Add a comment in mtk_pcie_en7581_power_up() to clarify, unlike the other
MediaTek Gen3 controllers, the Airoha EN7581 requires PHY initialization
and power-on before PHY reset deassert.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
drivers/pci/controller/pcie-mediatek-gen3.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index 2b80edd4462ad4e9f2a5d192db7f99307113eb8a..e4f890a73cb8ada7423301fa7a9acc3e177d0cad 100644
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -928,6 +928,10 @@ static int mtk_pcie_en7581_power_up(struct mtk_gen3_pcie *pcie)
*/
mdelay(PCIE_EN7581_RESET_TIME_MS);
+ /*
+ * Unlike the other MediaTek Gen3 controllers, the Airoha EN7581
+ * requires PHY initialization and power-on before PHY reset deassert.
+ */
err = phy_init(pcie->phy);
if (err) {
dev_err(dev, "failed to initialize PHY\n");
--
2.47.0
