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
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.
10 Signed-off-by: Tim Harvey <tharvey@gateworks.com>
11 Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
13 arch/arm/mach-imx/mach-imx6q.c | 30 ++++++++++++++++++++++++++++++
14 1 file changed, 30 insertions(+)
16 --- a/arch/arm/mach-imx/mach-imx6q.c
17 +++ b/arch/arm/mach-imx/mach-imx6q.c
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 @@ -78,6 +80,34 @@ static int ksz9031rn_phy_fixup(struct phy_device *dev)
31 + * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
32 + * as they are used for slots1-7 PERST#
34 +static void ventana_pciesw_early_fixup(struct pci_dev *dev)
38 + if (!of_machine_is_compatible("gw,ventana"))
41 + if (dev->devfn != 0)
44 + pci_read_config_dword(dev, 0x62c, &dw);
45 + dw |= 0xaaa8; // GPIO1-7 outputs
46 + pci_write_config_dword(dev, 0x62c, dw);
48 + pci_read_config_dword(dev, 0x644, &dw);
49 + dw |= 0xfe; // GPIO1-7 output high
50 + pci_write_config_dword(dev, 0x644, dw);
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);
58 static int ar8031_phy_fixup(struct phy_device *dev)