linux-stable.git/arch/microblaze/kernel/intc.c, branch v3.3

microblaze: Change NO_IRQ to 0

2012-01-05T07:29:13+00:00

As has been discussed many times[1], Using NO_IRQ set to anything other
than 0 is bug waiting to happen since many drivers follow the pattern
"if (!irq)" for testing whether or not an irq has been set.

This patch changes the Microblaze NO_IRQ setting from -1 to 0 to bring
it in line with most of the rest of the kernel.  It also prepares for
Microblaze eventually supporting multiple interrupt controllers by
breaking the assumption that hwirq# == Linux IRQ#.  The Linux IRQ
number is just a cookie with no guarantee of a direct relationship
with the hardware irq arrangement.

At this point, Microblaze interrupt handling only supports only one
instance of one kind of interrupt controller (xilinx_intc).  This change
shouldn't affect any architecture code outside of the interrupt
controller driver and the irq_of mapping.

Updated to 3.2 and to use irq_data.hwirq by Rob Herring.
Tested and fixed by Michal Simek.

[1] http://lkml.org/lkml/2005/11/21/221

Signed-off-by: Grant Likely 
Signed-off-by: Rob Herring 
Signed-off-by: Michal Simek

microblaze: intc: Change variable name

2012-01-05T07:22:02+00:00

intr_type is mask - change name.
s/intr_type/intr_mask/g

Signed-off-by: Michal Simek

microblaze: Use of_find_compatible_node for timer and intc

2012-01-05T07:22:01+00:00

Calling of_find_compatible_node instead of calling private code
which does the same.

Signed-off-by: Michal Simek

microblaze: Do not show error message for 32 interrupt lines

2011-07-27T09:02:00+00:00

When interrupt controller uses 32 interrupts lines the kernel
show error message about mismatch in kind-of-intr parameter
because it exceeds u32. Recast fixs this issue.

Signed-off-by: Michal Simek

microblaze: Fix level/edge irq sensibility

2011-04-01T07:25:04+00:00

Patches:
"microblaze: Convert to new irq function names"
sha (4adc192ec7d977c74c750320f289af9d61c1caca)
and
"microblaze: Use generic show_interrupts()"
sha(9d61c18b25726306c9231428c17db42e3ff29ba7)

should also setup edge/level in irq_set_chip_and_handler_name
name parameter.

Error log:
~ # cat /proc/interrupts
           CPU0
  2:          2  Xilinx INTC-Xilinx INTC  eth0
  3:          2  Xilinx INTC-Xilinx INTC  eth0
  4:        241  Xilinx INTC-Xilinx INTC  timer
  6:        108  Xilinx INTC-Xilinx INTC  serial

Fixed:
~ # cat /proc/interrupts
           CPU0
  2:          2  Xilinx INTC-level     eth0
  3:          2  Xilinx INTC-level     eth0
  4:        238  Xilinx INTC-edge      timer
  6:        108  Xilinx INTC-level     serial

Signed-off-by: Michal Simek 
Acked-by: Thomas Gleixner 

---

v2: Fix exchanged edge and level

microblaze: Convert to new irq function names

2011-03-29T12:48:06+00:00

Namespace conversion scripted with coccinelle.

Also retrieve the irq type from irq_data in intc_enable_or_unmask()

Signed-off-by: Thomas Gleixner

microblaze: Convert irq_chip to new functions

2011-03-09T07:09:59+00:00

Use proper irq_desc wrappers while at it.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Michal Simek

microblaze: Remove stale irq_chip.end

2011-03-09T07:09:59+00:00

irq_chip.end got obsolete with the removal of __do_IRQ().

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Tested-by: Michal Simek 
LKML-Reference: <20110203004210.240154507@linutronix.de>

microblaze: Add support for little-endian Microblaze

2010-10-21T05:51:59+00:00

Microblaze little-endian toolchain exports __MICROBLAZEEL__
which is used in the kernel to identify little/big endian.

The most of the changes are in loading values from DTB which
is always big endian.

Little endian platforms are based on new AXI bus which has
impact to early uartlite initialization.

Signed-off-by: Michal Simek

microblaze: Remove additional compatible properties

2010-10-21T05:51:47+00:00

Device-tree BSP generates longer compatible properties
that's why we can remove extra/old one.

Signed-off-by: Michal Simek