openwrt/target/linux/ipq806x/patches-4.19/0071-2-PCI-qcom-Fixed-IPQ806x-PCIE-reset-changes.patch

From 490d103232287eb51c92c49a4ef8865fd0a9d59e Mon Sep 17 00:00:00 2001
From: Sham Muthayyan <smuthayy@codeaurora.org>
Date: Tue, 19 Jul 2016 18:58:18 +0530
Subject: PCI: qcom: Fixed IPQ806x PCIE reset changes

Change-Id: Ia6590e960b9754b1e8b7a51f318788cd63e9e321
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
---

--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -92,6 +92,7 @@ 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];
 };
 
@@ -261,6 +262,10 @@ static int qcom_pcie_get_resources_2_1_0
 	if (IS_ERR(res->por_reset))
 		return PTR_ERR(res->por_reset);
 
+	res->ext_reset = devm_reset_control_get(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);
 }
@@ -274,6 +279,7 @@ static void qcom_pcie_deinit_2_1_0(struc
 	reset_control_assert(res->ahb_reset);
 	reset_control_assert(res->por_reset);
 	reset_control_assert(res->pci_reset);
+	reset_control_assert(res->ext_reset);
 	clk_disable_unprepare(res->iface_clk);
 	clk_disable_unprepare(res->core_clk);
 	clk_disable_unprepare(res->phy_clk);
@@ -290,15 +296,21 @@ static int qcom_pcie_init_2_1_0(struct q
 	u32 val;
 	int ret;
 
+	ret = reset_control_assert(res->ahb_reset);
+	if (ret) {
+		dev_err(dev, "cannot assert ahb reset\n");
+		return ret;
+	}
+
 	ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
 	if (ret < 0) {
 		dev_err(dev, "cannot enable regulators\n");
 		return ret;
 	}
 
-	ret = reset_control_assert(res->ahb_reset);
+	ret = reset_control_deassert(res->ext_reset);
 	if (ret) {
-		dev_err(dev, "cannot assert ahb reset\n");
+		dev_err(dev, "cannot assert ext reset\n");
 		goto err_assert_ahb;
 	}