media: staging: phy-rockchip-dphy-rx0: add Rockchip MIPI Synopsys DPHY RX0 driver

Add driver for Rockchip MIPI Synopsys DPHY driver
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/Kconfig

@@ -38,4 +38,6 @@ source "drivers/staging/media/ipu3/Kconfig"
 
 source "drivers/staging/media/soc_camera/Kconfig"
 
+source "drivers/staging/media/phy-rockchip-dphy-rx0/Kconfig"
+
 endif

drivers/staging/media/Makefile

@@ -8,3 +8,4 @@ obj-$(CONFIG_TEGRA_VDE)		+= tegra-vde/
 obj-$(CONFIG_VIDEO_HANTRO)	+= hantro/
 obj-$(CONFIG_VIDEO_IPU3_IMGU)	+= ipu3/
 obj-$(CONFIG_SOC_CAMERA)	+= soc_camera/
+obj-$(CONFIG_PHY_ROCKCHIP_DPHY_RX0)	+= phy-rockchip-dphy-rx0/

drivers/staging/media/phy-rockchip-dphy-rx0/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+
+config PHY_ROCKCHIP_DPHY_RX0
+	tristate "Rockchip MIPI Synopsys DPHY RX0 driver"
+	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
+	select GENERIC_PHY_MIPI_DPHY
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip MIPI Synopsys DPHY RX0
+	  associated to the Rockchip ISP module present in RK3399 SoCs.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called phy-rockchip-dphy-rx0.

drivers/staging/media/phy-rockchip-dphy-rx0/Makefile

+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PHY_ROCKCHIP_DPHY_RX0)		+= phy-rockchip-dphy-rx0.o

drivers/staging/media/phy-rockchip-dphy-rx0/TODO

+The main reason for keeping this in staging is because the only driver
+that uses this is rkisp1, which is also in staging. It should be moved together
+with rkisp1.
+
+Please CC patches to Linux Media <linux-media@vger.kernel.org> and
+Helen Koike <helen.koike@collabora.com>.