@@ -3152,6 +3152,7 @@ static int of_phy_led(struct phy_device *phydev,
struct device *dev = &phydev->mdio.dev;
struct led_init_data init_data = {};
struct led_classdev *cdev;
+ unsigned long modes = 0;
struct phy_led *phyled;
u32 index;
int err;
@@ -3169,6 +3170,21 @@ static int of_phy_led(struct phy_device *phydev,
if (index > U8_MAX)
return -EINVAL;
+ if (of_property_read_bool(led, "active-low"))
+ set_bit(PHY_LED_ACTIVE_LOW, &modes);
+ if (of_property_read_bool(led, "inactive-high-impedance"))
+ set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes);
+
+ if (modes) {
+ /* Return error if asked to set polarity modes but not supported */
+ if (!phydev->drv->led_polarity_set)
+ return -EINVAL;
+
+ err = phydev->drv->led_polarity_set(phydev, index, modes);
+ if (err)
+ return err;
+ }
+
phyled->index = index;
if (phydev->drv->led_brightness_set)
cdev->brightness_set_blocking = phy_led_set_brightness;
@@ -860,6 +860,15 @@ struct phy_plca_status {
bool pst;
};
+/* Modes for PHY LED configuration */
+enum phy_led_modes {
+ PHY_LED_ACTIVE_LOW = 0,
+ PHY_LED_INACTIVE_HIGH_IMPEDANCE = 1,
+
+ /* keep it last */
+ __PHY_LED_MODES_NUM,
+};
+
/**
* struct phy_led: An LED driven by the PHY
*
@@ -1153,6 +1162,19 @@ struct phy_driver {
int (*led_hw_control_get)(struct phy_device *dev, u8 index,
unsigned long *rules);
+ /**
+ * @led_polarity_set: Set the LED polarity modes
+ * @dev: PHY device which has the LED
+ * @index: Which LED of the PHY device
+ * @modes: bitmap of LED polarity modes
+ *
+ * Configure LED with all the required polarity modes in @modes
+ * to make it correctly turn ON or OFF.
+ *
+ * Returns 0, or an error code.
+ */
+ int (*led_polarity_set)(struct phy_device *dev, int index,
+ unsigned long modes);
};
#define to_phy_driver(d) container_of(to_mdio_common_driver(d), \
struct phy_driver, mdiodrv)
Add support for PHY LEDs polarity modes. Some PHY require LED to be set to active low to be turned ON. Adds support for this by declaring active-low property in DT. PHY driver needs to declare .led_polarity_set() to configure LED polarity modes. Function will pass the index with the LED index and a bitmap with all the required modes to set. Current supported modes are: - active-low with the flag PHY_LED_ACTIVE_LOW. LED is set to active-low to turn it ON. - inactive-high-impedance with the flag PHY_LED_INACTIVE_HIGH_IMPEDANCE. LED is set to high impedance to turn it OFF. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> --- Changes v9: - Make LED probe fail if modes asked but not supported - Fix wrong function description Changes v5: - Rework to LED modes bitmap Changes v4: - Drop for global active-low - Rework to polarity option (for marvell10g series support) Changes v3: - Out of RFC Changes v2: - Add this patch drivers/net/phy/phy_device.c | 16 ++++++++++++++++ include/linux/phy.h | 22 ++++++++++++++++++++++ 2 files changed, 38 insertions(+)