linux-kernel - [PATCH v4 02/11] PCI: imx6: Drop imx6_pcie_wait_for

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Date:   Sun, 14 Apr 2019 17:46:23 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-pci@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Chris Healy <cphealy@...il.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v4 02/11] PCI: imx6: Drop imx6_pcie_wait_for_link()

All calls to imx6_pcie_wait_for_link() share the same error path and
the state of PHY debug registers will already be printed there, so
there's no real reason we can't just use dw_pcie_wait_for_link(). Drop
imx6_pcie_wait_for_link() and replace it with dw_pcie_wait_for_link().

Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Suggested-by: Lucas Stach <l.stach@...gutronix.de>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: linux-kernel@...r.kernel.org
Cc: linux-pci@...r.kernel.org
---
 drivers/pci/controller/dwc/pci-imx6.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index ea2617712a3b..bb3dcfdbf697 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -723,21 +723,6 @@ static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie)
 	return 0;
 }
 
-static int imx6_pcie_wait_for_link(struct imx6_pcie *imx6_pcie)
-{
-	struct dw_pcie *pci = imx6_pcie->pci;
-	struct device *dev = pci->dev;
-
-	/* check if the link is up or not */
-	if (!dw_pcie_wait_for_link(pci))
-		return 0;
-
-	dev_dbg(dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
-		dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R0),
-		dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1));
-	return -ETIMEDOUT;
-}
-
 static int imx6_pcie_wait_for_speed_change(struct imx6_pcie *imx6_pcie)
 {
 	struct dw_pcie *pci = imx6_pcie->pci;
@@ -796,7 +781,7 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
 	/* Start LTSSM. */
 	imx6_pcie_ltssm_enable(dev);
 
-	ret = imx6_pcie_wait_for_link(imx6_pcie);
+	ret = dw_pcie_wait_for_link(pci);
 	if (ret)
 		goto err_reset_phy;
 
@@ -834,7 +819,7 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
 		}
 
 		/* Make sure link training is finished as well! */
-		ret = imx6_pcie_wait_for_link(imx6_pcie);
+		ret = dw_pcie_wait_for_link(pci);
 		if (ret) {
 			dev_err(dev, "Failed to bring link up!\n");
 			goto err_reset_phy;
-- 
2.20.1