[PATCH v4 1/6] PCI: starfive: Use regulator APIs instead of GPIO APIs to enable the 3V3 power supply of PCIe slots

Hal Feng
2025-11-25T07:56:45Z

The "enable-gpio" property is not documented in the dt-bindings and
using GPIO APIs is not a standard method to enable or disable PCIe
slot power, so use regulator APIs to replace them.

Tested-by: Matthias Brugger <mbrugger@suse.com>
Fixes: 39b91eb40c6a ("PCI: starfive: Add JH7110 PCIe controller")
Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
---
drivers/pci/controller/plda/pcie-starfive.c | 25 ++++++++++++---------
1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/pci/controller/plda/pcie-starfive.c b/drivers/pci/controller/plda/pcie-starfive.c
index 3caf53c6c082..298036c3e7f9 100644
--- a/drivers/pci/controller/plda/pcie-starfive.c
+++ b/drivers/pci/controller/plda/pcie-starfive.c
@@ -55,7 +55,7 @@ struct starfive_jh7110_pcie {
struct reset_control *resets;
struct clk_bulk_data *clks;
struct regmap *reg_syscon;
- struct gpio_desc *power_gpio;
+ struct regulator *vpcie3v3;
struct gpio_desc *reset_gpio;
struct phy *phy;

@@ -153,11 +153,13 @@ static int starfive_pcie_parse_dt(struct starfive_jh7110_pcie *pcie,
return dev_err_probe(dev, PTR_ERR(pcie->reset_gpio),
"failed to get perst-gpio\n");

- pcie->power_gpio = devm_gpiod_get_optional(dev, "enable",
- GPIOD_OUT_LOW);
- if (IS_ERR(pcie->power_gpio))
- return dev_err_probe(dev, PTR_ERR(pcie->power_gpio),
- "failed to get power-gpio\n");
+ pcie->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
+ if (IS_ERR(pcie->vpcie3v3)) {
+ if (PTR_ERR(pcie->vpcie3v3) != -ENODEV)
+ return dev_err_probe(dev, PTR_ERR(pcie->vpcie3v3),
+ "failed to get vpcie3v3 regulator\n");
+ pcie->vpcie3v3 = NULL;
+ }

return 0;
}
@@ -270,8 +272,8 @@ static void starfive_pcie_host_deinit(struct plda_pcie_rp *plda)
container_of(plda, struct starfive_jh7110_pcie, plda);

starfive_pcie_clk_rst_deinit(pcie);
- if (pcie->power_gpio)
- gpiod_set_value_cansleep(pcie->power_gpio, 0);
+ if (pcie->vpcie3v3)
+ regulator_disable(pcie->vpcie3v3);
starfive_pcie_disable_phy(pcie);
}

@@ -304,8 +306,11 @@ static int starfive_pcie_host_init(struct plda_pcie_rp *plda)
if (ret)
return ret;

- if (pcie->power_gpio)
- gpiod_set_value_cansleep(pcie->power_gpio, 1);
+ if (pcie->vpcie3v3) {
+ ret = regulator_enable(pcie->vpcie3v3);
+ if (ret)
+ dev_err_probe(dev, ret, "failed to enable vpcie3v3 regulator\n");
+ }

if (pcie->reset_gpio)
gpiod_set_value_cansleep(pcie->reset_gpio, 1);
--
2.43.2