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usb: phy: am335x: add wakeup support
This is based on George Cherian's patch which added power & wakeup support to am335x and does no longer apply since I took some if the code apart in favor of the multi instance support. This compiles and I boots and later it detects a device after I plug it in :) Could somebody please test it so it does what it should? Cc: George Cherian <george.cherian@ti.com> Reviewed-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com>
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4d175f340c
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2 changed files with 77 additions and 0 deletions
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@ -26,6 +26,41 @@ struct am335x_control_usb {
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#define USBPHY_OTGVDET_EN (1 << 19)
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#define USBPHY_OTGSESSEND_EN (1 << 20)
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#define AM335X_PHY0_WK_EN (1 << 0)
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#define AM335X_PHY1_WK_EN (1 << 8)
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static void am335x_phy_wkup(struct phy_control *phy_ctrl, u32 id, bool on)
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{
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struct am335x_control_usb *usb_ctrl;
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u32 val;
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u32 reg;
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usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
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switch (id) {
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case 0:
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reg = AM335X_PHY0_WK_EN;
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break;
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case 1:
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reg = AM335X_PHY1_WK_EN;
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break;
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default:
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WARN_ON(1);
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return;
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}
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spin_lock(&usb_ctrl->lock);
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val = readl(usb_ctrl->wkup);
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if (on)
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val |= reg;
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else
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val &= ~reg;
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writel(val, usb_ctrl->wkup);
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spin_unlock(&usb_ctrl->lock);
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}
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static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
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{
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struct am335x_control_usb *usb_ctrl;
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@ -59,6 +94,7 @@ static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
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static const struct phy_control ctrl_am335x = {
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.phy_power = am335x_phy_power,
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.phy_wkup = am335x_phy_wkup,
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};
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static const struct of_device_id omap_control_usb_id_table[] = {
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@ -117,6 +153,12 @@ static int am335x_control_usb_probe(struct platform_device *pdev)
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ctrl_usb->phy_reg = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(ctrl_usb->phy_reg))
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return PTR_ERR(ctrl_usb->phy_reg);
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wakeup");
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ctrl_usb->wkup = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(ctrl_usb->wkup))
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return PTR_ERR(ctrl_usb->wkup);
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spin_lock_init(&ctrl_usb->lock);
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ctrl_usb->phy_ctrl = *phy_ctrl;
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@ -78,6 +78,40 @@ static int am335x_phy_remove(struct platform_device *pdev)
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return 0;
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}
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#ifdef CONFIG_PM_RUNTIME
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static int am335x_phy_runtime_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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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_runtime_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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static const struct dev_pm_ops am335x_pm_ops = {
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SET_RUNTIME_PM_OPS(am335x_phy_runtime_suspend,
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am335x_phy_runtime_resume, NULL)
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};
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#define DEV_PM_OPS (&am335x_pm_ops)
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#else
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#define DEV_PM_OPS NULL
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#endif
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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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@ -90,6 +124,7 @@ static struct platform_driver am335x_phy_driver = {
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.driver = {
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.name = "am335x-phy-driver",
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.owner = THIS_MODULE,
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.pm = DEV_PM_OPS,
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.of_match_table = of_match_ptr(am335x_phy_ids),
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},
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};
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