diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pcie_dw_mvebu.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pci/pcie_dw_mvebu.c b/drivers/pci/pcie_dw_mvebu.c index 17fa024..d4776a9 100644 --- a/drivers/pci/pcie_dw_mvebu.c +++ b/drivers/pci/pcie_dw_mvebu.c @@ -15,6 +15,7 @@ #include <dm.h> #include <pci.h> #include <asm/io.h> +#include <asm-generic/gpio.h> DECLARE_GLOBAL_DATA_PTR; @@ -461,6 +462,25 @@ static int pcie_dw_mvebu_probe(struct udevice *dev) struct pcie_dw_mvebu *pcie = dev_get_priv(dev); struct udevice *ctlr = pci_get_controller(dev); struct pci_controller *hose = dev_get_uclass_priv(ctlr); +#ifdef CONFIG_DM_GPIO + struct gpio_desc reset_gpio; + + gpio_request_by_name(dev, "marvell,reset-gpio", 0, &reset_gpio, + GPIOD_IS_OUT); + /* + * Issue reset to add-in card trough the dedicated GPIO. + * Some boards are connecting the card reset pin to common system + * reset wire and others are using separate GPIO port. + * In the last case we have to release a reset of the addon card + * using this GPIO. + */ + if (dm_gpio_is_valid(&reset_gpio)) { + dm_gpio_set_value(&reset_gpio, 1); + mdelay(200); + } +#else + debug("PCIE Reset on GPIO support is missing\n"); +#endif /* CONFIG_DM_GPIO */ pcie->first_busno = dev->seq; |