@@ -35,6 +35,7 @@ struct imx6_pcie {
int power_on_gpio;
int wake_up_gpio;
int disable_gpio;
+ struct clk *lvds_sel;
struct clk *lvds_gate;
struct clk *sata_ref_100m;
struct clk *pcie_ref_125m;
@@ -255,6 +256,12 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp)
goto err_pcie_ref;
}
+ ret = clk_prepare_enable(imx6_pcie->lvds_sel);
+ if (ret) {
+ dev_err(pp->dev, "unable to enable lvds_sel\n");
+ goto err_lvds_sel;
+ }
+
ret = clk_prepare_enable(imx6_pcie->lvds_gate);
if (ret) {
dev_err(pp->dev, "unable to enable lvds_gate\n");
@@ -273,8 +280,10 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp)
return 0;
err_pcie_axi:
- clk_disable_unprepare(imx6_pcie->lvds_gate);
+ clk_disable_unprepare(imx6_pcie->lvds_sel);
err_lvds_gate:
+ clk_disable_unprepare(imx6_pcie->lvds_gate);
+err_lvds_sel:
clk_disable_unprepare(imx6_pcie->pcie_ref_125m);
err_pcie_ref:
clk_disable_unprepare(imx6_pcie->sata_ref_100m);
@@ -497,6 +506,14 @@ static int __init imx6_pcie_probe(struct platform_device *pdev)
}
/* Fetch clocks */
+ imx6_pcie->lvds_sel = devm_clk_get(&pdev->dev, "lvds_sel");
+ if (IS_ERR(imx6_pcie->lvds_sel)) {
+ dev_err(&pdev->dev,
+ "lvds_sel clock select missing or invalid\n");
+ ret = PTR_ERR(imx6_pcie->lvds_sel);
+ goto err;
+ }
+
imx6_pcie->lvds_gate = devm_clk_get(&pdev->dev, "lvds_gate");
if (IS_ERR(imx6_pcie->lvds_gate)) {
dev_err(&pdev->dev,
The PCIe needs lvds_gate for successful operation, so make the PCIe driver enable (set as output) the lvds_gate . Signed-off-by: Marek Vasut <marex@denx.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Frank Li <lznuaa@gmail.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Mohit KUMAR <Mohit.KUMAR@st.com> Cc: Pratyush Anand <pratyush.anand@st.com> Cc: Richard Zhu <r65037@freescale.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Sean Cross <xobs@kosagi.com> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Siva Reddy Kallam <siva.kallam@samsung.com> Cc: Srikanth T Shivanand <ts.srikanth@samsung.com> Cc: Tim Harvey <tharvey@gateworks.com> Cc: Troy Kisky <troy.kisky@boundarydevices.com> Cc: Yinghai Lu <yinghai@kernel.org> --- drivers/pci/host/pci-imx6.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)