Merge tag 'gpio-v5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Here is a host of GPIO fixes for the v5.5 series. The ACPI fix is
  especially important, see summary below and in the commit for details:

   - Select GPIOLIB_IRQCHIP on the max77620 GPIO expander

   - Fix context restore in the Zynq driver

   - Create a new ACPI quirk handler for disabling wakeups on
     problematic hardware.

   - Fix a coding style issue on the mockup device"

* tag 'gpio-v5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism
  gpiolib: acpi: Turn dmi_system_id table into a generic quirk table
  gpio: zynq: Fix for bug in zynq_gpio_restore_context API
  gpio: max77620: Add missing dependency on GPIOLIB_IRQCHIP
  gpio: mockup: fix coding style

drivers/gpio/Kconfig

@@ -1148,6 +1148,7 @@ config GPIO_MADERA
 config GPIO_MAX77620
 	tristate "GPIO support for PMIC MAX77620 and MAX20024"
 	depends on MFD_MAX77620
+	select GPIOLIB_IRQCHIP
 	help
 	  GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
 	  MAX77620 PMIC has 8 pins that can be configured as GPIOs. The

drivers/gpio/gpio-mockup.c

@@ -156,7 +156,7 @@ static int gpio_mockup_apply_pull(struct gpio_mockup_chip *chip,
 	mutex_lock(&chip->lock);
 
 	if (test_bit(FLAG_REQUESTED, &desc->flags) &&
-		!test_bit(FLAG_IS_OUT, &desc->flags)) {
+	    !test_bit(FLAG_IS_OUT, &desc->flags)) {
 		curr = __gpio_mockup_get(chip, offset);
 		if (curr == value)
 			goto out;
@@ -165,7 +165,7 @@ static int gpio_mockup_apply_pull(struct gpio_mockup_chip *chip,
 		irq_type = irq_get_trigger_type(irq);
 
 		if ((value == 1 && (irq_type & IRQ_TYPE_EDGE_RISING)) ||
-			(value == 0 && (irq_type & IRQ_TYPE_EDGE_FALLING)))
+		    (value == 0 && (irq_type & IRQ_TYPE_EDGE_FALLING)))
 			irq_sim_fire(sim, offset);
 	}
 

drivers/gpio/gpio-zynq.c

@@ -684,6 +684,8 @@ static void zynq_gpio_restore_context(struct zynq_gpio *gpio)
 	unsigned int bank_num;
 
 	for (bank_num = 0; bank_num < gpio->p_data->max_bank; bank_num++) {
+		writel_relaxed(ZYNQ_GPIO_IXR_DISABLE_ALL, gpio->base_addr +
+				ZYNQ_GPIO_INTDIS_OFFSET(bank_num));
 		writel_relaxed(gpio->context.datalsw[bank_num],
 			       gpio->base_addr +
 			       ZYNQ_GPIO_DATA_LSW_OFFSET(bank_num));
@@ -693,9 +695,6 @@ static void zynq_gpio_restore_context(struct zynq_gpio *gpio)
 		writel_relaxed(gpio->context.dirm[bank_num],
 			       gpio->base_addr +
 			       ZYNQ_GPIO_DIRM_OFFSET(bank_num));
-		writel_relaxed(gpio->context.int_en[bank_num],
-			       gpio->base_addr +
-			       ZYNQ_GPIO_INTEN_OFFSET(bank_num));
 		writel_relaxed(gpio->context.int_type[bank_num],
 			       gpio->base_addr +
 			       ZYNQ_GPIO_INTTYPE_OFFSET(bank_num));
@@ -705,6 +704,9 @@ static void zynq_gpio_restore_context(struct zynq_gpio *gpio)
 		writel_relaxed(gpio->context.int_any[bank_num],
 			       gpio->base_addr +
 			       ZYNQ_GPIO_INTANY_OFFSET(bank_num));
+		writel_relaxed(~(gpio->context.int_en[bank_num]),
+			       gpio->base_addr +
+			       ZYNQ_GPIO_INTEN_OFFSET(bank_num));
 	}
 }
 

drivers/gpio/gpiolib-acpi.c

@@ -21,11 +21,19 @@
 #include "gpiolib.h"
 #include "gpiolib-acpi.h"
 
+#define QUIRK_NO_EDGE_EVENTS_ON_BOOT		0x01l
+#define QUIRK_NO_WAKEUP				0x02l
+
 static int run_edge_events_on_boot = -1;
 module_param(run_edge_events_on_boot, int, 0444);
 MODULE_PARM_DESC(run_edge_events_on_boot,
 		 "Run edge _AEI event-handlers at boot: 0=no, 1=yes, -1=auto");
 
+static int honor_wakeup = -1;
+module_param(honor_wakeup, int, 0444);
+MODULE_PARM_DESC(honor_wakeup,
+		 "Honor the ACPI wake-capable flag: 0=no, 1=yes, -1=auto");
+
 /**
  * struct acpi_gpio_event - ACPI GPIO event handler data
  *
@@ -281,7 +289,7 @@ static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares,
 	event->handle = evt_handle;
 	event->handler = handler;
 	event->irq = irq;
-	event->irq_is_wake = agpio->wake_capable == ACPI_WAKE_CAPABLE;
+	event->irq_is_wake = honor_wakeup && agpio->wake_capable == ACPI_WAKE_CAPABLE;
 	event->pin = pin;
 	event->desc = desc;
 
@@ -1309,7 +1317,7 @@ static int acpi_gpio_handle_deferred_request_irqs(void)
 /* We must use _sync so that this runs after the first deferred_probe run */
 late_initcall_sync(acpi_gpio_handle_deferred_request_irqs);
 
-static const struct dmi_system_id run_edge_events_on_boot_blacklist[] = {
+static const struct dmi_system_id gpiolib_acpi_quirks[] = {
 	{
 		/*
 		 * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for
@@ -1319,7 +1327,8 @@ static const struct dmi_system_id run_edge_events_on_boot_blacklist[] = {
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "MINIX"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
-		}
+		},
+		.driver_data = (void *)QUIRK_NO_EDGE_EVENTS_ON_BOOT,
 	},
 	{
 		/*
@@ -1331,20 +1340,52 @@ static const struct dmi_system_id run_edge_events_on_boot_blacklist[] = {
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Wortmann_AG"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "TERRA_PAD_1061"),
-		}
+		},
+		.driver_data = (void *)QUIRK_NO_EDGE_EVENTS_ON_BOOT,
+	},
+	{
+		/*
+		 * Various HP X2 10 Cherry Trail models use an external
+		 * embedded-controller connected via I2C + an ACPI GPIO
+		 * event handler. The embedded controller generates various
+		 * spurious wakeup events when suspended. So disable wakeup
+		 * for its handler (it uses the only ACPI GPIO event handler).
+		 * This breaks wakeup when opening the lid, the user needs
+		 * to press the power-button to wakeup the system. The
+		 * alternative is suspend simply not working, which is worse.
+		 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "HP x2 Detachable 10-p0XX"),
+		},
+		.driver_data = (void *)QUIRK_NO_WAKEUP,
 	},
 	{} /* Terminating entry */
 };
 
 static int acpi_gpio_setup_params(void)
 {
+	const struct dmi_system_id *id;
+	long quirks = 0;
+
+	id = dmi_first_match(gpiolib_acpi_quirks);
+	if (id)
+		quirks = (long)id->driver_data;
+
 	if (run_edge_events_on_boot < 0) {
-		if (dmi_check_system(run_edge_events_on_boot_blacklist))
+		if (quirks & QUIRK_NO_EDGE_EVENTS_ON_BOOT)
 			run_edge_events_on_boot = 0;
 		else
 			run_edge_events_on_boot = 1;
 	}
 
+	if (honor_wakeup < 0) {
+		if (quirks & QUIRK_NO_WAKEUP)
+			honor_wakeup = 0;
+		else
+			honor_wakeup = 1;
+	}
+
 	return 0;
 }