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path: root/drivers/pinctrl
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2019-12-13pinctrl: lynxpoint: Relax GPIO request rulesAndy Shevchenko
A pin in native mode still can be requested as GPIO, though we assume that firmware has configured it properly, which sometimes is not the case. Here we allow turning the pin as GPIO to avoid potential issues, but issue warning that something might be wrong. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Assume 2 bits for mode selectorAndy Shevchenko
New generations can use 2 bits for mode selector. Update the code to support it. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Use standard pattern for memory allocationAndy Shevchenko
The pattern foo = kmalloc(sizeof(*foo), GFP_KERNEL); has an advantage when foo type is changed. Since we are planning a such, better to be prepared by using standard pattern for memory allocation. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Use %pR to print IO resourceAndy Shevchenko
Replace explicit casting by pointer to struct resource with specifier replacement to %pR to print the IO resource. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Drop useless assignmentAndy Shevchenko
There is no need to assign ret variable in ->probe(). Drop useless assignment. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Correct amount of pinsAndy Shevchenko
When we count from 0 it's possible to get into off-by-one error. That's what had happened to this driver. So, correct amount of pins and related typos in the code. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Use raw_spinlock for lockingAndy Shevchenko
The Intel Lynxpoint pinctrl driver implements irqchip callbacks which are called with desc->lock raw_spinlock held. In mainline this is fine because spinlock resolves to raw_spinlock. However, running the same code in -rt we will get a BUG() asserted. This is because in -rt spinlocks are preemptible so taking the driver private spinlock in irqchip callbacks causes might_sleep() to trigger. In order to keep -rt happy but at the same time make sure that register accesses get serialized, convert the driver to use raw_spinlock instead. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Move GPIO driver to pin controller folderAndy Shevchenko
Move Lynxpoint GPIO driver under Intel pin control umbrella for further transformation to a real pin control driver. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: baytrail: Reuse struct intel_pinctrl in the driverAndy Shevchenko
We may use now available struct intel_pinctrl in the driver. No functional change implied. Acked-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-13pinctrl: baytrail: Use local variable to keep device pointerAndy Shevchenko
Use local variable to keep device pointer in order to increase readability of the driver. Acked-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-13pinctrl: baytrail: Keep pointer to struct device instead of its containerAndy Shevchenko
There is no need to keep pointer to struct platform_device, which is container of struct device, because the latter is what have been used everywhere outside of ->probe() path. In any case we may derive pointer to the container when needed. Acked-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-13pinctrl: intel: Share struct intel_pinctrl for wider useAndy Shevchenko
There are few drivers for Intel SoC GPIO which may utilize the same data structure to describe this IP. Share struct intel_pinctrl for wider user. Acked-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-13pinctrl: intel: Use GPIO direction definitionsMatti Vaittinen
Use new GPIO_LINE_DIRECTION_IN and GPIO_LINE_DIRECTION_OUT when returning GPIO direction to GPIO framework. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: cherryview: Use GPIO direction definitionsMatti Vaittinen
Use new GPIO_LINE_DIRECTION_IN and GPIO_LINE_DIRECTION_OUT when returning GPIO direction to GPIO framework. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-13pinctrl: baytrail: Use GPIO direction definitionsMatti Vaittinen
Use new GPIO_LINE_DIRECTION_IN and GPIO_LINE_DIRECTION_OUT when returning GPIO direction to GPIO framework. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Acked-by: Andy Shevchenko <andriy.shevchenko@intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-13pinctrl: baytrail: Move IRQ valid mask initialization to a dedicated callbackAndy Shevchenko
There is a logical continuation of the commit 5fbe5b5883f8 ("gpio: Initialize the irqchip valid_mask with a callback") to split IRQ initialization to hardware and valid mask setup parts. Acked-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-13pinctrl: sh-pfc: Remove use of ARCH_R8A7796Geert Uytterhoeven
CONFIG_ARCH_R8A7796 was renamed to CONFIG_ARCH_R8A77960 in commit 39e57e14d7eaf818 ("soc: renesas: Add ARCH_R8A77960 for existing R-Car M3-W"), so its users can be removed. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20191211100308.6958-1-geert+renesas@glider.be
2019-12-13pinctrl: core: Add pinctrl_select_default_state() and export itUlf Hansson
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>
2019-12-13pinctrl: Modify Kconfig to fix linker errorRahul Tanwar
Fix below linker error ld: drivers/pinctrl/pinctrl-equilibrium.o: in function `pinconf_generic_dt_node_to_map_all': pinctrl-equilibrium.c:(.text+0xb): undefined reference to `pinconf_generic_dt_node_to_map' Caused by below commit 1948d5c51dba ("pinctrl: Add pinmux & GPIO controller driver for a new SoC") by adding 'depends on OF' in Kconfig driver entry. Reported-by: Randy Dunlap <rdunlap@infradead.org>> Signed-off-by: Rahul Tanwar <rahul.tanwar@linux.intel.com> Link: https://lore.kernel.org/r/ba937f271d1a2173828a2325990d62cb36d61595.1575514110.git.rahul.tanwar@linux.intel.com Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-13Merge tag 'intel-pinctrl-v5.5-2' of ↵Linus Walleij
git://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel into fixes intel-pinctrl for v5.5-2 * Fix Baytrail silicon issue by using a global lock * Fix North community pin names that user will assume their functions * Convert Cherryview and Baytrail to pass IRQ chip along with GPIO one The following is an automated git shortlog grouped by driver: baytrail: - Pass irqchip when adding gpiochip - Add GPIO <-> pin mapping ranges via callback - Update North Community pin list - Really serialize all register accesses cherryview: - Pass irqchip when adding gpiochip - Add GPIO <-> pin mapping ranges via callback - Split out irq hw-init into a separate helper function
2019-12-13pinctrl: pinmux: fix a possible null pointer in pinmux_can_be_used_for_gpioAlexandre Torgue
This commit adds a check on ops pointer to avoid a kernel panic when ops->strict is used. Indeed, on some pinctrl driver (at least for pinctrl-stmfx) the pinmux ops is not implemented. Let's assume than gpio can be used in this case. Fixes: 472a61e777fe ("pinctrl/gpio: Take MUX usage into account") Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com> Link: https://lore.kernel.org/r/20191204144106.10876-1-alexandre.torgue@st.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-13pinctrl: aspeed-g6: Add AST2600 pinconf supportJohnny Huang
The AST2600 pinconf is a little different from previous generations of ASPEED BMC SoCs in terms of architecture. The pull-down setting is per-pin setting now, and drive-strength support 4 kind of value (e.g. 4ma, 8ma, 12ma, 16ma). Signed-off-by: Johnny Huang <johnny_huang@aspeedtech.com> [AJ: Trim unused pinctrl register macros] Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20191202061432.3996-8-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-13pinctrl: aspeed: Use masks to describe pinconf bitfieldsJohnny Huang
Since some of the AST2600 pinconf setting are not just single bit, modified aspeed_pin_config @bit to @mask and add @mask to aspeed_pin_config_map to support configuring multiple bits. Signed-off-by: Johnny Huang <johnny_huang@aspeedtech.com> [AJ: Tweak commit message] Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20191202061432.3996-7-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-13pinctrl: aspeed: Move aspeed_pin_config_map to separate source fileJohnny Huang
The AST2600 pinconf differs from the 2400 and 2500, aspeed_pin_config_map should define separately, and add @confmaps and @nconfmaps to aspeed_pinctrl_data structure for that change. Signed-off-by: Johnny Huang <johnny_huang@aspeedtech.com> Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20191202061432.3996-6-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-13pinctrl: aspeed: Add ASPEED_SB_PINCONF() helperJohnny Huang
This helper macro is for declaring single bit (SB) mask pinconf, and is used to prepare for modifying aspeed_pin_config structure, the aspeed_pin_config structure @bit variable will be modified to @mask. This case is common in the AST2400/AST2500 which the mask is a single bit. Signed-off-by: Johnny Huang <johnny_huang@aspeedtech.com> Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20191202061432.3996-5-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-13pinctrl: aspeed-g6: Add support for the AST2600 USB pinmuxJohnny Huang
AST2600 has two USB ports, A, B: Port A supports 4 distinct modes: 1. PCIe EHCI to Hub 2. Hub to PHY 3. BMC EHCI to PHY 4. PCIe EHCI to PHY Port B support 3 modes: 1. USB1.1 HID controller 2. USB2.0 Device controller 3. BMC EHCI port2 Implement pinmux support by mapping each ports' functions onto a single pin group for each port. Signed-off-by: Johnny Huang <johnny_huang@aspeedtech.com> Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20191202061432.3996-4-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-13pinctrl: aspeed-g6: Add AST2600 I3C1 and I3C2 pinmux configJohnny Huang
These pins only expose a single function but are not fixed-function as their I3C capability can be disabled. Signed-off-by: Johnny Huang <johnny_huang@aspeedtech.com> [AJ: Tweak commit message, sort pins list] Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20191202061432.3996-3-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-12pinctrl: aspeed-g6: Fix LPC/eSPI mux configurationAndrew Jeffery
Early revisions of the AST2600 datasheet are conflicted about the state of the LPC/eSPI strapping bit (SCU510[6]). Conversations with ASPEED determined that the reference pinmux configuration tables were in error and the SCU documentation contained the correct configuration. Update the driver to reflect the state described in the SCU documentation. Fixes: 2eda1cdec49f ("pinctrl: aspeed: Add AST2600 pinmux support") Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20191202050110.15340-1-andrew@aj.id.au Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-12pinctrl: stm32: Use the correct style for SPDX License IdentifierNishad Kamdar
This patch corrects the SPDX License Identifier style in header file related to STMicroelectronics pinctrl driver. For C header files Documentation/process/license-rules.rst mandates C-like comments (opposed to C source files where C++ style should be used). Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Link: https://lore.kernel.org/r/14bb695da50f7af8499e7dfc32c2ab753d92a3e9.1574871463.git.nishadkamdar@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-12pinctrl: meson-axg: Use the correct style for SPDX License IdentifierNishad Kamdar
This patch corrects the SPDX License Identifier style in header file related Meson axg SoC pinctrl driver. It assigns explicit block comment for the SPDX License Identifier. Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Link: https://lore.kernel.org/r/bcb86aa22d8d8499502bbd8c54a364be24886a86.1574871463.git.nishadkamdar@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-12pinctrl: mediatek: Use the correct style for SPDX License IdentifierNishad Kamdar
This patch corrects the SPDX License Identifier style in header file related mediatek mt2712 pinctrl driver. For C header files Documentation/process/license-rules.rst mandates C-like comments (opposed to C source files where C++ style should be used). Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Link: https://lore.kernel.org/r/2994fb2f3375790e832396cdbb0a279dc8c8839f.1574871463.git.nishadkamdar@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-12-11pinctrl: samsung: Clarify the option titles/namesKrzysztof Kozlowski
The config options toggle Samsung Exynos SoCs pinctrl drivers, not the driver data. Clarify this in the option title/name and also make it consistent with other Samsung entries. No functional change. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
2019-12-11pinctrl: samsung: Enable compile test for build coverageKrzysztof Kozlowski
The Samsung pinctrl drivers require only GPIOLIB and OF for building. The drivers should be buildable on all architectures so enable COMPILE_TEST. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
2019-12-09pinctrl: baytrail: Group GPIO IRQ chip initializationAndy Shevchenko
After commit 5ea422750a9f ("pinctrl: baytrail: Pass irqchip when adding gpiochip") the GPIO IRQ chip structure is being initialized under conditional when IRQ resource has been discovered. But that commit left aside the assignment of ->init_valid_mask() callback that is done unconditionally. For sake of consistency and preventing some garbage in GPIO IRQ chip structure group initialization together. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-09pinctrl: baytrail: Allocate IRQ chip dynamicAndy Shevchenko
Keeping the IRQ chip definition static shares it with multiple instances of the GPIO chip in the system. This is bad and now we get this warning from GPIO library: "detected irqchip that is shared with multiple gpiochips: please fix the driver." Hence, move the IRQ chip definition from being driver static into the struct intel_pinctrl. So a unique IRQ chip is used for each GPIO chip instance. Fixes: 9f573b98ca50 ("pinctrl: baytrail: Update irq chip operations") Depends-on: ca8a958e2acb ("pinctrl: baytrail: Pass irqchip when adding gpiochip") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-09pinctrl: cherryview: Pass irqchip when adding gpiochipHans de Goede
We need to convert all old gpio irqchips to pass the irqchip setup along when adding the gpio_chip. For more info see drivers/gpio/TODO. For chained irqchips this is a pretty straight-forward conversion. Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-09pinctrl: cherryview: Add GPIO <-> pin mapping ranges via callbackHans de Goede
When IRQ chip is instantiated via GPIO library flow, the few functions, in particular the ACPI event registration mechanism, on some of ACPI based platforms expect that the pin ranges are initialized to that point. Add GPIO <-> pin mapping ranges via callback in the GPIO library flow. Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-09pinctrl: cherryview: Split out irq hw-init into a separate helper functionHans de Goede
Split out irq hw-init into a separate chv_gpio_irq_init_hw() function. This is a preparation patch for passing the irqchip when adding the gpiochip. Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-09pinctrl: baytrail: Pass irqchip when adding gpiochipAndy Shevchenko
We need to convert all old gpio irqchips to pass the irqchip setup along when adding the gpio_chip. For more info see drivers/gpio/TODO. For chained irqchips this is a pretty straight-forward conversion. Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Hans de Goede <hdegoede@redhat.com>
2019-12-09pinctrl: baytrail: Add GPIO <-> pin mapping ranges via callbackAndy Shevchenko
When IRQ chip is instantiated via GPIO library flow, the few functions, in particular the ACPI event registration mechanism, on some of ACPI based platforms expect that the pin ranges are initialized to that point. Add GPIO <-> pin mapping ranges via callback in the GPIO library flow. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Hans de Goede <hdegoede@redhat.com>
2019-12-09pinctrl: baytrail: Update North Community pin listAndy Shevchenko
Update North Community pin list to be more clear about pin functions. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2019-12-09pinctrl: baytrail: Really serialize all register accessesHans de Goede
Commit 39ce8150a079 ("pinctrl: baytrail: Serialize all register access") added a spinlock around all register accesses because: "There is a hardware issue in Intel Baytrail where concurrent GPIO register access might result reads of 0xffffffff and writes might get dropped completely." Testing has shown that this does not catch all cases, there are still 2 problems remaining 1) The original fix uses a spinlock per byt_gpio device / struct, additional testing has shown that this is not sufficient concurent accesses to 2 different GPIO banks also suffer from the same problem. This commit fixes this by moving to a single global lock. 2) The original fix did not add a lock around the register accesses in the suspend/resume handling. Since pinctrl-baytrail.c is using normal suspend/resume handlers, interrupts are still enabled during suspend/resume handling. Nothing should be using the GPIOs when they are being taken down, _but_ the GPIOs themselves may still cause interrupts, which are likely to use (read) the triggering GPIO. So we need to protect against concurrent GPIO register accesses in the suspend/resume handlers too. This commit fixes this by adding the missing spin_lock / unlock calls. The 2 fixes together fix the Acer Switch 10 SW5-012 getting completely confused after a suspend resume. The DSDT for this device has a bug in its _LID method which reprograms the home and power button trigger- flags requesting both high and low _level_ interrupts so the IRQs for these 2 GPIOs continuously fire. This combined with the saving of registers during suspend, triggers concurrent GPIO register accesses resulting in saving 0xffffffff as pconf0 value during suspend and then when restoring this on resume the pinmux settings get all messed up, resulting in various I2C busses being stuck, the wifi no longer working and often the tablet simply not coming out of suspend at all. Cc: stable@vger.kernel.org Fixes: 39ce8150a079 ("pinctrl: baytrail: Serialize all register access") Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-09pinctrl: sh-pfc: Make legacy function GPIO handling less fragileGeert Uytterhoeven
If there are no function GPIOs, sh_pfc_register_gpiochip() returns early with a success indicator. This is fragile, as new code may be added after the #ifdef block, which won't be executed in case of early return. Invert the logic, so the code always continues until the end of the function on success. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Link: https://lore.kernel.org/r/20191113101809.28600-1-geert+renesas@glider.be
2019-12-03Merge branch 'irq-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Ingo Molnar: "Most of the IRQ subsystem changes in this cycle were irq-chip driver updates: - Qualcomm PDC wakeup interrupt support - Layerscape external IRQ support - Broadcom bcm7038 PM and wakeup support - Ingenic driver cleanup and modernization - GICv3 ITS preparation for GICv4.1 updates - GICv4 fixes There's also the series from Frederic Weisbecker that fixes memory ordering bugs for the irq-work logic, whose primary fix is to turn work->irq_work.flags into an atomic variable and then convert the complex (and buggy) atomic_cmpxchg() loop in irq_work_claim() into a much simpler atomic_fetch_or() call. There are also various smaller cleanups" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits) pinctrl/sdm845: Add PDC wakeup interrupt map for GPIOs pinctrl/msm: Setup GPIO chip in hierarchy irqchip/qcom-pdc: Add irqchip set/get state calls irqchip/qcom-pdc: Add irqdomain for wakeup capable GPIOs irqchip/qcom-pdc: Do not toggle IRQ_ENABLE during mask/unmask irqchip/qcom-pdc: Update max PDC interrupts of/irq: Document properties for wakeup interrupt parent genirq: Introduce irq_chip_get/set_parent_state calls irqdomain: Add bus token DOMAIN_BUS_WAKEUP genirq: Fix function documentation of __irq_alloc_descs() irq_work: Fix IRQ_WORK_BUSY bit clearing irqchip/ti-sci-inta: Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...)) irq_work: Slightly simplify IRQ_WORK_PENDING clearing irq_work: Fix irq_work_claim() memory ordering irq_work: Convert flags to atomic_t irqchip: Ingenic: Add process for more than one irq at the same time. irqchip: ingenic: Alloc generic chips from IRQ domain irqchip: ingenic: Get virq number from IRQ domain irqchip: ingenic: Error out if IRQ domain creation failed irqchip: ingenic: Drop redundant irq_suspend / irq_resume functions ...
2019-11-28pinctrl: Fix warning by adding missing MODULE_LICENSERahul Tanwar
Fix below build warning WARNING: modpost: missing MODULE_LICENSE() in drivers/pinctrl/pinctrl-equilibrium.o Introduced by commit 1948d5c51dba ("pinctrl: Add pinmux & GPIO controller driver for a new SoC") by adding missing MODULE_LICENSE. Signed-off-by: Rahul Tanwar <rahul.tanwar@linux.intel.com> Link: https://lore.kernel.org/r/20191128080832.13529-2-rahul.tanwar@linux.intel.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-11-27Merge tag 'pinctrl-v5.5-1' of ↵Linus Torvalds
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 v5.5. It is pretty much business as usual, the most interesting thing I think is the pin controller for a new Intel chip called Lightning Mountain, which is according to news reports some kind of embedded network processor and what is surprising about it is that Intel have decided to use device tree to describe the system rather than ACPI that they have traditionally favored. Core changes: - Avoid taking direct references to device tree-supplied device names: these may changed at runtime under certain circumstances to kstrdup them. GPIO related: - Work is ongoing to move to passing the irqchip along as a templated struct gpio_irq_chip when adding a standard gpiolib-based irqchip to a GPIO controller, a few patches in this cycle switches a few pin control drivers over to using this method. New hardware support: - Intel Lightning Mountain SoC pin controller and GPIO support, a first Intel platform to use device tree rather than ACPI to configure the system. News reports says that this SoC is a network processor. - Qualcomm MSM8976 and MSM8956 - Qualcomm PMIC GPIO now also supports PM6150 and PM6150L - Qualcomm SPMI MPP and SPMI GPIO for PM8950 and PMI8950 - Rockchip RK3308 - Renesas R8A77961 - Allwinner Meson-A1 Driver improvements: - get_multiple and set_multiple support for the AT91-PIO4 driver. - Convert Qualcomm SSBI GPIO to use the hierarchical IRQ helpers in the GPIOlib irqchip" * tag 'pinctrl-v5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (93 commits) pinctrl: ingenic: Add OTG VBUS pin for the JZ4770 pinctrl: ingenic: Handle PIN_CONFIG_OUTPUT config pinctrl: Fix Kconfig indentation pinctrl: lewisburg: Update pin list according to v1.1v6 MAINTAINERS: Replace my email by one @kernel.org pinctrl: armada-37xx: Fix irq mask access in armada_37xx_irq_set_type() dt-bindings: pinctrl: intel: Add for new SoC pinctrl: Add pinmux & GPIO controller driver for a new SoC pinctrl: rza1: remove unnecessary static inline function pinctrl: meson: add pinctrl driver support for Meson-A1 SoC pinctrl: meson: add a new callback for SoCs fixup pinctrl: nomadik: db8500: Add mc0_a_2 pin group without direction control dt-bindings: pinctrl: Convert generic pin mux and config properties to schema pinctrl: cherryview: Missed type change to unsigned int pinctrl: intel: Missed type change to unsigned int pinctrl: use devm_platform_ioremap_resource() to simplify code pinctrl: just return if no valid maps dt-bindings: pinctrl: qcom-pmic-mpp: Add support for PM/PMI8950 pinctrl: qcom: spmi-mpp: Add PM/PMI8950 compatible strings dt-bindings: pinctrl: qcom-pmic-gpio: Add support for PM/PMI8950 ...
2019-11-21pinctrl: ingenic: Add OTG VBUS pin for the JZ4770Paul Cercueil
Add pin mux configuration for the OTG VBUS pin of the JZ4770. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/20191119155211.102527-2-paul@crapouillou.net Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-11-21pinctrl: ingenic: Handle PIN_CONFIG_OUTPUT configPaul Cercueil
This makes the driver support the 'output-low' and 'output-high' devicetree properties in gpio-hog sub-nodes. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/20191119155211.102527-1-paul@crapouillou.net Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-11-21pinctrl: Fix Kconfig indentationKrzysztof Kozlowski
Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/1574306382-32516-1-git-send-email-krzk@kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-11-21pinctrl: lewisburg: Update pin list according to v1.1v6Andy Shevchenko
Version 1.1v6 of pin list has some changes in pin names for Intel Lewisburg. Update the driver accordingly. Note, it reveals the bug in the driver that misses two pins in GPP_L and has rather two extra ones. That's why the ordering of some groups is changed. Fixes: e480b745386e ("pinctrl: intel: Add Intel Lewisburg GPIO support") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20191120133739.54332-1-andriy.shevchenko@linux.intel.com Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>