target/linux/generic/backport-6.1/801-v6.4-06-net-phy-phy_device-Call-into-the-PHY-driver-to-set-L.patch

   1 From 684818189b04b095b34964ed4a3ea5249a840eab Mon Sep 17 00:00:00 2001
   2 From: Andrew Lunn <andrew@lunn.ch>
   3 Date: Mon, 17 Apr 2023 17:17:28 +0200
   4 Subject: [PATCH 6/9] net: phy: phy_device: Call into the PHY driver to set LED
   5  brightness
   6
   7 Linux LEDs can be software controlled via the brightness file in /sys.
   8 LED drivers need to implement a brightness_set function which the core
   9 will call. Implement an intermediary in phy_device, which will call
  10 into the phy driver if it implements the necessary function.
  11
  12 Signed-off-by: Andrew Lunn <andrew@lunn.ch>
  13 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
  14 Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
  15 Signed-off-by: David S. Miller <davem@davemloft.net>
  16 ---
  17  drivers/net/phy/phy_device.c | 15 ++++++++++++---
  18  include/linux/phy.h          | 13 +++++++++++++
  19  2 files changed, 25 insertions(+), 3 deletions(-)
  20
  21 --- a/drivers/net/phy/phy_device.c
  22 +++ b/drivers/net/phy/phy_device.c
  23 @@ -2937,11 +2937,18 @@ static bool phy_drv_supports_irq(struct
  24         return phydrv->config_intr && phydrv->handle_interrupt;
  25  }
  26
  27 -/* Dummy implementation until calls into PHY driver are added */
  28  static int phy_led_set_brightness(struct led_classdev *led_cdev,
  29                                   enum led_brightness value)
  30  {
  31 -       return 0;
  32 +       struct phy_led *phyled = to_phy_led(led_cdev);
  33 +       struct phy_device *phydev = phyled->phydev;
  34 +       int err;
  35 +
  36 +       mutex_lock(&phydev->lock);
  37 +       err = phydev->drv->led_brightness_set(phydev, phyled->index, value);
  38 +       mutex_unlock(&phydev->lock);
  39 +
  40 +       return err;
  41  }
  42
  43  static int of_phy_led(struct phy_device *phydev,
  44 @@ -2958,12 +2965,14 @@ static int of_phy_led(struct phy_device
  45                 return -ENOMEM;
  46
  47         cdev = &phyled->led_cdev;
  48 +       phyled->phydev = phydev;
  49
  50         err = of_property_read_u8(led, "reg", &phyled->index);
  51         if (err)
  52                 return err;
  53
  54 -       cdev->brightness_set_blocking = phy_led_set_brightness;
  55 +       if (phydev->drv->led_brightness_set)
  56 +               cdev->brightness_set_blocking = phy_led_set_brightness;
  57         cdev->max_brightness = 1;
  58         init_data.devicename = dev_name(&phydev->mdio.dev);
  59         init_data.fwnode = of_fwnode_handle(led);
  60 --- a/include/linux/phy.h
  61 +++ b/include/linux/phy.h
  62 @@ -775,15 +775,19 @@ struct phy_tdr_config {
  63   * struct phy_led: An LED driven by the PHY
  64   *
  65   * @list: List of LEDs
  66 + * @phydev: PHY this LED is attached to
  67   * @led_cdev: Standard LED class structure
  68   * @index: Number of the LED
  69   */
  70  struct phy_led {
  71         struct list_head list;
  72 +       struct phy_device *phydev;
  73         struct led_classdev led_cdev;
  74         u8 index;
  75  };
  76
  77 +#define to_phy_led(d) container_of(d, struct phy_led, led_cdev)
  78 +
  79  /**
  80   * struct phy_driver - Driver structure for a particular PHY type
  81   *
  82 @@ -998,6 +1002,15 @@ struct phy_driver {
  83         int (*get_sqi)(struct phy_device *dev);
  84         /** @get_sqi_max: Get the maximum signal quality indication */
  85         int (*get_sqi_max)(struct phy_device *dev);
  86 +
  87 +       /**
  88 +        * @led_brightness_set: Set a PHY LED brightness. Index
  89 +        * indicates which of the PHYs led should be set. Value
  90 +        * follows the standard LED class meaning, e.g. LED_OFF,
  91 +        * LED_HALF, LED_FULL.
  92 +        */
  93 +       int (*led_brightness_set)(struct phy_device *dev,
  94 +                                 u8 index, enum led_brightness value);
  95  };
  96  #define to_phy_driver(d) container_of(to_mdio_common_driver(d),                \
  97                                       struct phy_driver, mdiodrv)