usb: ehci: Do not use memset on dma coherent memory ...

memset is an optimized operation that at least on ARM64 may only be
called on cached memory, see 32e8842c40 ("ARM: lib64: Make string
functions aware of MMU configuration"). To avoid crashes in the ehci
driver we no longer call memset on memory allocated with
dma_alloc_coherent(), but use a simple memzero32 function instead.

Reported-by: Elmar Albert <EAlbert@data-modul.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/zynq'

Merge branch 'for-next/watchdog'

Merge branch 'for-next/usb'

Merge branch 'for-next/stm32'

Merge branch 'for-next/sdhci'

Merge branch 'for-next/randfixes'

Merge branch 'for-next/pci'

Merge branch 'for-next/misc'

Merge branch 'for-next/layerscape'

Merge branch 'for-next/gpio'

Merge branch 'for-next/fsl-fman'

misc: add ACPI test driver ...

We have a bus driver for ACPI, but no drivers yet. Add a simple (rather
useless) driver that exercises the API, which future drivers can be
based on. As soon as we have proper ACPI drivers, this driver could be
removed again.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

bus: efi: add basic ACPI bus infrastructure ...

It makes sense to support some ACPI tables like the WDAT (Watchdog
Action Table) in barebox. To facilitate this add a ACPI bus and
the necessary bits to integrate ACPI tables into the barebox
device/driver model as devices. These devices are identified by the
four byte signature, which drivers can then match against and the
system description table (SDT) of the device is then available as a
device memory resource.

Even without drivers, with this patch, devinfo and md can now be used
to view the ACPI system description tables, which can be useful
during UEFI payload development.

Support for the ACPI Machine Language and ACPI 5.1 _DSD (Device
Specific Data) is not implemented.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: add support for PCI NS16550 UARTs ...

This ports over the Linux v5.4 8250_pci driver. Unlike Linux, the
barebox ns16550 implementation provides less hooks for covering all the
quirky behavior of all the different 8250-"compatible" hardware blocks.

The barebox driver matches against all serial port the Linux driver does,
but for hardware with quirks that can't be expressed in the current barebox
n16550 API, the probe fails with -ENOSYS and an appropriate message
telling that the quirk handling is missing. This should make future
extension of the driver straight-forward.

Unlike the kernel variant of the driver, most ->exit quirk callbacks can
be dropped in barebox as they often disable IRQs, which we do in the
->init anyway.

This was tested with the EFI PCI driver on qemu with the options:

  -device pci-serial,chardev=cdev0 -chardev file,id=cdev0,path=COM

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Revert "mci: core: make mci_register -EPROBE_DEFER sensitive" ...

The patch does the right thing: When a regulator can't be found and
-EPROBE_DEFER is returned we forward it. However, we have several boards
in the tree which do not have any driver for the regulator, but still
work because the regulator is enabled by default or by board code.

Revert this patch until a solution for these board is found.

This reverts commit 2e16c52.

clk: i.MX6ul: Disable GPMI_IO clk before reparenting ...

Before reparenting the ENFC_SEL mux we have to make sure the GPMI_IO clk
is disabled as recommended in the reference manual. Otherwise glitches
may occur on the GPMI clk which result in a later NAND failure:

MXS: Timeout resetting block via register 0x01806000
mxs_nand 1806000.gpmi-nand@1806000.of: probe failed: Connection timed out

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

PCI: copy over some Linux PCI helpers ...

Linux PCI drivers, like the incoming 8250_pci, make use of these
helpers. Port them over from Linux v5.4.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

efi: add and use new efi_device_has_guid helper ...

We have at least two places where we check if a efidev has a particular
guid and a follow-up commit will introduce a third place.

So lets factor it out into a helper.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

watchdog: core: use new dev_add_param_tristate helper for .running param ...

Previous commit added a dev_add_param_tristate_ro that can be readily
used instead of the enum parameter here. Use it.
This also fixes the issue that running_names had external linkage.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: designware: eqos: remove done TODO ...

The todo split comment is a left-over from refactoring. Remove it.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc: Share code for esdhc_send_cmd() ...

Versions of esdhc_send_cmd() in imx-esdhc.c and imx-esdhc-pbl.c
implement almost the same algorithm. To avoid code repetition, move
that code to imx-esdhc-common.c and adjust all of the users
accordingly.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc: Introduce esdhc_poll() ...

Replace all of the explcitly coded timeout loops with a shared
subroutine that is used by both regular driver and PBL code.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc: Share code for esdhc_(setup|do)_data operations ...

PBL and PIO case of the regular driver do exaclty the same thing
during esdhc_(setup|do)_data stages of esdhc_send_cmd(). Move the code
to a common file and adjust all of the users accordingly.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc-pbl: Use sdhci_set_cmd_xfer_mode() ...

Drop extra code by converting imx-esdhc-pbl.c to use
sdhci_set_cmd_xfer_mode().

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc-pbl: Use sdhci_transfer_data() ...

Drop some extra code by converting esdhc_do_data() to use
sdhci_transfer_data().

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc-pbl: Share IO accessors with regular driver ...

With a bit of a change to PBL ESDHC initialization code it is possible
to share all of the low-level I/O accessor code with the regular
driver, including sharing definitions of flags describing HW's quirks.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc-pbl: Drop 'wrap_wml' flag ...

IMX_SDHCI_WML doesn't change its value during PBL opearation, so it
should be possible to configure it once. Doing it once also allows us
to move the call into SoC specific code making 'wrap_wml' flag
unnecessary.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc-pbl: Share initialization code ...

Move common ESDHC initialization code into subroutines and convert the
rest of the code to use it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: imx-esdhc-pbl: Don't setup DMA registers ...

PBL code is PIO only, so setting up DMA related registers shouldn't be
necessary.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>