5306661eff
The filename of am35x-phy-control.h is confusing. The header is used by the am335x phy driver, but the filename refers to am35x. Even worse there is indeed another device called am35x but it does not use this header at all. Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/usb_phy_generic.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/regulator/consumer.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include "phy-am335x-control.h"
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#include "phy-generic.h"
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struct am335x_phy {
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struct usb_phy_generic usb_phy_gen;
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struct phy_control *phy_ctrl;
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int id;
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};
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static int am335x_init(struct usb_phy *phy)
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{
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struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
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return 0;
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}
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static void am335x_shutdown(struct usb_phy *phy)
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{
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struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
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}
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static int am335x_phy_probe(struct platform_device *pdev)
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{
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struct am335x_phy *am_phy;
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struct device *dev = &pdev->dev;
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int ret;
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am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
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if (!am_phy)
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return -ENOMEM;
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am_phy->phy_ctrl = am335x_get_phy_control(dev);
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if (!am_phy->phy_ctrl)
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return -EPROBE_DEFER;
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am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
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if (am_phy->id < 0) {
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dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
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return am_phy->id;
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}
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ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen, NULL);
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if (ret)
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return ret;
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ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
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if (ret)
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return ret;
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am_phy->usb_phy_gen.phy.init = am335x_init;
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am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;
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platform_set_drvdata(pdev, am_phy);
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device_init_wakeup(dev, true);
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/*
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* If we leave PHY wakeup enabled then AM33XX wakes up
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* immediately from DS0. To avoid this we mark dev->power.can_wakeup
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* to false. The same is checked in suspend routine to decide
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* on whether to enable PHY wakeup or not.
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* PHY wakeup works fine in standby mode, there by allowing us to
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* handle remote wakeup, wakeup on disconnect and connect.
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*/
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device_set_wakeup_enable(dev, false);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
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return 0;
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}
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static int am335x_phy_remove(struct platform_device *pdev)
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{
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struct am335x_phy *am_phy = platform_get_drvdata(pdev);
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usb_remove_phy(&am_phy->usb_phy_gen.phy);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int am335x_phy_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct am335x_phy *am_phy = platform_get_drvdata(pdev);
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/*
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* Enable phy wakeup only if dev->power.can_wakeup is true.
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* Make sure to enable wakeup to support remote wakeup in
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* standby mode ( same is not supported in OFF(DS0) mode).
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* Enable it by doing
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* echo enabled > /sys/bus/platform/devices/<usb-phy-id>/power/wakeup
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*/
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if (device_may_wakeup(dev))
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phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
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return 0;
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}
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static int am335x_phy_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct am335x_phy *am_phy = platform_get_drvdata(pdev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
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if (device_may_wakeup(dev))
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phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(am335x_pm_ops, am335x_phy_suspend, am335x_phy_resume);
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static const struct of_device_id am335x_phy_ids[] = {
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{ .compatible = "ti,am335x-usb-phy" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, am335x_phy_ids);
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static struct platform_driver am335x_phy_driver = {
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.probe = am335x_phy_probe,
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.remove = am335x_phy_remove,
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.driver = {
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.name = "am335x-phy-driver",
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.pm = &am335x_pm_ops,
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.of_match_table = am335x_phy_ids,
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},
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};
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module_platform_driver(am335x_phy_driver);
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MODULE_LICENSE("GPL v2");
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