drivers: pcie: refactor pcie directory to make RC and EP independent

With this refactoring of pcie directory, RC drivers are placed under
host/ directory, EP drivers are placed under endpoint/ directory and
they are completely independent of each other.

Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>

drivers/CMakeLists.txt

@@ -4,6 +4,7 @@ add_definitions(-D__ZEPHYR_SUPERVISOR__)
 
 add_subdirectory(console)
 add_subdirectory(interrupt_controller)
+add_subdirectory(pcie)
 
 add_subdirectory_if_kconfig(adc)
 add_subdirectory_if_kconfig(clock_control)
@@ -21,7 +22,6 @@ add_subdirectory_if_kconfig(ipm)
 add_subdirectory_if_kconfig(led)
 add_subdirectory_if_kconfig(led_strip)
 add_subdirectory_if_kconfig(modem)
-add_subdirectory_if_kconfig(pcie)
 add_subdirectory_if_kconfig(pinmux)
 add_subdirectory_if_kconfig(pwm)
 add_subdirectory_if_kconfig(rtc)

drivers/pcie/CMakeLists.txt

@@ -1,5 +1,2 @@
-zephyr_sources(pcie.c)
-zephyr_sources_ifdef(CONFIG_PCIE_MSI msi.c)
-zephyr_sources_ifdef(CONFIG_PCIE_SHELL shell.c)
-
+add_subdirectory_ifdef(CONFIG_PCIE host)
 add_subdirectory_ifdef(CONFIG_PCIE_ENDPOINT endpoint)

drivers/pcie/Kconfig

@@ -1,30 +1,4 @@
-# PCIe/new PCI configuration options
-
-# Copyright (c) 2019 Intel Corporation
-# SPDX-License-Identifier: Apache-2.0
-
-menuconfig PCIE
-	bool "Enable new PCI/PCIe support"
-	help
-	  This option enables support for new PCI(e) drivers.
-
-if PCIE
-
-config PCIE_MSI
-	bool "Enable support for PCI(e) MSI"
-	help
-	  Use Message-Signaled Interrupts where possible. With this option
-	  enabled, PCI(e) devices which support MSI will be configured (at
-	  runtime) to use them. This is typically required for PCIe devices
-	  to generate interrupts at all.
-
-config PCIE_SHELL
-	bool "Enable PCIe/new PCI Shell"
-	default y
-	depends on SHELL && !PCIE_ENDPOINT
-	help
-	  Enable commands for debugging PCI(e) using the built-in shell.
+# PCIe RC/EP drivers configuration options
 
+source "drivers/pcie/host/Kconfig"
 source "drivers/pcie/endpoint/Kconfig"
-
-endif # PCIE

drivers/pcie/host/CMakeLists.txt

@@ -0,0 +1,3 @@
+zephyr_sources(pcie.c)
+zephyr_sources_ifdef(CONFIG_PCIE_MSI msi.c)
+zephyr_sources_ifdef(CONFIG_PCIE_SHELL shell.c)

drivers/pcie/host/Kconfig

@@ -0,0 +1,28 @@
+# PCIe/new PCI configuration options
+
+# Copyright (c) 2019 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+menuconfig PCIE
+	bool "Enable new PCI/PCIe Root Complex support"
+	help
+	  This option enables support for new PCI(e) drivers.
+
+if PCIE
+
+config PCIE_MSI
+	bool "Enable support for PCI(e) MSI"
+	help
+	  Use Message-Signaled Interrupts where possible. With this option
+	  enabled, PCI(e) devices which support MSI will be configured (at
+	  runtime) to use them. This is typically required for PCIe devices
+	  to generate interrupts at all.
+
+config PCIE_SHELL
+	bool "Enable PCIe/new PCI Shell"
+	default y
+	depends on SHELL
+	help
+	  Enable commands for debugging PCI(e) using the built-in shell.
+
+endif # PCIE