This goes against what described in the ZIO framework, but it is
actually a source of problems because the framework is largely
unmaintained.

With this patch the driver play only with raw values. It will be part
of the library duty to propose a different convention.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

The data coming out from the FMC-ADC-110M FPGA is always using the
little-endian byte order. This means that we need to fix the byte
order only on big-endian CPUs.

This allows to improve performances on SVEC-based designs since there
is no need anymore to fix the endianness in software becuase it is
already done in hardware.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

`get_seconds` disappeared in kernel 5.11 and onwards,
it is now required to call `ktime_get_real_seconds`.
Signed-off-by: Gwenhael GOAVEC <gwenhael.goavec@femto-st.fr>
Signed-off-by: Mathis MARION <mathis.marion@grenoble-inp.org>

`setup_timer` is no longer available in kernel 4.15 and onwards,
in favor of `timer_setup`.
Before, we could pass an argument to the callback function as an
unsigned int (generally used with a pointer cast), but now the timer
itself is passed and we retrieve the container struct with a new
macro `from_timer` which is uses `container_of`.
The flags parameter can be set as 0 for the same behavior.
Signed-off-by: Gwenhael GOAVEC <gwenhael.goavec@femto-st.fr>
Signed-off-by: Mathis MARION <mathis.marion@grenoble-inp.org>
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

The signature for `__sg_alloc_table_from_pages` changed in
kernel 5.10 and onwards.
Two agruments are added which can be passed as NULL and 0
for the same behavior as before, except for error checking,
which was addressed in this patch.
Signed-off-by: Gwenhael GOAVEC <gwenhael.goavec@femto-st.fr>
Signed-off-by: Mathis MARION <mathis.marion@grenoble-inp.org>

The return value of debugfs_create_regset32() was not really used, if
not to inform the user that a debugfs file was missing due to an
error.

After Linux 5.8, the return value disappeared, so instead of keeping
pre-processor conditions, just align with the best practices of the
latest versions.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

The signature for `debugfs_create_regset32` changed from
returning a `struct dentry *` to `void`.
Error checking is no longer possible.
Signed-off-by: Gwenhael GOAVEC <gwenhael.goavec@femto-st.fr>
Signed-off-by: Mathis MARION <mathis.marion@grenoble-inp.org>

`unsigned int ioread32(void __iomem *)` became
`unsigned int ioread32(const void __iomem *)` in
kernel 5.8 and above.
Changed struct fa_memory_ops accordingly.

Added missing include for linux/io.h
Signed-off-by: Gwenhael GOAVEC <gwenhael.goavec@femto-st.fr>
Signed-off-by: Mathis MARION <mathis.marion@grenoble-inp.org>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

5.0.4 - 2021-07-09
==================
Fixed
-----
- sw: fix endianess only when required
- sw: ADC chip reset is BIT(7)

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

In some SVEC+ADC designs data is swapped in HW, so there
is no need to swap them again in software
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

5.0.3 - 2021-07-05
==================
Added:
-----
- bld: CI support

Fixed
-----
- doc: add offset units
- sw: calibration value at boot time incorrect
- sw: use YAML for fau-calibration

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

5.0.3 - 2021-07-05
==================
Added:
-----
- bld: CI support

Fixed
-----
- doc: add offset units
- sw: calibration value at boot time incorrect
- sw: use YAML for fau-calibration

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>