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

Hal Feng
2025-08-29T14:31:31Z

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

Signed-off-by: Hal Feng <hal.feng@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