target/linux/brcm2708/patches-4.1/0114-firmware-bcm2835-Support-ARCH_BCM270x.patch

   1 From 557c84f3819fd730a006af48f582bc7afd2a7bf6 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
   3 Date: Fri, 26 Jun 2015 14:25:01 +0200
   4 Subject: [PATCH 114/171] firmware: bcm2835: Support ARCH_BCM270x
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Support booting without Device Tree.
  10 Turn on USB power.
  11 Load driver early because of lacking support for deferred probing
  12 in many drivers.
  13
  14 Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
  15 ---
  16  drivers/firmware/raspberrypi.c | 41 +++++++++++++++++++++++++++++++++++++++--
  17  1 file changed, 39 insertions(+), 2 deletions(-)
  18
  19 --- a/drivers/firmware/raspberrypi.c
  20 +++ b/drivers/firmware/raspberrypi.c
  21 @@ -28,6 +28,8 @@ struct rpi_firmware {
  22         u32 enabled;
  23  };
  24
  25 +static struct platform_device *g_pdev;
  26 +
  27  static DEFINE_MUTEX(transaction_lock);
  28
  29  static void response_callback(struct mbox_client *cl, void *msg)
  30 @@ -183,6 +185,25 @@ rpi_firmware_print_firmware_revision(str
  31         }
  32  }
  33
  34 +static int raspberrypi_firmware_set_power(struct rpi_firmware *fw,
  35 +                                         u32 domain, bool on)
  36 +{
  37 +       struct {
  38 +               u32 domain;
  39 +               u32 on;
  40 +       } packet;
  41 +       int ret;
  42 +
  43 +       packet.domain = domain;
  44 +       packet.on = on;
  45 +       ret = rpi_firmware_property(fw, RPI_FIRMWARE_SET_POWER_STATE,
  46 +                                   &packet, sizeof(packet));
  47 +       if (!ret && packet.on != on)
  48 +               ret = -EINVAL;
  49 +
  50 +       return ret;
  51 +}
  52 +
  53  static int rpi_firmware_probe(struct platform_device *pdev)
  54  {
  55         struct device *dev = &pdev->dev;
  56 @@ -207,9 +228,13 @@ static int rpi_firmware_probe(struct pla
  57         init_completion(&fw->c);
  58
  59         platform_set_drvdata(pdev, fw);
  60 +       g_pdev = pdev;
  61
  62         rpi_firmware_print_firmware_revision(fw);
  63
  64 +       if (raspberrypi_firmware_set_power(fw, 3, true))
  65 +               dev_err(dev, "failed to turn on USB power\n");
  66 +
  67         return 0;
  68  }
  69
  70 @@ -218,6 +243,7 @@ static int rpi_firmware_remove(struct pl
  71         struct rpi_firmware *fw = platform_get_drvdata(pdev);
  72
  73         mbox_free_channel(fw->chan);
  74 +       g_pdev = NULL;
  75
  76         return 0;
  77  }
  78 @@ -230,7 +256,7 @@ static int rpi_firmware_remove(struct pl
  79   */
  80  struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
  81  {
  82 -       struct platform_device *pdev = of_find_device_by_node(firmware_node);
  83 +       struct platform_device *pdev = g_pdev;
  84
  85         if (!pdev)
  86                 return NULL;
  87 @@ -253,7 +279,18 @@ static struct platform_driver rpi_firmwa
  88         .probe          = rpi_firmware_probe,
  89         .remove         = rpi_firmware_remove,
  90  };
  91 -module_platform_driver(rpi_firmware_driver);
  92 +
  93 +static int __init rpi_firmware_init(void)
  94 +{
  95 +       return platform_driver_register(&rpi_firmware_driver);
  96 +}
  97 +subsys_initcall(rpi_firmware_init);
  98 +
  99 +static void __init rpi_firmware_exit(void)
 100 +{
 101 +       platform_driver_unregister(&rpi_firmware_driver);
 102 +}
 103 +module_exit(rpi_firmware_exit);
 104
 105  MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 106  MODULE_DESCRIPTION("Raspberry Pi firmware driver");