[PATCH v2 3/7] gpiolib: Introduce GPIO_LOOKUP_FLAGS_DEFAULT

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

Since GPIO library operates with enumerator when it's subject to handle
the GPIO lookup flags, it will be better to clearly see what default means.

Thus, introduce GPIO_LOOKUP_FLAGS_DEFAULT entry to describe
the default assumptions.

While here, replace 0 by newly introduced constant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/gpio/gpiolib-acpi.c  | 5 +++--
 drivers/gpio/gpiolib-of.c    | 2 +-
 drivers/gpio/gpiolib.c       | 9 +++++----
 include/linux/gpio/machine.h | 2 ++
 4 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index ba9cafa13ca2..cb3ed85bbe2d 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -816,6 +816,7 @@ int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
 			return PTR_ERR(desc);
 
 		if (info.gpioint && idx++ == index) {
+			unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
 			char label[32];
 			int irq;
 
@@ -827,7 +828,7 @@ int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
 				return irq;
 
 			snprintf(label, sizeof(label), "GpioInt() %d", index);
-			ret = gpiod_configure_flags(desc, label, 0, info.flags);
+			ret = gpiod_configure_flags(desc, label, lflags, info.flags);
 			if (ret < 0)
 				return ret;
 
@@ -1004,7 +1005,7 @@ acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip,
 	u32 gpios[2];
 	int ret;
 
-	*lflags = 0;
+	*lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
 	*dflags = 0;
 	*name = NULL;
 
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index da69a37bc9a7..5d5432d63ac9 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -387,7 +387,7 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
 		return ERR_PTR(-EINVAL);
 
 	xlate_flags = 0;
-	*lflags = 0;
+	*lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
 	*dflags = 0;
 
 	ret = of_property_read_u32(chip_np, "#gpio-cells", &tmp);
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 9accbeb8a89a..fe9d72ee5d0b 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2515,6 +2515,7 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
 					    const char *label,
 					    enum gpiod_flags flags)
 {
+	unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
 	struct gpio_desc *desc = gpiochip_get_desc(chip, hwnum);
 	int err;
 
@@ -2527,7 +2528,7 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
 	if (err < 0)
 		return ERR_PTR(err);
 
-	err = gpiod_configure_flags(desc, label, 0, flags);
+	err = gpiod_configure_flags(desc, label, lflags, flags);
 	if (err) {
 		chip_err(chip, "setup of own GPIO %s failed\n", label);
 		gpiod_free_commit(desc);
@@ -4150,7 +4151,7 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
 					       unsigned int idx,
 					       enum gpiod_flags flags)
 {
-	unsigned long lookupflags = 0;
+	unsigned long lookupflags = GPIO_LOOKUP_FLAGS_DEFAULT;
 	struct gpio_desc *desc = NULL;
 	int status;
 	/* Maybe we have a device name, maybe not */
@@ -4237,8 +4238,8 @@ struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
 					 enum gpiod_flags dflags,
 					 const char *label)
 {
+	unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
 	struct gpio_desc *desc;
-	unsigned long lflags = 0;
 	enum of_gpio_flags flags;
 	bool active_low = false;
 	bool single_ended = false;
@@ -4316,8 +4317,8 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 					 enum gpiod_flags dflags,
 					 const char *label)
 {
+	unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
 	struct gpio_desc *desc = ERR_PTR(-ENODEV);
-	unsigned long lflags = 0;
 	int ret;
 
 	if (!fwnode)
diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h
index dad392158550..35f299d1f6a7 100644
--- a/include/linux/gpio/machine.h
+++ b/include/linux/gpio/machine.h
@@ -14,6 +14,8 @@ enum gpio_lookup_flags {
 	GPIO_TRANSITORY			= (1 << 3),
 	GPIO_PULL_UP			= (1 << 4),
 	GPIO_PULL_DOWN			= (1 << 5),
+
+	GPIO_LOOKUP_FLAGS_DEFAULT	= GPIO_ACTIVE_HIGH | GPIO_PERSISTENT,
 };
 
 /**
-- 
2.20.1