This adds drivers model support of serial port to Koelsch board,
and migrate serial port to drivers model.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

Commit referenced in subject breaks IGEP0032 build with the following
error:

  drivers/misc/status_led.c:30:7: error: 'RED_LED_GPIO' undeclared here (not in a function)
  scripts/Makefile.build:275: recipe for target 'drivers/misc/status_led.o' failed
  make[2]: *** [drivers/misc/status_led.o] Error 1
  scripts/Makefile.build:420: recipe for target 'drivers/misc' failed
  make[1]: *** [drivers/misc] Error 2
  Makefile:1093: recipe for target 'drivers' failed
  make: *** [drivers] Error 2

Fix this by skipping the status led on IGEP0032 machine as is not available
and throw an error for future machines if the status led is not configured
to avoid build breakage.

Reported-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

Fix bus width switching from 8-bit mode down to 4-bit or 1-bit modes on
Samsung SoCs using SDHCI_QUIRK_USE_WIDE8.  These SoCs report controller
version 2.0 yet they support 8-bit bus widths.  If 8-bit mode was
previously enabled and then an operation like "mmc dev" caused a switch
back down to 4-bit or 1-bit mode, WIDE8 was left set, causing failures.

This problem was manifested by "mmc dev" timing out.

Signed-off-by: Matt Reimer <mreimer@sdgsystems.com>

Depending on the boot priority, the eMMC/SD cards,
can be initialized with the same numbers for each boot.

To be sure which mmc device is SD and which is eMMC,
this info is printed by 'mmc list' command, when
the init is done.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>

Before this commit, the mmc devices were always registered
in the same order. So dwmmc channel 0 was registered as mmc 0,
channel 1 as mmc 1, etc.
In case of possibility to boot from more then one device,
the CONFIG_SYS_MMC_ENV_DEV should always point to right mmc device.

This can be achieved by init boot device as first, so it will be
always registered as mmc 0. Thanks to this, the 'saveenv' command
will work fine for all mmc boot devices.

Exynos based boards usually uses mmc host channels configuration:
- 0, or 0+1 for 8 bit  - as a default boot device (usually eMMC)
- 2 for 4bit - as an optional boot device (usually SD card slot)

And usually the boot order is defined by OM pin configuration,
which can be changed in a few ways, eg.
- Odroid U3     - eMMC card insertion -> first boot from eMMC
- Odroid X2/XU3 - boot priority jumper

By this commit, Exynos dwmmc driver will check the OM pin configuration,
and then try to init the boot device and register it as mmc 0.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Akshay Saraswat <akshay.s@samsung.com>

High Capacity (e)MMC cards work fine on sun4i / sun5i, and not having this
capability set causes u-boot to not recognize the eMMC on an Utoo P66 A13
tablet, so always set it thereby fixing this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

Clksel value is exynos specific value.
It removed "clksel_val" into dwmci_host and created the
"dwmci_exynos_priv_data" structure for exynos specific data.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

"clksel_val" is assigned to property of mmc or defined value.
But it doesn't write at initial sequence.
There is a reason that get the wrong source-clock value.
This patch fixed it.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

If mode is not DDR-mode, then it needs to clear it.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

The SD/MMC version scheme was buggy when dealing with standard
major.minor.change cases. Fix it by using something similar to
the linux's kernel versioning method.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Reported-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>

Right now U-Boot supports the CONFIG_OLD_SUNXI_KERNEL_COMPAT option,
which makes it go out of its way in limiting the selection of PLL clock
frequencies and PMIC voltages in order not to upset outdated buggy
sunxi-3.4 kernel releases. And if the CONFIG_OLD_SUNXI_KERNEL_COMPAT
option is not set, then booting such old kernels exhibits various
failures at runtime. This is very user unfriendly, and there were
already several incidents when people wasted their time being hit
by these runtime failures and trying to debug them.

The right solution is not to add hacks and workarounds to the mainline
U-Boot, but to fix these bugs in the sunxi-3.4 kernel. And in fact,
the updated sunxi-3.4 kernels already exist. Still we need to follow
the 'Principle of Least Surprise' and U-Boot needs to ensure that
the old buggy kernels are not getting happily booted when the
CONFIG_OLD_SUNXI_KERNEL_COMPAT option is not set. And this patch
addresses this particular issue.

This patch makes U-Boot store the 'compatibility revision' number in
the top 4 bits of the machine id and pass it to the kernel. The old
buggy kernels will fail to load with a very much googlable error
message on the serial console (the "r1 = 0x100010bb" part of it):

  "Error: unrecognized/unsupported machine ID (r1 = 0x100010bb)"

This error message can be documented in the linux-sunxi wiki with
proper explanations about how to resolve this situation and where
to get the necessary bugfixes for the sunxi-3.4 kernel.

The fixed sunxi-3.4 kernels implement a revision compatibility check
and clear the top 4 bits of the machine id if everything is alright.
By accepting the machine id with the bits 31:28 set to 1, the sunxi-3.4
kernel effectively certifies that it has the PLL5 clock speed and
AXP209 DCDC3 voltage fixes applied.

It is still possible to set the CONFIG_OLD_SUNXI_KERNEL_COMPAT option
in U-Boot if the user desires to use an outdated unpatched sunxi-3.4
kernel.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

While discussing with some people how to get the Linux kernel to do the
right thing wrt sending output to both the serial console and the
hdmi out / lcd screen when booting on ARM devices, Grant Likely pointed out
that there already is a solution for this.

All we need to do is set the /chosen/stdout-path fdt property, and if no
console= arguments were specified on the kernel commandline the kernel
will honor this and add this device as a console (next to the primary
video output on hdmi).

And u-boot already has support for setting this, all we need to do is
define OF_STDOUT_PATH and then everything will just work ootb, without
people needing to meddle with adding console= arguments in extlinux.conf .

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Tom Rini <trini@ti.com>

Older linux-sunxi-3.4 kernels override our PLL6 setting with 300 MHz,
halving the mbus frequency, so set it to 300 MHz ourselves and base the
mbus divider on that.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

Sending out 5V when there is a charger connected to the otg port is not a
good idea, so check for this and error out.

Note this commit currently breaks otg support on the q8h tablets, as we need
to do some magic with the pmic there to get vbus info, this is deliberate
(better safe then sorry), fixing this is on my TODO list.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

The UTOO P66 is a 6" A13 tablet / lcd ereader. It features a 6" 480x800 ips
lcd screen, 512MB RAM & 4GB emmc.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

High Capacity (e)MMC cards work fine on sun4i / sun5i, and not having this
capability set causes u-boot to not recognize the eMMC on an Utoo P66 A13
tablet, so always set it thereby fixing this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

USB doesn't seem to work yet; the controller detects the on-board Hub/
Ethernet device but can't read the descriptors from it. I haven't
investigated yet.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>

The bcm2835 and bcm2836 are essentially identical, except:
- The CPU is an ARM1176 v.s. a quad-core Cortex-A7.
- The physical address of many IO controllers has moved.

Rather than introducing a whole new bcm2836 value for $(SOC) or $(ARCH),
update the existing bcm2835 code to handle the minor differences, and
plumb it into the ARMv7 CPU architecture.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>

This commit adds $(srctree)/arch/arm/$(machdirs)/include/mach to
the headers search path.

It allows us to replace "#include <asm/arch/foo.h>" with
"#include <mach/foo.h>".  As "#include <asm/arch/foo.h>" is still
supported, we can modify each file one by one.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

Move arch/arm/include/asm/arch-keystone/*
  -> arch/arm/mach-keystone/include/mach/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>

Move arch/arm/include/asm/arch-orion5x/*
  -> arch/arm/mach-orion5x/include/mach/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>

Move arch/arm/include/asm/arch-nomadik/*
  -> arch/arm/mach-nomadik/include/mach/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nomadik Linux Team <STN_WMM_nomadik_linux@list.st.com>
Cc: Alessandro Rubini <rubini@unipv.it>

Move arch/arm/include/asm/arch-kirkwood/*
  -> arch/arm/mach-kirkwood/include/mach/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Stefan Roese <sr@denx.de>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Luka Perkov <luka.perkov@sartura.hr>

Move arch/arm/include/asm/arch-davinci/*
  -> arch/arm/mach-davinci/include/mach/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>

Move arch/arm/include/asm/arch-at91/*
  -> arch/arm/mach-at91/include/mach/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>

In U-Boot, SoC-specific headers are placed in
arch/$(ARCH)/include/asm/arch-$(SOC) and a symbolic link to that
directory is created at the early stage of the build process.

Creating and removing a symbolic link during the build is not
preferred.  In fact, Linux Kernel did away with include/asm-$(ARCH)
directories a long time time ago.

As for ARM, now it is possible to collect SoC sources into
arch/arm/mach-$(SOC).  It is also reasonable to move SoC headers
into arch/arm/mach-$(SOC)/include/mach.

This commit prepares for that.
If the directory arch/$(ARCH)/mach-$(SOC)/include/mach exists,
a symbolic to that directory is created.  Otherwise, a symbolic link
to arch/$(ARCH)/include/asm/arch-$(SOC) or arch-$(CPU) is created.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

Move
arch/arm/cpu/armv7/keystone/* -> arch/arm/mach-keystone/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>

Move
arch/arm/cpu/arm926ejs/versatile/* -> arch/arm/mach-versatile/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

Move
arch/arm/cpu/arm926ejs/orion5x/* -> arch/arm/mach-orion5x/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>

Move
arch/arm/cpu/armv7/highbank/* -> arch/arm/mach-highbank/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Rob Herring <robh@kernel.org>

Move
arch/arm/cpu/arm926ejs/nomadik/* -> arch/arm/mach-nomadik/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nomadik Linux Team <STN_WMM_nomadik_linux@list.st.com>
Cc: Alessandro Rubini <rubini@unipv.it>

Move
arch/arm/cpu/arm926ejs/kirkwood/* -> arch/arm/mach-kirkwood/*

Note:
 Perhaps, can we merge arch/arm/mach-kirkwood and
 arch/arm/mvebu-common into arch/arm/mach-mvebu, like Linux?

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Stefan Roese <sr@denx.de>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Luka Perkov <luka.perkov@sartura.hr>

Move
arch/arm/cpu/arm926ejs/davinci/* -> arch/arm/mach-davinci/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>

This commit moves files as follows:

 arch/arm/cpu/arm720t/tegra20/*      -> arch/arm/mach-tegra/tegra20/*
 arch/arm/cpu/arm720t/tegra30/*      -> arch/arm/mach-tegra/tegra30/*
 arch/arm/cpu/arm720t/tegra114/*     -> arch/arm/mach-tegra/tegra114/*
 arch/arm/cpu/arm720t/tegra124*      -> arch/arm/mach-tegra/tegra124/*
 arch/arm/cpu/arm720t/tegra-common/* -> arch/arm/mach-tegra/*
 arch/arm/cpu/armv7/tegra20/*        -> arch/arm/mach-tegra/tegra20/*
 arch/arm/cpu/armv7/tegra30/*        -> arch/arm/mach-tegra/tegra30/*
 arch/arm/cpu/armv7/tegra114/*       -> arch/arm/mach-tegra/tegra114/*
 arch/arm/cpu/armv7/tegra124/*       -> arch/arm/mach-tegra/tegra124/*
 arch/arm/cpu/armv7/tegra-common/*   -> arch/arm/mach-tegra/*
 arch/arm/cpu/tegra20-common/*       -> arch/arm/mach-tegra/tegra20/*
 arch/arm/cpu/tegra30-common/*       -> arch/arm/mach-tegra/tegra30/*
 arch/arm/cpu/tegra114-common/*      -> arch/arm/mach-tegra/tegra114/*
 arch/arm/cpu/tegra124-common/*      -> arch/arm/mach-tegra/tegra124/*
 arch/arm/cpu/tegra-common/*         -> arch/arm/mach-tegra/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Tested-by: Simon Glass <sjg@chromium.org> [ on nyan-big ]
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Tom Warren <twarren@nvidia.com>

This commit moves source files as follows:

  arch/arm/cpu/arm920t/at91/*   -> arch/arm/mach-at91/arm920t/*
  arch/arm/cpu/arm926ejs/at91/* -> arch/arm/mach-at91/arm926ejs/*
  arch/arm/cpu/armv7/at91/*     -> arch/arm/mach-at91/armv7/*
  arch/arm/cpu/at91-common/*    -> arch/arm/mach-at91/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.co>

In U-boot, the directory structure, arch/$(ARCH)/cpu/$(CPU)/$(SOC)/
has been adopted except that $(CPU) is missing from some
architectures and $(SOC) is missing from some CPUs.

This structure did not fit very well in some cases.

[1] AT91

AT91 SoC family have been developed across some ARM processor
generations.  Generally speaking, some IPs are often re-used in the
same SoC family (same SoC vendor) even when the main processor is
updated.  As a result, a SoC-common directory is needed in the upper
level.  Currently, AT91 source files are placed as follows:

  arch/arm/cpu/arm920t/at91/*
  arch/arm/cpu/arm926ejs/at91/*
  arch/arm/cpu/armv7/at91/*
  arch/arm/cpu/at91-common/*

Once directories are split, the motivation for refactorings across
CPU directories is lost.  Some files in arm920t/at91/ and
arm926ejs/at91/ are so similar that they could be merged.

[2] Tegra

Tegra is a little bit special case where different CPUs are used for
SPL and the main U-boot.  To obey the arch/$(ARCH)/cpu/$(CPU)/$(SOC)
structure, the source files must be placed across the CPUs,
again SoC-common directory is necessary in the upper level.

Moreover, there are several families in Tegra: Tegra20, Tegra30,
Tegra114, Tegra124.  Here again, the tegra-common directory is needed
to contain commonly-used files.

Tegra directories have been sprinkled in the directory structure.

  arch/arm/cpu/arm720t/tegra20
  arch/arm/cpu/arm720t/tegra30
  arch/arm/cpu/arm720t/tegra114
  arch/arm/cpu/arm720t/tegra124
  arch/arm/cpu/arm720t/tegra-common
  arch/arm/cpu/armv7/tegra20
  arch/arm/cpu/armv7/tegra30
  arch/arm/cpu/armv7/tegra114
  arch/arm/cpu/armv7/tegra124
  arch/arm/cpu/armv7/tegra-common
  arch/arm/cpu/tegra20-common
  arch/arm/cpu/tegra30-common
  arch/arm/cpu/tegra114-common
  arch/arm/cpu/tegra124-common
  arch/arm/cpu/tegra-common

As you see, splitting SoC code by the CPU is not going well,
especially for ARM.
Why don't we collect SoC-specific files into a single place?

A good example we can follow is Linux's arch/arm/mach-* structure.

This item was discussed in the following thread:
http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/188548/



Looks like I got some positive responses and we are almost ready to
start this movement.

This commit prepares arch/arm/Makefile for describing machdirs in it.

After this commit, we can move SoC directory to arch/arm/mach-$(SOC)
in simple steps although some cases such as AT91 and Tegra need more
fixes.

What we generally have to do is:

[1] Move files arch/arm/cpu/$(CPU)/$(SOC)/* to arch/arm/mach-$(SOC)/*
[2] Add machine entry into arch/arm/Makefile
[3] Remove "obj-y += $(SOC)" from arch/arm/cpu/$(CPU)/Makefile
[4] Fix the Kconfig file path in arch/arm/Kconfig
[5] Modify MAINTAINERS if necessary

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

The board select menu in arch/arm/Kconfig is still big.
To slim down it, this commit moves AT91 boards to
arch/arm/mach-at91/Kconfig.
Also, consolidate "config SYS_SOC" in each board Kconfig.

The Kconfig files under board/ directory were modified with the
following command:

    find board -name Kconfig | xargs sed -i -e '
    /config SYS_SOC/ {
        N
        /default "at91"/ {
            N
            d
        }
    }
    '

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.co>