target/linux/generic/backport-4.9/080-0001-leds-core-add-OF-variants-of-LED-registering-functio.patch

   1 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   2 Date: Mon, 6 Mar 2017 06:19:44 +0100
   3 Subject: [PATCH] leds: core: add OF variants of LED registering functions
   4 MIME-Version: 1.0
   5 Content-Type: text/plain; charset=UTF-8
   6 Content-Transfer-Encoding: 8bit
   7
   8 These new functions allow passing an additional device_node argument
   9 that will be internally set for created LED device. Thanks to this LED
  10 core code and triggers will be able to access DT node for reading extra
  11 info.
  12
  13 The easiest solution for achieving this was reworking old functions to
  14 more generic ones & adding simple defines for API compatibility.
  15
  16 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  17 Acked-by: Pavel Machek <pavel@ucw.cz>
  18 Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
  19 ---
  20  drivers/leds/led-class.c | 26 ++++++++++++++++----------
  21  include/linux/leds.h     | 14 ++++++++++----
  22  2 files changed, 26 insertions(+), 14 deletions(-)
  23
  24 --- a/drivers/leds/led-class.c
  25 +++ b/drivers/leds/led-class.c
  26 @@ -181,11 +181,14 @@ static int led_classdev_next_name(const
  27  }
  28
  29  /**
  30 - * led_classdev_register - register a new object of led_classdev class.
  31 - * @parent: The device to register.
  32 + * of_led_classdev_register - register a new object of led_classdev class.
  33 + *
  34 + * @parent: parent of LED device
  35   * @led_cdev: the led_classdev structure for this device.
  36 + * @np: DT node describing this LED
  37   */
  38 -int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
  39 +int of_led_classdev_register(struct device *parent, struct device_node *np,
  40 +                           struct led_classdev *led_cdev)
  41  {
  42         char name[64];
  43         int ret;
  44 @@ -198,6 +201,7 @@ int led_classdev_register(struct device
  45                                 led_cdev, led_cdev->groups, "%s", name);
  46         if (IS_ERR(led_cdev->dev))
  47                 return PTR_ERR(led_cdev->dev);
  48 +       led_cdev->dev->of_node = np;
  49
  50         if (ret)
  51                 dev_warn(parent, "Led %s renamed to %s due to name collision",
  52 @@ -228,7 +232,7 @@ int led_classdev_register(struct device
  53
  54         return 0;
  55  }
  56 -EXPORT_SYMBOL_GPL(led_classdev_register);
  57 +EXPORT_SYMBOL_GPL(of_led_classdev_register);
  58
  59  /**
  60   * led_classdev_unregister - unregisters a object of led_properties class.
  61 @@ -270,12 +274,14 @@ static void devm_led_classdev_release(st
  62  }
  63
  64  /**
  65 - * devm_led_classdev_register - resource managed led_classdev_register()
  66 - * @parent: The device to register.
  67 + * devm_of_led_classdev_register - resource managed led_classdev_register()
  68 + *
  69 + * @parent: parent of LED device
  70   * @led_cdev: the led_classdev structure for this device.
  71   */
  72 -int devm_led_classdev_register(struct device *parent,
  73 -                              struct led_classdev *led_cdev)
  74 +int devm_of_led_classdev_register(struct device *parent,
  75 +                                 struct device_node *np,
  76 +                                 struct led_classdev *led_cdev)
  77  {
  78         struct led_classdev **dr;
  79         int rc;
  80 @@ -284,7 +290,7 @@ int devm_led_classdev_register(struct de
  81         if (!dr)
  82                 return -ENOMEM;
  83
  84 -       rc = led_classdev_register(parent, led_cdev);
  85 +       rc = of_led_classdev_register(parent, np, led_cdev);
  86         if (rc) {
  87                 devres_free(dr);
  88                 return rc;
  89 @@ -295,7 +301,7 @@ int devm_led_classdev_register(struct de
  90
  91         return 0;
  92  }
  93 -EXPORT_SYMBOL_GPL(devm_led_classdev_register);
  94 +EXPORT_SYMBOL_GPL(devm_of_led_classdev_register);
  95
  96  static int devm_led_classdev_match(struct device *dev, void *res, void *data)
  97  {
  98 --- a/include/linux/leds.h
  99 +++ b/include/linux/leds.h
 100 @@ -109,10 +109,16 @@ struct led_classdev {
 101         struct mutex            led_access;
 102  };
 103
 104 -extern int led_classdev_register(struct device *parent,
 105 -                                struct led_classdev *led_cdev);
 106 -extern int devm_led_classdev_register(struct device *parent,
 107 -                                     struct led_classdev *led_cdev);
 108 +extern int of_led_classdev_register(struct device *parent,
 109 +                                   struct device_node *np,
 110 +                                   struct led_classdev *led_cdev);
 111 +#define led_classdev_register(parent, led_cdev)                                \
 112 +       of_led_classdev_register(parent, NULL, led_cdev)
 113 +extern int devm_of_led_classdev_register(struct device *parent,
 114 +                                        struct device_node *np,
 115 +                                        struct led_classdev *led_cdev);
 116 +#define devm_led_classdev_register(parent, led_cdev)                   \
 117 +       devm_of_led_classdev_register(parent, NULL, led_cdev)
 118  extern void led_classdev_unregister(struct led_classdev *led_cdev);
 119  extern void devm_led_classdev_unregister(struct device *parent,
 120                                          struct led_classdev *led_cdev);