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4e18429883
For some controllers PHYs can be optional. Handling NULL pointers without crashing nor failing, makes it easy to handle optional PHYs. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
168 lines
3.2 KiB
C
168 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
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* Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <generic-phy.h>
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static inline struct phy_ops *phy_dev_ops(struct udevice *dev)
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{
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return (struct phy_ops *)dev->driver->ops;
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}
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static int generic_phy_xlate_offs_flags(struct phy *phy,
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struct ofnode_phandle_args *args)
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{
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debug("%s(phy=%p)\n", __func__, phy);
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if (args->args_count > 1) {
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debug("Invaild args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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if (args->args_count)
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phy->id = args->args[0];
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else
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phy->id = 0;
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return 0;
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}
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int generic_phy_get_by_index(struct udevice *dev, int index,
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struct phy *phy)
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{
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struct ofnode_phandle_args args;
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struct phy_ops *ops;
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struct udevice *phydev;
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int i, ret;
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debug("%s(dev=%p, index=%d, phy=%p)\n", __func__, dev, index, phy);
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assert(phy);
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phy->dev = NULL;
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ret = dev_read_phandle_with_args(dev, "phys", "#phy-cells", 0, index,
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&args);
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if (ret) {
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debug("%s: dev_read_phandle_with_args failed: err=%d\n",
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__func__, ret);
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return ret;
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}
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ret = uclass_get_device_by_ofnode(UCLASS_PHY, args.node, &phydev);
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if (ret) {
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debug("%s: uclass_get_device_by_ofnode failed: err=%d\n",
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__func__, ret);
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/* Check if args.node's parent is a PHY provider */
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ret = uclass_get_device_by_ofnode(UCLASS_PHY,
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ofnode_get_parent(args.node),
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&phydev);
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if (ret)
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return ret;
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/* insert phy idx at first position into args array */
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for (i = args.args_count; i >= 1 ; i--)
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args.args[i] = args.args[i - 1];
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args.args_count++;
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args.args[0] = ofnode_read_u32_default(args.node, "reg", -1);
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}
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phy->dev = phydev;
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ops = phy_dev_ops(phydev);
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if (ops->of_xlate)
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ret = ops->of_xlate(phy, &args);
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else
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ret = generic_phy_xlate_offs_flags(phy, &args);
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if (ret) {
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debug("of_xlate() failed: %d\n", ret);
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goto err;
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}
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return 0;
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err:
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return ret;
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}
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int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
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struct phy *phy)
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{
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int index;
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debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy);
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index = dev_read_stringlist_search(dev, "phy-names", phy_name);
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if (index < 0) {
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debug("dev_read_stringlist_search() failed: %d\n", index);
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return index;
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}
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return generic_phy_get_by_index(dev, index, phy);
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}
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int generic_phy_init(struct phy *phy)
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{
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struct phy_ops const *ops;
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if (!phy)
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->init ? ops->init(phy) : 0;
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}
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int generic_phy_reset(struct phy *phy)
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{
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struct phy_ops const *ops;
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if (!phy)
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->reset ? ops->reset(phy) : 0;
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}
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int generic_phy_exit(struct phy *phy)
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{
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struct phy_ops const *ops;
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if (!phy)
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->exit ? ops->exit(phy) : 0;
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}
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int generic_phy_power_on(struct phy *phy)
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{
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struct phy_ops const *ops;
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if (!phy)
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->power_on ? ops->power_on(phy) : 0;
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}
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int generic_phy_power_off(struct phy *phy)
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{
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struct phy_ops const *ops;
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if (!phy)
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->power_off ? ops->power_off(phy) : 0;
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}
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UCLASS_DRIVER(phy) = {
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.id = UCLASS_PHY,
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.name = "phy",
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};
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