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9eca7fd0d3
Add a new PHY_COMMON_PROPS library that provides helper functions for PHY drivers to read standardized polarity properties from the device tree node: - phy_get_rx_polarity() / phy_get_tx_polarity() - phy_get_manual_rx_polarity() / phy_get_manual_tx_polarity() The dt-bindings/phy/phy.h header with PHY_POL_NORMAL, PHY_POL_INVERT, and PHY_POL_AUTO constants is provided via dts/upstream/include, which is already in the build include path. Ported from Merge tag 'phy-for-7.0': git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy Link: https://git.kernel.org/linus/e7556b59ba65179612bce3fa56bb53d1b4fb20db Signed-off-by: Lucien.Jheng <lucienzx159@gmail.com>
70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* phy-common-props.h -- Common properties for generic PHYs
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*
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* Copyright 2025-2026 NXP
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*/
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#ifndef __PHY_COMMON_PROPS_H
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#define __PHY_COMMON_PROPS_H
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#include <dt-bindings/phy/phy.h>
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#include <dm/ofnode.h>
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/**
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* phy_get_rx_polarity - Get RX polarity for PHY differential lane
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* @node: Pointer to the PHY's device tree node.
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* @mode_name: The name of the PHY mode to look up.
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* @supported: Bit mask of PHY_POL_NORMAL, PHY_POL_INVERT and PHY_POL_AUTO
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* @default_val: Default polarity value if property is missing
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* @val: Pointer to returned polarity.
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*
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* Return: zero on success, negative error on failure.
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*/
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int phy_get_rx_polarity(ofnode node, const char *mode_name,
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unsigned int supported, unsigned int default_val,
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unsigned int *val);
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/**
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* phy_get_tx_polarity - Get TX polarity for PHY differential lane
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* @node: Pointer to the PHY's device tree node.
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* @mode_name: The name of the PHY mode to look up.
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* @supported: Bit mask of PHY_POL_NORMAL, PHY_POL_INVERT and PHY_POL_AUTO
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* @default_val: Default polarity value if property is missing
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* @val: Pointer to returned polarity.
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*
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* Return: zero on success, negative error on failure.
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*/
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int phy_get_tx_polarity(ofnode node, const char *mode_name,
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unsigned int supported, unsigned int default_val,
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unsigned int *val);
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/**
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* phy_get_manual_rx_polarity - Get manual RX polarity for PHY differential lane
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* @node: Pointer to the PHY's device tree node.
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* @mode_name: The name of the PHY mode to look up.
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* @val: Pointer to returned polarity.
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*
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* Helper for PHYs which do not support protocols with automatic RX polarity
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* detection and correction.
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*
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* Return: zero on success, negative error on failure.
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*/
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int phy_get_manual_rx_polarity(ofnode node, const char *mode_name,
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unsigned int *val);
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/**
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* phy_get_manual_tx_polarity - Get manual TX polarity for PHY differential lane
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* @node: Pointer to the PHY's device tree node.
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* @mode_name: The name of the PHY mode to look up.
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* @val: Pointer to returned polarity.
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*
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* Helper for PHYs without any custom default value for the TX polarity.
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*
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* Return: zero on success, negative error on failure.
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*/
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int phy_get_manual_tx_polarity(ofnode node, const char *mode_name,
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unsigned int *val);
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#endif /* __PHY_COMMON_PROPS_H */
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