Merge branch 'for-next/misc'

drivers: explicitly select dependency STMP_DEVICE for i.MX23/28 drivers ...

Some of the i.MXs drivers can be build tested even if building for other
platforms. Support adding a future COMPILE_TEST dependency to some of
these drivers by explicitly having their Kconfig symbol select STMP_DEVICE
if the driver calls stmp_reset_block.

This has not been necessary for the normal build, because the ARCH
symbols for the IMX23 and IMX28 already selected STMP_DEVICE.

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

spi: Kconfig: drop unneeded dependency ...

The 'config DRIVER_SPI_MXS' section is already under 'if SPI'
so 'depends on SPI' is unneeded.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

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

spi: Add fsl-dspi driver ...

The fsl-dspi is found on Freescale Vybrid, Coldfire and Layerscape SoCs.
This adds the driver based on the Linux driver as of v5.5. Coldfire
support has been dropped as it's rather obsolete. Vybrid support has
been dropped because it needs the DMA engine support we do not have in
barebox. What's left is support for Layerscape where this driver has
been tested on.

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

spi: validate spi messages ...

This adds __spi_validate() to validate spi messages. This function is a
stripped down version from the Kernel. The motivation for adding this
was to fill in xfer->bits_per_word from spi->bits_per_word so that a
spi bus driver can use the former.

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

spi: add Zynq QSPI controller driver ...

This adds the driver for the QSPI controller found on
the Xilinx Zynq SoCs.

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

spi: fix symbol export for spi_register_controller ...

Fixes: 812a9ddcdf21 (spi: Generalize SPI "master" to "controller")
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: add atmel-quadspi support ...

This adds support for the Atmel quadspi device. Ported from Linux-5.2.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: at91: replace __raw_{readl, writel} of peripherals with readl, writel ...

Use the potentially endianness-changing readl, writel and siblings
directly. They looks prettier and are the correct thing to do, as
even if the CPU is in big-endian mode, the peripherals are little-endian.

Unlike Linux, barebox readl,writel are the same Linux'
{readl,writel}_relaxed (they don't imply memory barriers)
and thus there shouldn't be any functional change.

Patch was generated by a mass search and replace. I looked it over,
adjust some whitespace and further verified by reviewing the output of

	git diff HEAD~1 --word-diff | \
		perl -pe 's/\[-(.*?)__raw_/{+$1/; s/-\]\{\+/+}{+/;' \
		-e 's/(\{\+.*?\+\})\1/__ALL_IS_WELL__/' | grep '+}{+'

which filters out the common case of lines where a single
__raw_{readT,writeT} had its __raw_ prefix stripped without any
further changes.

Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: Kconfig: remove dependency list from Freescale QSPI controller ...

The dependency list for the Freescale QSPI controller doesn't match
the SoCs the hardware is in at all. Remove the dependency entirely as
the driver builds on all machines.

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

spi: add driver for Freescale QSPI controller ...

This is based on the Linux v5.1-rc1 driver introduced with the commit:

  commit 84d0431
  Refs: v5.0-rc1-1-g84d043185dbe
  Author:     Frieder Schrempf <frieder.schrempf@kontron.de>
  AuthorDate: Mon Jan 7 09:29:47 2019 +0000
  Commit:     Mark Brown <broonie@kernel.org>
  CommitDate: Mon Jan 7 16:56:24 2019 +0000

      spi: Add a driver for the Freescale/NXP QuadSPI controller

      This driver is derived from the SPI NOR driver at
      mtd/spi-nor/fsl-quadspi.c. It uses the new SPI memory interface
      of the SPI framework to issue flash memory operations to up to
      four connected flash chips (2 buses with 2 CS each).

      The controller does not support generic SPI messages.

      This patch also disables the build of the "old" driver and reuses
      its Kconfig option CONFIG_SPI_FSL_QUADSPI to replace it.

      Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
      Acked-by: Han Xu <han.xu@nxp.com>
      Reviewed-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
      Tested-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
      Tested-by: Han Xu <han.xu@nxp.com>
      Reviewed-by: Boris Brezillon <bbrezillon@kernel.org>
      Signed-off-by: Mark Brown <broonie@kernel.org>

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

spi: Extend the core to ease integration of SPI memory controllers ...

Sync with Linux v5.1-rc1.

This is the barebox adoption of the commit

  commit c36ff26
  Author: Boris Brezillon <boris.brezillon@bootlin.com>
  Date:   Thu Apr 26 18:18:14 2018 +0200

      spi: Extend the core to ease integration of SPI memory controllers

      Some controllers are exposing high-level interfaces to access various
      kind of SPI memories. Unfortunately they do not fit in the current
      spi_controller model and usually have drivers placed in
      drivers/mtd/spi-nor which are only supporting SPI NORs and not SPI
      memories in general.

      This is an attempt at defining a SPI memory interface which works for
      all kinds of SPI memories (NORs, NANDs, SRAMs).

      Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
      Reviewed-by: Frieder Schrempf <frieder.schrempf@exceet.de>
      Tested-by: Frieder Schrempf <frieder.schrempf@exceet.de>
      Signed-off-by: Mark Brown <broonie@kernel.org>

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

spi: Generalize SPI "master" to "controller" ...

Sync with Linux v5.1-rc1.

This is the barebox adoption of the commit

  commit 8caab75
  Author: Geert Uytterhoeven <geert+renesas@glider.be>
  Date:   Tue Jun 13 13:23:52 2017 +0200

      spi: Generalize SPI "master" to "controller"

      Now struct spi_master is used for both SPI master and slave controllers,
      it makes sense to rename it to struct spi_controller, and replace
      "master" by "controller" where appropriate.

      For now this conversion is done for SPI core infrastructure only.
      Wrappers are provided for backwards compatibility, until all SPI drivers
      have been converted.

      Noteworthy details:
	- SPI_MASTER_GPIO_SS is retained, as it only makes sense for SPI
	  master controllers,
	- spi_busnum_to_master() is retained, as it looks up masters only,
	- A new field spi_device.controller is added, but spi_device.master is
	  retained for compatibility (both are always initialized by
	  spi_alloc_device()),
	- spi_flash_read() is used by SPI masters only.

      Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
      Signed-off-by: Mark Brown <broonie@kernel.org>

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

spi: i.MX: Fix wrong bus nubering with devicetree ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: omap: make locally used functions static ...

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

Merge branch 'for-next/net-switch-mv88e6xxx'

ARM: at91: remove mach/io.h ...

Remove at91_sys_read() and at91_sys_write() since these are no longer
used. This makes mach/io.h empty so remove that aswell.

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

drivers: Introduce dev_set_name() ...

Introduce dev_set_name() in order to hide implementation details of
setting device's name so it'd be easier to change it.

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

spi: atmel_spi: fix duplicate const warning ...

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i.MX: Select DRIVER_SPI_IMX_2_3 for i.MX8MQ ...

Select DRIVER_SPI_IMX_2_3 for i.MX8MQ since that is the variant that's
being used

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

i.MX: Select DRIVER_SPI_IMX_2_3 for i.MX7 ...

Select DRIVER_SPI_IMX_2_3 for i.MX7 since that is the variant that's
being used.

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

i.MX: ecspi: Enable imx->clk as a part of initialization ...

Some SoCs (e. g. i.MX7) do not enable this clock by default, so add
code to take care of that in the driver.

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

spi: imx: make xchg_single timeout value compatible for older boards ...

A call of xchg_single will issue the transfer of 24 data bits with a given
maximum frequency. Since there exist some i.MX based boards with
spi-max-frequency = <100000>, change the xchg_single timeout to still
support those boards.

Fixes: 1439cdf7c6fc ("spi: imx: add timeout to xchg_single")
Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: imx: add timeout to xchg_single ...

If there is a problem STAT_RR might never be set which results in an endless loop.
Break out after 10 µs with -ETIMEOUT instead.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

spi: imx: add error checking ...

This makes it possible that the xchg_single callbacks return an error code that
is then passed to the caller of spi_transfer. There is no change in behaviour
intended as up to now the callbacks always return 0.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

of: use of_property_read_bool where appropriate ...

Use of_property_read_bool where boolean properties are read.

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

spi: atmel_spi: Add DT support ...

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: atmel_spi: Use VERSION register instead of CPU type ...

Use VERSION register instead of CPU type to determine IP block's version
and capabilities. This what corresponding Linux kernel driver does.

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

spi: atmel_spi: Configure CS GPIO as output ...

On AT91 GPIOs default to being inputs, so we need to explicitly
configure CS gpio to being an output.

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