[RFC 06/10] pcie: starfive: Add a optional power gpio support

[Hal Feng]

Get a optional power gpio and enable it if it is valid.

Signed-off-by: Hal Feng <hal.f...@starfivetech.com>
---
 drivers/pci/pcie_starfive_jh7110.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/pci/pcie_starfive_jh7110.c 
b/drivers/pci/pcie_starfive_jh7110.c
index 51aca7359ff..f6b50d12a90 100644
--- a/drivers/pci/pcie_starfive_jh7110.c
+++ b/drivers/pci/pcie_starfive_jh7110.c
@@ -45,6 +45,7 @@ struct starfive_pcie {
        struct pcie_plda plda;
        struct clk_bulk clks;
        struct reset_ctl_bulk   rsts;
+       struct gpio_desc        power_gpio;
        struct gpio_desc        reset_gpio;
        struct regmap *regmap;
        unsigned int stg_pcie_base;
@@ -184,6 +185,10 @@ static int starfive_pcie_parse_dt(struct udevice *dev)
                dev_err(dev, "reset-gpio is not valid\n");
                return -EINVAL;
        }
+
+       gpio_request_by_name(dev, "enable-gpios", 0, &priv->power_gpio,
+                            GPIOD_IS_OUT);
+
        return 0;
 }
 
@@ -205,6 +210,9 @@ static int starfive_pcie_init_port(struct udevice *dev)
                goto err_deassert_clk;
        }
 
+       if (dm_gpio_is_valid(&priv->power_gpio))
+               dm_gpio_set_value(&priv->power_gpio, 1);
+
        dm_gpio_set_value(&priv->reset_gpio, 1);
        /* Disable physical functions except #0 */
        for (i = 1; i < PLDA_FUNC_NUM; i++) {
-- 
2.43.2