71 lines
1.9 KiB
Text
71 lines
1.9 KiB
Text
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Many of the Gateworks Ventana boards use a PLX PEX860X PCIe Switch
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and utilize its GPIO outputs as PERST# for downstream ports. This
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patch configures them appropriately during enumeration.
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Additionally many of the Ventana boards use CKO1 as the clock input for
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an analog audio codec which is setup here.
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--- a/arch/arm/mach-imx/mach-imx6q.c
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+++ b/arch/arm/mach-imx/mach-imx6q.c
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@@ -25,6 +25,7 @@
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/opp.h>
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+#include <linux/pci.h>
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#include <linux/phy.h>
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#include <linux/regmap.h>
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#include <linux/micrel_phy.h>
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@@ -145,6 +146,42 @@ static void __init imx6q_sabrelite_init(
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imx6q_sabrelite_cko1_setup();
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}
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+/*
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+ * fixup for PEX 8909 bridge to configure GPIO1-7 as output High
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+ * as they are used for slots1-7 PERST#
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+ */
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+static void mx6_ventana_pciesw_early_fixup(struct pci_dev *dev)
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+{
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+ u32 dw;
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+
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+ if (!of_machine_is_compatible("gw,ventana"))
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+ return;
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+
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+ if (dev->devfn != 0)
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+ return;
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+
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+ pci_read_config_dword(dev, 0x62c, &dw);
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+ dw |= 0xaaa8; // GPIO1-7 outputs
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+ pci_write_config_dword(dev, 0x62c, dw);
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+
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+ pci_read_config_dword(dev, 0x644, &dw);
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+ dw |= 0xfe; // GPIO1-7 output high
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+ pci_write_config_dword(dev, 0x644, dw);
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+
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+ mdelay(100);
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+}
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+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609,
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+ mx6_ventana_pciesw_early_fixup);
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+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606,
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+ mx6_ventana_pciesw_early_fixup);
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+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604,
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+ mx6_ventana_pciesw_early_fixup);
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+
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+static void __init imx6q_ventana_init(void)
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+{
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+ imx6q_sabrelite_cko1_setup();
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+}
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+
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static void __init imx6q_1588_init(void)
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{
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struct regmap *gpr;
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@@ -163,6 +200,9 @@ static void __init imx6q_usb_init(void)
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static void __init imx6q_init_machine(void)
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{
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+ if (of_machine_is_compatible("gw,ventana"))
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+ imx6q_ventana_init();
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+
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if (of_machine_is_compatible("fsl,imx6q-sabrelite"))
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imx6q_sabrelite_init();
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