Merge branch 'ib-gpiod-flags' into devel

7 files changed, 64 insertions, 46 deletions

diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c
index 2c49a8b..d196be7 100644
--- a/drivers/gpio/devres.c
+++ b/drivers/gpio/devres.c
@@ -129,13 +129,19 @@ EXPORT_SYMBOL(devm_gpiod_get_index);
  * @dev:	GPIO consumer
  * @con_id:	function within the GPIO consumer
  * @child:	firmware node (child of @dev)
+ * @flags:	GPIO initialization flags
  *
  * GPIO descriptors returned from this function are automatically disposed on
  * driver detach.
+ *
+ * On successfull request the GPIO pin is configured in accordance with
+ * provided @flags.
  */
 struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
 					    const char *con_id,
-					    struct fwnode_handle *child)
+					    struct fwnode_handle *child,
+					    enum gpiod_flags flags,
+					    const char *label)
 {
 	char prop_name[32]; /* 32 is max size of property name */
 	struct gpio_desc **dr;
@@ -155,7 +161,7 @@ struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
 			snprintf(prop_name, sizeof(prop_name), "%s",
 					    gpio_suffixes[i]);
 
-		desc = fwnode_get_named_gpiod(child, prop_name);
+		desc = fwnode_get_named_gpiod(child, prop_name, flags, label);
 		if (!IS_ERR(desc) || (PTR_ERR(desc) != -ENOENT))
 			break;
 	}
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index c76fa4f..14ee088 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3301,6 +3301,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_index);
  * fwnode_get_named_gpiod - obtain a GPIO from firmware node
  * @fwnode:	handle of the firmware node
  * @propname:	name of the firmware property representing the GPIO
+ * @dflags:	GPIO initialization flags
  *
  * This function can be used for drivers that get their configuration
  * from firmware.
@@ -3309,12 +3310,18 @@ EXPORT_SYMBOL_GPL(gpiod_get_index);
  * underlying firmware interface and then makes sure that the GPIO
  * descriptor is requested before it is returned to the caller.
  *
+ * On successfull request the GPIO pin is configured in accordance with
+ * provided @dflags.
+ *
  * In case of error an ERR_PTR() is returned.
  */
 struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
-					 const char *propname)
+					 const char *propname,
+					 enum gpiod_flags dflags,
+					 const char *label)
 {
 	struct gpio_desc *desc = ERR_PTR(-ENODEV);
+	unsigned long lflags = 0;
 	bool active_low = false;
 	bool single_ended = false;
 	int ret;
@@ -3342,18 +3349,24 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 	if (IS_ERR(desc))
 		return desc;
 
-	ret = gpiod_request(desc, NULL);
+	ret = gpiod_request(desc, label);
 	if (ret)
 		return ERR_PTR(ret);
 
 	if (active_low)
-		set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+		lflags |= GPIO_ACTIVE_LOW;
 
 	if (single_ended) {
 		if (active_low)
-			set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+			lflags |= GPIO_OPEN_DRAIN;
 		else
-			set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+			lflags |= GPIO_OPEN_SOURCE;
+	}
+
+	ret = gpiod_configure_flags(desc, propname, lflags, dflags);
+	if (ret < 0) {
+		gpiod_put(desc);
+		return ERR_PTR(ret);
 	}
 
 	return desc;
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 582462d..2ec74d9 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -481,7 +481,8 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
 	spin_lock_init(&bdata->lock);
 
 	if (child) {
-		bdata->gpiod = devm_get_gpiod_from_child(dev, NULL, child);
+		bdata->gpiod = devm_get_gpiod_from_child(dev, NULL, child,
+							 GPIOD_IN, desc);
 		if (IS_ERR(bdata->gpiod)) {
 			error = PTR_ERR(bdata->gpiod);
 			if (error == -ENOENT) {
@@ -496,13 +497,6 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
 						error);
 				return error;
 			}
-		} else {
-			error = gpiod_direction_input(bdata->gpiod);
-			if (error) {
-				dev_err(dev, "Failed to configure GPIO %d as input: %d\n",
-					desc_to_gpio(bdata->gpiod), error);
-				return error;
-			}
 		}
 	} else if (gpio_is_valid(button->gpio)) {
 		/*
diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c
index bed4f20..5e35c56 100644
--- a/drivers/input/keyboard/gpio_keys_polled.c
+++ b/drivers/input/keyboard/gpio_keys_polled.c
@@ -304,7 +304,9 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
 			}
 
 			bdata->gpiod = devm_get_gpiod_from_child(dev, NULL,
-								 child);
+								 child,
+								 GPIOD_IN,
+								 button->desc);
 			if (IS_ERR(bdata->gpiod)) {
 				error = PTR_ERR(bdata->gpiod);
 				if (error != -EPROBE_DEFER)
@@ -314,14 +316,6 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
 				fwnode_handle_put(child);
 				return error;
 			}
-
-			error = gpiod_direction_input(bdata->gpiod);
-			if (error) {
-				dev_err(dev, "Failed to configure GPIO %d as input: %d\n",
-					desc_to_gpio(bdata->gpiod), error);
-				fwnode_handle_put(child);
-				return error;
-			}
 		} else if (gpio_is_valid(button->gpio)) {
 			/*
 			 * Legacy GPIO number so request the GPIO here and
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index d400dca..6c4825d 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -174,12 +174,6 @@ static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
 		const char *state = NULL;
 		struct device_node *np = to_of_node(child);
 
-		led.gpiod = devm_get_gpiod_from_child(dev, NULL, child);
-		if (IS_ERR(led.gpiod)) {
-			fwnode_handle_put(child);
-			return ERR_CAST(led.gpiod);
-		}
-
 		ret = fwnode_property_read_string(child, "label", &led.name);
 		if (ret && IS_ENABLED(CONFIG_OF) && np)
 			led.name = np->name;
@@ -188,6 +182,13 @@ static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
 			return ERR_PTR(-EINVAL);
 		}
 
+		led.gpiod = devm_get_gpiod_from_child(dev, NULL, child,
+						      GPIOD_ASIS, led.name);
+		if (IS_ERR(led.gpiod)) {
+			fwnode_handle_put(child);
+			return ERR_CAST(led.gpiod);
+		}
+
 		fwnode_property_read_string(child, "linux,default-trigger",
 					    &led.default_trigger);
 
diff --git a/drivers/video/fbdev/amba-clcd-nomadik.c b/drivers/video/fbdev/amba-clcd-nomadik.c
index 0c06fca..9175ad9 100644
--- a/drivers/video/fbdev/amba-clcd-nomadik.c
+++ b/drivers/video/fbdev/amba-clcd-nomadik.c
@@ -184,32 +184,31 @@ static void tpg110_init(struct device *dev, struct device_node *np,
 {
 	dev_info(dev, "TPG110 display init\n");
 
-	grestb = devm_get_gpiod_from_child(dev, "grestb", &np->fwnode);
+	/* This asserts the GRESTB signal, putting the display into reset */
+	grestb = devm_get_gpiod_from_child(dev, "grestb", &np->fwnode,
+					   GPIOD_OUT_HIGH, "grestb");
 	if (IS_ERR(grestb)) {
 		dev_err(dev, "no GRESTB GPIO\n");
 		return;
 	}
-	/* This asserts the GRESTB signal, putting the display into reset */
-	gpiod_direction_output(grestb, 1);
-
-	scen = devm_get_gpiod_from_child(dev, "scen", &np->fwnode);
+	scen = devm_get_gpiod_from_child(dev, "scen", &np->fwnode,
+					 GPIOD_OUT_LOW, "scen");
 	if (IS_ERR(scen)) {
 		dev_err(dev, "no SCEN GPIO\n");
 		return;
 	}
-	gpiod_direction_output(scen, 0);
-	scl = devm_get_gpiod_from_child(dev, "scl", &np->fwnode);
+	scl = devm_get_gpiod_from_child(dev, "scl", &np->fwnode, GPIOD_OUT_LOW,
+					"scl");
 	if (IS_ERR(scl)) {
 		dev_err(dev, "no SCL GPIO\n");
 		return;
 	}
-	gpiod_direction_output(scl, 0);
-	sda = devm_get_gpiod_from_child(dev, "sda", &np->fwnode);
+	sda = devm_get_gpiod_from_child(dev, "sda", &np->fwnode, GPIOD_OUT_LOW,
+					"sda");
 	if (IS_ERR(sda)) {
 		dev_err(dev, "no SDA GPIO\n");
 		return;
 	}
-	gpiod_direction_output(sda, 0);
 	board->enable = tpg110_enable;
 	board->disable = tpg110_disable;
 }
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index fb0fde6..80bad7e 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -135,10 +135,14 @@ int desc_to_gpio(const struct gpio_desc *desc);
 struct fwnode_handle;
 
 struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
-					 const char *propname);
+					 const char *propname,
+					 enum gpiod_flags dflags,
+					 const char *label);
 struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
 					    const char *con_id,
-					    struct fwnode_handle *child);
+					    struct fwnode_handle *child,
+					    enum gpiod_flags flags,
+					    const char *label);
 #else /* CONFIG_GPIOLIB */
 
 static inline int gpiod_count(struct device *dev, const char *con_id)
@@ -411,14 +415,21 @@ static inline int desc_to_gpio(const struct gpio_desc *desc)
 /* Child properties interface */
 struct fwnode_handle;
 
-static inline struct gpio_desc *fwnode_get_named_gpiod(
-	struct fwnode_handle *fwnode, const char *propname)
+static inline
+struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
+					 const char *propname,
+					 enum gpiod_flags dflags,
+					 const char *label)
 {
 	return ERR_PTR(-ENOSYS);
 }
 
-static inline struct gpio_desc *devm_get_gpiod_from_child(
-	struct device *dev, const char *con_id, struct fwnode_handle *child)
+static inline
+struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
+					    const char *con_id,
+					    struct fwnode_handle *child,
+					    enum gpiod_flags flags,
+					    const char *label)
 {
 	return ERR_PTR(-ENOSYS);
 }