This patch merges the platform driver support into the main body of
xilinx_spi.c in preparation for merging the OF and non-OF support
code.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Tested-by: NMichal Simek <monstr@monstr.eu>

The current code has the OF binding modifying the platform_data
pointer which it must not do, and the common code doesn't really need
to use a pdata pointer.  This patch eliminates the platform_data
references from the common part of the driver in preparation for
merging the OF and non-OF versions.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Tested-by: NMichal Simek <monstr@monstr.eu>

Move of_register_spi_devices() call from drivers to
spi_register_master(). Also change the function to use
the struct device_node pointer from master spi device
instead of passing it as function argument.
Signed-off-by: NAnatolij Gustschin <agust@denx.de>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

xilinx_spi presently makes some fairly questionable assumptions about I/O
routines, and attempts to assign ioread32/iowrite32 and friends directly
to its own internal function pointers. On many platforms these I/O
routines are macros or wrappers and not actual functions on their own,
resulting in things like:

ERROR: "ioread32be" [drivers/spi/xilinx_spi.ko] undefined!
ERROR: "iowrite32be" [drivers/spi/xilinx_spi.ko] undefined!
ERROR: "iowrite32" [drivers/spi/xilinx_spi.ko] undefined!
ERROR: "ioread32" [drivers/spi/xilinx_spi.ko] undefined!

If xilinx_spi wants to do this sort of casting, it needs to provide its
own wrappers for these, or change how it does accesses completely.

I've opted for the first approach, and the attached silly patch does
that. If someone with the hardware available wants to give the second
option a try that's ok too. In any event, the current code is broken for
at least: arm, avr32, blackfin, microblaze, mn10300, and sh.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
Acked-by: NRichard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch fixes the error exposed by the following build warning:

drivers/spi/xilinx_spi.c: In function 'xilinx_spi_init':
drivers/spi/xilinx_spi.c:411: warning: cast from pointer to integer
of different size

Fixed by change %x to %p in the format string.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch adds in support for the DS570 IP.

It's register compatible with the DS464, but adds support for 8/16/32 SPI.

The 8/16/32 support is added by attaching callbacks reading/writing the
proper amount of data. To indicate to the driver which amount of bits
to use a new field is introduced in the platform data struct.
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Tested-by: NJohn Linn <John.Linn@xilinx.com>
Signed-off-by: NRichard Röjfors <richard.rojfors@mocean-labs.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch changes the out_(be)(8|16|32) and in_(be)(8|16|32) calls to 32 bits ioread/iowrite.

The read and write function are attached to the internal struct as callbacks, callback
is selected depending on endianess.

This will also build on platforms not supporting the in/out calls for instance x86.
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Tested-by: NJohn Linn <John.Linn@xilinx.com>
Signed-off-by: NRichard Röjfors <richard.rojfors@mocean-labs.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch splits the xilinx_spi driver into a generic part and a
OF driver part.

The reason for this is to later add in a platform driver as well.
Tested-by: NJohn Linn <John.Linn@xilinx.com>
Signed-off-by: NRichard Röjfors <richard.rojfors@mocean-labs.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

The bits_per_word value can be set for each transfer, or can
be set to zero in each transfer in which case it should default
to the value in the driver.

The driver was fixed to properly check the bits_per_word in
the transfer that is passed in.
Signed-off-by: NJohn Linn <john.linn@xilinx.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Move some common spi_setup() error checks into the SPI framework from the
spi_master controller drivers:

 - Add a new "mode_bits" field to spi_master

 - Use that in spi_setup to validate the spi->mode value being
   requested.  Setting this new field is now mandatory for any
   controller supporting more than vanilla SPI_MODE_0.

 - Update all spi_master drivers to:

     * Initialize that field
     * Remove current spi_setup() checks using that value.

This is a net minor code shrink.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Start moving some spi_setup() functionality into the SPI core from the
various spi_master controller drivers:

 - Make that function stop being an inline;

 - Move two common idioms from drivers into that new function:
    * Default bits_per_word to 8 if that field isn't set
    * Issue a standardized dev_dbg() message

This is a net minor source code shrink, and supports enhancments found in
some follow-up patches.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The driver was not releasing memory when it was removed or
when there was a failure during probe. This fixes it.
Signed-off-by: NJohn Linn <john.linn@xilinx.com>
Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

The driver was updated to use the device tree rather than the platform data.
Signed-off-by: NJohn Linn <john.linn@xilinx.com>

xilinx_spi->irq is unsigned, so the test fails
Signed-off-by: NRoel Kluin <12o3l@tiscali.nl>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Andrei Konovalov <akonovalov@ru.mvista.com>
Cc: Yuri Frolov <yfrolov@ru.mvista.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Since 43cc71ee, the platform modalias is
prefixed with "platform:".  Add MODULE_ALIAS() to the hotpluggable SPI
platform drivers, to allow module auto loading.

[dbrownell@users.sourceforge.net: more drivers: registration fixes]
Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Update various SPI drivers so they properly support

  - coldplug through "modprobe $(cat /sys/devices/.../modalias)"

  - hotplug through "modprobe $(MODALIAS)"

The basic rule for platform, SPI, and (new style) I2C drivers is just
to make sure that modprobing the driver name works.  In this case, all
the relevant drivers are platform drivers, and this patch either

  (a)	Changes the driver name, if no in-tree code would break;
	this is simpler and thus preferable in the long term.

  (b)	Adds MODULE_ALIAS directives, when in-tree platforms declare
	devices using the current driver name; less desirable.

Most systems will link SPI controller drivers statically, but
there's no point in being needlessly broken.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Cc: Jean Delvare <khali@linux-fr.org>
Acked-by: NAndrei Konovalov <akonovalov@ru.mvista.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Simple SPI master driver for Xilinx SPI controller.
No support for multiple masters.
Not using level 1 drivers from EDK.

[akpm@linux-foundation.org: uninlining]
Signed-off-by: NYuri Frolov <yfrolov@ru.mvista.com>
Signed-off-by: NAndrei Konovalov <akonovalov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>