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r: 143582
b: refs/heads/master
c: c917c1d
h: refs/heads/master
v: v3
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Russell King authored and Russell King committed Apr 17, 2009
1 parent eff42a3 commit 71d4fb8
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2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 0c3ee078251b85812e585b5cf5d1635afd73f4e2
refs/heads/master: c917c1d0151667768d22fb96d083a11e3dac5f36
19 changes: 6 additions & 13 deletions trunk/Documentation/block/biodoc.txt
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Expand Up @@ -1040,23 +1040,21 @@ Front merges are handled by the binary trees in AS and deadline schedulers.
iii. Plugging the queue to batch requests in anticipation of opportunities for
merge/sort optimizations

This is just the same as in 2.4 so far, though per-device unplugging
support is anticipated for 2.5. Also with a priority-based i/o scheduler,
such decisions could be based on request priorities.

Plugging is an approach that the current i/o scheduling algorithm resorts to so
that it collects up enough requests in the queue to be able to take
advantage of the sorting/merging logic in the elevator. If the
queue is empty when a request comes in, then it plugs the request queue
(sort of like plugging the bottom of a vessel to get fluid to build up)
(sort of like plugging the bath tub of a vessel to get fluid to build up)
till it fills up with a few more requests, before starting to service
the requests. This provides an opportunity to merge/sort the requests before
passing them down to the device. There are various conditions when the queue is
unplugged (to open up the flow again), either through a scheduled task or
could be on demand. For example wait_on_buffer sets the unplugging going
(by running tq_disk) so the read gets satisfied soon. So in the read case,
the queue gets explicitly unplugged as part of waiting for completion,
in fact all queues get unplugged as a side-effect.
through sync_buffer() running blk_run_address_space(mapping). Or the caller
can do it explicity through blk_unplug(bdev). So in the read case,
the queue gets explicitly unplugged as part of waiting for completion on that
buffer. For page driven IO, the address space ->sync_page() takes care of
doing the blk_run_address_space().

Aside:
This is kind of controversial territory, as it's not clear if plugging is
Expand All @@ -1067,11 +1065,6 @@ Aside:
multi-page bios being queued in one shot, we may not need to wait to merge
a big request from the broken up pieces coming by.

Per-queue granularity unplugging (still a Todo) may help reduce some of the
concerns with just a single tq_disk flush approach. Something like
blk_kick_queue() to unplug a specific queue (right away ?)
or optionally, all queues, is in the plan.

4.4 I/O contexts
I/O contexts provide a dynamically allocated per process data area. They may
be used in I/O schedulers, and in the block layer (could be used for IO statis,
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46 changes: 31 additions & 15 deletions trunk/Documentation/powerpc/dts-bindings/fsl/i2c.txt
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Expand Up @@ -7,26 +7,42 @@ Required properties :

Recommended properties :

- compatible : Should be "fsl-i2c" for parts compatible with
Freescale I2C specifications.
- compatible : compatibility list with 2 entries, the first should
be "fsl,CHIP-i2c" where CHIP is the name of a compatible processor,
e.g. mpc8313, mpc8543, mpc8544, mpc5200 or mpc5200b. The second one
should be "fsl-i2c".
- interrupts : <a b> where a is the interrupt number and b is a
field that represents an encoding of the sense and level
information for the interrupt. This should be encoded based on
the information in section 2) depending on the type of interrupt
controller you have.
- interrupt-parent : the phandle for the interrupt controller that
services interrupts for this device.
- dfsrr : boolean; if defined, indicates that this I2C device has
a digital filter sampling rate register
- fsl5200-clocking : boolean; if defined, indicated that this device
uses the FSL 5200 clocking mechanism.

Example :
i2c@3000 {
interrupt-parent = <40000>;
interrupts = <1b 3>;
reg = <3000 18>;
device_type = "i2c";
compatible = "fsl-i2c";
dfsrr;
- fsl,preserve-clocking : boolean; if defined, the clock settings
from the bootloader are preserved (not touched).
- clock-frequency : desired I2C bus clock frequency in Hz.

Examples :

i2c@3d00 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c";
cell-index = <0>;
reg = <0x3d00 0x40>;
interrupts = <2 15 0>;
interrupt-parent = <&mpc5200_pic>;
fsl,preserve-clocking;
};

i2c@3100 {
#address-cells = <1>;
#size-cells = <0>;
cell-index = <1>;
compatible = "fsl,mpc8544-i2c", "fsl-i2c";
reg = <0x3100 0x100>;
interrupts = <43 2>;
interrupt-parent = <&mpic>;
clock-frequency = <400000>;
};

4 changes: 2 additions & 2 deletions trunk/Documentation/sound/alsa/HD-Audio.txt
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Expand Up @@ -169,15 +169,15 @@ PCI SSID look-up.
What `model` option values are available depends on the codec chip.
Check your codec chip from the codec proc file (see "Codec Proc-File"
section below). It will show the vendor/product name of your codec
chip. Then, see Documentation/sound/alsa/HD-Audio-Modelstxt file,
chip. Then, see Documentation/sound/alsa/HD-Audio-Models.txt file,
the section of HD-audio driver. You can find a list of codecs
and `model` options belonging to each codec. For example, for Realtek
ALC262 codec chip, pass `model=ultra` for devices that are compatible
with Samsung Q1 Ultra.

Thus, the first thing you can do for any brand-new, unsupported and
non-working HD-audio hardware is to check HD-audio codec and several
different `model` option values. If you have a luck, some of them
different `model` option values. If you have any luck, some of them
might suit with your device well.

Some codecs such as ALC880 have a special model option `model=test`.
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71 changes: 63 additions & 8 deletions trunk/MAINTAINERS
Original file line number Diff line number Diff line change
Expand Up @@ -543,6 +543,14 @@ S: Maintained
F: arch/arm/lib/floppydma.S
F: arch/arm/include/asm/floppy.h

ARM PORT
P: Russell King
M: linux@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.arm.linux.org.uk/
S: Maintained
F: arch/arm/

ARM PRIMECELL MMCI PL180/1 DRIVER
S: Orphan
F: drivers/mmc/host/mmci.*
Expand Down Expand Up @@ -592,6 +600,13 @@ M: kernel@wantstofly.org
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
S: Maintained

ARM/CLKDEV SUPPORT
P: Russell King
M: linux@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
F: arch/arm/common/clkdev.c
F: arch/arm/include/asm/clkdev.h

ARM/COMPULAB CM-X270/EM-X270 and CM-X300 MACHINE SUPPORT
P: Mike Rapoport
M: mike@compulab.co.il
Expand All @@ -610,6 +625,15 @@ L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
T: git git://gitorious.org/linux-gemini/mainline.git
S: Maintained

ARM/EBSA110 MACHINE SUPPORT
P: Russell King
M: linux@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.arm.linux.org.uk/
S: Maintained
F: arch/arm/mach-ebsa110/
F: drivers/net/arm/am79c961a.*

ARM/EZX SMARTPHONES (A780, A910, A1200, E680, ROKR E2 and ROKR E6)
P: Daniel Ribeiro
M: drwyrm@gmail.com
Expand All @@ -627,6 +651,15 @@ M: paulius.zaleckas@teltonika.lt
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
S: Maintained

ARM/FOOTBRIDGE ARCHITECTURE
P: Russell King
M: linux@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.arm.linux.org.uk/
S: Maintained
F: arch/arm/include/asm/hardware/dec21285.h
F: arch/arm/mach-footbridge/

ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
P: Sascha Hauer
M: kernel@pengutronix.de
Expand Down Expand Up @@ -767,19 +800,27 @@ M: kernel@wantstofly.org
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
S: Maintained

ARM/RISCPC ARCHITECTURE
P: Russell King
M: linux@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.arm.linux.org.uk/
S: Maintained
F: arch/arm/common/time-acorn.c
F: arch/arm/include/asm/hardware/entry-macro-iomd.S
F: arch/arm/include/asm/hardware/ioc.h
F: arch/arm/include/asm/hardware/iomd.h
F: arch/arm/include/asm/hardware/memc.h
F: arch/arm/mach-rpc/
F: drivers/net/arm/ether*
F: drivers/scsi/arm/

ARM/SHARK MACHINE SUPPORT
P: Alexander Schulz
M: alex@shark-linux.de
W: http://www.shark-linux.de/shark.html
S: Maintained

ARM/STRONGARM110 PORT
P: Russell King
M: rmk@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.arm.linux.org.uk/
S: Maintained

ARM/S3C2410 ARM ARCHITECTURE
P: Ben Dooks
M: ben-linux@fluff.org
Expand Down Expand Up @@ -813,6 +854,14 @@ L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.mcuos.com
S: Maintained

ARM/VFP SUPPORT
P: Russell King
M: linux@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.arm.linux.org.uk/
S: Maintained
F: arch/arm/vfp/

ARPD SUPPORT
P: Jonathan Layes
L: netdev@vger.kernel.org
Expand Down Expand Up @@ -1372,6 +1421,11 @@ S: Maintained
F: Documentation/input/cs461x.txt
F: sound/pci/cs46xx/

CLK API
P: Russell King
M: linux@arm.linux.org.uk
F: include/linux/clk.h

CODA FILE SYSTEM
P: Jan Harkes
M: jaharkes@cs.cmu.edu
Expand Down Expand Up @@ -1576,7 +1630,8 @@ F: drivers/infiniband/hw/cxgb3/

CYBERPRO FB DRIVER
P: Russell King
M: rmk@arm.linux.org.uk
M: linux@arm.linux.org.uk
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
W: http://www.arm.linux.org.uk/
S: Maintained
F: drivers/video/cyber2000fb.*
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9 changes: 4 additions & 5 deletions trunk/arch/arm/common/vic.c
Original file line number Diff line number Diff line change
Expand Up @@ -85,12 +85,11 @@ void __init vic_init(void __iomem *base, unsigned int irq_start,
writel(32, base + VIC_PL190_DEF_VECT_ADDR);

for (i = 0; i < 32; i++) {
unsigned int irq = irq_start + i;

set_irq_chip(irq, &vic_chip);
set_irq_chip_data(irq, base);

if (vic_sources & (1 << i)) {
unsigned int irq = irq_start + i;

set_irq_chip(irq, &vic_chip);
set_irq_chip_data(irq, base);
set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
Expand Down
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