target/linux/generic/patches-3.6/004-usb-host-ohci-platform-add-platform-specific-power-c.patch

   1 From e4d37aeb373a5edceecc1dadc76fabbe8bc18e44 Mon Sep 17 00:00:00 2001
   2 From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   3 Date: Mon, 6 Aug 2012 18:09:10 -0700
   4 Subject: [PATCH] usb: host: ohci-platform: add platform specific power callback
   5
   6 Commit e4d37aeb373a5edceecc1dadc76fabbe8bc18e44 upstream.
   7
   8 This patch enables to call platform specific power callback function.
   9
  10 Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
  11 Acked-by: Alan Stern <stern@rowland.harvard.edu>
  12 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  13 ---
  14  drivers/usb/host/ohci-platform.c |   36 ++++++++++++++++++++++++++++++++++--
  15  include/linux/usb/ohci_pdriver.h |    8 ++++++++
  16  2 files changed, 42 insertions(+), 2 deletions(-)
  17
  18 --- a/drivers/usb/host/ohci-platform.c
  19 +++ b/drivers/usb/host/ohci-platform.c
  20 @@ -107,10 +107,18 @@ static int __devinit ohci_platform_probe
  21                 return -ENXIO;
  22         }
  23
  24 +       if (pdata->power_on) {
  25 +               err = pdata->power_on(dev);
  26 +               if (err < 0)
  27 +                       return err;
  28 +       }
  29 +
  30         hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
  31                         dev_name(&dev->dev));
  32 -       if (!hcd)
  33 -               return -ENOMEM;
  34 +       if (!hcd) {
  35 +               err = -ENOMEM;
  36 +               goto err_power;
  37 +       }
  38
  39         hcd->rsrc_start = res_mem->start;
  40         hcd->rsrc_len = resource_size(res_mem);
  41 @@ -138,12 +146,17 @@ err_release_region:
  42         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  43  err_put_hcd:
  44         usb_put_hcd(hcd);
  45 +err_power:
  46 +       if (pdata->power_off)
  47 +               pdata->power_off(dev);
  48 +
  49         return err;
  50  }
  51
  52  static int __devexit ohci_platform_remove(struct platform_device *dev)
  53  {
  54         struct usb_hcd *hcd = platform_get_drvdata(dev);
  55 +       struct usb_ohci_pdata *pdata = dev->dev.platform_data;
  56
  57         usb_remove_hcd(hcd);
  58         iounmap(hcd->regs);
  59 @@ -151,6 +164,9 @@ static int __devexit ohci_platform_remov
  60         usb_put_hcd(hcd);
  61         platform_set_drvdata(dev, NULL);
  62
  63 +       if (pdata->power_off)
  64 +               pdata->power_off(dev);
  65 +
  66         return 0;
  67  }
  68
  69 @@ -158,12 +174,28 @@ static int __devexit ohci_platform_remov
  70
  71  static int ohci_platform_suspend(struct device *dev)
  72  {
  73 +       struct usb_ohci_pdata *pdata = dev->platform_data;
  74 +       struct platform_device *pdev =
  75 +               container_of(dev, struct platform_device, dev);
  76 +
  77 +       if (pdata->power_suspend)
  78 +               pdata->power_suspend(pdev);
  79 +
  80         return 0;
  81  }
  82
  83  static int ohci_platform_resume(struct device *dev)
  84  {
  85         struct usb_hcd *hcd = dev_get_drvdata(dev);
  86 +       struct usb_ohci_pdata *pdata = dev->platform_data;
  87 +       struct platform_device *pdev =
  88 +               container_of(dev, struct platform_device, dev);
  89 +
  90 +       if (pdata->power_on) {
  91 +               int err = pdata->power_on(pdev);
  92 +               if (err < 0)
  93 +                       return err;
  94 +       }
  95
  96         ohci_finish_controller_resume(hcd);
  97         return 0;
  98 --- a/include/linux/usb/ohci_pdriver.h
  99 +++ b/include/linux/usb/ohci_pdriver.h
 100 @@ -33,6 +33,14 @@ struct usb_ohci_pdata {
 101         unsigned        big_endian_desc:1;
 102         unsigned        big_endian_mmio:1;
 103         unsigned        no_big_frame_no:1;
 104 +
 105 +       /* Turn on all power and clocks */
 106 +       int (*power_on)(struct platform_device *pdev);
 107 +       /* Turn off all power and clocks */
 108 +       void (*power_off)(struct platform_device *pdev);
 109 +       /* Turn on only VBUS suspend power and hotplug detection,
 110 +        * turn off everything else */
 111 +       void (*power_suspend)(struct platform_device *pdev);
 112  };
 113
 114  #endif /* __USB_CORE_OHCI_PDRIVER_H */