diff options
| author | Konstantin Porotchkin <kostap@marvell.com> | 2017-02-08 17:34:13 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2017-03-23 08:45:25 +0100 |
| commit | 130b53ec79f3f1b1349d409f08f1f17e68a15f96 (patch) | |
| tree | 07151fdfc5d350454539d9d79d70394cf689650b /drivers/pci/pcie_dw_mvebu.c | |
| parent | d9fb41a3e195f5d655eecfad6437ea42ba5c8062 (diff) | |
mvebu: pcie: Add support for GPIO reset for PCIe device
Add support for "marvell,reset-gpio" property to mvebu DW PCIe
driver.
This option is valid when CONFIG_DM_GPIO=y
Change-Id: Ic17c500449050c2fbb700731f1a9ca8b83298986
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Neta Zur Hershkovits <neta@marvell.com>
Cc: Igal Liberman <igall@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers/pci/pcie_dw_mvebu.c')
| -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 17fa0244d0..d4776a9c81 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; |