[PATCH 10/10] soc: fujitsu: hwb: Add Kconfig/Makefile to build fujitsu_hwb driver

[Misono Tomohiro]

This adds kconfig/Makefile to build fujitsu hardware barrier driver
(fujitsu_hwb.ko when built as module).

Note that this is the first time to add A64FX specific driver,
this also adds A64FX entry in Kconfig.platforms of arm64 Kconfig.
Also add MAINTAINERS entry for ARM/A64FX accordingly.

Signed-off-by: Misono Tomohiro <misono.tomohiro at jp.fujitsu.com>
---
 MAINTAINERS                  |  7 +++++++
 arch/arm64/Kconfig.platforms |  5 +++++
 drivers/soc/Kconfig          |  1 +
 drivers/soc/Makefile         |  1 +
 drivers/soc/fujitsu/Kconfig  | 24 ++++++++++++++++++++++++
 drivers/soc/fujitsu/Makefile |  2 ++
 6 files changed, 40 insertions(+)
 create mode 100644 drivers/soc/fujitsu/Kconfig
 create mode 100644 drivers/soc/fujitsu/Makefile

diff --git a/MAINTAINERS b/MAINTAINERS
index 6eff4f720c72..d57ec44ceaed 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1508,6 +1508,13 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git
 F:	arch/arm/mach-*/
 F:	arch/arm/plat-*/
 
+ARM/A64FX SOC SUPPORT
+M:	Tomohiro Misono <misono.tomohiro at jp.fujitsu.com>
+L:	linux-arm-kernel at lists.infradead.org (moderated for non-subscribers)
+S:	Maintained
+F:	drivers/soc/fujitsu/
+F:	include/uapi/linux/fujitsu_hpc_ioctl.h
+
 ARM/ACTIONS SEMI ARCHITECTURE
 M:	Andreas Färber <afaerber at suse.de>
 M:	Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index 6eecdef538bd..41fb214adaff 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -1,6 +1,11 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menu "Platform selection"
 
+config ARCH_A64FX
+	bool "Fujitsu A64FX Platforms"
+	help
+	  This enables support for Fujitsu A64FX SoC family.
+
 config ARCH_ACTIONS
 	bool "Actions Semi Platforms"
 	select OWL_TIMER
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index d097d070f579..7a52b5dc4c96 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -7,6 +7,7 @@ source "drivers/soc/aspeed/Kconfig"
 source "drivers/soc/atmel/Kconfig"
 source "drivers/soc/bcm/Kconfig"
 source "drivers/soc/fsl/Kconfig"
+source "drivers/soc/fujitsu/Kconfig"
 source "drivers/soc/imx/Kconfig"
 source "drivers/soc/ixp4xx/Kconfig"
 source "drivers/soc/litex/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 699b758d28e4..57c0dddc4d23 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -10,6 +10,7 @@ obj-y				+= bcm/
 obj-$(CONFIG_ARCH_DOVE)		+= dove/
 obj-$(CONFIG_MACH_DOVE)		+= dove/
 obj-y				+= fsl/
+obj-y				+= fujitsu/
 obj-$(CONFIG_ARCH_GEMINI)	+= gemini/
 obj-y				+= imx/
 obj-$(CONFIG_ARCH_IXP4XX)	+= ixp4xx/
diff --git a/drivers/soc/fujitsu/Kconfig b/drivers/soc/fujitsu/Kconfig
new file mode 100644
index 000000000000..cbba0c939e62
--- /dev/null
+++ b/drivers/soc/fujitsu/Kconfig
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# FUJITSU SoC drivers
+#
+menuconfig SOC_FUJITSU
+	bool "FUJITSU SoC drivers"
+	depends on ARCH_A64FX || COMPILE_TEST
+
+if SOC_FUJITSU
+
+config FUJITSU_HARDWARE_BARRIER
+	tristate "FUJITSU HPC Hardware Barrier Driver"
+	depends on ARM64_VHE || COMPILE_TEST
+	help
+	  FUJITSU HPC Hardware Barrier Driver
+
+	  This driver offers hardware barrier functions for A64FX system
+	  which realizes synchronization by PEs in the same CMG (L3 cache
+	  domain) by using implementation defined registers. As control
+	  registers can only be accessed from EL2 on reset, this driver
+	  needs support of VHE.
+	  When built as a module, this will be called as "fujitsu_hwb".
+
+endif # SOC_FUJITSU
diff --git a/drivers/soc/fujitsu/Makefile b/drivers/soc/fujitsu/Makefile
new file mode 100644
index 000000000000..1b8e4c947f7f
--- /dev/null
+++ b/drivers/soc/fujitsu/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_FUJITSU_HARDWARE_BARRIER) +=	fujitsu_hwb.o
-- 
2.26.2