target/linux/imx6/patches-3.12/0009-imx-add-PCI-fixup-for-PEX860X-on-Gateworks-board.patch

   1 From 079441036b20d9f3d23d1e96f0681b99349de05a Mon Sep 17 00:00:00 2001
   2 From: Tim Harvey <tharvey@gateworks.com>
   3 Date: Tue, 22 Oct 2013 21:51:28 -0700
   4 Subject: [PATCH] imx: add PCI fixup for PEX860X on Gateworks board
   5
   6 The PEX860X has GPIO's which are used for PCI Reset lines on the
   7 Gateworks Ventana boards.  The GPIO's need to be set as output
   8 level high so as to allow the PCIe devices to come out of reset.
   9
  10 Signed-off-by: Tim Harvey <tharvey@gateworks.com>
  11 Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
  12 ---
  13  arch/arm/mach-imx/mach-imx6q.c | 30 ++++++++++++++++++++++++++++++
  14  1 file changed, 30 insertions(+)
  15
  16 --- a/arch/arm/mach-imx/mach-imx6q.c
  17 +++ b/arch/arm/mach-imx/mach-imx6q.c
  18 @@ -26,6 +26,7 @@
  19  #include <linux/of_irq.h>
  20  #include <linux/of_platform.h>
  21  #include <linux/opp.h>
  22 +#include <linux/pci.h>
  23  #include <linux/phy.h>
  24  #include <linux/reboot.h>
  25  #include <linux/regmap.h>
  26 @@ -134,6 +135,34 @@ static int ksz9031rn_phy_fixup(struct ph
  27         return 0;
  28  }
  29
  30 +/*
  31 + * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
  32 + * as they are used for slots1-7 PERST#
  33 + */
  34 +static void ventana_pciesw_early_fixup(struct pci_dev *dev)
  35 +{
  36 +       u32 dw;
  37 +
  38 +       if (!of_machine_is_compatible("gw,ventana"))
  39 +               return;
  40 +
  41 +       if (dev->devfn != 0)
  42 +               return;
  43 +
  44 +       pci_read_config_dword(dev, 0x62c, &dw);
  45 +       dw |= 0xaaa8; // GPIO1-7 outputs
  46 +       pci_write_config_dword(dev, 0x62c, dw);
  47 +
  48 +       pci_read_config_dword(dev, 0x644, &dw);
  49 +       dw |= 0xfe;   // GPIO1-7 output high
  50 +       pci_write_config_dword(dev, 0x644, dw);
  51 +
  52 +       msleep(100);
  53 +}
  54 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup);
  55 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup);
  56 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup);
  57 +
  58  static int ar8031_phy_fixup(struct phy_device *dev)
  59  {
  60         u16 val;