From: Chen-Yu Tsai <wens@xxxxxxxx>
The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is
an optional property. And indeed there are boards that don't require it.
Make the driver follow the binding by using devm_gpiod_get_optional()
instead of devm_gpiod_get().
Fixes: e77f847df54c ("PCI: rockchip: Add Rockchip PCIe controller support")
Fixes: 956cd99b35a8 ("PCI: rockchip: Separate common code from RC driver")
Fixes: 964bac9455be ("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT")
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
Changes since v3:
- Directly return dev_err_probe() instead of having a separate return
statement
Changes since v2:
- Fix error message for failed GPIO
Changes since v1:
- Rewrite subject to match existing convention and reference
'ep-gpios' DT property instead of the 'ep_gpio' field
---
drivers/pci/controller/pcie-rockchip.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
index 904dec0d3a88..a2ad0b7614a4 100644
--- a/drivers/pci/controller/pcie-rockchip.c
+++ b/drivers/pci/controller/pcie-rockchip.c
@@ -118,11 +118,10 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
}
if (rockchip->is_rc) {
- rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
- if (IS_ERR(rockchip->ep_gpio)) {
- dev_err(dev, "missing ep-gpios property in node\n");
- return PTR_ERR(rockchip->ep_gpio);
- }
+ rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep", GPIOD_OUT_HIGH);
+ if (IS_ERR(rockchip->ep_gpio))
+ return dev_err_probe(dev, PTR_ERR(rockchip->ep_gpio),
+ "failed to get ep GPIO\n");
}
rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
--
2.29.2
