eeprom: at24: Convert the driver to NVMEM ...

Convert AT24 driver to use NVMEM subsystem instead of explicitly
creating a dedicated cdev. This way it becomes possible to access the
contenst of EEPROM via NVMEM API, which could be usefull for things
like MAC-addresses and such.

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

eeprom: at24: Drop at24_cdev_protect() ...

Instead of exposing a dedictaed .protect() callback, mimic the
behaviour of corresponding driver in Linux and adjust the value of WP
pin in .write() callback as necessary. This is done in order to
convert this driver to NVMEM subsytem.

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

nvmem: Parse partitions information ...

Add code to parse partition information that might be specified as a
part of the DT config.

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

nvmem: Use already existing dev pointer in nvmem_register_cdev() ...

There's already a struct device_d * pointer variable. Use it.

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

nvmem: Use helper variable in nvmem_register_cdev() ...

Add struct cdev * helper variable to nvmem_register_cdev() in order to
avoid repeating &nvmem->cdev a bunch of times

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

kbuild: use -fmacro-prefix-map to make __FILE__ a relative path ...

Linux commit a73619a

The __FILE__ macro is used everywhere in the kernel to locate the file
printing the log message, such as WARN_ON(), etc.  If the kernel is
built out of tree, this can be a long absolute path, like this:

  WARNING: CPU: 1 PID: 1 at /path/to/build/directory/arch/arm64/kernel/foo.c:...

This is because Kbuild runs in the objtree instead of the srctree,
then __FILE__ is expanded to a file path prefixed with $(srctree)/.

Commit 9da0763bdd82 ("kbuild: Use relative path when building in a
subdir of the source tree") improved this to some extent; $(srctree)
becomes ".." if the objtree is a child of the srctree.

For other cases of out-of-tree build, __FILE__ is still the absolute
path.  It also means the kernel image depends on where it was built.

A brand-new option from GCC, -fmacro-prefix-map, solves this problem.
If your compiler supports it, __FILE__ is the relative path from the
srctree regardless of O= option.  This provides more readable log and
more reproducible builds.

Please note __FILE__ is always an absolute path for external modules.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mips: use generic bitsperlong.h ...

Linux highly depends on the fact that the 'long' and the pointer
have the same width, and so does barebox.

So, we can always use include/asm-generic/bitsperlong.h, which
determines BITS_PER_LONG depending on CONFIG_64BIT.

This is what Linux does (at least in the kernel-space), and barebox
can follow it.

It is true that MIPS Linux references _MIPS_SZLONG
(arch/mips/include/uaspi/asm/bitsperlong.h), but this is bacause
the user-space cannot reference CONFIG options. For the kernel-space,
it uses the generic definition from include/asm-generic/bitsperlong.h.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

riscv: use generic bitsperlong.h ...

Linux highly depends on the fact that the 'long' and the pointer
have the same width, and so does barebox.

So, we can always use include/asm-generic/bitsperlong.h, which
determines BITS_PER_LONG depending on CONFIG_64BIT.

This is what Linux does (at least in the kernel-space), and barebox
can follow it.

Currently, barebox only supports 32-bit riscv, but this should work
when it supports 64-bit by adding CONFIG_64BIT to arch/riscv/Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kconfig: update to Linux 5.3-rc3 ...

Recently, Linux merged some important fixes.

Commit 8e2442a5f86e ("kconfig: fix missing choice values in auto.conf")
Commit 0c5b6c28ed68 ("kconfig: Clear "written" flag to avoid data loss")

Barebox must import them.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

docs: Use a proper name for AM335x defconfig ...

Fixes: 3067cd85d ("ARM: omap: am33xx_defconfig: Enable more boards and rename")
Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

console: return number of characters written in fops_write ...

struct cdev_operations write() callback is supposed to return the number
of characters written. Do this instead of returning 0 for the console
device files.

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

dts/imx25: drop sram node ...

This node is in dts/src/arm/imx25.dtsi since 9313920df6d3 ("dts: update
to v3.16-rc1").

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/zii'

Merge branch 'for-next/stm32'

Merge branch 'for-next/socfpga'

Merge branch 'for-next/sandbox'

Merge branch 'for-next/pstore'

Merge branch 'for-next/mvebu'

Merge branch 'for-next/misc'

Merge branch 'for-next/mips'

Merge branch 'for-next/imx'

Merge branch 'for-next/dts'

Merge branch 'for-next/clk'

Merge branch 'for-next/Kconfig'

Release v2019.07.0 ...

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

ARM: dts: am335x-phytec-state: Add backend-storage-type ...

Add the backend-storage-type for both states and set it to "direct" as
the backend is an EEPROM.

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

watchdog: stm32_iwdg: remove left-over comment ...

The reset reason part of the code is based on the i.MX6's and duplicated
a comment from there, which isn't applicable to the STM32. Delete it.

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

usb: imx-usb-phy: select syscon driver ...

Since b904eca92f we depend on syscon once the "fsl,anatop" property is
found. select MFD_SYSCON to make sure it is available.

Fixes: b904eca92f ("usb: imx-usb-phy: Disable charger detect during initialization")
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: dts: imx6ul: phycore: Add phyCORE-i.MX 6ULL with eMMC ...

Add a phyCORE-i.MX 6ULL with eMMC. It has following features:
	- i.MX 6ULL Y2 792 MHz
	- 512 MB RAM
	- 4 GB eMMC
	- 10/100 MBits Ethernet
	- USB OTG
	- USB Host

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: dts: imx6ul: phycore: Add support for eMMC ...

Add support for phyCORE-i.MX 6UL/ULL modules with eMMC instead of NAND
flash.

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>