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path: root/drivers/gpio/gpiolib-cdev.c
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Diffstat (limited to 'drivers/gpio/gpiolib-cdev.c')
-rw-r--r--drivers/gpio/gpiolib-cdev.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index 92f185575e94..0cb6b468f364 100644
--- a/drivers/gpio/gpiolib-cdev.c
+++ b/drivers/gpio/gpiolib-cdev.c
@@ -1497,6 +1497,21 @@ static int linereq_release(struct inode *inode, struct file *file)
return 0;
}
+#ifdef CONFIG_PROC_FS
+static void linereq_show_fdinfo(struct seq_file *out, struct file *file)
+{
+ struct linereq *lr = file->private_data;
+ struct device *dev = &lr->gdev->dev;
+ u16 i;
+
+ seq_printf(out, "gpio-chip:\t%s\n", dev_name(dev));
+
+ for (i = 0; i < lr->num_lines; i++)
+ seq_printf(out, "gpio-line:\t%d\n",
+ gpio_chip_hwgpio(lr->lines[i].desc));
+}
+#endif
+
static const struct file_operations line_fileops = {
.release = linereq_release,
.read = linereq_read,
@@ -1507,6 +1522,9 @@ static const struct file_operations line_fileops = {
#ifdef CONFIG_COMPAT
.compat_ioctl = linereq_ioctl_compat,
#endif
+#ifdef CONFIG_PROC_FS
+ .show_fdinfo = linereq_show_fdinfo,
+#endif
};
static int linereq_create(struct gpio_device *gdev, void __user *ip)