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Subject[PATCH 3/3] gpiolib: unexport devprop_gpiochip_set_names()
Date
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Now that devprop_gpiochip_set_names() is only used in a single place
inside drivers/gpio/gpiolib.c, there's no need anymore for it to be
exported or to even live in its own source file. Pull this function into
the core source file for gpiolib.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
drivers/gpio/Makefile | 1 -
drivers/gpio/gpiolib.c | 47 +++++++++++++++++++++++++++++++++++++
include/linux/gpio/driver.h | 2 --
3 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 4f9abff4f2dc..639275eb4e4d 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -6,7 +6,6 @@ ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
obj-$(CONFIG_GPIOLIB) += gpiolib.o
obj-$(CONFIG_GPIOLIB) += gpiolib-devres.o
obj-$(CONFIG_GPIOLIB) += gpiolib-legacy.o
-obj-$(CONFIG_GPIOLIB) += gpiolib-devprop.o
obj-$(CONFIG_GPIOLIB) += gpiolib-cdev.o
obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
obj-$(CONFIG_GPIO_SYSFS) += gpiolib-sysfs.o
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 0d390f0ec32c..2b2526c5de51 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -358,6 +358,53 @@ static int gpiochip_set_desc_names(struct gpio_chip *gc)
return 0;
}

+/*
+ * devprop_gpiochip_set_names - Set GPIO line names using device properties
+ * @chip: GPIO chip whose lines should be named, if possible
+ *
+ * Looks for device property "gpio-line-names" and if it exists assigns
+ * GPIO line names for the chip. The memory allocated for the assigned
+ * names belong to the underlying software node and should not be released
+ * by the caller.
+ */
+static int devprop_gpiochip_set_names(struct gpio_chip *chip)
+{
+ struct gpio_device *gdev = chip->gpiodev;
+ struct device *dev = chip->parent;
+ const char **names;
+ int ret, i;
+ int count;
+
+ count = device_property_count_strings(dev, "gpio-line-names");
+ if (count < 0)
+ return 0;
+
+ if (count > gdev->ngpio) {
+ dev_warn(&gdev->dev, "gpio-line-names is length %d but should be at most length %d",
+ count, gdev->ngpio);
+ count = gdev->ngpio;
+ }
+
+ names = kcalloc(count, sizeof(*names), GFP_KERNEL);
+ if (!names)
+ return -ENOMEM;
+
+ ret = device_property_read_string_array(dev, "gpio-line-names",
+ names, count);
+ if (ret < 0) {
+ dev_warn(&gdev->dev, "failed to read GPIO line names\n");
+ kfree(names);
+ return ret;
+ }
+
+ for (i = 0; i < count; i++)
+ gdev->descs[i].name = names[i];
+
+ kfree(names);
+
+ return 0;
+}
+
static unsigned long *gpiochip_allocate_mask(struct gpio_chip *gc)
{
unsigned long *p;
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 56485a040b82..4a7e295c3640 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -756,8 +756,6 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc,
enum gpiod_flags dflags);
void gpiochip_free_own_desc(struct gpio_desc *desc);

-int devprop_gpiochip_set_names(struct gpio_chip *gc);
-
#ifdef CONFIG_GPIOLIB

/* lock/unlock as IRQ */
--
2.26.1
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