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pcie: starfive: Add a optional power gpio support

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Get and enable a optional power gpio. This feature is ported
from the jh7110 pcie driver in Linux. VisionFive 2 Lite needs
this gpio to enable the PCI bus device (M.2 M-Key) power.

Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
This commit is contained in:
Hal Feng
2025-10-24 16:59:29 +08:00
committed by Leo Yu-Chi Liang
parent ab4f610deb
commit a10587939b
1 changed files with 8 additions and 0 deletions
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8
drivers/pci/pcie_starfive_jh7110.c
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@@ -42,6 +42,7 @@ 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;
@@ -181,6 +182,10 @@ 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;
}
@@ -202,6 +207,9 @@ 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++) {