Hi again,
This is my second try of getting HCD providers into usb subsystem.
During discussion of V1 I realized there are about 26 drivers adding a
single HCD and all of them would need to be modified. So instead I
decided to put relevant code in usb_add_hcd. It checks if the HCD we
register is a primary one and if so, it registers a proper provider.
Please note that of_hcd_xlate_simple was also extended to allow getting
shared HCD (which is used e.g. in case of XHCI).
So now you can have something like:
ohci: ohci@21000 {
#usb-cells = <0>;
compatible = "generic-ohci";
reg = <0x00001000 0x1000>;
interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
};
ehci: ehci@22000 {
#usb-cells = <0>;
compatible = "generic-ehci";
reg = <0x00002000 0x1000>;
interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
};
xhci: xhci@23000 {
#usb-cells = <1>;
compatible = "generic-xhci";
reg = <0x00003000 0x1000>;
interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
};
The last (second) patch is not supposed to be applied, it's used only as
a proof and example of how providers can be used.
Rafał Miłecki (1):
usb: core: add support for HCD providers
drivers/usb/core/Makefile | 1 +
drivers/usb/core/hcd.c | 8 ++++
drivers/usb/core/provider.c | 99 +++++++++++++++++++++++++++++++++++++++++++
include/dt-bindings/usb/usb.h | 7 +++
include/linux/usb/hcd.h | 2 +
include/linux/usb/provider.h | 39 +++++++++++++++++
6 files changed, 156 insertions(+)
create mode 100644 drivers/usb/core/provider.c
create mode 100644 include/dt-bindings/usb/usb.h
create mode 100644 include/linux/usb/provider.h
--
1.8.4.5
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