disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/phy/lantiq/phy-lantiq-rcu-usb2.c
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@@ -1,12 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Lantiq XWAY SoC RCU module based USB 1.1/2.0 PHY driver
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  *
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  * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
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  * Copyright (C) 2017 Hauke Mehrtens <hauke@hauke-m.de>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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 #include <linux/clk.h>
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@@ -127,8 +124,16 @@
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 	reset_control_deassert(priv->phy_reset);
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 	ret = clk_prepare_enable(priv->phy_gate_clk);
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-	if (ret)
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+	if (ret) {
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 		dev_err(dev, "failed to enable PHY gate\n");
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+		return ret;
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+	}
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+
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+	/*
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+	 * at least the xrx200 usb2 phy requires some extra time to be
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+	 * operational after enabling the clock
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+	 */
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+	usleep_range(100, 200);
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 	return ret;
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 }
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@@ -144,7 +149,7 @@
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 	return 0;
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 }
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-static struct phy_ops ltq_rcu_usb2_phy_ops = {
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+static const struct phy_ops ltq_rcu_usb2_phy_ops = {
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 	.init		= ltq_rcu_usb2_phy_init,
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 	.power_on	= ltq_rcu_usb2_phy_power_on,
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 	.power_off	= ltq_rcu_usb2_phy_power_off,
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@@ -195,10 +200,8 @@
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 	}
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 	priv->phy_reset = devm_reset_control_get_optional(dev, "phy");
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-	if (IS_ERR(priv->phy_reset))
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-		return PTR_ERR(priv->phy_reset);
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-	return 0;
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+	return PTR_ERR_OR_ZERO(priv->phy_reset);
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 }
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 static int ltq_rcu_usb2_phy_probe(struct platform_device *pdev)