Commit 81755b8c20fe ("usb: host: ehci-generic: Make resets and clocks
optional") improved the error check to cover the reset property being
optional. However this was using the wrong error variable for the
check, so would now never fail.

Use the correct error variable for checking the result of
reset_get_bulk(), to actually report genuine errors.

Fixes: 81755b8c20fe ("usb: host: ehci-generic: Make resets and clocks optional")
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

The generic EHCI binding does not *require* resets and clocks
properties, and indeed for instance the Allwinner A20 SoCs does not
need or define any resets in its DT.

Don't easily give up if clk_get_bulk() or reset_get_bulk() return an
error, but check if that is due to the DT simply having no entries for
either of them.

This fixes USB operation on all boards with an Allwinner A10 or A20 SoC,
which were reporting an error after commit ba96176ab70e2999:
=======================
Bus usb@1c14000: ehci_generic usb@1c14000: Failed to get resets (err=-2)
probe failed, error -2
=======================

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

This is used to avoid the ports status of IPPC being brought in kernel
stage, it may cause ports error especially when the xhci controller is
a component of dual-role controller.

Reported-by: Yun-Chien Yu <yun-chien.yu@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>

When the device tree indicates support for role switching through
the "usb-role-switch" property, take the "role-switch-default-mode"
property into account when deciding which role to put the
controller into.

This makes USB devices work on Apple M1 systems where the device
tree may include a "dr_mode" property that is set to "otg", but
where we need to put the controller into "host" mode to see
devices connected to the type-C ports.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>

Since commit 16cc5ad0b439 ("power: regulator: add dummy helper")
regulator dummy helper are always available even if DM_REGULATOR
is not set.
DM_REGULATOR flag is no more needed to protect no DM core,
remove it.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>

Make usage of clock and reset bulk API in order to simplify the code

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>

Add a mask parameter to control the lookup of the PCI region from which
the mapping can be made.

Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

Evolve dm_pci_map_bar() to include an offset and length parameter. These
allow a portion of the memory to be mapped and range checks to be
applied.

Passing both the offset and length as zero results in the previous
behaviour and this is used to migrate the previous callers.

Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

Add a bootdev driver for USB host. It can use the distro boot mechanism to
locate a file, or any other available bootmeth.

Signed-off-by: Simon Glass <sjg@chromium.org>

There are no platforms for this architecture anymore, remove unused
code.

Signed-off-by: Tom Rini <trini@konsulko.com>