MIPS: Allow modules to set board_be_handler

After making the brcmstb_gisb driver modular with 707a4cdf86e5 ("bus:
brcmstb_gisb: Allow building as module") Guenter reported that mips
allmodconfig failed to link because board_be_handler was referenced.

Thomas indicated that if we were to continue making the brcmstb_gisb
driver modular for MIPS we would need to introduce a function that
allows setting the board_be_handler and export that function towards
modules.

This is what is being done here: board_be_handler is made static and is
now settable with a mips_set_be_handler() function which is exported.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Suggested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Fixes: 707a4cdf86e5 ("bus: brcmstb_gisb: Allow building as module")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: txx9: Move the ndfc.h header to include/linux/platform_data/txx9

This way we will be able to compile the ndfmc driver when
COMPILE_TEST=y.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Acked-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

MIPS: TXx9: Modernize printing of kernel messages

- Convert from printk() to pr_*(),
- Add missing continuations, to fix user-visible breakage,
- Drop superfluous casts (u64 has been unsigned long long on all
architectures for many years).

On rbtx4927, this restores the kernel output like:

-TX4927 SDRAMC --
- CR0:0000007e00000544
- TR:32800030e
+TX4927 SDRAMC -- CR0:0000007e00000544 TR:32800030e

and:

-PCIC -- PCICLK:
-Internal(33.3MHz)
-
+PCIC -- PCICLK:Internal(33.3MHz)

Fixes: 4bcc595ccd80decb ("printk: reinstate KERN_CONT for printing continuation lines")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14646/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: tx49xx: Move GPIO setup from .mem_setup() to .arch_init()

txx9_gpio_init() calls gpiochip_add_data(), which fails with -ENOMEM as
it is called too early in the boot process. This causes all subsequent
GPIO operations to fail silently (before commit 54d77198fdfbc4f0 ("gpio:
bail out silently on NULL descriptors") it printed the error message
"gpiod_direction_output_raw: invalid GPIO" on RBTX49[23]7).

Postpone all GPIO setup to .arch_init() time to fix this.

Suggested-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-mips@linux-mips.org
Cc: linux-gpio@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14237/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

mips: Convert pr_warning to pr_warn

Use the much more common pr_warn instead of pr_warning
with the goal of removing pr_warning eventually.

Other miscellanea:

o Coalesce formats
o Realign arguments

Signed-off-by: Joe Perches <joe@perches.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Patchwork: https://patchwork.linux-mips.org/patch/7935/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Whitespace cleanup.

Having received another series of whitespace patches I decided to do this
once and for all rather than dealing with this kind of patches trickling
in forever.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Add SRAMC support

Add a sysdev to access SRAM in TXx9 SoCs via sysfs.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Add ACLC support

Add platform support for ACLC of TXx9 SoCs.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Add DMAC support

Add platform support for DMAC of TXx9 SoCs.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Fix possible overflow in clock calculations

Addition of -fwrapv option in 2.6.29 discloses possible overflow with
signed arithmetics. For example, result of "a * 6 / 12" (int a =
400000000) is 200000000 without -fwrapv but -157913941 with -fwrapv.

Change some variable to unsigned to avoid such overflows.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

[MTD] [NAND] TXx9: add NDFMC support

Add platform support for NAND Flash Memory Controller of TXx9 SoCs.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-By: Ralf Bächle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

TXx9: Add TX4938 ATA support (v3)

Add a helper routine to register tx4938ide driver and use it on
RBTX4938 board.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

MIPS: TXx9: stop_unused_modules

TXx9 SoCs have pin multiplex. Stop some controller modules which can
not be used due to pin configurations.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Add board_be_init for TX4927/TX4938

Setup default board_be_handler for TX4927/TX4938.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Default machine_restart using watchdog reset

Add default machine_restart routine using watchdog reset of TX4927 and
TX4938.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Add mtd support

Add helper routines to register physmap-flash platform devices for NOR
flashes.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: TXx9: Cache fixup

TX39/TX49 can enable/disable I/D cache at runtime. Add kernel options
to control them. This is useful to debug some cache-related issues,
such as aliasing or I/D coherency. Also enable CWF bit for TX49 SoCs.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

[MIPS] TXx9: Unify serial_txx9 setup

* Unify calling of early_serial_txx9_setup.
* Use dedicated serial clock on RBTX4938.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

[MIPS] TXx9: Make tx4938-specific code more independent

Make some TX4938 SoC specific code independent from board specific code.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

[MIPS] TXx9: Cleanup watchdog

Unify registration of txx9wdt platform device.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

[MIPS] TXx9: Add 64-bit support

SYS_SUPPORTS_64BIT_KERNEL is enabled for RBTX4927/RBTX4938, but
actually it was broken for long time (or from the beginning). Now it
should work.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>