Commit d22f93c6 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski
Browse files

gpio: sim: implement the dbg_show() callback 



Provide a custom implementation of the dbg_show() callback that prints
all requested lines together with their label, direction, value and
bias. This improves the code coverage of GPIOLIB.

Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent 11a94a33

drivers/gpio/gpio-sim.c

+22 −0
Original line number Diff line number Diff line
@@ -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);