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fb3967b95c
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* phy-keystone - USB PHY, talking to dwc3 controller in Keystone.
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*
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* Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
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*
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* Author: WingMan Kwok <w-kwok2@ti.com>
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/usb/usb_phy_generic.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include "phy-generic.h"
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/* USB PHY control register offsets */
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#define USB_PHY_CTL_UTMI 0x0000
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#define USB_PHY_CTL_PIPE 0x0004
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#define USB_PHY_CTL_PARAM_1 0x0008
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#define USB_PHY_CTL_PARAM_2 0x000c
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#define USB_PHY_CTL_CLOCK 0x0010
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#define USB_PHY_CTL_PLL 0x0014
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#define PHY_REF_SSP_EN BIT(29)
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struct keystone_usbphy {
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struct usb_phy_generic usb_phy_gen;
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void __iomem *phy_ctrl;
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};
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static inline u32 keystone_usbphy_readl(void __iomem *base, u32 offset)
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{
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return readl(base + offset);
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}
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static inline void keystone_usbphy_writel(void __iomem *base,
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u32 offset, u32 value)
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{
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writel(value, base + offset);
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}
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static int keystone_usbphy_init(struct usb_phy *phy)
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{
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struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev);
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u32 val;
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val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK);
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keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK,
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val | PHY_REF_SSP_EN);
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return 0;
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}
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static void keystone_usbphy_shutdown(struct usb_phy *phy)
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{
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struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev);
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u32 val;
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val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK);
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keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK,
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val &= ~PHY_REF_SSP_EN);
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}
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static int keystone_usbphy_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct keystone_usbphy *k_phy;
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struct resource *res;
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int ret;
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k_phy = devm_kzalloc(dev, sizeof(*k_phy), GFP_KERNEL);
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if (!k_phy)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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k_phy->phy_ctrl = devm_ioremap_resource(dev, res);
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if (IS_ERR(k_phy->phy_ctrl))
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return PTR_ERR(k_phy->phy_ctrl);
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ret = usb_phy_gen_create_phy(dev, &k_phy->usb_phy_gen, NULL);
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if (ret)
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return ret;
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k_phy->usb_phy_gen.phy.init = keystone_usbphy_init;
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k_phy->usb_phy_gen.phy.shutdown = keystone_usbphy_shutdown;
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platform_set_drvdata(pdev, k_phy);
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return usb_add_phy_dev(&k_phy->usb_phy_gen.phy);
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}
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static int keystone_usbphy_remove(struct platform_device *pdev)
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{
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struct keystone_usbphy *k_phy = platform_get_drvdata(pdev);
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usb_remove_phy(&k_phy->usb_phy_gen.phy);
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return 0;
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}
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static const struct of_device_id keystone_usbphy_ids[] = {
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{ .compatible = "ti,keystone-usbphy" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, keystone_usbphy_ids);
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static struct platform_driver keystone_usbphy_driver = {
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.probe = keystone_usbphy_probe,
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.remove = keystone_usbphy_remove,
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.driver = {
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.name = "keystone-usbphy",
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.of_match_table = keystone_usbphy_ids,
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},
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};
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module_platform_driver(keystone_usbphy_driver);
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MODULE_ALIAS("platform:keystone-usbphy");
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MODULE_AUTHOR("Texas Instruments Inc.");
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MODULE_DESCRIPTION("Keystone USB phy driver");
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MODULE_LICENSE("GPL v2");
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