diff mbox series

[01/12] pcie: qcom: add missing ipq806x clocks in pcie driver

Message ID 20200320183455.21311-1-ansuelsmth@gmail.com (mailing list archive)
State Changes Requested, archived
Headers show
Series [01/12] pcie: qcom: add missing ipq806x clocks in pcie driver | expand

Commit Message

Christian Marangi March 20, 2020, 6:34 p.m. UTC 
Aux and Ref clk are missing in pcie qcom driver.
Add support in the driver to fix pcie inizialization
in ipq806x

Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 38 ++++++++++++++++++++++----
 1 file changed, 33 insertions(+), 5 deletions(-)

Comments

Bjorn Helgaas March 20, 2020, 6:47 p.m. UTC | #1 
Please add a cover letter with the patches as responses to it.

Make your subjects match in capitalization, verb tense, etc.:

  $ git log --oneline drivers/pci/controller/dwc/pcie-qcom.c
  ed8cc3b1fc84 PCI: qcom: Add support for SDM845 PCIe controller
  64adde31c8e9 PCI: qcom: Ensure that PERST is asserted for at least 100 ms
  67021ae0bbe9 PCI: qcom: Add QCS404 PCIe controller support
  5aa180974e4d PCI: qcom: Use clk bulk API for 2.4.0 controllers
  322f03436692 PCI: qcom: Use default config space read function
  02b485e31d98 PCI: qcom: Don't deassert reset GPIO during probe
  6e5da6f7d824 PCI: qcom: Fix error handling in runtime PM support
  739cd35918b7 PCI: qcom: Drop unnecessary root_bus_nr setting

On Fri, Mar 20, 2020 at 07:34:43PM +0100, Ansuel Smith wrote:
> Aux and Ref clk are missing in pcie qcom driver.
> Add support in the driver to fix pcie inizialization
> in ipq806x

s/pcie/PCIe/ in English text like commit logs and comments.
s/inizialization/initialization/

It'd be useful to have enough context to know what "ipq806x" is.

Add period at end of sentence.
Stanimir Varbanov April 1, 2020, 1:01 p.m. UTC | #2 
Hi Ansuel,

As Bjorn already mentioned please make cover-letter in next version of
the patchset so that we know what is the purpose of the patches.

I've the impression that you want to use pcie-qcom platform driver as an
endpoint, am I wrong?

I'll review the patches these days.

On 3/20/20 8:34 PM, Ansuel Smith wrote:
> Aux and Ref clk are missing in pcie qcom driver.
> Add support in the driver to fix pcie inizialization
> in ipq806x
> 
> Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
> Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 38 ++++++++++++++++++++++----
>  1 file changed, 33 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 5ea527a6bd9f..f958c535de6e 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(dev, "aux");
+	if (IS_ERR(res->aux_clk))
+		return PTR_ERR(res->aux_clk);
+
+	res->ref_clk = devm_clk_get(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 +319,28 @@  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);
+	ret = clk_prepare_enable(res->aux_clk);
 	if (ret) {
-		dev_err(dev, "cannot prepare/enable core clock\n");
-		goto err_clk_core;
+		dev_err(dev, "cannot prepare/enable aux clock\n");
+		goto err_clk_aux;
+	}
+
+	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 +396,14 @@  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);