target/linux/imx6/patches-3.10/120-ventana-init.ptach

   1 Many of the Gateworks Ventana boards use a PLX PEX860X PCIe Switch
   2 and utilize its GPIO outputs as PERST# for downstream ports.  This
   3 patch configures them appropriately during enumeration.
   4
   5 Additionally many of the Ventana boards use CKO1 as the clock input for
   6 an analog audio codec which is setup here.
   7
   8 --- a/arch/arm/mach-imx/mach-imx6q.c
   9 +++ b/arch/arm/mach-imx/mach-imx6q.c
  10 @@ -25,6 +25,7 @@
  11  #include <linux/of_irq.h>
  12  #include <linux/of_platform.h>
  13  #include <linux/opp.h>
  14 +#include <linux/pci.h>
  15  #include <linux/phy.h>
  16  #include <linux/regmap.h>
  17  #include <linux/micrel_phy.h>
  18 @@ -145,6 +146,42 @@ static void __init imx6q_sabrelite_init(
  19         imx6q_sabrelite_cko1_setup();
  20  }
  21
  22 +/*
  23 + * fixup for PEX 8909 bridge to configure GPIO1-7 as output High
  24 + * as they are used for slots1-7 PERST#
  25 + */
  26 +static void mx6_ventana_pciesw_early_fixup(struct pci_dev *dev)
  27 +{
  28 +       u32 dw;
  29 +
  30 +       if (!of_machine_is_compatible("gw,ventana"))
  31 +               return;
  32 +
  33 +       if (dev->devfn != 0)
  34 +               return;
  35 +
  36 +       pci_read_config_dword(dev, 0x62c, &dw);
  37 +       dw |= 0xaaa8; // GPIO1-7 outputs
  38 +       pci_write_config_dword(dev, 0x62c, dw);
  39 +
  40 +       pci_read_config_dword(dev, 0x644, &dw);
  41 +       dw |= 0xfe;   // GPIO1-7 output high
  42 +       pci_write_config_dword(dev, 0x644, dw);
  43 +
  44 +       mdelay(100);
  45 +}
  46 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609,
  47 +       mx6_ventana_pciesw_early_fixup);
  48 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606,
  49 +       mx6_ventana_pciesw_early_fixup);
  50 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604,
  51 +       mx6_ventana_pciesw_early_fixup);
  52 +
  53 +static void __init imx6q_ventana_init(void)
  54 +{
  55 +       imx6q_sabrelite_cko1_setup();
  56 +}
  57 +
  58  static void __init imx6q_1588_init(void)
  59  {
  60         struct regmap *gpr;
  61 @@ -163,6 +200,9 @@ static void __init imx6q_usb_init(void)
  62
  63  static void __init imx6q_init_machine(void)
  64  {
  65 +       if (of_machine_is_compatible("gw,ventana"))
  66 +               imx6q_ventana_init();
  67 +
  68         if (of_machine_is_compatible("fsl,imx6q-sabrelite"))
  69                 imx6q_sabrelite_init();
  70