From: Ansuel Smith ansuelsmth@gmail.com
[ Upstream commit ee367e2cdd2202b5714982739e684543cd2cee0e ]
Add missing ext reset used by ipq8064 SoC in PCIe qcom driver.
Link: https://lore.kernel.org/r/20200615210608.21469-5-ansuelsmth@gmail.com Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver") Signed-off-by: Sham Muthayyan smuthayy@codeaurora.org Signed-off-by: Ansuel Smith ansuelsmth@gmail.com Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Reviewed-by: Rob Herring robh@kernel.org Reviewed-by: Philipp Zabel p.zabel@pengutronix.de Acked-by: Stanimir Varbanov svarbanov@mm-sol.com Cc: stable@vger.kernel.org # v4.5+ Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/dwc/pcie-qcom.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 9cf7599a198c4..374db5d59cf87 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -110,6 +110,7 @@ struct qcom_pcie_resources_2_1_0 { struct reset_control *ahb_reset; struct reset_control *por_reset; struct reset_control *phy_reset; + struct reset_control *ext_reset; struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY]; };
@@ -279,6 +280,10 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie) if (IS_ERR(res->por_reset)) return PTR_ERR(res->por_reset);
+ res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext"); + if (IS_ERR(res->ext_reset)) + return PTR_ERR(res->ext_reset); + res->phy_reset = devm_reset_control_get_exclusive(dev, "phy"); return PTR_ERR_OR_ZERO(res->phy_reset); } @@ -292,6 +297,7 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie) reset_control_assert(res->axi_reset); reset_control_assert(res->ahb_reset); reset_control_assert(res->por_reset); + reset_control_assert(res->ext_reset); reset_control_assert(res->phy_reset); clk_disable_unprepare(res->iface_clk); clk_disable_unprepare(res->core_clk); @@ -351,6 +357,12 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) goto err_deassert_ahb; }
+ ret = reset_control_deassert(res->ext_reset); + if (ret) { + dev_err(dev, "cannot deassert ext reset\n"); + goto err_deassert_ahb; + } + /* enable PCIe clocks and resets */ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL); val &= ~BIT(0);