From 684818189b04b095b34964ed4a3ea5249a840eab Mon Sep 17 00:00:00 2001
From: Andrew Lunn <andrew@lunn.ch>
Date: Mon, 17 Apr 2023 17:17:28 +0200
Subject: [PATCH 6/9] net: phy: phy_device: Call into the PHY driver to set LED
brightness
Linux LEDs can be software controlled via the brightness file in /sys.
LED drivers need to implement a brightness_set function which the core
will call. Implement an intermediary in phy_device, which will call
into the phy driver if it implements the necessary function.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/phy/phy_device.c | 15 ++++++++++++---
include/linux/phy.h | 13 +++++++++++++
2 files changed, 25 insertions(+), 3 deletions(-)
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3038,11 +3038,18 @@ static bool phy_drv_supports_irq(struct
return phydrv->config_intr && phydrv->handle_interrupt;
}
-/* Dummy implementation until calls into PHY driver are added */
static int phy_led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness value)
{
- return 0;
+ struct phy_led *phyled = to_phy_led(led_cdev);
+ struct phy_device *phydev = phyled->phydev;
+ int err;
+
+ mutex_lock(&phydev->lock);
+ err = phydev->drv->led_brightness_set(phydev, phyled->index, value);
+ mutex_unlock(&phydev->lock);
+
+ return err;
}
static int of_phy_led(struct phy_device *phydev,
@@ -3059,12 +3066,14 @@ static int of_phy_led(struct phy_device
return -ENOMEM;
cdev = &phyled->led_cdev;
+ phyled->phydev = phydev;
err = of_property_read_u8(led, "reg", &phyled->index);
if (err)
return err;
- cdev->brightness_set_blocking = phy_led_set_brightness;
+ if (phydev->drv->led_brightness_set)
+ cdev->brightness_set_blocking = phy_led_set_brightness;
cdev->max_brightness = 1;
init_data.devicename = dev_name(&phydev->mdio.dev);
init_data.fwnode = of_fwnode_handle(led);
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -778,15 +778,19 @@ struct phy_tdr_config {
* struct phy_led: An LED driven by the PHY
*
* @list: List of LEDs
+ * @phydev: PHY this LED is attached to
* @led_cdev: Standard LED class structure
* @index: Number of the LED
*/
struct phy_led {
struct list_head list;
+ struct phy_device *phydev;
struct led_classdev led_cdev;
u8 index;
};
+#define to_phy_led(d) container_of(d, struct phy_led, led_cdev)
+
/**
* struct phy_driver - Driver structure for a particular PHY type
*
@@ -1001,6 +1005,15 @@ struct phy_driver {
int (*get_sqi)(struct phy_device *dev);
/** @get_sqi_max: Get the maximum signal quality indication */
int (*get_sqi_max)(struct phy_device *dev);
+
+ /**
+ * @led_brightness_set: Set a PHY LED brightness. Index
+ * indicates which of the PHYs led should be set. Value
+ * follows the standard LED class meaning, e.g. LED_OFF,
+ * LED_HALF, LED_FULL.
+ */
+ int (*led_brightness_set)(struct phy_device *dev,
+ u8 index, enum led_brightness value);
};
#define to_phy_driver(d) container_of(to_mdio_common_driver(d), \
struct phy_driver, mdiodrv)