diff options
| author |   Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> | 2016-02-24 22:17:19 +0800 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2016-02-25 16:08:45 +0100 |
| commit | d27c17285eb7ebb6aa513da7a3338e2a507b1216 (patch) | |
| tree | 85a94c1c9fb59dff61db96b24f19d2a7107c0775 /drivers/gpio | |
| parent | gpio: documenatation: fix GPIO_LOOKUP{,_IDX} documentation (diff) | |
| download | linux-dev-d27c17285eb7ebb6aa513da7a3338e2a507b1216.tar.xz linux-dev-d27c17285eb7ebb6aa513da7a3338e2a507b1216.zip | |
gpio: fix abi regression in sysfs
We started to assign the gpio_device as parent for the sysfs
but this changes the expected layout of sysfs. Restore the
previous behaviour.
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib-sysfs.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index c56309491e8b..932e510aec50 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -721,6 +721,7 @@ EXPORT_SYMBOL_GPL(gpiod_unexport); int gpiochip_sysfs_register(struct gpio_device *gdev) { struct device *dev; + struct device *parent; struct gpio_chip *chip = gdev->chip; /* @@ -732,8 +733,17 @@ int gpiochip_sysfs_register(struct gpio_device *gdev) if (!gpio_class.p) return 0; + /* + * For sysfs backward compatibility we need to preserve this + * preferred parenting to the gpio_chip parent field, if set. + */ + if (chip->parent) + parent = chip->parent; + else + parent = &gdev->dev; + /* use chip->base for the ID; it's already known to be unique */ - dev = device_create_with_groups(&gpio_class, &gdev->dev, + dev = device_create_with_groups(&gpio_class, parent, MKDEV(0, 0), chip, gpiochip_groups, "gpiochip%d", chip->base); |