diff mbox series

[v3,4/4] PCI: j721e: Add support to provide refclk to PCIe connector

Message ID 20210222114030.26445-5-kishon@ti.com
State Accepted
Commit 49e0efdce791256fef94c3940aea77a0a6b0622e
Headers show
Series AM64: Add PCIe bindings and driver support | expand

Commit Message

Kishon Vijay Abraham I Feb. 22, 2021, 11:40 a.m. UTC 
Add support to provide refclk to PCIe connector.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

---
 drivers/pci/controller/cadence/pci-j721e.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

-- 
2.17.1

Comments

Dan Carpenter Feb. 23, 2021, 7:50 a.m. UTC | #1 
Hi Kishon,

url:    https://github.com/0day-ci/linux/commits/Kishon-Vijay-Abraham-I/AM64-Add-PCIe-bindings-and-driver-support/20210222-194422
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: i386-randconfig-m021-20210222 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

smatch warnings:
drivers/pci/controller/cadence/pci-j721e.c:420 j721e_pcie_probe() warn: missing error code 'ret'

vim +/ret +420 drivers/pci/controller/cadence/pci-j721e.c

f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  305  static int j721e_pcie_probe(struct platform_device *pdev)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  306  {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  307  	struct device *dev = &pdev->dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  308  	struct device_node *node = dev->of_node;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  309  	struct pci_host_bridge *bridge;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  310  	struct j721e_pcie_data *data;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  311  	struct cdns_pcie *cdns_pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  312  	struct j721e_pcie *pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  313  	struct cdns_pcie_rc *rc;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  314  	struct cdns_pcie_ep *ep;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  315  	struct gpio_desc *gpiod;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  316  	void __iomem *base;
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  317  	struct clk *clk;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  318  	u32 num_lanes;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  319  	u32 mode;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  320  	int ret;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  321  	int irq;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  322  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  323  	data = (struct j721e_pcie_data *)of_device_get_match_data(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  324  	if (!data)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  325  		return -EINVAL;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  326  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  327  	mode = (u32)data->mode;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  328  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  329  	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  330  	if (!pcie)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  331  		return -ENOMEM;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  332  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  333  	pcie->dev = dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  334  	pcie->mode = mode;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  335  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  336  	base = devm_platform_ioremap_resource_byname(pdev, "intd_cfg");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  337  	if (IS_ERR(base))
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  338  		return PTR_ERR(base);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  339  	pcie->intd_cfg_base = base;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  340  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  341  	base = devm_platform_ioremap_resource_byname(pdev, "user_cfg");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  342  	if (IS_ERR(base))
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  343  		return PTR_ERR(base);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  344  	pcie->user_cfg_base = base;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  345  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  346  	ret = of_property_read_u32(node, "num-lanes", &num_lanes);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  347  	if (ret || num_lanes > MAX_LANES)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  348  		num_lanes = 1;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  349  	pcie->num_lanes = num_lanes;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  350  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  351  	if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)))
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  352  		return -EINVAL;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  353  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  354  	irq = platform_get_irq_byname(pdev, "link_state");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  355  	if (irq < 0)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  356  		return irq;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  357  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  358  	dev_set_drvdata(dev, pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  359  	pm_runtime_enable(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  360  	ret = pm_runtime_get_sync(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  361  	if (ret < 0) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  362  		dev_err(dev, "pm_runtime_get_sync failed\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  363  		goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  364  	}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  365  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  366  	ret = j721e_pcie_ctrl_init(pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  367  	if (ret < 0) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  368  		dev_err(dev, "pm_runtime_get_sync failed\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  369  		goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  370  	}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  371  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  372  	ret = devm_request_irq(dev, irq, j721e_pcie_link_irq_handler, 0,
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  373  			       "j721e-pcie-link-down-irq", pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  374  	if (ret < 0) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  375  		dev_err(dev, "failed to request link state IRQ %d\n", irq);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  376  		goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  377  	}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  378  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  379  	j721e_pcie_config_link_irq(pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  380  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  381  	switch (mode) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  382  	case PCI_MODE_RC:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  383  		if (!IS_ENABLED(CONFIG_PCIE_CADENCE_HOST)) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  384  			ret = -ENODEV;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  385  			goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  386  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  387  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  388  		bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rc));
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  389  		if (!bridge) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  390  			ret = -ENOMEM;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  391  			goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  392  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  393  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  394  		bridge->ops = &cdns_ti_pcie_host_ops;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  395  		rc = pci_host_bridge_priv(bridge);
4740b969aaf58a Nadeem Athani          2021-02-09  396  		rc->quirk_retrain_flag = data->quirk_retrain_flag;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  397  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  398  		cdns_pcie = &rc->pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  399  		cdns_pcie->dev = dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  400  		cdns_pcie->ops = &j721e_pcie_ops;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  401  		pcie->cdns_pcie = cdns_pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  402  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  403  		gpiod = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  404  		if (IS_ERR(gpiod)) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  405  			ret = PTR_ERR(gpiod);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  406  			if (ret != -EPROBE_DEFER)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  407  				dev_err(dev, "Failed to get reset GPIO\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  408  			goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  409  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  410  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  411  		ret = cdns_pcie_init_phy(dev, cdns_pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  412  		if (ret) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  413  			dev_err(dev, "Failed to init phy\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  414  			goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  415  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  416  
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  417  		clk = devm_clk_get_optional(dev, "pcie_refclk");
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  418  		if (IS_ERR(clk)) {
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  419  			dev_err(dev, "failed to get pcie_refclk\n");
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22 @420  			goto err_pcie_setup;

ret = PTR_ERR(clk)

c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  421  		}
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  422  
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  423  		ret = clk_prepare_enable(clk);
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  424  		if (ret) {
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  425  			dev_err(dev, "failed to enable pcie_refclk\n");
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  426  			goto err_get_sync;
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  427  		}
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  428  		pcie->refclk = clk;
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  429  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  430  		/*
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  431  		 * "Power Sequencing and Reset Signal Timings" table in
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  432  		 * PCI EXPRESS CARD ELECTROMECHANICAL SPECIFICATION, REV. 3.0
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  433  		 * indicates PERST# should be deasserted after minimum of 100us
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  434  		 * once REFCLK is stable. The REFCLK to the connector in RC
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  435  		 * mode is selected while enabling the PHY. So deassert PERST#
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  436  		 * after 100 us.
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  437  		 */
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  438  		if (gpiod) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  439  			usleep_range(100, 200);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  440  			gpiod_set_value_cansleep(gpiod, 1);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  441  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  442  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  443  		ret = cdns_pcie_host_setup(rc);
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  444  		if (ret < 0) {
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  445  			clk_disable_unprepare(pcie->refclk);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  446  			goto err_pcie_setup;
c77817a9fba361 Kishon Vijay Abraham I 2021-02-22  447  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  448  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  449  		break;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  450  	case PCI_MODE_EP:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  451  		if (!IS_ENABLED(CONFIG_PCIE_CADENCE_EP)) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  452  			ret = -ENODEV;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  453  			goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  454  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  455  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  456  		ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  457  		if (!ep) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  458  			ret = -ENOMEM;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  459  			goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  460  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  461  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  462  		cdns_pcie = &ep->pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  463  		cdns_pcie->dev = dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  464  		cdns_pcie->ops = &j721e_pcie_ops;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  465  		pcie->cdns_pcie = cdns_pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  466  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  467  		ret = cdns_pcie_init_phy(dev, cdns_pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  468  		if (ret) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  469  			dev_err(dev, "Failed to init phy\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  470  			goto err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  471  		}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  472  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  473  		ret = cdns_pcie_ep_setup(ep);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  474  		if (ret < 0)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  475  			goto err_pcie_setup;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  476  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  477  		break;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  478  	default:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  479  		dev_err(dev, "INVALID device type %d\n", mode);

Should this be an error path as well?

f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  480  	}
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  481  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  482  	return 0;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  483  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  484  err_pcie_setup:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  485  	cdns_pcie_disable_phy(cdns_pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  486  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  487  err_get_sync:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  488  	pm_runtime_put(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  489  	pm_runtime_disable(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  490  
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  491  	return ret;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22  492  }

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff mbox series

Patch

diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index dac1ac8a7615..f99af98ab7d1 100644
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c
@@ -6,6 +6,7 @@ 
  * Author: Kishon Vijay Abraham I <kishon@ti.com>
  */
 
+#include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/io.h>
@@ -50,6 +51,7 @@  enum link_status {
 
 struct j721e_pcie {
 	struct device		*dev;
+	struct clk		*refclk;
 	u32			mode;
 	u32			num_lanes;
 	struct cdns_pcie	*cdns_pcie;
@@ -310,6 +312,7 @@  static int j721e_pcie_probe(struct platform_device *pdev)
 	struct cdns_pcie_ep *ep;
 	struct gpio_desc *gpiod;
 	void __iomem *base;
+	struct clk *clk;
 	u32 num_lanes;
 	u32 mode;
 	int ret;
@@ -408,6 +411,19 @@  static int j721e_pcie_probe(struct platform_device *pdev)
 			goto err_get_sync;
 		}
 
+		clk = devm_clk_get_optional(dev, "pcie_refclk");
+		if (IS_ERR(clk)) {
+			dev_err(dev, "failed to get pcie_refclk\n");
+			goto err_pcie_setup;
+		}
+
+		ret = clk_prepare_enable(clk);
+		if (ret) {
+			dev_err(dev, "failed to enable pcie_refclk\n");
+			goto err_get_sync;
+		}
+		pcie->refclk = clk;
+
 		/*
 		 * "Power Sequencing and Reset Signal Timings" table in
 		 * PCI EXPRESS CARD ELECTROMECHANICAL SPECIFICATION, REV. 3.0
@@ -422,8 +438,10 @@  static int j721e_pcie_probe(struct platform_device *pdev)
 		}
 
 		ret = cdns_pcie_host_setup(rc);
-		if (ret < 0)
+		if (ret < 0) {
+			clk_disable_unprepare(pcie->refclk);
 			goto err_pcie_setup;
+		}
 
 		break;
 	case PCI_MODE_EP:
@@ -476,6 +494,7 @@  static int j721e_pcie_remove(struct platform_device *pdev)
 	struct cdns_pcie *cdns_pcie = pcie->cdns_pcie;
 	struct device *dev = &pdev->dev;
 
+	clk_disable_unprepare(pcie->refclk);
 	cdns_pcie_disable_phy(cdns_pcie);
 	pm_runtime_put(dev);
 	pm_runtime_disable(dev);