a flag to enable printing the argument instead of
inferring it from the presence of a unit and the value of the argument.Signed-off-by: Soren Brinkmann
Signed-off-by: Linus Walleij
28 May, 2014
1 commit
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Add "power-source" property to generic options used for DT parsing files.
This enables drivers, which use generic pin configurations, to get the
value passed to this property.Signed-off-by: Ivan T. Ivanov
Signed-off-by: Linus Walleij
27 May, 2014
1 commit
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This issue was reported by coccicheck using the semantic patch
at scripts/coccinelle/api/memdup.cocciSigned-off-by: Benoit Taine
Signed-off-by: Linus Walleij
16 Dec, 2013
1 commit
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This commit adds slew-rate and input-enable/disable support for pinconf
-generic.Signed-off-by: Sherman Yin
Signed-off-by: Linus Walleij
29 Aug, 2013
1 commit
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It does not make sense to show ti prefix in pinconf_generic_dt_subnode_to_map()
dev_err messages.Signed-off-by: Axel Lin
Signed-off-by: Linus Walleij
23 Aug, 2013
1 commit
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Add support to pass the config type like GROUP or PIN when using
the utils or generic pin configuration APIs. This will make the
APIs more generic.Added additional inline APIs such that it can be use directly as
callback for the pinctrl_ops.Changes from V1:
- Remove separate implementation for pins and group for
pinctrl_utils_dt_free_map and improve this function
to support both i.e. PINS and GROUPs.Signed-off-by: Laxman Dewangan
Reviewed-by: Stephen Warren
Tested-by: Stephen Warren
Signed-off-by: Linus Walleij
15 Aug, 2013
1 commit
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Add generic APIs to map the DT node and its sub node in pinconf generic
driver. These APIs can be used from driver to parse the DT node who
uses the pinconf generic APIs for defining their nodes.Changes from V1:
- Add generic property for pins and functions in pinconf-generic.
- Add APIs to map the DT and subnode.
- Move common utils APIs to the pinctrl-utils from this file.
- Update the binding document accordingly.
Changes from V2:
- Rebased the pinctrl binding doc on top of Stephen's cleanup.
- Rename properties "pinctrl-pins" and "pinctrl-function" to
"pins" and "function".Signed-off-by: Laxman Dewangan
Reviewed-by: Stephen Warren
Signed-off-by: Linus Walleij
25 Jun, 2013
2 commits
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Some options currently take arguments in unspecified driver-specific units.
As pointed out by Stephen Warren, driver specific values should not be part
of generic devicetree bindings describing the hardware.Therefore remove the critical bindings again, before they become part of
an official release.Signed-off-by: Heiko Stuebner
Reviewed-by: James Hogan
Signed-off-by: Linus Walleij -
Currently the debounce time pinconfig option uses an unspecified
"time units" unit. As pinconfig options should use SI units and a
real unit is also necessary for generic dt bindings, change it
to usec. Currently no driver is using the generic pinconfig option
for this, so the unit change is safe to do.Signed-off-by: Heiko Stuebner
Reviewed-by: James Hogan
Signed-off-by: Linus Walleij
18 Jun, 2013
3 commits
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Allocating the temorary array in pinconf_generic_parse_dt_config on stack
might cause problems later on, when the number of options grows over time.
Therefore also allocate this array dynamically to be on the safe side.Suggested-by: Laurent Pinchart
Signed-off-by: Heiko Stuebner
Reviewed-by: James Hogan
Signed-off-by: Linus Walleij -
This adds a shortcut when no valid pinconf properties are found
in the parsed dt node, to set the values immediately and return.Suggested-by: Laurent Pinchart
Signed-off-by: Heiko Stuebner
Reviewed-by: James Hogan
Signed-off-by: Linus Walleij -
The bias-pull-* options use values > 0 to indicate that the pull should
be activated and optionally also indicate the strength of the pull.
Therefore use an default value of 1 for these options.Split the low-power-mode option into low-power-enable and -disable.
Update the documentation to describe the param arguments better.
Reported-by: James Hogan
Signed-off-by: Heiko Stuebner
Signed-off-by: Linus Walleij
16 Jun, 2013
4 commits
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pinconf_generic_parse_dt_config() takes a node as input and generates an
array of generic pinconfig values from the properties of this node.As I couldn't find a mechanism to count the number of properties of a node
the function uses internally an array to accept one of parameter and copies
the real present options to a smaller variable at its end.Signed-off-by: Heiko Stuebner
Signed-off-by: Linus Walleij -
There exist controllers that don't support to set the pull to up or down
separately but instead automatically set the pull direction based on
embedded knowledge inside the controller, for example depending on the
selected mux function of the pin.Therefore this patch adds another config option to use this default
pull-state for a pin where it is not possible to know or decide if the
pin will be pulled up or down.Signed-off-by: Heiko Stuebner
Reviewed-by: Stephen Warren
Signed-off-by: Linus Walleij -
Add a new PIN_CONFIG_BIAS_BUS_HOLD pin configuration for a bus holder
pin mode (also known as bus keeper, or repeater). This is a weak latch
which drives the last value on a tristate bus. Another device on the bus
can drive the bus high or low before going tristate to change the value
driven by the pin.Signed-off-by: James Hogan
Cc: Linus Walleij
Signed-off-by: Linus Walleij -
Add the drive strength pinconf to debugfs output (with the unit "mA").
Signed-off-by: James Hogan
Cc: Linus Walleij
Signed-off-by: Linus Walleij
