bus: mhi: Move host MHI code to "host" directory

In preparation of the endpoint MHI support, let's move the host MHI code
to its own "host" directory and adjust the toplevel MHI Kconfig & Makefile.

While at it, let's also move the "pci_generic" driver to "host" directory
as it is a host MHI controller driver.

Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20220301160308.107452-5-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

12 files changed, 39 insertions, 33 deletions

diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
index 52c2f35a26a9..16da51130d1a 100644
--- a/drivers/bus/Makefile
+++ b/drivers/bus/Makefile
@@ -39,4 +39,4 @@ obj-$(CONFIG_VEXPRESS_CONFIG)	+= vexpress-config.o
 obj-$(CONFIG_DA8XX_MSTPRI)	+= da8xx-mstpri.o
 
 # MHI
-obj-$(CONFIG_MHI_BUS)		+= mhi/
+obj-y				+= mhi/
diff --git a/drivers/bus/mhi/Kconfig b/drivers/bus/mhi/Kconfig
index da5cd0c9fc62..4748df7f9cd5 100644
--- a/drivers/bus/mhi/Kconfig
+++ b/drivers/bus/mhi/Kconfig
@@ -2,30 +2,7 @@
 #
 # MHI bus
 #
-# Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+# Copyright (c) 2021, Linaro Ltd.
 #
 
-config MHI_BUS
-	tristate "Modem Host Interface (MHI) bus"
-	help
-	  Bus driver for MHI protocol. Modem Host Interface (MHI) is a
-	  communication protocol used by the host processors to control
-	  and communicate with modem devices over a high speed peripheral
-	  bus or shared memory.
-
-config MHI_BUS_DEBUG
-	bool "Debugfs support for the MHI bus"
-	depends on MHI_BUS && DEBUG_FS
-	help
-	  Enable debugfs support for use with the MHI transport. Allows
-	  reading and/or modifying some values within the MHI controller
-	  for debug and test purposes.
-
-config MHI_BUS_PCI_GENERIC
-	tristate "MHI PCI controller driver"
-	depends on MHI_BUS
-	depends on PCI
-	help
-	  This driver provides MHI PCI controller driver for devices such as
-	  Qualcomm SDX55 based PCIe modems.
-
+source "drivers/bus/mhi/host/Kconfig"
diff --git a/drivers/bus/mhi/Makefile b/drivers/bus/mhi/Makefile
index 0a2d778d6fb4..5f5708a249f5 100644
--- a/drivers/bus/mhi/Makefile
+++ b/drivers/bus/mhi/Makefile
@@ -1,6 +1,2 @@
-# core layer
-obj-y += core/
-
-obj-$(CONFIG_MHI_BUS_PCI_GENERIC) += mhi_pci_generic.o
-mhi_pci_generic-y += pci_generic.o
-
+# Host MHI stack
+obj-y += host/
diff --git a/drivers/bus/mhi/host/Kconfig b/drivers/bus/mhi/host/Kconfig
new file mode 100644
index 000000000000..da5cd0c9fc62
--- /dev/null
+++ b/drivers/bus/mhi/host/Kconfig
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# MHI bus
+#
+# Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+#
+
+config MHI_BUS
+	tristate "Modem Host Interface (MHI) bus"
+	help
+	  Bus driver for MHI protocol. Modem Host Interface (MHI) is a
+	  communication protocol used by the host processors to control
+	  and communicate with modem devices over a high speed peripheral
+	  bus or shared memory.
+
+config MHI_BUS_DEBUG
+	bool "Debugfs support for the MHI bus"
+	depends on MHI_BUS && DEBUG_FS
+	help
+	  Enable debugfs support for use with the MHI transport. Allows
+	  reading and/or modifying some values within the MHI controller
+	  for debug and test purposes.
+
+config MHI_BUS_PCI_GENERIC
+	tristate "MHI PCI controller driver"
+	depends on MHI_BUS
+	depends on PCI
+	help
+	  This driver provides MHI PCI controller driver for devices such as
+	  Qualcomm SDX55 based PCIe modems.
+
diff --git a/drivers/bus/mhi/core/Makefile b/drivers/bus/mhi/host/Makefile
index c3feb4130aa3..859c2f38451c 100644
--- a/drivers/bus/mhi/core/Makefile
+++ b/drivers/bus/mhi/host/Makefile
@@ -1,4 +1,6 @@
 obj-$(CONFIG_MHI_BUS) += mhi.o
-
 mhi-y := init.o main.o pm.o boot.o
 mhi-$(CONFIG_MHI_BUS_DEBUG) += debugfs.o
+
+obj-$(CONFIG_MHI_BUS_PCI_GENERIC) += mhi_pci_generic.o
+mhi_pci_generic-y += pci_generic.o
diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/host/boot.c
index 74295d3cc662..74295d3cc662 100644
--- a/drivers/bus/mhi/core/boot.c
+++ b/drivers/bus/mhi/host/boot.c
diff --git a/drivers/bus/mhi/core/debugfs.c b/drivers/bus/mhi/host/debugfs.c
index d818586c229d..d818586c229d 100644
--- a/drivers/bus/mhi/core/debugfs.c
+++ b/drivers/bus/mhi/host/debugfs.c
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/host/init.c
index d8787aaa176b..d8787aaa176b 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/host/init.c
diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/host/internal.h
index 37c39bf1c7a9..37c39bf1c7a9 100644
--- a/drivers/bus/mhi/core/internal.h
+++ b/drivers/bus/mhi/host/internal.h
diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/host/main.c
index 85f4f7c8d7c6..85f4f7c8d7c6 100644
--- a/drivers/bus/mhi/core/main.c
+++ b/drivers/bus/mhi/host/main.c
diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index 9527b7d63840..9527b7d63840 100644
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/host/pm.c
index c35c5ddc7220..c35c5ddc7220 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/host/pm.c