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-rw-r--r--target/linux/octeontx/patches-5.10/0004-PCI-add-quirk-for-Gateworks-PLX-PEX860x-switch-with-.patch59
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/octeontx/patches-5.10/0004-PCI-add-quirk-for-Gateworks-PLX-PEX860x-switch-with-.patch b/target/linux/octeontx/patches-5.10/0004-PCI-add-quirk-for-Gateworks-PLX-PEX860x-switch-with-.patch
new file mode 100644
index 0000000000..e33a28e953
--- /dev/null
+++ b/target/linux/octeontx/patches-5.10/0004-PCI-add-quirk-for-Gateworks-PLX-PEX860x-switch-with-.patch
@@ -0,0 +1,59 @@
+From d0ff7a1bcfe886cab1a237895b08ac51ecfe10e7 Mon Sep 17 00:00:00 2001
+From: Tim Harvey <tharvey@gateworks.com>
+Date: Wed, 10 Apr 2019 08:00:47 -0700
+Subject: [PATCH 04/12] PCI: add quirk for Gateworks PLX PEX860x switch with
+ GPIO PERST#
+
+Gateworks boards use PLX PEX860x switches where downstream ports
+have their PERST# driven from the PEX GPIO.
+
+Signed-off-by: Tim Harvey <tharvey@gateworks.com>
+---
+ drivers/pci/quirks.c | 32 ++++++++++++++++++++++++++++++++
+ 1 file changed, 32 insertions(+)
+
+--- a/drivers/pci/quirks.c
++++ b/drivers/pci/quirks.c
+@@ -25,6 +25,7 @@
+ #include <linux/ktime.h>
+ #include <linux/mm.h>
+ #include <linux/nvme.h>
++#include <linux/of.h>
+ #include <linux/platform_data/x86/apple.h>
+ #include <linux/pm_runtime.h>
+ #include <linux/switchtec.h>
+@@ -5625,3 +5626,34 @@ static void apex_pci_fixup_class(struct
+ }
+ DECLARE_PCI_FIXUP_CLASS_HEADER(0x1ac1, 0x089a,
+ PCI_CLASS_NOT_DEFINED, 8, apex_pci_fixup_class);
++
++#ifdef CONFIG_PCI_HOST_THUNDER_PEM
++/*
++ * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
++ * as they are used for slots1-7 PERST#
++ */
++static void newport_pciesw_early_fixup(struct pci_dev *dev)
++{
++ u32 dw;
++
++ if (!of_machine_is_compatible("gw,newport"))
++ return;
++
++ if (dev->devfn != 0)
++ return;
++
++ dev_info(&dev->dev, "de-asserting PERST#\n");
++ 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, newport_pciesw_early_fixup);
++DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, newport_pciesw_early_fixup);
++DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, newport_pciesw_early_fixup);
++#endif /* CONFIG_PCI_HOST_THUNDER_PEM */