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b4f214f044
This patch adds USB PHY driver for MediaTek MT7620 SoC Reviewed-by: Stefan Roese <sr@denx.de> Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 MediaTek Inc. All Rights Reserved.
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*
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* Author: Weijie Gao <weijie.gao@mediatek.com>
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*/
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#include <clk.h>
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#include <dm.h>
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#include <generic-phy.h>
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#include <misc.h>
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#include <reset.h>
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#include <dm/device_compat.h>
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#include <linux/delay.h>
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#include <mach/mt7620-sysc.h>
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struct mt7620_usb_phy {
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struct udevice *sysc;
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struct clk_bulk clocks;
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struct reset_ctl_bulk resets;
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};
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static int mt7620_usb_phy_power_on(struct phy *_phy)
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{
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struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev);
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u32 mode = MT7620_SYSC_USB_HOST_MODE;
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int ret;
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reset_deassert_bulk(&phy->resets);
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clk_enable_bulk(&phy->clocks);
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mdelay(10);
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ret = misc_ioctl(phy->sysc, MT7620_SYSC_IOCTL_SET_USB_MODE, &mode);
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if (ret) {
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dev_err(_phy->dev,
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"mt7620_usbphy: failed to set USB host mode\n");
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return ret;
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}
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mdelay(10);
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return 0;
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}
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static int mt7620_usb_phy_power_off(struct phy *_phy)
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{
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struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev);
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clk_disable_bulk(&phy->clocks);
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reset_assert_bulk(&phy->resets);
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return 0;
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}
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static int mt7620_usb_phy_probe(struct udevice *dev)
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{
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struct mt7620_usb_phy *phy = dev_get_priv(dev);
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struct ofnode_phandle_args sysc_args;
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int ret;
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ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), "mediatek,sysc", NULL,
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0, 0, &sysc_args);
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if (ret) {
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dev_err(dev, "mt7620_usbphy: sysc property not found\n");
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return ret;
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}
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ret = uclass_get_device_by_ofnode(UCLASS_MISC, sysc_args.node,
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&phy->sysc);
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if (ret) {
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dev_err(dev, "mt7620_usbphy: failed to sysc device\n");
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return ret;
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}
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ret = clk_get_bulk(dev, &phy->clocks);
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if (ret) {
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dev_err(dev, "mt7620_usbphy: failed to get clocks\n");
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return ret;
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}
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ret = reset_get_bulk(dev, &phy->resets);
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if (ret) {
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dev_err(dev, "mt7620_usbphy: failed to get reset control\n");
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return ret;
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}
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return 0;
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}
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static struct phy_ops mt7620_usb_phy_ops = {
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.power_on = mt7620_usb_phy_power_on,
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.power_off = mt7620_usb_phy_power_off,
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};
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static const struct udevice_id mt7620_usb_phy_ids[] = {
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{ .compatible = "mediatek,mt7620-usbphy" },
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{ }
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};
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U_BOOT_DRIVER(mt7620_usb_phy) = {
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.name = "mt7620_usb_phy",
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.id = UCLASS_PHY,
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.of_match = mt7620_usb_phy_ids,
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.ops = &mt7620_usb_phy_ops,
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.probe = mt7620_usb_phy_probe,
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.priv_auto = sizeof(struct mt7620_usb_phy),
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};
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