PCIe designware MSI driver (pcie-designware-msi.c) shall be used without
enabling pcie-designware core drivers (e.g. usage with ECAM driver). Hence
add Kconfig option to enable pcie-designware-msi driver as separate module.
Signed-off-by: Mayank Rana <quic_mrana@xxxxxxxxxxx>
---
drivers/pci/controller/dwc/Kconfig | 8 ++++++++
drivers/pci/controller/dwc/Makefile | 3 ++-
drivers/pci/controller/dwc/pcie-designware-msi.h | 14 ++++++++++++++
3 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 8afacc9..a4c8920 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -6,8 +6,16 @@ menu "DesignWare-based PCIe controllers"
config PCIE_DW
bool
+config PCIE_DW_MSI
+ bool "DWC PCIe based MSI controller"
+ depends on PCI_MSI
+ help
+ Say Y here to enable DWC PCIe based MSI controller to support
+ MSI functionality.
+
config PCIE_DW_HOST
bool
+ select PCIE_DW_MSI
select PCIE_DW
config PCIE_DW_EP
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index 2ecc603..9e8e4515 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PCIE_DW) += pcie-designware.o
-obj-$(CONFIG_PCIE_DW_HOST) += pcie-designware-host.o pcie-designware-msi.o
+obj-$(CONFIG_PCIE_DW_MSI) += pcie-designware-msi.o
+obj-$(CONFIG_PCIE_DW_HOST) += pcie-designware-host.o
obj-$(CONFIG_PCIE_DW_EP) += pcie-designware-ep.o
obj-$(CONFIG_PCIE_DW_PLAT) += pcie-designware-plat.o
obj-$(CONFIG_PCIE_BT1) += pcie-bt1.o
diff --git a/drivers/pci/controller/dwc/pcie-designware-msi.h b/drivers/pci/controller/dwc/pcie-designware-msi.h
index cf5c612..2872775f 100644
--- a/drivers/pci/controller/dwc/pcie-designware-msi.h
+++ b/drivers/pci/controller/dwc/pcie-designware-msi.h
@@ -40,10 +40,24 @@ struct dw_msi {
void *private_data;
};
+#if IS_ENABLED(CONFIG_PCIE_DW_MSI)
struct dw_msi *dw_pcie_msi_host_init(struct platform_device *pdev,
struct dw_msi_ops *ops, u32 num_vectors);
int dw_pcie_allocate_domains(struct dw_msi *msi);
void dw_pcie_msi_init(struct dw_msi *msi);
void dw_pcie_free_msi(struct dw_msi *msi);
irqreturn_t dw_handle_msi_irq(struct dw_msi *msi);
+#else
+static inline struct dw_msi *dw_pcie_msi_host_init(struct platform_device *pdev,
+ struct dw_msi_ops *ops, u32 num_vectors)
+{ return ERR_PTR(-ENODEV); }
+static inline int dw_pcie_allocate_domains(struct dw_msi *msi)
+{ return -ENODEV; }
+static inline void dw_pcie_msi_init(struct dw_msi *msi)
+{ }
+static inline void dw_pcie_free_msi(struct dw_msi *msi)
+{ }
+static inline irqreturn_t dw_handle_msi_irq(struct dw_msi *msi)
+{ return IRQ_NONE; }
+#endif
#endif /* _PCIE_DESIGNWARE_MSI_H */
--
2.7.4
