phy: Add USB HSIC PHY driver for Marvell MMP3 SoC

Add PHY driver for the HSICs found on Marvell MMP3 SoC. The driver is
rather straightforward -- the PHY essentially just needs to be enabled.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lore.kernel.org/r/20200925235828.228626-4-lkundrak@v3.sk
Signed-off-by: Vinod Koul <vkoul@kernel.org>
diff --git a/drivers/phy/marvell/Kconfig b/drivers/phy/marvell/Kconfig
index 8f6273c..6c96f2b 100644
--- a/drivers/phy/marvell/Kconfig
+++ b/drivers/phy/marvell/Kconfig
@@ -116,3 +116,15 @@
 	  The PHY driver will be used by Marvell udc/ehci/otg driver.
 
 	  To compile this driver as a module, choose M here.
+
+config PHY_MMP3_HSIC
+	tristate "Marvell MMP3 USB HSIC PHY Driver"
+	depends on MACH_MMP3_DT || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Enable this to support Marvell MMP3 USB HSIC PHY driver for
+	  Marvell MMP3 SoC. This driver will be used my the Marvell EHCI
+	  driver to initialize the interface to internal USB HSIC
+	  components on MMP3-based boards.
+
+	  To compile this driver as a module, choose M here.