Merge branch 'thread-irq-simpler' into devel

11 files changed, 117 insertions, 72 deletions

diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c
index 8ff7b0d3eac6..89863ea25de1 100644
--- a/drivers/gpio/gpio-adnp.c
+++ b/drivers/gpio/gpio-adnp.c
@@ -468,17 +468,19 @@ static int adnp_irq_setup(struct adnp *adnp)
 		return err;
 	}
 
-	err = gpiochip_irqchip_add(chip,
-				   &adnp_irq_chip,
-				   0,
-				   handle_simple_irq,
-				   IRQ_TYPE_NONE);
+	err = gpiochip_irqchip_add_nested(chip,
+					  &adnp_irq_chip,
+					  0,
+					  handle_simple_irq,
+					  IRQ_TYPE_NONE);
 	if (err) {
 		dev_err(chip->parent,
 			"could not connect irqchip to gpiochip\n");
 		return err;
 	}
 
+	gpiochip_set_nested_irqchip(chip, &adnp_irq_chip, adnp->client->irq);
+
 	return 0;
 }
 
diff --git a/drivers/gpio/gpio-crystalcove.c b/drivers/gpio/gpio-crystalcove.c
index 7c446d118cd6..2197368cc899 100644
--- a/drivers/gpio/gpio-crystalcove.c
+++ b/drivers/gpio/gpio-crystalcove.c
@@ -351,8 +351,8 @@ static int crystalcove_gpio_probe(struct platform_device *pdev)
 		return retval;
 	}
 
-	gpiochip_irqchip_add(&cg->chip, &crystalcove_irqchip, 0,
-			     handle_simple_irq, IRQ_TYPE_NONE);
+	gpiochip_irqchip_add_nested(&cg->chip, &crystalcove_irqchip, 0,
+				    handle_simple_irq, IRQ_TYPE_NONE);
 
 	retval = request_threaded_irq(irq, NULL, crystalcove_gpio_irq_handler,
 				      IRQF_ONESHOT, KBUILD_MODNAME, cg);
@@ -362,6 +362,8 @@ static int crystalcove_gpio_probe(struct platform_device *pdev)
 		return retval;
 	}
 
+	gpiochip_set_nested_irqchip(&cg->chip, &crystalcove_irqchip, irq);
+
 	return 0;
 }
 
diff --git a/drivers/gpio/gpio-dln2.c b/drivers/gpio/gpio-dln2.c
index f7a60a441e95..5d38b08d1ee2 100644
--- a/drivers/gpio/gpio-dln2.c
+++ b/drivers/gpio/gpio-dln2.c
@@ -467,7 +467,6 @@ static int dln2_gpio_probe(struct platform_device *pdev)
 	dln2->gpio.base = -1;
 	dln2->gpio.ngpio = pins;
 	dln2->gpio.can_sleep = true;
-	dln2->gpio.irq_not_threaded = true;
 	dln2->gpio.set = dln2_gpio_set;
 	dln2->gpio.get = dln2_gpio_get;
 	dln2->gpio.request = dln2_gpio_request;
diff --git a/drivers/gpio/gpio-max732x.c b/drivers/gpio/gpio-max732x.c
index a9aaf9d822b4..4ea4c6a1313b 100644
--- a/drivers/gpio/gpio-max732x.c
+++ b/drivers/gpio/gpio-max732x.c
@@ -520,20 +520,19 @@ static int max732x_irq_setup(struct max732x_chip *chip,
 				client->irq);
 			return ret;
 		}
-		ret =  gpiochip_irqchip_add(&chip->gpio_chip,
-					    &max732x_irq_chip,
-					    irq_base,
-					    handle_simple_irq,
-					    IRQ_TYPE_NONE);
+		ret =  gpiochip_irqchip_add_nested(&chip->gpio_chip,
+						   &max732x_irq_chip,
+						   irq_base,
+						   handle_simple_irq,
+						   IRQ_TYPE_NONE);
 		if (ret) {
 			dev_err(&client->dev,
 				"could not connect irqchip to gpiochip\n");
 			return ret;
 		}
-		gpiochip_set_chained_irqchip(&chip->gpio_chip,
-					     &max732x_irq_chip,
-					     client->irq,
-					     NULL);
+		gpiochip_set_nested_irqchip(&chip->gpio_chip,
+					    &max732x_irq_chip,
+					    client->irq);
 	}
 
 	return 0;
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index 99d37b56c258..504550665091 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -473,21 +473,20 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp)
 		return err;
 	}
 
-	err =  gpiochip_irqchip_add(chip,
-				    &mcp23s08_irq_chip,
-				    0,
-				    handle_simple_irq,
-				    IRQ_TYPE_NONE);
+	err =  gpiochip_irqchip_add_nested(chip,
+					   &mcp23s08_irq_chip,
+					   0,
+					   handle_simple_irq,
+					   IRQ_TYPE_NONE);
 	if (err) {
 		dev_err(chip->parent,
 			"could not connect irqchip to gpiochip: %d\n", err);
 		return err;
 	}
 
-	gpiochip_set_chained_irqchip(chip,
-				     &mcp23s08_irq_chip,
-				     mcp->irq,
-				     NULL);
+	gpiochip_set_nested_irqchip(chip,
+				    &mcp23s08_irq_chip,
+				    mcp->irq);
 
 	return 0;
 }
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 601c4550ee27..9733678f0219 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -636,20 +636,20 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
 			return ret;
 		}
 
-		ret =  gpiochip_irqchip_add(&chip->gpio_chip,
-					    &pca953x_irq_chip,
-					    irq_base,
-					    handle_simple_irq,
-					    IRQ_TYPE_NONE);
+		ret =  gpiochip_irqchip_add_nested(&chip->gpio_chip,
+						   &pca953x_irq_chip,
+						   irq_base,
+						   handle_simple_irq,
+						   IRQ_TYPE_NONE);
 		if (ret) {
 			dev_err(&client->dev,
 				"could not connect irqchip to gpiochip\n");
 			return ret;
 		}
 
-		gpiochip_set_chained_irqchip(&chip->gpio_chip,
-					     &pca953x_irq_chip,
-					     client->irq, NULL);
+		gpiochip_set_nested_irqchip(&chip->gpio_chip,
+					    &pca953x_irq_chip,
+					    client->irq);
 	}
 
 	return 0;
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index d168410e2338..895af42a4513 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -378,9 +378,10 @@ static int pcf857x_probe(struct i2c_client *client,
 
 	/* Enable irqchip if we have an interrupt */
 	if (client->irq) {
-		status = gpiochip_irqchip_add(&gpio->chip, &pcf857x_irq_chip,
-					      0, handle_level_irq,
-					      IRQ_TYPE_NONE);
+		status = gpiochip_irqchip_add_nested(&gpio->chip,
+						     &pcf857x_irq_chip,
+						     0, handle_level_irq,
+						     IRQ_TYPE_NONE);
 		if (status) {
 			dev_err(&client->dev, "cannot add irqchip\n");
 			goto fail;
@@ -393,8 +394,8 @@ static int pcf857x_probe(struct i2c_client *client,
 		if (status)
 			goto fail;
 
-		gpiochip_set_chained_irqchip(&gpio->chip, &pcf857x_irq_chip,
-					     client->irq, NULL);
+		gpiochip_set_nested_irqchip(&gpio->chip, &pcf857x_irq_chip,
+					    client->irq);
 		gpio->irq_parent = client->irq;
 	}
 
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index e2e1b16a42db..21364e95065d 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -484,21 +484,20 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
 				if (stmpe_gpio->norequest_mask & BIT(i))
 					clear_bit(i, stmpe_gpio->chip.irq_valid_mask);
 		}
-		ret =  gpiochip_irqchip_add(&stmpe_gpio->chip,
-					    &stmpe_gpio_irq_chip,
-					    0,
-					    handle_simple_irq,
-					    IRQ_TYPE_NONE);
+		ret =  gpiochip_irqchip_add_nested(&stmpe_gpio->chip,
+						   &stmpe_gpio_irq_chip,
+						   0,
+						   handle_simple_irq,
+						   IRQ_TYPE_NONE);
 		if (ret) {
 			dev_err(&pdev->dev,
 				"could not connect irqchip to gpiochip\n");
 			goto out_disable;
 		}
 
-		gpiochip_set_chained_irqchip(&stmpe_gpio->chip,
-					     &stmpe_gpio_irq_chip,
-					     irq,
-					     NULL);
+		gpiochip_set_nested_irqchip(&stmpe_gpio->chip,
+					    &stmpe_gpio_irq_chip,
+					    irq);
 	}
 
 	platform_set_drvdata(pdev, stmpe_gpio);
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index 5a5a6cb00eea..f041965f1b03 100644
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -337,21 +337,20 @@ static int tc3589x_gpio_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret =  gpiochip_irqchip_add(&tc3589x_gpio->chip,
-				    &tc3589x_gpio_irq_chip,
-				    0,
-				    handle_simple_irq,
-				    IRQ_TYPE_NONE);
+	ret =  gpiochip_irqchip_add_nested(&tc3589x_gpio->chip,
+					   &tc3589x_gpio_irq_chip,
+					   0,
+					   handle_simple_irq,
+					   IRQ_TYPE_NONE);
 	if (ret) {
 		dev_err(&pdev->dev,
 			"could not connect irqchip to gpiochip\n");
 		return ret;
 	}
 
-	gpiochip_set_chained_irqchip(&tc3589x_gpio->chip,
-				     &tc3589x_gpio_irq_chip,
-				     irq,
-				     NULL);
+	gpiochip_set_nested_irqchip(&tc3589x_gpio->chip,
+				    &tc3589x_gpio_irq_chip,
+				    irq);
 
 	platform_set_drvdata(pdev, tc3589x_gpio);
 
diff --git a/drivers/gpio/gpio-wcove.c b/drivers/gpio/gpio-wcove.c
index d0ddba7a9d08..34baee5b1dd6 100644
--- a/drivers/gpio/gpio-wcove.c
+++ b/drivers/gpio/gpio-wcove.c
@@ -426,8 +426,8 @@ static int wcove_gpio_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = gpiochip_irqchip_add(&wg->chip, &wcove_irqchip, 0,
-			     handle_simple_irq, IRQ_TYPE_NONE);
+	ret = gpiochip_irqchip_add_nested(&wg->chip, &wcove_irqchip, 0,
+					  handle_simple_irq, IRQ_TYPE_NONE);
 	if (ret) {
 		dev_err(dev, "Failed to add irqchip: %d\n", ret);
 		return ret;
@@ -446,6 +446,8 @@ static int wcove_gpio_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	gpiochip_set_nested_irqchip(&wg->chip, &wcove_irqchip, virq);
+
 	return 0;
 }
 
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 0e29cb745648..acdff62f2ee2 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1440,7 +1440,7 @@ static bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
 }
 
 /**
- * gpiochip_set_chained_irqchip() - sets a chained irqchip to a gpiochip
+ * gpiochip_set_cascaded_irqchip() - connects a cascaded irqchip to a gpiochip
  * @gpiochip: the gpiochip to set the irqchip chain to
  * @irqchip: the irqchip to chain to the gpiochip
  * @parent_irq: the irq number corresponding to the parent IRQ for this
@@ -1449,10 +1449,10 @@ static bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
  * coming out of the gpiochip. If the interrupt is nested rather than
  * cascaded, pass NULL in this handler argument
  */
-void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
-				  struct irq_chip *irqchip,
-				  int parent_irq,
-				  irq_flow_handler_t parent_handler)
+static void gpiochip_set_cascaded_irqchip(struct gpio_chip *gpiochip,
+					  struct irq_chip *irqchip,
+					  int parent_irq,
+					  irq_flow_handler_t parent_handler)
 {
 	unsigned int offset;
 
@@ -1476,7 +1476,7 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
 		irq_set_chained_handler_and_data(parent_irq, parent_handler,
 						 gpiochip);
 
-		gpiochip->irq_parent = parent_irq;
+		gpiochip->irq_chained_parent = parent_irq;
 	}
 
 	/* Set the parent IRQ for all affected IRQs */
@@ -1487,9 +1487,48 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
 			       parent_irq);
 	}
 }
+
+/**
+ * gpiochip_set_chained_irqchip() - connects a chained irqchip to a gpiochip
+ * @gpiochip: the gpiochip to set the irqchip chain to
+ * @irqchip: the irqchip to chain to the gpiochip
+ * @parent_irq: the irq number corresponding to the parent IRQ for this
+ * chained irqchip
+ * @parent_handler: the parent interrupt handler for the accumulated IRQ
+ * coming out of the gpiochip. If the interrupt is nested rather than
+ * cascaded, pass NULL in this handler argument
+ */
+void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
+				  struct irq_chip *irqchip,
+				  int parent_irq,
+				  irq_flow_handler_t parent_handler)
+{
+	gpiochip_set_cascaded_irqchip(gpiochip, irqchip, parent_irq,
+				      parent_handler);
+}
 EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip);
 
 /**
+ * gpiochip_set_nested_irqchip() - connects a nested irqchip to a gpiochip
+ * @gpiochip: the gpiochip to set the irqchip nested handler to
+ * @irqchip: the irqchip to nest to the gpiochip
+ * @parent_irq: the irq number corresponding to the parent IRQ for this
+ * nested irqchip
+ */
+void gpiochip_set_nested_irqchip(struct gpio_chip *gpiochip,
+				 struct irq_chip *irqchip,
+				 int parent_irq)
+{
+	if (!gpiochip->irq_nested) {
+		chip_err(gpiochip, "tried to nest a chained gpiochip\n");
+		return;
+	}
+	gpiochip_set_cascaded_irqchip(gpiochip, irqchip, parent_irq,
+				      NULL);
+}
+EXPORT_SYMBOL_GPL(gpiochip_set_nested_irqchip);
+
+/**
  * gpiochip_irq_map() - maps an IRQ into a GPIO irqchip
  * @d: the irqdomain used by this irqchip
  * @irq: the global irq number used by this GPIO irqchip irq
@@ -1511,8 +1550,8 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
 	 */
 	irq_set_lockdep_class(irq, chip->lock_key);
 	irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);
-	/* Chips that can sleep need nested thread handlers */
-	if (chip->can_sleep && !chip->irq_not_threaded)
+	/* Chips that use nested thread handlers have them marked */
+	if (chip->irq_nested)
 		irq_set_nested_thread(irq, 1);
 	irq_set_noprobe(irq);
 
@@ -1530,7 +1569,7 @@ static void gpiochip_irq_unmap(struct irq_domain *d, unsigned int irq)
 {
 	struct gpio_chip *chip = d->host_data;
 
-	if (chip->can_sleep)
+	if (chip->irq_nested)
 		irq_set_nested_thread(irq, 0);
 	irq_set_chip_and_handler(irq, NULL, NULL);
 	irq_set_chip_data(irq, NULL);
@@ -1585,9 +1624,9 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
 
 	acpi_gpiochip_free_interrupts(gpiochip);
 
-	if (gpiochip->irq_parent) {
-		irq_set_chained_handler(gpiochip->irq_parent, NULL);
-		irq_set_handler_data(gpiochip->irq_parent, NULL);
+	if (gpiochip->irq_chained_parent) {
+		irq_set_chained_handler(gpiochip->irq_chained_parent, NULL);
+		irq_set_handler_data(gpiochip->irq_chained_parent, NULL);
 	}
 
 	/* Remove all IRQ mappings and delete the domain */
@@ -1611,7 +1650,7 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
 }
 
 /**
- * gpiochip_irqchip_add() - adds an irqchip to a gpiochip
+ * _gpiochip_irqchip_add() - adds an irqchip to a gpiochip
  * @gpiochip: the gpiochip to add the irqchip to
  * @irqchip: the irqchip to add to the gpiochip
  * @first_irq: if not dynamically assigned, the base (first) IRQ to
@@ -1619,6 +1658,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
  * @handler: the irq handler to use (often a predefined irq core function)
  * @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE
  * to have the core avoid setting up any default type in the hardware.
+ * @nested: whether this is a nested irqchip calling handle_nested_irq()
+ * in its IRQ handler
  * @lock_key: lockdep class
  *
  * This function closely associates a certain irqchip with a certain
@@ -1640,6 +1681,7 @@ int _gpiochip_irqchip_add(struct gpio_chip *gpiochip,
 			  unsigned int first_irq,
 			  irq_flow_handler_t handler,
 			  unsigned int type,
+			  bool nested,
 			  struct lock_class_key *lock_key)
 {
 	struct device_node *of_node;
@@ -1654,6 +1696,7 @@ int _gpiochip_irqchip_add(struct gpio_chip *gpiochip,
 		pr_err("missing gpiochip .dev parent pointer\n");
 		return -EINVAL;
 	}
+	gpiochip->irq_nested = nested;
 	of_node = gpiochip->parent->of_node;
 #ifdef CONFIG_OF_GPIO
 	/*