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path: root/drivers/pinctrl/intel
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2020-01-16pinctrl: tigerlake: Tiger Lake uses _HID enumerationMika Westerberg
Turns out that Tiger Lake GPIO will be enumerated using _HID method where there is only a single ACPI device and multiple BARs so rework the driver to support that scheme instead. Fixes: c9ccf71fc807 ("pinctrl: intel: Add Intel Tiger Lake pin controller support") Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-16pinctrl: sunrisepoint: Add Coffee Lake-S ACPI IDMika Westerberg
Intel Coffee Lake-S PCH has the same GPIO hardware than Sunrisepoint-H PCH but the ACPI ID is different. Add this new ACPI ID to the list of supported devices. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-09pinctrl: intel: Pass irqchip when adding gpiochipLinus Walleij
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: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-09pinctrl: intel: Add GPIO <-> pin mapping ranges via callbackLinus Walleij
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. Cc: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-09pinctrl: baytrail: Replace WARN with dev_info_once when setting direct-irq ↵Hans de Goede
pin to output Suspending Goodix touchscreens requires changing the interrupt pin to output before sending them a power-down command. Followed by wiggling the interrupt pin to wake the device up, after which it is put back in input mode. On Cherry Trail device the interrupt pin is listed as a GpioInt ACPI resource so we can do this without problems as long as we release the IRQ before changing the pin to output mode. On Bay Trail devices with a Goodix touchscreen direct-irq mode is used in combination with listing the pin as a normal GpioIo resource. This works fine, but this triggers the WARN in byt_gpio_set_direction-s output path because direct-irq support is enabled on the pin. This commit replaces the WARN call with a dev_info_once call, fixing a bunch of WARN splats in dmesg on each suspend/resume cycle. 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>
2020-01-09pinctrl: baytrail: Do not clear IRQ flags on direct-irq enabled pinsHans de Goede
Suspending Goodix touchscreens requires changing the interrupt pin to output before sending them a power-down command. Followed by wiggling the interrupt pin to wake the device up, after which it is put back in input mode. On Bay Trail devices with a Goodix touchscreen direct-irq mode is used in combination with listing the pin as a normal GpioIo resource. This works fine, until the goodix driver gets rmmod-ed and then insmod-ed again. In this case byt_gpio_disable_free() calls byt_gpio_clear_triggering() which clears the IRQ flags and after that the (direct) IRQ no longer triggers. This commit fixes this by adding a check for the BYT_DIRECT_IRQ_EN flag to byt_gpio_clear_triggering(). Note that byt_gpio_clear_triggering() only gets called from byt_gpio_disable_free() for direct-irq enabled pins, as these are excluded from the irq_valid mask by byt_init_irq_valid_mask(). Signed-off-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>
2020-01-08pinctrl: sunrisepoint: Add missing Interrupt Status register offsetBoyan Ding
Commit 179e5a6114cc ("pinctrl: intel: Remove default Interrupt Status offset") removes default interrupt status offset of GPIO controllers, with previous commits explicitly providing the previously default offsets. However, the is_offset value in SPTH_COMMUNITY is missing, preventing related irq from being properly detected and handled. Fixes: f702e0b93cdb ("pinctrl: sunrisepoint: Provide Interrupt Status register offset") Link: https://bugzilla.kernel.org/show_bug.cgi?id=205745 Cc: stable@vger.kernel.org Signed-off-by: Boyan Ding <boyan.j.ding@gmail.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-12-13pinctrl: lynxpoint: Update summary in the driverAndy Shevchenko
Reflect in the driver that it is now a pin control one. While here, update copyright years and authors. 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: Switch to pin control APIAndy Shevchenko
When all preparations are done, we may switch to pin control API. 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: 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. 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: Implement ->pin_dbg_show()Andy Shevchenko
The introduced callback ->pin_dbg_show() is useful for debugging. 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: Add pin control operationsAndy Shevchenko
Add implementation for: - pin control, group information retrieval: count, name and pins - pin muxing: - function information (count, name and groups) - mux setting - GPIO control (enable, disable, set direction) - pin configuration: - pull disable, up and down - any other option is treated as not supported. 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: Reuse struct intel_pinctrl in the driverAndy Shevchenko
We may use now available struct intel_pinctrl in the driver. No functional change implied. 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: Add pin control data structuresAndy Shevchenko
In order to implement pin control for Intel Lynxpoint, we need data structures in which to store and pass along pin, community and SoC data information. 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: Implement intel_gpio_get_direction callbackAndy Shevchenko
Allows querying GPIO direction from the pad config register. If the pad is not in GPIO mode, return an error. 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: Implement ->irq_ack() callbackAndy Shevchenko
Instead of playing tricks with registers in the interrupt handler, utilize the IRQ chip core for ACKing interrupts properly. 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 ownership check to IRQ chipAndy Shevchenko
There is nothing wrong with requesting pin that owned by ACPI. The only difference is how interrupt status will be reflected. It means that in ACPI mode we may not use pin as GPIO-backed IRQ. Taking above into consideration, move the check from GPIO to IRQ chip callback. 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 lp_irq_type() closer to IRQ related routinesAndy Shevchenko
Consolidate IRQ routines for better maintenance. While here, rename lp_irq_type() to lp_irq_set_type() to be in align with a callback name. 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 ->remove closer to ->probe()Andy Shevchenko
Consolidate ->remove and ->probe() callbacks for better maintenance. 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: Extract lp_gpio_acpi_use() for future useAndy Shevchenko
We may need this function for other features in the 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: lynxpoint: Convert unsigned to unsigned intAndy Shevchenko
Simple type conversion with no functional change implied. 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: Switch to memory mapped IO accessorsAndy Shevchenko
Convert driver to use memory mapped IO accessors. 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: 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. 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: 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>
2019-12-09pinctrl: 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>
2019-11-21pinctrl: 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>
2019-11-07pinctrl: cherryview: Missed type change to unsigned intAndy Shevchenko
We converted 'unsigned' type to be 'unsigned int' in the driver, but there are couple of leftovers. So, finish the task now. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 09:35:47 +0000