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3970c82a60
Some usb-nop-xceiv devices use a gpio take them out of reset. Add a reset function to put them into that state. This is similar to how Linux handles the usb-nop-xceiv driver. Signed-off-by: Adam Ford <aford173@gmail.com>
100 lines
2 KiB
C
100 lines
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 <clk.h>
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#include <common.h>
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#include <dm.h>
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#include <dm/device.h>
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#include <dm/device_compat.h>
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#include <generic-phy.h>
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#include <asm-generic/gpio.h>
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struct nop_phy_priv {
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struct clk_bulk bulk;
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#if CONFIG_IS_ENABLED(DM_GPIO)
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struct gpio_desc reset_gpio;
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#endif
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};
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#if CONFIG_IS_ENABLED(DM_GPIO)
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static int nop_phy_reset(struct phy *phy)
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{
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struct nop_phy_priv *priv = dev_get_priv(phy->dev);
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/* Return if there is no gpio since it's optional */
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if (!dm_gpio_is_valid(&priv->reset_gpio))
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return 0;
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return dm_gpio_set_value(&priv->reset_gpio, false);
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}
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#endif
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static int nop_phy_init(struct phy *phy)
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{
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struct nop_phy_priv *priv = dev_get_priv(phy->dev);
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int ret = 0;
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if (CONFIG_IS_ENABLED(CLK)) {
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ret = clk_enable_bulk(&priv->bulk);
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if (ret)
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return ret;
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}
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#if CONFIG_IS_ENABLED(DM_GPIO)
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ret = nop_phy_reset(phy);
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if (ret) {
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if (CONFIG_IS_ENABLED(CLK))
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clk_disable_bulk(&priv->bulk);
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return ret;
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}
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#endif
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return 0;
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}
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static int nop_phy_probe(struct udevice *dev)
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{
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struct nop_phy_priv *priv = dev_get_priv(dev);
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int ret = 0;
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if (CONFIG_IS_ENABLED(CLK)) {
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ret = clk_get_bulk(dev, &priv->bulk);
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if (ret < 0) {
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dev_err(dev, "Failed to get clk: %d\n", ret);
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return ret;
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}
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}
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#if CONFIG_IS_ENABLED(DM_GPIO)
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ret = gpio_request_by_name(dev, "reset-gpios", 0,
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&priv->reset_gpio,
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GPIOD_IS_OUT);
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#endif
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if (ret != -ENOENT)
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return ret;
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return 0;
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}
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static const struct udevice_id nop_phy_ids[] = {
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{ .compatible = "nop-phy" },
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{ .compatible = "usb-nop-xceiv" },
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{ }
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};
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static struct phy_ops nop_phy_ops = {
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.init = nop_phy_init,
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#if CONFIG_IS_ENABLED(DM_GPIO)
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.reset = nop_phy_reset,
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#endif
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};
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U_BOOT_DRIVER(nop_phy) = {
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.name = "nop_phy",
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.id = UCLASS_PHY,
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.of_match = nop_phy_ids,
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.ops = &nop_phy_ops,
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.probe = nop_phy_probe,
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.priv_auto = sizeof(struct nop_phy_priv),
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};
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