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gpiolib: generalize devprop_gpiochip_set_names() for device properties

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devprop_gpiochip_set_names() is overly complicated with taking the
fwnode argument (which requires using dev_fwnode() & of_fwnode_handle()
in ACPI and OF GPIO code respectively). Let's just switch to using the
generic device properties.

This allows us to pull the code setting line names directly into
gpiochip_add_data_with_key() instead of handling it separately for
ACPI and OF.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Bartosz Golaszewski 2020-09-09 10:54:25 +02:00
parent 6b6ff4acb3
commit 7cba1a4d5e
5 changed files with 15 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpio/gpiolib-acpi.c
View File

@ -1221,9 +1221,6 @@ void acpi_gpiochip_add(struct gpio_chip *chip)
return;
}
if (!chip->names)
devprop_gpiochip_set_names(chip, dev_fwnode(chip->parent));
acpi_gpiochip_request_regions(acpi_gpio);
acpi_gpiochip_scan_gpios(acpi_gpio);
acpi_walk_dep_device_list(handle);

20
drivers/gpio/gpiolib-devprop.c
View File

@ -17,25 +17,23 @@
/**
* devprop_gpiochip_set_names - Set GPIO line names using device properties
* @chip: GPIO chip whose lines should be named, if possible
* @fwnode: Property Node containing the gpio-line-names property
*
* 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 firmware node and should not be released
* names belong to the underlying software node and should not be released
* by the caller.
*/
void devprop_gpiochip_set_names(struct gpio_chip *chip,
const struct fwnode_handle *fwnode)
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 = fwnode_property_read_string_array(fwnode, "gpio-line-names",
NULL, 0);
count = device_property_string_array_count(dev, "gpio-line-names");
if (count < 0)
return;
return 0;
if (count > gdev->ngpio) {
dev_warn(&gdev->dev, "gpio-line-names is length %d but should be at most length %d",
@ -45,19 +43,21 @@ void devprop_gpiochip_set_names(struct gpio_chip *chip,
names = kcalloc(count, sizeof(*names), GFP_KERNEL);
if (!names)
return;
return -ENOMEM;
ret = fwnode_property_read_string_array(fwnode, "gpio-line-names",
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;
return ret;
}
for (i = 0; i < count; i++)
gdev->descs[i].name = names[i];
kfree(names);
return 0;
}
EXPORT_SYMBOL_GPL(devprop_gpiochip_set_names);

5
drivers/gpio/gpiolib-of.c
View File

@ -1026,11 +1026,6 @@ int of_gpiochip_add(struct gpio_chip *chip)
if (ret)
return ret;
/* If the chip defines names itself, these take precedence */
if (!chip->names)
devprop_gpiochip_set_names(chip,
of_fwnode_handle(chip->of_node));
of_node_get(chip->of_node);
ret = of_gpiochip_scan_gpios(chip);

8
drivers/gpio/gpiolib.c
View File

@ -340,9 +340,6 @@ static int gpiochip_set_desc_names(struct gpio_chip *gc)
struct gpio_device *gdev = gc->gpiodev;
int i;
if (!gc->names)
return 0;
/* First check all names if they are unique */
for (i = 0; i != gc->ngpio; ++i) {
struct gpio_desc *gpio;
@ -621,7 +618,10 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
INIT_LIST_HEAD(&gdev->pin_ranges);
#endif
ret = gpiochip_set_desc_names(gc);
if (gc->names)
ret = gpiochip_set_desc_names(gc);
else
ret = devprop_gpiochip_set_names(gc);
if (ret)
goto err_remove_from_list;

3
include/linux/gpio/driver.h
View File

@ -756,8 +756,7 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc,
enum gpiod_flags dflags);
void gpiochip_free_own_desc(struct gpio_desc *desc);
void devprop_gpiochip_set_names(struct gpio_chip *gc,
const struct fwnode_handle *fwnode);
int devprop_gpiochip_set_names(struct gpio_chip *gc);
#ifdef CONFIG_GPIOLIB