linux-kernel - [PATCH] PCI: imx6: Don't request "pci

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Date:   Fri,  1 Mar 2019 00:55:59 -0800
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Trent Piepho <tpiepho@...inj.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>, linux-imx@....com,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: [PATCH] PCI: imx6: Don't request "pci_aux" clock on i.MX7

The clock in question is not present on i.MX7, so move the code
requesting it into i.MX8MQ-only path.

Fixes: eeb61c4e8530 ("PCI: imx6: Add code to request/control
"pcie_aux" clock for i.MX8MQ")
Reported-by: Trent Piepho <tpiepho@...inj.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Trent Piepho <tpiepho@...inj.com>
Cc: linux-imx@....com
Cc: linux-kernel@...r.kernel.org
Cc: linux-pci@...r.kernel.org
---
 drivers/pci/controller/dwc/pci-imx6.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 08f1ee050c73..5fe364a9959d 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1100,8 +1100,14 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 			return PTR_ERR(imx6_pcie->pcie_inbound_axi);
 		}
 		break;
-	case IMX7D:
 	case IMX8MQ:
+		imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
+		if (IS_ERR(imx6_pcie->pcie_aux)) {
+			dev_err(dev, "pcie_aux clock source missing or invalid\n");
+			return PTR_ERR(imx6_pcie->pcie_aux);
+		}
+		/* fall through */
+	case IMX7D:
 		if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
 			imx6_pcie->controller_id = 1;
 
@@ -1118,12 +1124,6 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 			dev_err(dev, "Failed to get PCIE APPS reset control\n");
 			return PTR_ERR(imx6_pcie->apps_reset);
 		}
-
-		imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
-		if (IS_ERR(imx6_pcie->pcie_aux)) {
-			dev_err(dev, "pcie_aux clock source missing or invalid\n");
-			return PTR_ERR(imx6_pcie->pcie_aux);
-		}
 		break;
 	default:
 		break;
-- 
2.20.1