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45bad8ba98
Backport newly introduced support for 'active-high' property and use
it to correctly implement polarity assignment for Aquantia PHY LEDs.
Previously the 'active-low' property was used to switch a LED PIN to
active-high ("drive VDD" in Aquantia-speak) mode.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
54 lines
1.9 KiB
Diff
54 lines
1.9 KiB
Diff
From a274465cc3bef2dfd9c9ea5100848dda0a8641e1 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Thu, 10 Oct 2024 13:54:19 +0100
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Subject: [PATCH 1/4] net: phy: support 'active-high' property for PHY LEDs
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In addition to 'active-low' and 'inactive-high-impedance' also
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support 'active-high' property for PHY LED pin configuration.
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As only either 'active-high' or 'active-low' can be set at the
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same time, WARN and return an error in case both are set.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Link: https://patch.msgid.link/91598487773d768f254d5faf06cf65b13e972f0e.1728558223.git.daniel@makrotopia.org
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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drivers/net/phy/phy_device.c | 6 ++++++
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include/linux/phy.h | 5 +++--
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2 files changed, 9 insertions(+), 2 deletions(-)
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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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@@ -3219,11 +3219,17 @@ 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-high"))
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+ set_bit(PHY_LED_ACTIVE_HIGH, &modes);
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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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+ if (WARN_ON(modes & BIT(PHY_LED_ACTIVE_LOW) &&
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+ modes & BIT(PHY_LED_ACTIVE_HIGH)))
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+ return -EINVAL;
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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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--- a/include/linux/phy.h
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+++ b/include/linux/phy.h
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@@ -872,8 +872,9 @@ struct phy_led {
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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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+ PHY_LED_ACTIVE_HIGH = 0,
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+ PHY_LED_ACTIVE_LOW = 1,
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+ PHY_LED_INACTIVE_HIGH_IMPEDANCE = 2,
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/* keep it last */
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__PHY_LED_MODES_NUM,
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