commit 4198a9b571065978632276264e01d71d68000ac5 upstream.
When in the list_for_each_entry iteration, reload of p->state->settings
with a local setting from old_state will turn the list iteration into an
infinite loop.
The typical symptom when the issue happens, will be a printk message like:
"not freeing pin xx (xxx) as part of deactivating group xxx - it is
already used for some other setting".
This is a compiler-dependent problem, one instance occurred using Clang
version 10.0 on the arm64 architecture with linux version 4.19.
Fixes: 6e5e959dde ("pinctrl: API changes to support multiple states per device")
Signed-off-by: Maria Yu <quic_aiquny@quicinc.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20231115102824.23727-1-quic_aiquny@quicinc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The code in find_pinctrl() takes a mutex and traverses a list of pinctrl
structures. Later the caller bumps up reference count on the found
structure. Such pattern is not safe as pinctrl that was found may get
deleted before the caller gets around to increasing the reference count.
Fix this by taking the reference count in find_pinctrl(), while it still
holds the mutex.
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/ZQs1RgTKg6VJqmPs@google.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
pinctrl_register_one_pin() doesn't check the result of radix_tree_insert()
despite they both may return a negative error code. Linus Walleij said he
has copied the radix tree code from kernel/irq/ where the functions calling
radix_tree_insert() are *void* themselves; I think it makes more sense to
propagate the errors from radix_tree_insert() upstream if we can do that...
Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/20230719202253.13469-3-s.shtylyov@omp.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
pinctrl_generic_add_group() doesn't check the result of radix_tree_insert()
despite they both may return a negative error code. Linus Walleij said he
has copied the radix tree code from kernel/irq/ where the functions calling
radix_tree_insert() are *void* themselves; I think it makes more sense to
propagate the errors from radix_tree_insert() upstream if we can do that...
Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/20230719202253.13469-2-s.shtylyov@omp.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The asm-generic/gpio.h file is now always included when
using gpiolib, so just move its contents into linux/gpio.h
with a few minor simplifications.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
The gpio_to_chip() function refers to the global GPIO numberspace
which is a problem we want to get rid of. Get this function out
of the header and open code it into gpiolib with appropriate FIXME
notices so no new users appear in the kernel.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
First of all, while for_each_maps() is private to pin control subsystem
it's still better to have it put into a namespace.
Besides that, users are not relying on iterator variable, so hide it
inside for-loop.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221111120048.42968-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
There is a few things done:
- include only the headers we are direct user of
- when pointer is in use, provide a forward declaration
- add missing headers
- group generic headers and subsystem headers
- sort each group alphabetically
While at it, fix some awkward indentations.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Core changes:
- Add infrastructure for per-parent interrupt data to support
the Apple pin controller.
New drivers:
- New combined pin control and GPIO driver for the Apple SoC.
This is used in all modern Apple silicon such as the M1
laptops but also in at least recent iPhone variants.
- New subdriver for the Qualcomm SM6350
- New subdriver for the Qualcomm QCM2290
- New subdriver for the Qualcomm PM6350
- New subdriver for the Uniphier NX1
- New subdriver for the Samsung ExynosAutoV9
- New subdriver for the Mediatek MT7986
- New subdriver for the nVidia Tegra194
Improvements:
- Improve power management in the Mediatek driver.
- Improvements to the Renesas internal consistency checker.
- Convert the Rockchip pin control device tree bindings to YAML.
- Finally convert the Qualcomm PMIC SSBI and SPMI MPP GPIO
driver to use hierarchical interrupts.
- Convert the Qualcomm PMIC MPP device tree bindings to YAML.
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Merge tag 'pinctrl-v5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij:
"The most interesting aspect is that we now have initial support for
the Apple pin controller as used in the M1 laptops and the iPhones
which is a step forward for using Linux efficiently on this Apple
silicon.
Core changes:
- Add infrastructure for per-parent interrupt data to support the
Apple pin controller.
New drivers:
- New combined pin control and GPIO driver for the Apple SoC. This is
used in all modern Apple silicon such as the M1 laptops but also in
at least recent iPhone variants.
- New subdriver for the Qualcomm SM6350
- New subdriver for the Qualcomm QCM2290
- New subdriver for the Qualcomm PM6350
- New subdriver for the Uniphier NX1
- New subdriver for the Samsung ExynosAutoV9
- New subdriver for the Mediatek MT7986
- New subdriver for the nVidia Tegra194
Improvements:
- Improve power management in the Mediatek driver.
- Improvements to the Renesas internal consistency checker.
- Convert the Rockchip pin control device tree bindings to YAML.
- Finally convert the Qualcomm PMIC SSBI and SPMI MPP GPIO driver to
use hierarchical interrupts.
- Convert the Qualcomm PMIC MPP device tree bindings to YAML"
* tag 'pinctrl-v5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (55 commits)
pinctrl: add pinctrl/GPIO driver for Apple SoCs
dt-bindings: pinctrl: Add apple,npins property to apple,pinctrl
dt-bindings: pinctrl: add #interrupt-cells to apple,pinctrl
gpio: Allow per-parent interrupt data
pinctrl: tegra: Fix warnings and error
pinctrl: intel: Kconfig: Add configuration menu to Intel pin control
pinctrl: tegra: Use correct offset for pin group
pinctrl: core: fix possible memory leak in pinctrl_enable()
pinctrl: bcm2835: Allow building driver as a module
pinctrl: equilibrium: Fix function addition in multiple groups
pinctrl: tegra: Add pinmux support for Tegra194
pinctrl: tegra: include lpdr pin properties
pinctrl: mediatek: add support for MT7986 SoC
dt-bindings: pinctrl: update bindings for MT7986 SoC
pinctrl: microchip sgpio: use reset driver
dt-bindings: pinctrl: pinctrl-microchip-sgpio: Add reset binding
dt-bindings: pinctrl: qcom,pmic-mpp: switch to #interrupt-cells
pinctrl: qcom: spmi-mpp: add support for hierarchical IRQ chip
pinctrl: qcom: spmi-mpp: hardcode IRQ counts
pinctrl: qcom: ssbi-mpp: add support for hierarchical IRQ chip
...
Core changes:
- A semantic change to handle pinmux and pinconf in explicit order
while up until now we depended on the semantic order in the
device tree. The device tree is a functional programming
language and does not imply any order, so the right thing is
for the pin control core to provide these semantics.
- Add a new pinmux-select debugfs file which makes it possible to
go in and select functions for a pin manually (iteratively, at
the prompt) for debugging purposes.
- Fixes to gpio regmap handling for a new pin control driver
making use of regmap-gpio.
- Use octal permissions on debugfs files.
New drivers:
- A massive rewrite of the former custom pin control driver for
MIPS Broadcom devices to instead use the pin control subsystem.
New pin control drivers for BCM6345, BCM6328, BCM6358, BCM6362,
BCM6368, BCM63268 and BCM6318 SoC variants are implemented.
- Support for PM8350, PM8350B, PM8350C, PMK8350, PMR735A and
PMR735B in the Qualcomm PMIC GPIO driver. Also the two GPIOs
on PM8008 are supported.
- Support for the Rockchip RK3568/RK3566 pin controller.
- Support for Ingenic JZ4730, JZ4750, JZ4755, JZ4775 and
X2000.
- Support for Mediatek MTK8195.
- Add a new Xilinx ZynqMP pin control driver.
Driver improvements and non-urgent fixes:
- Modularization and improvements of the Rockchip drivers.
- Some new pins added to the description of new Renesas SoCs.
- Clarifications of the GPIO base calculation in the Intel driver.
- Fix the function names for the MPP54 and MPP55 pins in the Armada
CP110 pin controller.
- GPIO wakeup interrupt map for Qualcomm SC7280 and SM8350.
- Support for ACPI probing of the Qualcomm SC8180x.
- Fix interrupt clear status on rockchip
- Fix some missing pins on the Ingenic JZ4770, some semantic
fixes for the behaviour of the Ingenic pin controller.
Add DMIC pins for JZ4780, X1000, X1500 and X1830.
- A slew of janitorial like of_node_put() calls.
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Merge tag 'pinctrl-v5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij:
"There is a lot going on!
Core changes:
- A semantic change to handle pinmux and pinconf in explicit order
while up until now we depended on the semantic order in the device
tree. The device tree is a functional programming language and does
not imply any order, so the right thing is for the pin control core
to provide these semantics.
- Add a new pinmux-select debugfs file which makes it possible to go
in and select functions for a pin manually (iteratively, at the
prompt) for debugging purposes.
- Fixes to gpio regmap handling for a new pin control driver making
use of regmap-gpio.
- Use octal permissions on debugfs files.
New drivers:
- A massive rewrite of the former custom pin control driver for MIPS
Broadcom devices to instead use the pin control subsystem. New pin
control drivers for BCM6345, BCM6328, BCM6358, BCM6362, BCM6368,
BCM63268 and BCM6318 SoC variants are implemented.
- Support for PM8350, PM8350B, PM8350C, PMK8350, PMR735A and PMR735B
in the Qualcomm PMIC GPIO driver. Also the two GPIOs on PM8008 are
supported.
- Support for the Rockchip RK3568/RK3566 pin controller.
- Support for Ingenic JZ4730, JZ4750, JZ4755, JZ4775 and X2000.
- Support for Mediatek MTK8195.
- Add a new Xilinx ZynqMP pin control driver.
Driver improvements and non-urgent fixes:
- Modularization and improvements of the Rockchip drivers.
- Some new pins added to the description of new Renesas SoCs.
- Clarifications of the GPIO base calculation in the Intel driver.
- Fix the function names for the MPP54 and MPP55 pins in the Armada
CP110 pin controller.
- GPIO wakeup interrupt map for Qualcomm SC7280 and SM8350.
- Support for ACPI probing of the Qualcomm SC8180x.
- Fix interrupt clear status on rockchip
- Fix some missing pins on the Ingenic JZ4770, some semantic fixes
for the behaviour of the Ingenic pin controller. Add DMIC pins for
JZ4780, X1000, X1500 and X1830.
- A slew of janitorial like of_node_put() calls"
* tag 'pinctrl-v5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (99 commits)
pinctrl: Add Xilinx ZynqMP pinctrl driver support
firmware: xilinx: Add pinctrl support
pinctrl: rockchip: do coding style for mux route struct
pinctrl: Add PIN_CONFIG_MODE_PWM to enum pin_config_param
pinctrl: Introduce MODE group in enum pin_config_param
pinctrl: Keep enum pin_config_param ordered by name
dt-bindings: pinctrl: Add binding for ZynqMP pinctrl driver
pinctrl: core: Fix kernel doc string for pin_get_name()
pinctrl: mediatek: use spin lock in mtk_rmw
pinctrl: add drive for I2C related pins on MT8195
pinctrl: add pinctrl driver on mt8195
dt-bindings: pinctrl: mt8195: add pinctrl file and binding document
pinctrl: Ingenic: Add pinctrl driver for X2000.
pinctrl: Ingenic: Add pinctrl driver for JZ4775.
pinctrl: Ingenic: Add pinctrl driver for JZ4755.
pinctrl: Ingenic: Add pinctrl driver for JZ4750.
pinctrl: Ingenic: Add pinctrl driver for JZ4730.
dt-bindings: pinctrl: Add bindings for new Ingenic SoCs.
pinctrl: Ingenic: Reformat the code.
pinctrl: Ingenic: Add DMIC pins support for Ingenic SoCs.
...
The commit f1b206cf7c ("pinctrl: core: print gpio in pins debugfs file")
enabled GPIO pin number and label in debugfs for pin controller. However,
it limited that feature to the chips where base is positive number. This,
in particular, excluded chips where base is 0 for the historical or backward
compatibility reasons. Refactor the code to include the latter as well.
Fixes: f1b206cf7c ("pinctrl: core: print gpio in pins debugfs file")
Cc: Drew Fustini <drew@beagleboard.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Drew Fustini <drew@beagleboard.org>
Reviewed-by: Drew Fustini <drew@beagleboard.org>
Link: https://lore.kernel.org/r/20210415130356.15885-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The kernel doc string mistakenly advertises the pin_get_name_from_id().
Fix it, otherwise kernel doc validator is not happy:
.../core.c:168: warning: expecting prototype for pin_get_name_from_id(). Prototype was for pin_get_name() instead
Fixes: dcb5dbc305 ("pinctrl: show pin name for pingroups in sysfs")
Cc: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210415123521.86894-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Static analyzer tool found that the ret variable is not initialized but
code expects ret value >=0 when pinconf is skipped in the first pinmux
loop. The same expectation is for pinmux in a pinconf loop.
That's why initialize ret to 0 to avoid uninitialized ret value in first
loop or reusing ret value from first loop in second.
Addresses-Coverity: ("Uninitialized variables")
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/e5203bae68eb94b4b8b4e67e5e7b4d86bb989724.1615534291.git.michal.simek@xilinx.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Right now the handling order depends on how entries are coming which is
corresponding with order in DT. We have reached the case with DT overlays
where conf and mux descriptions are exchanged which ends up in sequence
that firmware has been asked to perform configuration before requesting the
pin.
The patch is enforcing the order that pin is requested all the time first
followed by pin configuration. This change will ensure that firmware gets
requests in the right order.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/cfbe01f791c2dd42a596cbda57e15599969b57aa.1615364211.git.michal.simek@xilinx.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Switch over pinctrl debugfs files to use octal permissions as they are
preferred over symbolic permissions. Refer to commit f90774e1fd
("checkpatch: look for symbolic permissions and suggest octal instead").
Note: S_IFREG flag is added to the mode by __debugfs_create_file()
in fs/debugfs/inode.c
Suggested-by: Joe Perches <joe@perches.com>
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Link: https://lore.kernel.org/r/20210302053059.1049035-2-drew@beagleboard.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Remove all empty lines at the end of functions in pinctrl subsystem,
and make the code neat.
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Zhaoyu Liu <zackaryliu@yeah.net>
Link: https://lore.kernel.org/r/X98NP6NFK1Afzrgd@manjaro
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Most are likely due to bitrot/API slip. Some are formatting issues.
Fixes the following W=1 kernel build warning(s):
drivers/pinctrl/core.c:167: warning: Function parameter or member 'pin' not described in 'pin_get_name'
drivers/pinctrl/core.c:167: warning: Excess function parameter 'name' description in 'pin_get_name'
drivers/pinctrl/core.c:584: warning: Function parameter or member 'selector' not described in 'pinctrl_generic_get_group'
drivers/pinctrl/core.c:584: warning: Excess function parameter 'gselector' description in 'pinctrl_generic_get_group'
drivers/pinctrl/core.c:1356: error: Cannot parse struct or union!
drivers/pinctrl/core.c:1458: warning: Function parameter or member 'map' not described in 'pinctrl_unregister_mappings'
drivers/pinctrl/core.c:1458: warning: Excess function parameter 'maps' description in 'pinctrl_unregister_mappings'
drivers/pinctrl/core.c:2239: warning: Function parameter or member 'pctldev' not described in 'devm_pinctrl_register_and_init'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200713144930.1034632-12-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
There are no core changes this time, only driver developments.
- New driver for the Dialog Semiconductor DA9062 Power Management
Integrated Circuit (PMIC).
- Renesas SH-PFC has improved consistency, with group and
register checks in the configuration checker.
- New subdriver for the Qualcomm IPQ6018.
- Add the RGMII pin control functionality to Qualcomm IPQ8064.
- Performance and code quality cleanups in the Mediatek
driver.
- Improve the Broadcom BCM2835 support to cover all the GPIOs
that exist in it.
- The Allwinner/Sunxi driver properly masks non-wakeup IRQs on
suspend.
- Add some missing groups and functions to the Ingenic driver.
- Convert some of the Freescale device tree bindings to use the
new and all improved JSON YAML markup.
- Refactorings and support for the SFIO/GPIO in the Tegra194
SoC driver.
- Support high impedance mode in the Spreadtrum/Unisoc driver.
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Merge tag 'pinctrl-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij:
"This is the bulk of pin control changes for the v5.7 kernel cycle.
There are no core changes this time, only driver developments:
- New driver for the Dialog Semiconductor DA9062 Power Management
Integrated Circuit (PMIC).
- Renesas SH-PFC has improved consistency, with group and register
checks in the configuration checker.
- New subdriver for the Qualcomm IPQ6018.
- Add the RGMII pin control functionality to Qualcomm IPQ8064.
- Performance and code quality cleanups in the Mediatek driver.
- Improve the Broadcom BCM2835 support to cover all the GPIOs that
exist in it.
- The Allwinner/Sunxi driver properly masks non-wakeup IRQs on
suspend.
- Add some missing groups and functions to the Ingenic driver.
- Convert some of the Freescale device tree bindings to use the new
and all improved JSON YAML markup.
- Refactorings and support for the SFIO/GPIO in the Tegra194 SoC
driver.
- Support high impedance mode in the Spreadtrum/Unisoc driver"
* tag 'pinctrl-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (64 commits)
pinctrl: qcom: fix compilation error
pinctrl: qcom: use scm_call to route GPIO irq to Apps
pinctrl: sprd: Add pin high impedance mode support
pinctrl: sprd: Use the correct pin output configuration
pinctrl: tegra: Add SFIO/GPIO programming on Tegra194
pinctrl: tegra: Renumber the GG.0 and GG.1 pins
pinctrl: tegra: Do not add default pin range on Tegra194
pinctrl: tegra: Pass struct tegra_pmx for pin range check
pinctrl: tegra: Fix "Scmitt" -> "Schmitt" typo
pinctrl: tegra: Fix whitespace issues for improved readability
pinctrl: mediatek: Use scnprintf() for avoiding potential buffer overflow
pinctrl: freescale: drop the dependency on ARM64 for i.MX8M
Revert "pinctrl: mvebu: armada-37xx: use use platform api"
dt-bindings: pinctrl: at91: Fix a typo ("descibe")
pinctrl: meson: add tsin pinctrl for meson gxbb/gxl/gxm
pinctrl: sprd: Fix the kconfig warning
pinctrl: ingenic: add hdmi-ddc pin control group
pinctrl: sirf/atlas7: Replace zero-length array with flexible-array member
pinctrl: sprd: Allow the SPRD pinctrl driver building into a module
pinctrl: Export some needed symbols at module load time
...
kref_init starts with the reference count at 1, which will be balanced
by the pinctrl_put in pinctrl_unregister. The additional kref_get in
pinctrl_claim_hogs will increase this count to 2 and cause the hogs to
not get freed when pinctrl_unregister is called.
Fixes: 6118714275 ("pinctrl: core: Fix pinctrl_register_and_init() with pinctrl_enable()")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200228154142.13860-1-ckeepax@opensource.cirrus.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Currently only the drivers/pinctrl/devicetree.c code allows registering
pinctrl-mappings which may later be unregistered, all other mappings
are assumed to be permanent.
Non-dt platforms may also want to register pinctrl mappings from code which
is build as a module, which requires being able to unregister the mapping
when the module is unloaded to avoid dangling pointers.
To allow unregistering the mappings the devicetree code uses 2 internal
functions: pinctrl_register_map and pinctrl_unregister_map.
pinctrl_register_map allows the devicetree code to tell the core to
not memdup the mappings as it retains ownership of them and
pinctrl_unregister_map does the unregistering, note this only works
when the mappings where not memdupped.
The only code relying on the memdup/shallow-copy done by
pinctrl_register_mappings is arch/arm/mach-u300/core.c this commit
replaces the __initdata with const, so that the shallow-copy is no
longer necessary.
After that we can get rid of the internal pinctrl_unregister_map function
and just use pinctrl_register_mappings directly everywhere.
This commit also renames pinctrl_unregister_map to
pinctrl_unregister_mappings so that its naming matches its
pinctrl_register_mappings counter-part and exports it.
Together these 2 changes will allow non-dt platform code to
register pinctrl-mappings from modules without breaking things on
module unload (as they can now unregister the mapping on unload).
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20191216205122.1850923-2-hdegoede@redhat.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
It has turned out that some mmc host drivers, but perhaps also others
drivers, needs to reset the pinctrl into the default state
(PINCTRL_STATE_DEFAULT). However, they can't use the existing
pinctrl_pm_select_default_state(), as that requires CONFIG_PM to be set.
This leads to open coding, as they need to look up the default state
themselves and then select it.
To avoid the open coding, let's introduce pinctrl_select_default_state()
and make it available independently of CONFIG_PM. As a matter of fact, this
makes it more consistent with the behaviour of the driver core, as it
already tries to looks up the default state during probe.
Going forward, users of pinctrl_pm_select_default_state() are encouraged to
move to pinctrl_select_default_state(), so the old API can be removed.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20191206170821.29711-2-ulf.hansson@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The user space like gpioinfo only see the GPIO usage but not the
MUX usage (e.g. I2C or SPI usage) of a pin. As a user we want
to know which pin is free/safe to use. So take the MUX usage of
strict pinmux controllers into account to get a more realistic
view for ioctl GPIO_GET_LINEINFO_IOCTL.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Ramon Fried <rfried.dev@gmail.com>
Signed-off-by: Ramon Fried <rfried.dev@gmail.com>
Link: https://lore.kernel.org/r/20190814110035.13451-1-ramon.fried@linux.intel.com
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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.
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Merge tag 'pinctrl-v5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
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
...
This function was used by pin_request() to pointlessly double-check
the pin validity, and it was the only user ever.
Since commit d2f6a1c6fb ("pinctrl: remove double pin validity
check."), no one has ever used it.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The iterator is initialized in list_for_each_entry().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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 <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hogs would create circular device links, so do not link
the device to itself.
Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
A pin controller may want to create a link between itself
and its clients to be sure of suspend/resume call ordering.
Introduce link_consumers field in pinctrl_desc structure to let
pinctrl core knows that controller expect to create a link.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
[Renamed create_link to link_consumers]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Some drivers, for example, QCOM's qdf2xxx, set groups[gpio].name only
when gpio is valid, and leave invalid gpio names as null.
If we want to access the sys node "pinconf-groups",
pinctrl_get_group_selector() -> get_group_name() may return a null
pointer if group_selector is invalid, then the below Kernel panic
would happen since strcmp() uses this null pointer to do comparison.
Unable to handle kernel NULL pointer dereference at ss 00000000
el:Internal error: Oops: 9600000[ 143.080279]
SMP
CPU: 19 PID: 2493 Comm: read_all Tainted: G O
.aarch64 #1
Hardware name: HXT Semiconductor HXT REP-2 System
PC is at strcmp+0x18/0x154
LR is at pinctrl_get_group_selector+0x6c/0xe8
Process read_all (pid: 2493, stack limit =
Call trace:
Exception stack
strcmp+0x18/0x154
pin_config_group_get+0x64/0xd8
pinconf_generic_dump_one+0xd8/0x1c0
pinconf_generic_dump_pins+0x94/0xc8
pinconf_groups_show+0xb4/0x104
seq_read+0x178/0x464
full_proxy_read+0x6c/0xac
__vfs_read+0x58/0x178
vfs_read+0x94/0x164
SyS_read+0x60/0xc0
__sys_trace_return+0x0/0x4
--[ end trace]--
Kernel panic - not syncing: Fatal exception
Signed-off-by: Yanjiang Jin <yanjiang.jin@hxt-semitech.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We must return the selector from pinctrl_generic_add_group() so
pin controller device drivers can remove the right group if needed
for deferred probe for example. And we now must make sure that a
proper name is passed so we can use it to check if the entry already
exists.
Note that fixes are also needed for the pin controller drivers to
use the selector value.
Fixes: c7059c5ac7 ("pinctrl: core: Add generic pinctrl functions
for managing groups")
Reported-by: H. Nikolaus Schaller <hns@goldelico.com>
Cc: Christ van Willegen <cvwillegen@gmail.com>
Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-By: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Systems that don't have devicetree need pinctrl_register_mappings.
It should be EXPORT_SYMBOL_GPL so that it can be called from
pinctrl drivers built as modules.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
...instead of open coding file operations followed by custom ->open()
callbacks per each attribute.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a bit more involved because the pinctrl core so far always
assumed that one device (with a unique dev_name) only contains a single
pinctrl thing. This is not true for the mcp23s08 driver for chips
connected over SPI. They have a "logical address" which means that
several chips can share one physical CS signal.
A downside of this patch are some possibly ugly names for the debugfs
entries, such as "spi1.1-mcp23xxx-pinctrl.2", etc.
Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In case a platform only defaults a "default" set of pins, but not a
"sleep" set of pins, and this particular platform suspends and resumes
in a way that the pin states are not preserved by the hardware, when we
resume, we would call pinctrl_single_resume() -> pinctrl_force_default()
-> pinctrl_select_state() and the first thing we do is check that the
pins state is the same as before, and do nothing.
In order to fix this, decouple the actual state change from
pinctrl_select_state() and move it pinctrl_commit_state(), while keeping
the p->state == state check in pinctrl_select_state() not to change the
caller assumptions. pinctrl_force_sleep() and pinctrl_force_default()
are updated to bypass the state check by calling pinctrl_commit_state().
[Linus Walleij]
The forced pin control states are currently only used in some pin
controller drivers that grab their own reference to their own pins.
This is equal to the pin control hogs: pins taken by pin control
devices since there are no corresponding device in the Linux device
hierarchy, such as memory controller lines or unused GPIO lines,
or GPIO lines that are used orthogonally from the GPIO subsystem
but pincontrol-wise managed as hogs (non-strict mode, allowing
simultaneous use by GPIO and pin control). For this case forcing
the state from the drivers' suspend()/resume() callbacks makes
sense and should semantically match the name of the function.
Fixes: 6e5e959dde ("pinctrl: API changes to support multiple states per device")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The pinctrl_request_gpio() and pinctrl_free_gpio() break the nice
namespacing in the other cross-calls like pinctrl_gpio_foo().
Just rename them and all references so we have one namespace
with all cross-calls under pinctrl_gpio_*().
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Omit an extra message for a memory allocation failure in this function.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Andre Przywara <andre.przywara@arm.com> noticed that we can get the
following warning with -EPROBE_DEFER:
"WARNING: CPU: 1 PID: 89 at drivers/base/dd.c:349
driver_probe_device+0x2ac/0x2e8"
Let's fix the issue by removing the indices as suggested by
Tejun Heo <tj@kernel.org>. All we have to do here is kill the radix
tree.
I probably ended up with the indices after grepping for removal
of all entries using radix_tree_for_each_slot() and the first
match found was gmap_radix_tree_free(). Anyways, no need for
indices here, and we can just do remove all the entries using
radix_tree_for_each_slot() along how the item_kill_tree() test
case does.
Fixes: c7059c5ac7 ("pinctrl: core: Add generic pinctrl functions for managing groups")
Fixes: a76edc89b1 ("pinctrl: core: Add generic pinctrl functions for managing groups")
Reported-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
When pinctrl device registers, it automatically claims hogs, that is,
maps that pinctrl device serves for itself.
It is possible that in addition to SoC's pinctrl device, other pinctrl
devices get registered. E.g. some gpio expander devies are registered
as pinctrl devices. For such devices, pinctrl maps could be defined
that set up SoC's pins (e.g. interrupt pin for gpio expander). Such
a map will have target device set to gpio expander.
Here is device tree snippet that causes this scenario:
&i2c0 {
sx1503@20 {
compatible = "semtech,sx1503q";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sx1503_20>;
...
};
};
...
&iomuxc {
pinctrl_sx1503_20: pinctrl-sx1503-20 {
fsl,pins = <
VF610_PAD_PTB1__GPIO_23 0x219d
>;
};
};
Such a map will have target device set to gpio expander. However is not
a hog, it is a regular map that is claimed by core before gpio expander
device is probed.
Thus when looking for hogs, it is not enough to check that map's target
device is set to pinctrl device being registered. Need also check that
map's control device is also set to the same.
Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Maria Yu