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

   1 From 490d103232287eb51c92c49a4ef8865fd0a9d59e Mon Sep 17 00:00:00 2001
   2 From: Sham Muthayyan <smuthayy@codeaurora.org>
   3 Date: Tue, 19 Jul 2016 18:58:18 +0530
   4 Subject: PCI: qcom: Fixed IPQ806x PCIE reset changes
   5
   6 Change-Id: Ia6590e960b9754b1e8b7a51f318788cd63e9e321
   7 Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
   8 ---
   9
  10 --- a/drivers/pci/controller/dwc/pcie-qcom.c
  11 +++ b/drivers/pci/controller/dwc/pcie-qcom.c
  12 @@ -92,6 +92,7 @@ struct qcom_pcie_resources_2_1_0 {
  13         struct reset_control *ahb_reset;
  14         struct reset_control *por_reset;
  15         struct reset_control *phy_reset;
  16 +       struct reset_control *ext_reset;
  17         struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
  18  };
  19
  20 @@ -261,6 +262,10 @@ static int qcom_pcie_get_resources_2_1_0
  21         if (IS_ERR(res->por_reset))
  22                 return PTR_ERR(res->por_reset);
  23
  24 +       res->ext_reset = devm_reset_control_get(dev, "ext");
  25 +       if (IS_ERR(res->ext_reset))
  26 +               return PTR_ERR(res->ext_reset);
  27 +
  28         res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
  29         return PTR_ERR_OR_ZERO(res->phy_reset);
  30  }
  31 @@ -274,6 +279,7 @@ static void qcom_pcie_deinit_2_1_0(struc
  32         reset_control_assert(res->ahb_reset);
  33         reset_control_assert(res->por_reset);
  34         reset_control_assert(res->pci_reset);
  35 +       reset_control_assert(res->ext_reset);
  36         clk_disable_unprepare(res->iface_clk);
  37         clk_disable_unprepare(res->core_clk);
  38         clk_disable_unprepare(res->phy_clk);
  39 @@ -290,15 +296,21 @@ static int qcom_pcie_init_2_1_0(struct q
  40         u32 val;
  41         int ret;
  42
  43 +       ret = reset_control_assert(res->ahb_reset);
  44 +       if (ret) {
  45 +               dev_err(dev, "cannot assert ahb reset\n");
  46 +               return ret;
  47 +       }
  48 +
  49         ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
  50         if (ret < 0) {
  51                 dev_err(dev, "cannot enable regulators\n");
  52                 return ret;
  53         }
  54
  55 -       ret = reset_control_assert(res->ahb_reset);
  56 +       ret = reset_control_deassert(res->ext_reset);
  57         if (ret) {
  58 -               dev_err(dev, "cannot assert ahb reset\n");
  59 +               dev_err(dev, "cannot assert ext reset\n");
  60                 goto err_assert_ahb;
  61         }
  62