Now that the driver is ready, place it at the build system.

Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
---
 drivers/staging/hikey9xx/Kconfig  | 17 +++++++++++++++++
 drivers/staging/hikey9xx/Makefile |  3 ++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/hikey9xx/Kconfig b/drivers/staging/hikey9xx/Kconfig
index 31eb01b5ef2b..7ca083b7e94d 100644
--- a/drivers/staging/hikey9xx/Kconfig
+++ b/drivers/staging/hikey9xx/Kconfig
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
+# to be placed at drivers/spmi
 config SPMI_HISI3670
        tristate "Hisilicon 3670 SPMI Controller"
        select IRQ_DOMAIN_HIERARCHY
@@ -8,3 +9,19 @@ config SPMI_HISI3670
          If you say yes to this option, support will be included for the
          built-in SPMI PMIC Arbiter interface on Hisilicon 3670
          processors.
+
+# to be placed at drivers/mfd
+config MFD_HI6421_SPMI
+       tristate "HiSilicon Hi6421v600 SPMI PMU/Codec IC"
+       depends on OF
+       select MFD_CORE
+       select REGMAP_MMIO
+       help
+         Add support for HiSilicon Hi6421v600 SPMI PMIC. Hi6421 includes
+         multi-functions, such as regulators, RTC, codec, Coulomb counter,
+         etc.
+
+         This driver includes core APIs _only_. You have to select
+         individual components like voltage regulators under corresponding
+         menus in order to enable them.
+         We communicate with the Hi6421v600 via a SPMI bus.
diff --git a/drivers/staging/hikey9xx/Makefile 
b/drivers/staging/hikey9xx/Makefile
index e8085abce444..79de37da7a8f 100644
--- a/drivers/staging/hikey9xx/Makefile
+++ b/drivers/staging/hikey9xx/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 
-obj-$(CONFIG_SPMI_HISI3670) += hisi-spmi-controller.o
+obj-$(CONFIG_SPMI_HISI3670)    += hisi-spmi-controller.o
+obj-$(CONFIG_MFD_HI6421_SPMI)  += hi6421-spmi-pmic.o
-- 
2.26.2

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