usb: phy: make PHY driver selection possible by controller drivers

Convert PHY Drivers from menuconfig to menu so that the PHY drivers
can be explicitely selected by the controller drivers.

USB_PHY is no longer a user visible option. It is upto to the PHY
drivers to select it if needed. This patch does so for the existing
PHY drivers that use the USB_PHY library.

Doing so moves the USB_PHY and PHY driver selection problem from the
end user to the PHY and controller driver developer.

e.g.

Earlier, a controller driver (e.g. EHCI_OMAP) that needs to select
a PHY driver (e.g. NOP_PHY) couldn't do so because the PHY driver
depended on USB_PHY. Making the controller driver depend on USB_PHY
has a negative effect i.e. it becomes invisible to the user till
USB_PHY is enabled. Most end users will not familiar with this.

With this patch, the end user just needs to select the controller driver
needed for his/her platform without worrying about which PHY driver to
select.

Also update USB_EHCI_MSM, USB_LPC32XX and USB_OMAP to not depend
on USB_PHY any more. They can safely select the necessary PHY drivers.

[ balbi@ti.com : refreshed on top of my next branch. Changed bool
	followed by default n into def_bool n ]

CC: Pavankumar Kondeti <pkondeti@codeaurora.org>
Acked-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

4 files changed, 21 insertions, 20 deletions

diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 238c5d47cadb..2b3132ede23a 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -45,7 +45,7 @@ obj-$(CONFIG_USB_MICROTEK)	+= image/
 obj-$(CONFIG_USB_SERIAL)        += serial/
 
 obj-$(CONFIG_USB)               += misc/
-obj-$(CONFIG_USB_PHY)           += phy/
+obj-$(CONFIG_USB_SUPPORT)       += phy/
 obj-$(CONFIG_EARLY_PRINTK_DBGP) += early/
 
 obj-$(CONFIG_USB_ATM)           += atm/
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 08dab3c640fd..1e3f52574367 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -144,7 +144,6 @@ config USB_AT91
 config USB_LPC32XX
         tristate "LPC32XX USB Peripheral Controller"
         depends on ARCH_LPC32XX
-        depends on USB_PHY
         select USB_ISP1301
         help
            This option selects the USB device controller in the LPC32xx SoC.
@@ -206,7 +205,6 @@ config USB_FOTG210_UDC
 config USB_OMAP
         tristate "OMAP USB Device Controller"
         depends on ARCH_OMAP1
-        depends on USB_PHY
         select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3 || MACH_OMAP_H4_OTG
         help
            Many Texas Instruments OMAP processors have flexible full
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 4263d011392c..3102b522ca02 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -186,7 +186,6 @@ config USB_EHCI_HCD_AT91
 config USB_EHCI_MSM
         tristate "Support for Qualcomm QSD/MSM on-chip EHCI USB controller"
         depends on ARCH_MSM
-        depends on USB_PHY
         select USB_EHCI_ROOT_HUB_TT
         select USB_MSM_OTG
         ---help---
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 3622fff8b798..f5ea339ec155 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -1,22 +1,10 @@
 #
 # Physical Layer USB driver configuration
 #
-menuconfig USB_PHY
-        bool "USB Physical Layer drivers"
-        help
-          Most USB controllers have the physical layer signalling part
-          (commonly called a PHY) built in.  However, dual-role devices
-          (a.k.a. USB on-the-go) which support being USB master or slave
-          with the same connector often use an external PHY.
-
-          The drivers in this submenu add support for such PHY devices.
-          They are not needed for standard master-only (or the vast
-          majority of slave-only) USB interfaces.
-
-          If you're not sure if this applies to you, it probably doesn't;
-          say N here.
+menu "USB Physical Layer drivers"
 
-if USB_PHY
+config USB_PHY
+        def_bool n
 
 #
 # USB Transceiver Drivers
@@ -24,6 +12,7 @@ if USB_PHY
 config AB8500_USB
         tristate "AB8500 USB Transceiver Driver"
         depends on AB8500_CORE
+        select USB_PHY
         help
           Enable this to support the USB OTG transceiver in AB8500 chip.
           This transceiver supports high and full speed devices plus,
@@ -33,12 +22,14 @@ config FSL_USB2_OTG
         bool "Freescale USB OTG Transceiver Driver"
         depends on USB_EHCI_FSL && USB_FSL_USB2 && PM_RUNTIME
         select USB_OTG
+        select USB_PHY
         help
           Enable this to support Freescale USB OTG transceiver.
 
 config ISP1301_OMAP
         tristate "Philips ISP1301 with OMAP OTG"
         depends on I2C && ARCH_OMAP_OTG
+        select USB_PHY
         help
           If you say yes here you get support for the Philips ISP1301
           USB-On-The-Go transceiver working with the OMAP OTG controller.
@@ -52,12 +43,14 @@ config ISP1301_OMAP
 config MV_U3D_PHY
         bool "Marvell USB 3.0 PHY controller Driver"
         depends on CPU_MMP3
+        select USB_PHY
         help
           Enable this to support Marvell USB 3.0 phy controller for Marvell
           SoC.
 
 config NOP_USB_XCEIV
         tristate "NOP USB Transceiver Driver"
+        select USB_PHY
         help
           This driver is to be used by all the usb transceiver which are either
           built-in with usb ip or which are autonomous and doesn't require any
@@ -76,6 +69,7 @@ config OMAP_USB2
         tristate "OMAP USB2 PHY Driver"
         depends on ARCH_OMAP2PLUS
         select OMAP_CONTROL_USB
+        select USB_PHY
         help
           Enable this to support the transceiver that is part of SOC. This
           driver takes care of all the PHY functionality apart from comparator.
@@ -85,6 +79,7 @@ config OMAP_USB2
 config OMAP_USB3
         tristate "OMAP USB3 PHY Driver"
         select OMAP_CONTROL_USB
+        select USB_PHY
         help
           Enable this to support the USB3 PHY that is part of SOC. This
           driver takes care of all the PHY functionality apart from comparator.
@@ -101,6 +96,7 @@ config SAMSUNG_USBPHY
 config SAMSUNG_USB2PHY
         tristate "Samsung USB 2.0 PHY controller Driver"
         select SAMSUNG_USBPHY
+        select USB_PHY
         help
           Enable this to support Samsung USB 2.0 (High Speed) PHY controller
           driver for Samsung SoCs.
@@ -108,6 +104,7 @@ config SAMSUNG_USB2PHY
 config SAMSUNG_USB3PHY
         tristate "Samsung USB 3.0 PHY controller Driver"
         select SAMSUNG_USBPHY
+        select USB_PHY
         help
           Enable this to support Samsung USB 3.0 (Super Speed) phy controller
           for samsung SoCs.
@@ -115,6 +112,7 @@ config SAMSUNG_USB3PHY
 config TWL4030_USB
         tristate "TWL4030 USB Transceiver Driver"
         depends on TWL4030_CORE && REGULATOR_TWL4030 && USB_MUSB_OMAP2PLUS
+        select USB_PHY
         help
           Enable this to support the USB OTG transceiver on TWL4030
           family chips (including the TWL5030 and TPS659x0 devices).
@@ -135,6 +133,7 @@ config TWL6030_USB
 config USB_GPIO_VBUS
         tristate "GPIO based peripheral-only VBUS sensing 'transceiver'"
         depends on GPIOLIB
+        select USB_PHY
         help
           Provides simple GPIO VBUS sensing for controllers with an
           internal transceiver via the usb_phy interface, and
@@ -145,6 +144,7 @@ config USB_ISP1301
         tristate "NXP ISP1301 USB transceiver support"
         depends on USB || USB_GADGET
         depends on I2C
+        select USB_PHY
         help
           Say Y here to add support for the NXP ISP1301 USB transceiver driver.
           This chip is typically used as USB transceiver for USB host, gadget
@@ -156,6 +156,7 @@ config USB_ISP1301
 config USB_MSM_OTG
         tristate "OTG support for Qualcomm on-chip USB controller"
         depends on (USB || USB_GADGET) && ARCH_MSM
+        select USB_PHY
         help
           Enable this to support the USB OTG transceiver on MSM chips. It
           handles PHY initialization, clock management, and workarounds
@@ -169,6 +170,7 @@ config USB_MV_OTG
         tristate "Marvell USB OTG support"
         depends on USB_EHCI_MV && USB_MV_UDC && PM_RUNTIME
         select USB_OTG
+        select USB_PHY
         help
           Say Y here if you want to build Marvell USB OTG transciever
           driver in kernel (including PXA and MMP series). This driver
@@ -180,6 +182,7 @@ config USB_MXS_PHY
         tristate "Freescale MXS USB PHY support"
         depends on ARCH_MXC || ARCH_MXS
         select STMP_DEVICE
+        select USB_PHY
         help
           Enable this to support the Freescale MXS USB PHY.
 
@@ -188,6 +191,7 @@ config USB_MXS_PHY
 config USB_RCAR_PHY
         tristate "Renesas R-Car USB PHY support"
         depends on USB || USB_GADGET
+        select USB_PHY
         help
           Say Y here to add support for the Renesas R-Car USB common PHY driver.
           This chip is typically used as USB PHY for USB host, gadget.
@@ -210,4 +214,4 @@ config USB_ULPI_VIEWPORT
           Provides read/write operations to the ULPI phy register set for
           controllers with a viewport register (e.g. Chipidea/ARC controllers).
 
-endif # USB_PHY
+endmenu