summaryrefslogtreecommitdiffstats
path: root/drivers/gpio/gpio-sim.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpio/gpio-sim.c')
-rw-r--r--drivers/gpio/gpio-sim.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index 1928209491..c4106e37e6 100644
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -20,6 +20,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irq_sim.h>
+#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/minmax.h>
#include <linux/mod_devicetable.h>
@@ -28,6 +29,7 @@
#include <linux/notifier.h>
#include <linux/platform_device.h>
#include <linux/property.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/string_helpers.h>
@@ -224,6 +226,25 @@ static void gpio_sim_free(struct gpio_chip *gc, unsigned int offset)
}
}
+static void gpio_sim_dbg_show(struct seq_file *seq, struct gpio_chip *gc)
+{
+ struct gpio_sim_chip *chip = gpiochip_get_data(gc);
+ const char *label;
+ int i;
+
+ guard(mutex)(&chip->lock);
+
+ for_each_requested_gpio(gc, i, label)
+ seq_printf(seq, " gpio-%-3d (%s) %s,%s\n",
+ gc->base + i,
+ label,
+ test_bit(i, chip->direction_map) ? "input" :
+ test_bit(i, chip->value_map) ? "output-high" :
+ "output-low",
+ test_bit(i, chip->pull_map) ? "pull-up" :
+ "pull-down");
+}
+
static ssize_t gpio_sim_sysfs_val_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -460,6 +481,7 @@ static int gpio_sim_add_bank(struct fwnode_handle *swnode, struct device *dev)
gc->to_irq = gpio_sim_to_irq;
gc->request = gpio_sim_request;
gc->free = gpio_sim_free;
+ gc->dbg_show = PTR_IF(IS_ENABLED(CONFIG_DEBUG_FS), gpio_sim_dbg_show);
gc->can_sleep = true;
ret = devm_gpiochip_add_data(dev, gc, chip);
@@ -1546,6 +1568,6 @@ static void __exit gpio_sim_exit(void)
}
module_exit(gpio_sim_exit);
-MODULE_AUTHOR("Bartosz Golaszewski <brgl@bgdev.pl");
+MODULE_AUTHOR("Bartosz Golaszewski <brgl@bgdev.pl>");
MODULE_DESCRIPTION("GPIO Simulator Module");
MODULE_LICENSE("GPL");