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99 lines
3.2 KiB
Diff
99 lines
3.2 KiB
Diff
From 7ae215ee7bb855f13c80565470fc7f67db4ba82f Mon Sep 17 00:00:00 2001
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From: Christian Marangi <ansuelsmth@gmail.com>
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Date: Thu, 25 Jan 2024 21:36:59 +0100
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Subject: [PATCH 3/5] net: phy: add support for PHY LEDs polarity modes
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Add support for PHY LEDs polarity modes. Some PHY require LED to be set
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to active low to be turned ON. Adds support for this by declaring
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active-low property in DT.
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PHY driver needs to declare .led_polarity_set() to configure LED
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polarity modes. Function will pass the index with the LED index and a
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bitmap with all the required modes to set.
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Current supported modes are:
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- active-low with the flag PHY_LED_ACTIVE_LOW. LED is set to active-low
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to turn it ON.
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- inactive-high-impedance with the flag PHY_LED_INACTIVE_HIGH_IMPEDANCE.
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LED is set to high impedance to turn it OFF.
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Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Link: https://lore.kernel.org/r/20240125203702.4552-4-ansuelsmth@gmail.com
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/phy/phy_device.c | 16 ++++++++++++++++
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include/linux/phy.h | 22 ++++++++++++++++++++++
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2 files changed, 38 insertions(+)
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--- a/drivers/net/phy/phy_device.c
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+++ b/drivers/net/phy/phy_device.c
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@@ -3138,6 +3138,7 @@ static int of_phy_led(struct phy_device
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struct device *dev = &phydev->mdio.dev;
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struct led_init_data init_data = {};
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struct led_classdev *cdev;
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+ unsigned long modes = 0;
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struct phy_led *phyled;
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u32 index;
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int err;
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@@ -3155,6 +3156,21 @@ static int of_phy_led(struct phy_device
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if (index > U8_MAX)
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return -EINVAL;
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+ if (of_property_read_bool(led, "active-low"))
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+ set_bit(PHY_LED_ACTIVE_LOW, &modes);
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+ if (of_property_read_bool(led, "inactive-high-impedance"))
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+ set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes);
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+
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+ if (modes) {
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+ /* Return error if asked to set polarity modes but not supported */
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+ if (!phydev->drv->led_polarity_set)
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+ return -EINVAL;
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+
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+ err = phydev->drv->led_polarity_set(phydev, index, modes);
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+ if (err)
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+ return err;
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+ }
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+
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phyled->index = index;
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if (phydev->drv->led_brightness_set)
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cdev->brightness_set_blocking = phy_led_set_brightness;
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--- a/include/linux/phy.h
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+++ b/include/linux/phy.h
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@@ -791,6 +791,15 @@ struct phy_led {
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#define to_phy_led(d) container_of(d, struct phy_led, led_cdev)
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+/* Modes for PHY LED configuration */
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+enum phy_led_modes {
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+ PHY_LED_ACTIVE_LOW = 0,
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+ PHY_LED_INACTIVE_HIGH_IMPEDANCE = 1,
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+
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+ /* keep it last */
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+ __PHY_LED_MODES_NUM,
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+};
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+
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/**
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* struct phy_driver - Driver structure for a particular PHY type
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*
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@@ -1059,6 +1068,19 @@ struct phy_driver {
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int (*led_hw_control_get)(struct phy_device *dev, u8 index,
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unsigned long *rules);
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+ /**
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+ * @led_polarity_set: Set the LED polarity modes
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+ * @dev: PHY device which has the LED
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+ * @index: Which LED of the PHY device
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+ * @modes: bitmap of LED polarity modes
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+ *
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+ * Configure LED with all the required polarity modes in @modes
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+ * to make it correctly turn ON or OFF.
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+ *
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+ * Returns 0, or an error code.
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+ */
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+ int (*led_polarity_set)(struct phy_device *dev, int index,
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+ unsigned long modes);
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};
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#define to_phy_driver(d) container_of(to_mdio_common_driver(d), \
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struct phy_driver, mdiodrv)
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