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| author | Lucas Stach <l.stach@pengutronix.de> | 2018-08-01 10:38:31 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-08-08 09:28:04 +0200 |
| commit | f345734707954466350b9d0f8e478ed06951a402 (patch) | |
| tree | ff736c28140248d596c95b3ba2c634cd50cf2e53 | |
| parent | fc2c618c2038dda38830d1bfaea7af5b38944f3f (diff) | |
| download | barebox-f345734707954466350b9d0f8e478ed06951a402.tar.gz barebox-f345734707954466350b9d0f8e478ed06951a402.tar.xz | |
ARM: imx6: gw54xx: add fixup for PCIe switch
After the PCIe switch has been scanned its GPIOs need to be
configured as output-high to release the devices behind the
switch from their reset state and make them discoverable to
the bus scan.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/boards/gateworks-ventana/board.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/boards/gateworks-ventana/board.c b/arch/arm/boards/gateworks-ventana/board.c index 3ff142ee42..6f9e0343be 100644 --- a/arch/arm/boards/gateworks-ventana/board.c +++ b/arch/arm/boards/gateworks-ventana/board.c @@ -17,6 +17,7 @@ #include <i2c/i2c.h> #include <init.h> #include <linux/marvell_phy.h> +#include <linux/pci.h> #include <linux/phy.h> #include <mach/bbu.h> #include <mach/imx6.h> @@ -111,3 +112,31 @@ static int gw54xx_coredevices_init(void) return 0; } coredevice_initcall(gw54xx_coredevices_init); + +/* + * 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); + + mdelay(100); +} +DECLARE_PCI_FIXUP_EARLY(0x10b5, 0x8609, ventana_pciesw_early_fixup); +DECLARE_PCI_FIXUP_EARLY(0x10b5, 0x8606, ventana_pciesw_early_fixup); +DECLARE_PCI_FIXUP_EARLY(0x10b5, 0x8604, ventana_pciesw_early_fixup); |