The 'pci-keystone.c' driver is the application/glue/wrapper driver for the
Designware PCIe Controllers on TI SoCs. Now that all of the helper APIs
that the 'pci-keystone.c' driver depends upon have been exported for use,
enable support to build the driver as a loadable module.
Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx>
---
drivers/pci/controller/dwc/Kconfig | 6 ++---
drivers/pci/controller/dwc/pci-keystone.c | 28 ++++++++++++++++++++---
2 files changed, 28 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index deafc512b079..33f3dab7b385 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -458,10 +458,10 @@ config PCI_DRA7XX_EP
This uses the DesignWare core.
config PCI_KEYSTONE
- bool
+ tristate
config PCI_KEYSTONE_HOST
- bool "TI Keystone PCIe controller (host mode)"
+ tristate "TI Keystone PCIe controller (host mode)"
depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
@@ -473,7 +473,7 @@ config PCI_KEYSTONE_HOST
DesignWare core functions to implement the driver.
config PCI_KEYSTONE_EP
- bool "TI Keystone PCIe controller (endpoint mode)"
+ tristate "TI Keystone PCIe controller (endpoint mode)"
depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
depends on PCI_ENDPOINT
select PCIE_DW_EP
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 4ed6eab0a2f0..eabe7e9ed44b 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -17,6 +17,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_irq.h>
@@ -132,6 +133,7 @@ struct keystone_pcie {
struct device_node *msi_intc_np;
struct irq_domain *intx_irq_domain;
struct device_node *np;
+ struct gpio_desc *reset_gpio;
/* Application register space */
void __iomem *va_app_base; /* DT 1st resource */
@@ -862,7 +864,7 @@ static int ks_pcie_fault(unsigned long addr, unsigned int fsr,
}
#endif
-static int __init ks_pcie_init_id(struct keystone_pcie *ks_pcie)
+static int ks_pcie_init_id(struct keystone_pcie *ks_pcie)
{
int ret;
unsigned int id;
@@ -906,7 +908,7 @@ static void ks_pcie_host_deinit(struct dw_pcie_rp *pp)
dw_pcie_free_domains(pp);
}
-static int __init ks_pcie_host_init(struct dw_pcie_rp *pp)
+static int ks_pcie_host_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
@@ -1211,6 +1213,7 @@ static const struct of_device_id ks_pcie_of_match[] = {
},
{ },
};
+MODULE_DEVICE_TABLE(of, ks_pcie_of_match);
static int ks_pcie_probe(struct platform_device *pdev)
{
@@ -1329,6 +1332,7 @@ static int ks_pcie_probe(struct platform_device *pdev)
dev_err(dev, "Failed to get reset GPIO\n");
goto err_link;
}
+ ks_pcie->reset_gpio = gpiod;
/* Obtain references to the PHYs */
for (i = 0; i < num_lanes; i++)
@@ -1440,9 +1444,23 @@ static void ks_pcie_remove(struct platform_device *pdev)
{
struct keystone_pcie *ks_pcie = platform_get_drvdata(pdev);
struct device_link **link = ks_pcie->link;
+ struct dw_pcie *pci = ks_pcie->pci;
int num_lanes = ks_pcie->num_lanes;
+ const struct ks_pcie_of_data *data;
struct device *dev = &pdev->dev;
+ enum dw_pcie_device_mode mode;
+
+ ks_pcie_disable_error_irq(ks_pcie);
+ data = of_device_get_match_data(dev);
+ mode = data->mode;
+ if (mode == DW_PCIE_RC_TYPE) {
+ dw_pcie_host_deinit(&pci->pp);
+ } else {
+ pci_epc_deinit_notify(pci->ep.epc);
+ dw_pcie_ep_deinit(&pci->ep);
+ }
+ gpiod_set_value_cansleep(ks_pcie->reset_gpio, 0);
pm_runtime_put(dev);
pm_runtime_disable(dev);
ks_pcie_disable_phy(ks_pcie);
@@ -1458,4 +1476,8 @@ static struct platform_driver ks_pcie_driver = {
.of_match_table = ks_pcie_of_match,
},
};
-builtin_platform_driver(ks_pcie_driver);
+module_platform_driver(ks_pcie_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PCIe host controller driver for Texas Instruments Keystone SoCs");
+MODULE_AUTHOR("Murali Karicheri <m-karicheri2@xxxxxx>");
--
2.43.0
