diff options
Diffstat (limited to 'drivers/gpio/gpio-sim.c')
| -rw-r--r-- | drivers/gpio/gpio-sim.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c index 1e8b92e9df80..c4106e37e6db 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); |