gpio: atmel_pio4: give a full configuration when muxing pins

When a pin is muxed to a peripheral or as a GPIO, the only
configuration that can be set is the pullup. It is too restrictive
so this pat

gpio: atmel_pio4: give a full configuration when muxing pins

When a pin is muxed to a peripheral or as a GPIO, the only
configuration that can be set is the pullup. It is too restrictive
so this patch allows to give a full configuration.

Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>

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SPDX: Convert all of our single license tags to Linux Kernel style

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So

SPDX: Convert all of our single license tags to Linux Kernel style

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.

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

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Merge git://git.denx.de/u-boot-dm

dm: gpio: Correct use of -ENODEV in drivers

In U-Boot -ENODEV means that there is no device. When there is a problem
with the device, drivers should return an error like -ENXIO or -EREMOTEIO.
When t

dm: gpio: Correct use of -ENODEV in drivers

In U-Boot -ENODEV means that there is no device. When there is a problem
with the device, drivers should return an error like -ENXIO or -EREMOTEIO.
When the device tree properties cannot be read correct , they should
return -EINVAL.

Update various GPIO drivers to follow this rule, to help with consistency
for future driver writers.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Adam Ford <aford173@gmail.com>

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atmel: Fix up use of dm_scan_fdt_node()

This function should not be used outside the core driver-model code.
Update it to use dm_scan_fdt_dev() instead.

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

dm: Rename dev_addr..() functions

These support the flat device tree. We want to use the dev_read_..()
prefix for functions that support both flat tree and live tree. So rename
the existing function

dm: Rename dev_addr..() functions

These support the flat device tree. We want to use the dev_read_..()
prefix for functions that support both flat tree and live tree. So rename
the existing functions to avoid confusion.

In the end we will have:

1. dev_read_addr...() - works on devices, supports flat/live tree
2. devfdt_get_addr...() - current functions, flat tree only
3. of_get_address() etc. - new functions, live tree only

All drivers will be written to use 1. That function will in turn call
either 2 or 3 depending on whether the flat or live tree is in use.

Note this involves changing some dead code - the imx_lpi2c.c file.

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

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Merge git://git.denx.de/u-boot-dm

dm: core: Replace of_offset with accessor

At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree,

dm: core: Replace of_offset with accessor

At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

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

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Merge branch 'master' of git://git.denx.de/u-boot-atmel

gpio: atmel_pio4: Remove unnecessary clock calling

Due to the peripheral clock driver improvement, remove the
unnecessary clock calling.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by:

gpio: atmel_pio4: Remove unnecessary clock calling

Due to the peripheral clock driver improvement, remove the
unnecessary clock calling.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Stephen Warren <swarren@nvidia.com>

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Merge branch 'master' of git://git.denx.de/u-boot-atmel

gpio: atmel_pio4: Rework to support DM & DT

Rework the driver to support driver model and device tree, and
support to regard the pio4 pinctrl device as a child of
atmel_pio4 device.

Signed-off-by:

gpio: atmel_pio4: Rework to support DM & DT

Rework the driver to support driver model and device tree, and
support to regard the pio4 pinctrl device as a child of
atmel_pio4 device.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

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gpio: atmel_pio4: Move PIO4 definitions to head file

In order to make these PIO4 definitions shared with AT91 PIO4
pinctrl driver, move them from the existing gpio driver to the
head file, and rephr

gpio: atmel_pio4: Move PIO4 definitions to head file

In order to make these PIO4 definitions shared with AT91 PIO4
pinctrl driver, move them from the existing gpio driver to the
head file, and rephrase them.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

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Merge branch 'master' of git://git.denx.de/u-boot-atmel

gpio: atmel: Add the PIO4 driver support

The PIO4 is introduced from SAMA5D2, as a new version
for Atmel PIO controller.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>