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Message-Id: <20200430220619.3169-2-ansuelsmth@gmail.com>
Date: Fri, 1 May 2020 00:06:08 +0200
From: Ansuel Smith <ansuelsmth@...il.com>
To: Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: Ansuel Smith <ansuelsmth@...il.com>,
Sham Muthayyan <smuthayy@...eaurora.org>,
stable@...r.kernel.org, Andy Gross <agross@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Stanimir Varbanov <svarbanov@...sol.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Andrew Murray <amurray@...goodpenguin.co.uk>,
Philipp Zabel <p.zabel@...gutronix.de>,
linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 01/11] PCI: qcom: add missing ipq806x clocks in PCIe driver
Aux and Ref clk are missing in PCIe qcom driver.
Add support in the driver to fix PCIe initialization in ipq806x.
Fixes: 82a823833f4e PCI: qcom: Add Qualcomm PCIe controller driver
Signed-off-by: Sham Muthayyan <smuthayy@...eaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
Cc: stable@...r.kernel.org # v4.5+
---
drivers/pci/controller/dwc/pcie-qcom.c | 44 ++++++++++++++++++++++----
1 file changed, 38 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 5ea527a6bd9f..2a39dfdccfc8 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -88,6 +88,8 @@ struct qcom_pcie_resources_2_1_0 {
struct clk *iface_clk;
struct clk *core_clk;
struct clk *phy_clk;
+ struct clk *aux_clk;
+ struct clk *ref_clk;
struct reset_control *pci_reset;
struct reset_control *axi_reset;
struct reset_control *ahb_reset;
@@ -246,6 +248,14 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
if (IS_ERR(res->phy_clk))
return PTR_ERR(res->phy_clk);
+ res->aux_clk = devm_clk_get_optional(dev, "aux");
+ if (IS_ERR(res->aux_clk))
+ return PTR_ERR(res->aux_clk);
+
+ res->ref_clk = devm_clk_get_optional(dev, "ref");
+ if (IS_ERR(res->ref_clk))
+ return PTR_ERR(res->ref_clk);
+
res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
if (IS_ERR(res->pci_reset))
return PTR_ERR(res->pci_reset);
@@ -278,6 +288,8 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
clk_disable_unprepare(res->iface_clk);
clk_disable_unprepare(res->core_clk);
clk_disable_unprepare(res->phy_clk);
+ clk_disable_unprepare(res->aux_clk);
+ clk_disable_unprepare(res->ref_clk);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}
@@ -307,16 +319,32 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
goto err_assert_ahb;
}
+ ret = clk_prepare_enable(res->core_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable core clock\n");
+ goto err_clk_core;
+ }
+
ret = clk_prepare_enable(res->phy_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable phy clock\n");
goto err_clk_phy;
}
- ret = clk_prepare_enable(res->core_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable core clock\n");
- goto err_clk_core;
+ if (res->aux_clk) {
+ ret = clk_prepare_enable(res->aux_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable aux clock\n");
+ goto err_clk_aux;
+ }
+ }
+
+ if (res->ref_clk) {
+ ret = clk_prepare_enable(res->ref_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable ref clock\n");
+ goto err_clk_ref;
+ }
}
ret = reset_control_deassert(res->ahb_reset);
@@ -372,10 +400,14 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
return 0;
err_deassert_ahb:
- clk_disable_unprepare(res->core_clk);
-err_clk_core:
+ clk_disable_unprepare(res->ref_clk);
+err_clk_ref:
+ clk_disable_unprepare(res->aux_clk);
+err_clk_aux:
clk_disable_unprepare(res->phy_clk);
err_clk_phy:
+ clk_disable_unprepare(res->core_clk);
+err_clk_core:
clk_disable_unprepare(res->iface_clk);
err_assert_ahb:
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
--
2.25.1
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