linux-kernel - [PATCH] PCI: layerscape: Allow to compile as module

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Message-Id: <20260112-v6-19-topic-layerscape-pcie-v1-1-1cd863fce50e@pengutronix.de>
Date: Mon, 12 Jan 2026 20:17:11 +0100
From: Steffen Trumtrar <s.trumtrar@...gutronix.de>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, Minghuan Lian <minghuan.Lian@....com>, 
 Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>, 
 Jingoo Han <jingoohan1@...il.com>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org, 
 imx@...ts.linux.dev, Sascha Hauer <s.hauer@...gutronix.de>, 
 Steffen Trumtrar <s.trumtrar@...gutronix.de>
Subject: [PATCH] PCI: layerscape: Allow to compile as module

From: Sascha Hauer <s.hauer@...gutronix.de>

The layerscape pcie host controller could also be compiled as module.
Add the necessary infrastructure to allow building as module instead of
only as builtin driver.

Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
Signed-off-by: Steffen Trumtrar <s.trumtrar@...gutronix.de>
---
 drivers/pci/controller/dwc/Kconfig          |  2 +-
 drivers/pci/controller/dwc/pci-layerscape.c | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 519b59422b479..abfa4a6e62c25 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -121,7 +121,7 @@ config PCI_IMX6_EP
 	  DesignWare core functions to implement the driver.
 
 config PCI_LAYERSCAPE
-	bool "Freescale Layerscape PCIe controller (host mode)"
+	tristate "Freescale Layerscape PCIe controller (host mode)"
 	depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
 	depends on PCI_MSI
 	select PCIE_DW_HOST
diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c
index a44b5c256d6e2..14d6ac4fc53fd 100644
--- a/drivers/pci/controller/dwc/pci-layerscape.c
+++ b/drivers/pci/controller/dwc/pci-layerscape.c
@@ -13,6 +13,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/iopoll.h>
+#include <linux/module.h>
 #include <linux/of_pci.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
@@ -403,8 +404,16 @@ static const struct dev_pm_ops ls_pcie_pm_ops = {
 	NOIRQ_SYSTEM_SLEEP_PM_OPS(ls_pcie_suspend_noirq, ls_pcie_resume_noirq)
 };
 
+static void ls_pcie_remove(struct platform_device *pdev)
+{
+	struct ls_pcie *pcie = platform_get_drvdata(pdev);
+
+	dw_pcie_host_deinit(&pcie->pci->pp);
+}
+
 static struct platform_driver ls_pcie_driver = {
 	.probe = ls_pcie_probe,
+	.remove = ls_pcie_remove,
 	.driver = {
 		.name = "layerscape-pcie",
 		.of_match_table = ls_pcie_of_match,
@@ -412,4 +421,9 @@ static struct platform_driver ls_pcie_driver = {
 		.pm = &ls_pcie_pm_ops,
 	},
 };
-builtin_platform_driver(ls_pcie_driver);
+module_platform_driver(ls_pcie_driver);
+
+MODULE_AUTHOR("Minghuan Lian <Minghuan.Lian@...escale.com>");
+MODULE_DESCRIPTION("Layerscape PCIe host controller driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(of, ls_pcie_of_match);

---
base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
change-id: 20260112-v6-19-topic-layerscape-pcie-9d10b6542139

Best regards,
-- 
Steffen Trumtrar <s.trumtrar@...gutronix.de>