Export amba_bustype struct so it can be used for things like registering
bus notifiers.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

On some contemporary sub-micron SoCs, peripherals on the chip have
power domain switches, i.e. the voltage to the core may be turned
off to conserve power. In the Ux500 we have this for out PrimeCell
derivates.

This patch makes it possible to specify an (optional) regulator to
handle the voltage domain switch on AMBA PrimeCells, modeled very
similar to how block clocks are handled.

Additional amba_vcore_[enable|disable] calls are supplied to make
it possible introduce optional powering off of the core voltage.
Using this will require code to spool/unspool any core HW state.

Cc: Rabin Vincent <rabin.vincent@stericsson.com>
Cc: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Cc: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This make four macros for the PrimeCell ID register available to
drivers that use them witout using the PrimeCell/AMBA bus
abstraction and struct amba_device. It also moves the magic
PrimeCell CID "B105F00D" to the bus.h header file.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Some platforms gate the pclk (APB - the bus - clock) to the peripherals
for power saving, along with the functional clock.  When devices are
accessed without pclk enabled, the kernel will oops.

This gives them two options:

1. Leave all clocks on all the time.
2. Attempt to gate pclk along with the functional clock.

(With some hardware, pclk and the functional clock are gated by a single
bit in a register.)

(1) has the disadvantage that it causes increased power usage, which is
bad news for battery operated devices.  (2) can lead to kernel oops if
registers are accessed without the functional clock being enabled.

So, introduce the apb_pclk signal in such a way existing drivers don't
need to be updated.  Essentially, this means we guarantee that:

1. pclk will be enabled whenever the driver is bound to a device -
   from probe() to remove() time.
2. pclk will also be enabled when reading the primecell IDs from the device.

In order to allow drivers to be incrementally updated to achieve greater
power savings, we provide two additional calls to allow drivers to
manage the pclk - amba_pclk_enable()/amba_pclk_disable().
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This patch modifies the amba bus detection logic in the kernel
to detect the AMBA devices using the calculated resource
size information rather than the hard coded 4K size.

It also calculates the resource size when request mem region
and release mem region.
Signed-off-by: NLeo Chen <leochen@broadcom.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

AMBA device resources were being reported as:

10004000-10004fff : <BAD>

This is because dev_name() was returning NULL prior to device_register.
Ensure that the struct device is properly initialized, and the name is
set before adding it to the device tree.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>

arch/arm/mach-realview/platsmp.c:140: error: 'jiffies' undeclared (first use in this function)
drivers/amba/bus.c:246: error: 'NO_IRQ' undeclared (first use in this function)
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This changes the uevent buffer functions to use a struct instead of a
long list of parameters. It does no longer require the caller to do the
proper buffer termination and size accounting, which is currently wrong
in some places. It fixes a known bug where parts of the uevent
environment are overwritten because of wrong index calculations.

Many thanks to Mathieu Desnoyers for finding bugs and improving the
error handling.
Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Make use of add_uevent_var() instead of (often incorrectly) open coding it.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NEric Rannaud <eric.rannaud@gmail.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Fix driver model __must_check warnings in drivers/bus/amba.c by
rearranging how we add attributes to devices.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This is needed if we wish to change the size of the resource structures.

Based on an original patch from Vivek Goyal <vgoyal@in.ibm.com>

Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Many ARM drivers do not need to include asm/irq.h - remove this
unnecessary include from some ARM drivers.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Make the AMBA bus code visible to other architectures.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Since the ARM AMBA bus is used on MIPS as well as ARM, we need
to make the bus available for other architectures to use.  Move
the AMBA include files from include/asm-arm/hardware/ to
include/linux/amba/
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The first of these changes s/hotplug/uevent/ was needed to
compile sn2_defconfig (ia64/sn).  The other three files
changed are blind changes of all remaining bus_type.hotplug
references I could find to bus_type.uevent.

This patch attempts to finish similar changes made in the
gregkh-driver-kill-hotplug-word-from-driver-core Nov 22 patch.
Signed-off-by: NPaul Jackson <pj@sgi.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

I recently picked up my older work to remove unnecessary #includes of
sched.h, starting from a patch by Dave Jones to not include sched.h
from module.h. This reduces the number of indirect includes of sched.h
by ~300. Another ~400 pointless direct includes can be removed after
this disentangling (patch to follow later).
However, quite a few indirect includes need to be fixed up for this.

In order to feed the patches through -mm with as little disturbance as
possible, I've split out the fixes I accumulated up to now (complete for
i386 and x86_64, more archs to follow later) and post them before the real
patch.  This way this large part of the patch is kept simple with only
adding #includes, and all hunks are independent of each other.  So if any
hunk rejects or gets in the way of other patches, just drop it.  My scripts
will pick it up again in the next round.
Signed-off-by: NTim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NYani Ioannou <yani.ioannou@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!