phy: amlogic: Add AXG MIPI D-PHY driver

The Amlogic AXG SoCs embeds a MIPI D-PHY used to communicate with DSI
panels.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20201116101315.71720-3-narmstrong@baylibre.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/amlogic/Kconfig

@@ -70,3 +70,15 @@ config PHY_MESON_AXG_MIPI_PCIE_ANALOG
 	  Enable this to support the Meson MIPI + PCIE analog PHY
 	  found in Meson AXG SoCs.
 	  If unsure, say N.
+
+config PHY_MESON_AXG_MIPI_DPHY
+	tristate "Meson AXG MIPI DPHY driver"
+	default ARCH_MESON
+	depends on OF && (ARCH_MESON || COMPILE_TEST)
+	select GENERIC_PHY
+	select REGMAP_MMIO
+	select GENERIC_PHY_MIPI_DPHY
+	help
+	  Enable this to support the Meson MIPI DPHY found in Meson AXG
+	  SoCs.
+	  If unsure, say N.

drivers/phy/amlogic/Makefile

@@ -5,3 +5,4 @@ obj-$(CONFIG_PHY_MESON_G12A_USB2)		+= phy-meson-g12a-usb2.o
 obj-$(CONFIG_PHY_MESON_G12A_USB3_PCIE)		+= phy-meson-g12a-usb3-pcie.o
 obj-$(CONFIG_PHY_MESON_AXG_PCIE)		+= phy-meson-axg-pcie.o
 obj-$(CONFIG_PHY_MESON_AXG_MIPI_PCIE_ANALOG)	+= phy-meson-axg-mipi-pcie-analog.o
+obj-$(CONFIG_PHY_MESON_AXG_MIPI_DPHY)		+= phy-meson-axg-mipi-dphy.o