diff options
Diffstat (limited to 'drivers/phy/lantiq/phy-lantiq-rcu-usb2.c')
| -rw-r--r-- | drivers/phy/lantiq/phy-lantiq-rcu-usb2.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/phy/lantiq/phy-lantiq-rcu-usb2.c b/drivers/phy/lantiq/phy-lantiq-rcu-usb2.c index f9e0dd19ff26..82f1ffc0b0ad 100644 --- a/drivers/phy/lantiq/phy-lantiq-rcu-usb2.c +++ b/drivers/phy/lantiq/phy-lantiq-rcu-usb2.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Lantiq XWAY SoC RCU module based USB 1.1/2.0 PHY driver * * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com> * Copyright (C) 2017 Hauke Mehrtens <hauke@hauke-m.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/clk.h> @@ -15,7 +12,6 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> -#include <linux/of_device.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/property.h> @@ -127,8 +123,16 @@ static int ltq_rcu_usb2_phy_power_on(struct phy *phy) reset_control_deassert(priv->phy_reset); ret = clk_prepare_enable(priv->phy_gate_clk); - if (ret) + if (ret) { dev_err(dev, "failed to enable PHY gate\n"); + return ret; + } + + /* + * at least the xrx200 usb2 phy requires some extra time to be + * operational after enabling the clock + */ + usleep_range(100, 200); return ret; } @@ -144,7 +148,7 @@ static int ltq_rcu_usb2_phy_power_off(struct phy *phy) return 0; } -static struct phy_ops ltq_rcu_usb2_phy_ops = { +static const struct phy_ops ltq_rcu_usb2_phy_ops = { .init = ltq_rcu_usb2_phy_init, .power_on = ltq_rcu_usb2_phy_power_on, .power_off = ltq_rcu_usb2_phy_power_off, |