diff options
| -rw-r--r-- | drivers/gpio/gpiolib.c | 13 | ||||
| -rw-r--r-- | drivers/gpio/gpiolib.h | 3 | ||||
| -rw-r--r-- | include/linux/gpio/driver.h | 3 | ||||
| -rw-r--r-- | include/uapi/linux/gpio.h | 2 | ||||
| -rw-r--r-- | tools/gpio/lsgpio.c | 4 |
5 files changed, 22 insertions, 3 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 59f0045c5950..797c790aa750 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -342,6 +342,9 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) strncpy(chipinfo.name, dev_name(&gdev->dev), sizeof(chipinfo.name)); chipinfo.name[sizeof(chipinfo.name)-1] = '\0'; + strncpy(chipinfo.label, gdev->label, + sizeof(chipinfo.label)); + chipinfo.label[sizeof(chipinfo.label)-1] = '\0'; chipinfo.lines = gdev->ngpio; if (copy_to_user(ip, &chipinfo, sizeof(chipinfo))) return -EFAULT; @@ -479,6 +482,16 @@ int gpiochip_add_data(struct gpio_chip *chip, void *data) status = -EINVAL; goto err_free_gdev; } + + if (chip->label) + gdev->label = devm_kstrdup(&gdev->dev, chip->label, GFP_KERNEL); + else + gdev->label = devm_kstrdup(&gdev->dev, "unknown", GFP_KERNEL); + if (!gdev->label) { + status = -ENOMEM; + goto err_free_gdev; + } + gdev->ngpio = chip->ngpio; gdev->data = data; diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index ddbe409ad48f..e30e5fdb1214 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -37,6 +37,8 @@ struct acpi_device; * of the @descs array. * @base: GPIO base in the DEPRECATED global Linux GPIO numberspace, assigned * at device creation time. + * @label: a descriptive name for the GPIO device, such as the part number + * or name of the IP component in a System on Chip. * @data: per-instance data assigned by the driver * @list: links gpio_device:s together for traversal * @@ -55,6 +57,7 @@ struct gpio_device { struct gpio_desc *descs; int base; u16 ngpio; + char *label; void *data; struct list_head list; diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index ff96d0f9fceb..639607658ed8 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -21,7 +21,8 @@ struct gpio_device; /** * struct gpio_chip - abstract a GPIO controller - * @label: for diagnostics + * @label: a functional name for the GPIO device, such as a part + * number or the name of the SoC IP-block implementing it. * @gpiodev: the internal state holder, opaque struct * @parent: optional parent device providing the GPIOs * @owner: helps prevent removal of modules exporting active GPIOs diff --git a/include/uapi/linux/gpio.h b/include/uapi/linux/gpio.h index 3188a87bdaa0..3f93e1bcd3dd 100644 --- a/include/uapi/linux/gpio.h +++ b/include/uapi/linux/gpio.h @@ -16,10 +16,12 @@ /** * struct gpiochip_info - Information about a certain GPIO chip * @name: the name of this GPIO chip + * @label: a functional name for this GPIO chip * @lines: number of GPIO lines on this chip */ struct gpiochip_info { char name[32]; + char label[32]; __u32 lines; }; diff --git a/tools/gpio/lsgpio.c b/tools/gpio/lsgpio.c index 4cfe29da279b..692233f561fb 100644 --- a/tools/gpio/lsgpio.c +++ b/tools/gpio/lsgpio.c @@ -54,8 +54,8 @@ int list_device(const char *device_name) goto free_chrdev_name; } - fprintf(stdout, "GPIO chip: %s, %u GPIO lines\n", - cinfo.name, cinfo.lines); + fprintf(stdout, "GPIO chip: %s, \"%s\", %u GPIO lines\n", + cinfo.name, cinfo.label, cinfo.lines); if (close(fd) == -1) { ret = -errno; |