firmware: drop the imx subdir ...

We don't intend to ship any files in this directory, so there is no
risk of the directory getting too crowded over time. Drop the subdir
as this makes it easier for a outer build system to drop all the
needed firmwares into the correct directory.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

firmware: add a note about license implications ...

Building additional firmware into the boot image has some license
implications, which should be considered by the user, so add a short
note about this.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

firmware: imx: remove prebuilt ATF binary ...

The prebuilt ATF binary is in fact a license compliance issue. While
the used BSD-3-clause license allows aggregation with the Barebox
binary, the chosen license requires us to ship the license text
itself for the source distribution and also for the binary form if
the built boot image contains the ATF binary.

As this is a restriction that only applies to some boot images,
depending on the Barebox configuration, it's non-trivial to do
proper license compliance from within the Barebox source.

Remove the prebuilt binary and rely on the external build system
or user to provide the correct binary. Most system build systems
already provide a proper way to handle the license dependency
issue.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Documentation: imx8mq-evk: add instructions for HDMITX firmware ...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Documentation: imx8mq-evk: point to current version of the firmware ...

There were some updates to the i.MX8MQ DDR training firmware, so better
point to the current version.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

PCI: imx6: Port imx6_pcie_ltssm_enable() ...

Port imx6_pcie_ltssm_enable() from Linux kernel driver.

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

PCI: imx6: Drop unnecessary root_bus_nr setting ...

Port of a Linux commit 39f712e

  Function dw_pcie_host_init() already initializes the root_bus_nr field
  of 'struct pcie_port', so the -1 assignment prior to calling
  dw_pcie_host_init() in platform specific driver is not really needed.
  Drop it.

  Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
  Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
  Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  Cc: Richard Zhu <hongxing.zhu@nxp.com>
  Cc: Lucas Stach <l.stach@pengutronix.de>

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

PCI: imx6: Fix spelling mistake: "contol" -> "control" ...

Port of a Linux commit 7221547

  Trivial fix to spelling mistake in dev_err message

  Signed-off-by: Colin Ian King <colin.king@canonical.com>
  Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
  Acked-by: Richard Zhu <hongxing.Zhu@nxp.com>

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

PCI: imx6: Do not switch speed if Gen2 is disabled ...

Port of a Linux commit 93b226f

  Save a bit of time and avoid going through link speed change procedure in
  configuration where link max speed is limited to Gen1 in DT.

  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
  Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  Cc: yurovsky@gmail.com
  Cc: Fabio Estevam <fabio.estevam@nxp.com>
  Cc: Dong Aisheng <dongas86@gmail.com>
  Cc: linux-arm-kernel@lists.infradead.org

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

PCI: imx6: Do not wait for speed change on i.MX7 ...

Port of a Linux commit e6dcd87

  As can be seen from [1]:

    "...the different behavior between iMX6Q PCIe and iMX7D PCIe maybe caused
    by the different controller version.

    Regarding to the DOC description, the DIRECT_SPEED_CHANGE should be
    cleared after the speed change from GEN1 to GEN2. Unfortunately, when
    GEN1 device is used, the behavior is not documented.

    So, IC design guys run the simulation and find out the following
    behaviors:

       1. DIRECT_SPEED_CHANGE will be cleared in 7D after speed change
          from GEN1 to GEN2. This matches doc’s description

       2. set MAX link speed(PCIE_CAP_TARGET_LINK_SPEED=0x01) as GEN1 and
          re-run the simulation, DIRECT_SPEED_CHANGE will not be cleared;
          remain as 1, this matches your result, but function test is
          passed, so this bit should not affect the normal PCIe function."

  imx6_pcie_wait_for_speed_change() will report false failures for Gen1 ->
  Gen1 speed transition, so avoid doing that check and just rely on
  imx6_pcie_wait_for_link() only.

  [1] https://community.nxp.com/message/867943

  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
  Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  Cc: yurovsky@gmail.com
  Cc: Fabio Estevam <fabio.estevam@nxp.com>
  Cc: Dong Aisheng <dongas86@gmail.com>
  Cc: linux-arm-kernel@lists.infradead.org

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

PCI: imx6: Allow probe deferral by reset GPIO ...

Port of a Linux commit bde4a5a

  Some designs implement reset GPIO via a GPIO expander connected to a
  peripheral bus.  One such example would be i.MX7 Sabre board where said
  GPIO is provided by SPI shift register connected to a bitbanged SPI bus.
  To support such designs, allow reset GPIO request to defer probing of the
  driver.

  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
  Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  Cc: yurovsky@gmail.com
  Cc: Fabio Estevam <fabio.estevam@nxp.com>
  Cc: Dong Aisheng <dongas86@gmail.com>
  Cc: linux-arm-kernel@lists.infradead.org

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

PCI: imx6: Add code to support i.MX7D ...

Port of a Linux commit 9b3fe67

  Add various bits of code needed to support i.MX7D variant of the IP.

  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
  Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  Acked-by: Lee Jones <lee.jones@linaro.org>
  Acked-by: Rob Herring <robh@kernel.org>
  Cc: yurovsky@gmail.com
  Cc: Mark Rutland <mark.rutland@arm.com>
  Cc: Fabio Estevam <fabio.estevam@nxp.com>
  Cc: Dong Aisheng <dongas86@gmail.com>
  Cc: linux-arm-kernel@lists.infradead.org
  Cc: devicetree@vger.kernel.org

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

reset: Mark local functions as static ...

There are no outside users of of_reset_control_get() or
gpio_reset_control_get(), so mark them as static. This allows us to
avoid "no previous prototype" warning as well.

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

reset: Add i.MX7 SRC reset driver ...

Port of a Linux commit abf9775

  Add reset controller driver exposing various reset faculties,
  implemented by System Reset Controller IP block.

  Cc: Lucas Stach <l.stach@pengutronix.de>
  Cc: Mark Rutland <mark.rutland@arm.com>
  Cc: devicetree@vger.kernel.org
  Cc: linux-kernel@vger.kernel.org
  Cc: linux-arm-kernel@lists.infradead.org
  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Acked-by: Rob Herring <robh@kernel.org>
  Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Linux commit 26fce05 was squashed
here as well:

  reset: imx7: Fix always writing bits as 0

  Right now the only user of reset-imx7 is pci-imx6 and the
  reset_control_assert and deassert calls on pciephy_reset don't toggle
  the PCIEPHY_BTN and PCIEPHY_G_RST bits as expected. Fix this by writing
  1 or 0 respectively.

  The reference manual is not very clear regarding SRC_PCIEPHY_RCR but for
  other registers like MIPIPHY and HSICPHY the bits are explicitly
  documented as "1 means assert, 0 means deassert".

  The values are still reversed for IMX7_RESET_PCIE_CTRL_APPS_EN.

  Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
  Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

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

soc: imx: Add GPCv2 power gating driver ...

Port of a Linux commit 03aa126

  Add code allowing for control of various power domains managed by GPCv2
  IP block found in i.MX7 series of SoCs. Power domains covered by this
  patch are:

      - PCIE PHY
      - MIPI PHY
      - USB HSIC PHY
      - USB OTG1/2 PHY

  Support for any other power domain controlled by GPC is not present, and
  can be added at some later point.

  Testing of this code was done against a PCIe driver.

  Cc: yurovsky@gmail.com
  Cc: Lucas Stach <l.stach@pengutronix.de>
  Cc: Fabio Estevam <fabio.estevam@nxp.com>
  Cc: Dong Aisheng <dongas86@gmail.com>
  Cc: linux-arm-kernel@lists.infradead.org
  Cc: linux-kernel@vger.kernel.org
  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Linux commit 9e01e2d was squashed
here as well:

  soc: imx: gpcv2: fix regulator deferred probe

  If a regulator requests a deferred probe, the power domain gets
  initialized twice. This leads to a list double add (without
  list debugging the kernel hangs due to the double add later):

    WARNING: CPU: 0 PID: 19 at lib/list_debug.c:31 __list_add_valid+0xbc/0xc4
    list_add double add: new=c1229754, prev=c12383b4, next=c1229754.

  Initialize the power domain after we get the regulator. Also do
  not print an error in case the regulator defers probing.

  Cc: Fabio Estevam <fabio.estevam@nxp.com>
  Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
  Cc: linux-arm-kernel@lists.infradead.org
  Cc: linux-kernel@vger.kernel.org
  Fixes: 03aa12629fc4 ("soc: imx: Add GPCv2 power gating driver")
  Signed-off-by: Stefan Agner <stefan@agner.ch>
  Acked-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Tested-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Linux commit 3637f12 was squashed
here as well

  soc: imx: gpcv2: correct PGC offset

  Correct MIPI/PCIe/USB_HSIC's PGC offset based on
  design RTL, the values in the Reference Manual
  (Rev. 1, 01/2018 and the older ones) are incorrect.

  The correct offset values should be as below:

  0x800 ~ 0x83F: PGC for core0 of A7 platform;
  0x840 ~ 0x87F: PGC for core1 of A7 platform;
  0x880 ~ 0x8BF: PGC for SCU of A7 platform;
  0xA00 ~ 0xA3F: PGC for fastmix/megamix;
  0xC00 ~ 0xC3F: PGC for MIPI PHY;
  0xC40 ~ 0xC7F: PGC for PCIe_PHY;
  0xC80 ~ 0xCBF: PGC for USB OTG1 PHY;
  0xCC0 ~ 0xCFF: PGC for USB OTG2 PHY;
  0xD00 ~ 0xD3F: PGC for USB HSIC PHY;

  Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
  Fixes: 03aa12629fc4 ("soc: imx: Add GPCv2 power gating driver")
  Acked-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
  Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

drivers: base: Port power management code from Linux ...

Port an extremely abridged version of power management/power domain
code from Linux as a dependency of i.MX7D PCIe work. Currenlty only
bare minimum of functionality is implemented.

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

regulator: Port ANATOP driver from Linux ...

Port a subset of Linux driver sufficient enough to support feature
needed for PCIe on i.MX7.

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

regulator: Assume probe deferral instead of missing regulator ...

Don't report requested regulator (via of_regulator_get()) as
non-existent if said regulator is missing from regulator list. Instead
report it as probe deferral to give other, unprobed, drivers a chance
to resolve this.

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

base: driver: Drop redundant list_empty() check ...

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

regulator: Add support for setting regulator's voltage ...

Add code needed to implement regulator_set_voltage(). Currently only
bare minmum needed for ANATOP driver (added in follow up commit) is
supported.

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

regulator: Port basic regmap regulator functions ...

In order to be able to port Linux driver relying on this API, port
various regmap related regulator function to Barebox.

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

regulator: Convert drivers to use struct regulator_desc ...

To simplify porting kernel code, port a very basic struct
regulator_desc and convert all of the code to use it.

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

ARM: imx: add support for Udoo Neo full ...

Original patch from Uwe Kleine-König, I fixed the
review comments and the imxcfg file to use the udoo neo values.

I also tested the support on the udoo neo full board.

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

images: check for use of obsolete pblx-* ...

pblx-* has been removed in 5a1a5ed253 ("ARM: images: use piggydata")
and using it (e.g. because a patchset was rebased) results in a non-obvious:

	make[1]: *** No rule to make target 'images/*.pblx.*', \
	needed by 'images/barebox-*.img'.  Stop.

Avoid this by explicitly failing with an error message whenever pblx-y
or pblx- has been defined.

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

images: pblx is now pblb ...

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

images: Drop unnecessary fix_size ...

Now that we compile the compressed binary into the decompressor we
no longer need fix_size but can use the linker to fill in the image
size into the binary.

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

ARM: imx8mq: Add back memory controller node ...

This was lost during conversion to use upstream device tree.

Fixes: 29841dfa4b ("ARM: imx8mq: use upstream devicetree")

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

Merge branch 'for-next/ultrascale'

Merge branch 'for-next/risc-V'

Merge branch 'for-next/pci'