usb: add (move) CONFIG_USB_HOST to Kconfig
The meaning of CONFIG_USB in U-Boot is different from that in Linux.
As you see in drivers/usb/Kconfig of Linux, CONFIG_USB enables the
USB host controller support, while CONFIG_USB_SUPPORT is used to
enable the whole of the USB sub-system.
When I added CONFIG_USB into Kconfig by commit 6e7e9294d321 ("usb:
add basic USB configs in Kconfig"), I planned to follow the Linux's
convention, i.e. CONFIG_USB to enable/disable the USB host support.
Then, commit 68f7c5db2d1e ("usb: Generic USB Kconfig option, that
fits both host and gadget and comments") changed the logic of the
CONFIG_USB to point to the whole of the USB sub-system. As a result,
currently we do not have an option for USB host.
This commit adds CONFIG_USB_HOST, which will be useful to compile
in the USB host support code.
CONFIG_USB_HOST is not referenced at all, but strangely some boards
define it in board headers. I removed them because USB_HOST will be
selected in Kconfig going forward.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 7f562d1..31eec0a 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -3,8 +3,12 @@
#
comment "USB Host Controller Drivers"
+config USB_HOST
+ bool
+
config USB_XHCI_HCD
bool "xHCI HCD (USB 3.0) support"
+ select USB_HOST
---help---
The eXtensible Host Controller Interface (xHCI) is standard for USB 3.0
"SuperSpeed" host controller hardware.
@@ -28,6 +32,7 @@
config USB_EHCI_HCD
bool "EHCI HCD (USB 2.0) support"
+ select USB_HOST
---help---
The Enhanced Host Controller Interface (EHCI) is standard for USB 2.0
"high speed" (480 Mbit/sec, 60 Mbyte/sec) host controller hardware.
@@ -128,6 +133,7 @@
bool "Support for generic OHCI USB controller"
depends on OF_CONTROL
depends on DM_USB
+ select USB_HOST
---help---
Enables support for generic OHCI controller.
@@ -135,6 +141,7 @@
config USB_UHCI_HCD
bool "UHCI HCD (most Intel and VIA) support"
+ select USB_HOST
---help---
The Universal Host Controller Interface is a standard by Intel for
accessing the USB hardware in the PC (which is also called the USB