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Commit 4bb1d09f authored by Tim Harvey's avatar Tim Harvey Committed by Shawn Guo
Browse files

ARM: imx: add PCI fixup for PEX860X on Gateworks board 



The PEX860X has GPIO's which are used for PCI Reset lines on the
Gateworks Ventana boards.  The GPIO's need to be set as output
level high so as to allow the PCIe devices to come out of reset.

Signed-off-by: default avatarTim Harvey <tharvey@gateworks.com>
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent 374b1057

arch/arm/mach-imx/mach-imx6q.c

+30 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/clk.h>

#include <linux/clkdev.h>

#include <linux/cpu.h>

#include <linux/delay.h>

#include <linux/export.h>

#include <linux/init.h>

#include <linux/io.h>
@@ -23,6 +24,7 @@ 
#include <linux/of_irq.h>

#include <linux/of_platform.h>

#include <linux/pm_opp.h>

#include <linux/pci.h>

#include <linux/phy.h>

#include <linux/reboot.h>

#include <linux/regmap.h>
@@ -78,6 +80,34 @@ static int ksz9031rn_phy_fixup(struct phy_device *dev) 
	return 0;

}



/*

 * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High

 * as they are used for slots1-7 PERST#

 */

static void ventana_pciesw_early_fixup(struct pci_dev *dev)

{

	u32 dw;



	if (!of_machine_is_compatible("gw,ventana"))

		return;



	if (dev->devfn != 0)

		return;



	pci_read_config_dword(dev, 0x62c, &dw);

	dw |= 0xaaa8; // GPIO1-7 outputs

	pci_write_config_dword(dev, 0x62c, dw);



	pci_read_config_dword(dev, 0x644, &dw);

	dw |= 0xfe;   // GPIO1-7 output high

	pci_write_config_dword(dev, 0x644, dw);



	msleep(100);

}

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup);

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup);

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup);



static int ar8031_phy_fixup(struct phy_device *dev)

{

	u16 val;