mirror of
https://github.com/torvalds/linux
synced 2024-10-22 03:09:41 +00:00
2c8ea46d3e
We're not properly marking the glue layer/wrapper device as runtime active, so runtime PM believes that the hardware state is inactive when we call pm_runtime_enable() in this driver. This causes a problem when the glue layer has a power domain associated with it, because runtime PM will go and disable the power domain to match the 'inactive' state of the device. Let's mark the device as active so that runtime PM doesn't improperly power down this device when it's actually active. Acked-by: Peter Chen <peter.chen@nxp.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> Signed-off-by: Peter Chen <peter.chen@nxp.com>
120 lines
3 KiB
C
120 lines
3 KiB
C
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
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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 and
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* only version 2 as published by the Free Software Foundation.
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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/pm_runtime.h>
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#include <linux/usb/msm_hsusb_hw.h>
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#include <linux/usb/ulpi.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb/chipidea.h>
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#include "ci.h"
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#define MSM_USB_BASE (ci->hw_bank.abs)
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static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
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{
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struct device *dev = ci->gadget.dev.parent;
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switch (event) {
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case CI_HDRC_CONTROLLER_RESET_EVENT:
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dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
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writel(0, USB_AHBBURST);
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/* use AHB transactor, allow posted data writes */
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writel(0x8, USB_AHBMODE);
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usb_phy_init(ci->usb_phy);
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break;
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case CI_HDRC_CONTROLLER_STOPPED_EVENT:
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dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n");
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/*
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* Put the phy in non-driving mode. Otherwise host
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* may not detect soft-disconnection.
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*/
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usb_phy_notify_disconnect(ci->usb_phy, USB_SPEED_UNKNOWN);
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break;
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default:
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dev_dbg(dev, "unknown ci_hdrc event\n");
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break;
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}
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}
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static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
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.name = "ci_hdrc_msm",
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.capoffset = DEF_CAPOFFSET,
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.flags = CI_HDRC_REGS_SHARED |
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CI_HDRC_DISABLE_STREAMING,
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.notify_event = ci_hdrc_msm_notify_event,
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};
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static int ci_hdrc_msm_probe(struct platform_device *pdev)
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{
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struct platform_device *plat_ci;
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struct usb_phy *phy;
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dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");
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/*
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* OTG(PHY) driver takes care of PHY initialization, clock management,
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* powering up VBUS, mapping of registers address space and power
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* management.
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*/
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phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
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if (IS_ERR(phy))
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return PTR_ERR(phy);
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ci_hdrc_msm_platdata.usb_phy = phy;
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plat_ci = ci_hdrc_add_device(&pdev->dev,
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pdev->resource, pdev->num_resources,
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&ci_hdrc_msm_platdata);
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if (IS_ERR(plat_ci)) {
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dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
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return PTR_ERR(plat_ci);
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}
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platform_set_drvdata(pdev, plat_ci);
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pm_runtime_set_active(&pdev->dev);
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pm_runtime_no_callbacks(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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return 0;
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}
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static int ci_hdrc_msm_remove(struct platform_device *pdev)
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{
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struct platform_device *plat_ci = platform_get_drvdata(pdev);
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pm_runtime_disable(&pdev->dev);
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ci_hdrc_remove_device(plat_ci);
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return 0;
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}
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static const struct of_device_id msm_ci_dt_match[] = {
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{ .compatible = "qcom,ci-hdrc", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
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static struct platform_driver ci_hdrc_msm_driver = {
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.probe = ci_hdrc_msm_probe,
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.remove = ci_hdrc_msm_remove,
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.driver = {
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.name = "msm_hsusb",
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.of_match_table = msm_ci_dt_match,
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},
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};
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module_platform_driver(ci_hdrc_msm_driver);
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MODULE_ALIAS("platform:msm_hsusb");
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MODULE_ALIAS("platform:ci13xxx_msm");
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MODULE_LICENSE("GPL v2");
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