---

yaml
---
r: 326880
b: refs/heads/master
c: 84bae6c
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cc7887c3b1a08d3900160d93df4ddda5fa7f725b
+refs/heads/master: 84bae6c379e362aa017efd417199f51d5c2273ac

trunk/Documentation/ABI/testing/sysfs-bus-pci

@@ -210,3 +210,15 @@ Users:
 		firmware assigned instance number of the PCI
 		device that can help in understanding the firmware
 		intended order of the PCI device.
+
+What:		/sys/bus/pci/devices/.../d3cold_allowed
+Date:		July 2012
+Contact:	Huang Ying <ying.huang@intel.com>
+Description:
+		d3cold_allowed is bit to control whether the corresponding PCI
+		device can be put into D3Cold state.  If it is cleared, the
+		device will never be put into D3Cold state.  If it is set, the
+		device may be put into D3Cold state if other requirements are
+		satisfied too.  Reading this attribute will show the current
+		value of d3cold_allowed bit.  Writing this attribute will set
+		the value of d3cold_allowed bit.

trunk/Documentation/ABI/testing/sysfs-tty

@@ -17,3 +17,12 @@ Description:
 		 device, like 'tty1'.
 		 The file supports poll() to detect virtual
 		 console switches.
+
+What:		/sys/class/tty/ttyS0/uartclk
+Date:		Sep 2012
+Contact:	Tomas Hlavacek <tmshlvck@gmail.com>
+Description:
+		 Shows the current uartclk value associated with the
+		 UART port in serial_core, that is bound to TTY like ttyS0.
+		 uartclk = 16 * baud_base
+

trunk/Documentation/block/00-INDEX

@@ -3,15 +3,21 @@
 biodoc.txt
 	- Notes on the Generic Block Layer Rewrite in Linux 2.5
 capability.txt
-	- Generic Block Device Capability (/sys/block/<disk>/capability)
+	- Generic Block Device Capability (/sys/block/<device>/capability)
+cfq-iosched.txt
+	- CFQ IO scheduler tunables
+data-integrity.txt
+	- Block data integrity
 deadline-iosched.txt
 	- Deadline IO scheduler tunables
 ioprio.txt
 	- Block io priorities (in CFQ scheduler)
+queue-sysfs.txt
+	- Queue's sysfs entries
 request.txt
 	- The members of struct request (in include/linux/blkdev.h)
 stat.txt
-	- Block layer statistics in /sys/block/<dev>/stat
+	- Block layer statistics in /sys/block/<device>/stat
 switching-sched.txt
 	- Switching I/O schedulers at runtime
 writeback_cache_control.txt

trunk/Documentation/block/cfq-iosched.txt

@@ -1,3 +1,14 @@
+CFQ (Complete Fairness Queueing)
+===============================
+
+The main aim of CFQ scheduler is to provide a fair allocation of the disk
+I/O bandwidth for all the processes which requests an I/O operation.
+
+CFQ maintains the per process queue for the processes which request I/O
+operation(syncronous requests). In case of asynchronous requests, all the
+requests from all the processes are batched together according to their
+process's I/O priority.
+
 CFQ ioscheduler tunables
 ========================
 
@@ -25,6 +36,72 @@ there are multiple spindles behind single LUN (Host based hardware RAID
 controller or for storage arrays), setting slice_idle=0 might end up in better
 throughput and acceptable latencies.
 
+back_seek_max
+-------------
+This specifies, given in Kbytes, the maximum "distance" for backward seeking.
+The distance is the amount of space from the current head location to the
+sectors that are backward in terms of distance.
+
+This parameter allows the scheduler to anticipate requests in the "backward"
+direction and consider them as being the "next" if they are within this
+distance from the current head location.
+
+back_seek_penalty
+-----------------
+This parameter is used to compute the cost of backward seeking. If the
+backward distance of request is just 1/back_seek_penalty from a "front"
+request, then the seeking cost of two requests is considered equivalent.
+
+So scheduler will not bias toward one or the other request (otherwise scheduler
+will bias toward front request). Default value of back_seek_penalty is 2.
+
+fifo_expire_async
+-----------------
+This parameter is used to set the timeout of asynchronous requests. Default
+value of this is 248ms.
+
+fifo_expire_sync
+----------------
+This parameter is used to set the timeout of synchronous requests. Default
+value of this is 124ms. In case to favor synchronous requests over asynchronous
+one, this value should be decreased relative to fifo_expire_async.
+
+slice_async
+-----------
+This parameter is same as of slice_sync but for asynchronous queue. The
+default value is 40ms.
+
+slice_async_rq
+--------------
+This parameter is used to limit the dispatching of asynchronous request to
+device request queue in queue's slice time. The maximum number of request that
+are allowed to be dispatched also depends upon the io priority. Default value
+for this is 2.
+
+slice_sync
+----------
+When a queue is selected for execution, the queues IO requests are only
+executed for a certain amount of time(time_slice) before switching to another
+queue. This parameter is used to calculate the time slice of synchronous
+queue.
+
+time_slice is computed using the below equation:-
+time_slice = slice_sync + (slice_sync/5 * (4 - prio)). To increase the
+time_slice of synchronous queue, increase the value of slice_sync. Default
+value is 100ms.
+
+quantum
+-------
+This specifies the number of request dispatched to the device queue. In a
+queue's time slice, a request will not be dispatched if the number of request
+in the device exceeds this parameter. This parameter is used for synchronous
+request.
+
+In case of storage with several disk, this setting can limit the parallel
+processing of request. Therefore, increasing the value can imporve the
+performace although this can cause the latency of some I/O to increase due
+to more number of requests.
+
 CFQ IOPS Mode for group scheduling
 ===================================
 Basic CFQ design is to provide priority based time slices. Higher priority

trunk/Documentation/block/queue-sysfs.txt

@@ -9,20 +9,71 @@ These files are the ones found in the /sys/block/xxx/queue/ directory.
 Files denoted with a RO postfix are readonly and the RW postfix means
 read-write.
 
+add_random (RW)
+----------------
+This file allows to trun off the disk entropy contribution. Default
+value of this file is '1'(on).
+
+discard_granularity (RO)
+-----------------------
+This shows the size of internal allocation of the device in bytes, if
+reported by the device. A value of '0' means device does not support
+the discard functionality.
+
+discard_max_bytes (RO)
+----------------------
+Devices that support discard functionality may have internal limits on
+the number of bytes that can be trimmed or unmapped in a single operation.
+The discard_max_bytes parameter is set by the device driver to the maximum
+number of bytes that can be discarded in a single operation. Discard
+requests issued to the device must not exceed this limit. A discard_max_bytes
+value of 0 means that the device does not support discard functionality.
+
+discard_zeroes_data (RO)
+------------------------
+When read, this file will show if the discarded block are zeroed by the
+device or not. If its value is '1' the blocks are zeroed otherwise not.
+
 hw_sector_size (RO)
 -------------------
 This is the hardware sector size of the device, in bytes.
 
+iostats (RW)
+-------------
+This file is used to control (on/off) the iostats accounting of the
+disk.
+
+logical_block_size (RO)
+-----------------------
+This is the logcal block size of the device, in bytes.
+
 max_hw_sectors_kb (RO)
 ----------------------
 This is the maximum number of kilobytes supported in a single data transfer.
 
+max_integrity_segments (RO)
+---------------------------
+When read, this file shows the max limit of integrity segments as
+set by block layer which a hardware controller can handle.
+
 max_sectors_kb (RW)
 -------------------
 This is the maximum number of kilobytes that the block layer will allow
 for a filesystem request. Must be smaller than or equal to the maximum
 size allowed by the hardware.
 
+max_segments (RO)
+-----------------
+Maximum number of segments of the device.
+
+max_segment_size (RO)
+---------------------
+Maximum segment size of the device.
+
+minimum_io_size (RO)
+--------------------
+This is the smallest preferred io size reported by the device.
+
 nomerges (RW)
 -------------
 This enables the user to disable the lookup logic involved with IO
@@ -45,11 +96,24 @@ per-block-cgroup request pool.  IOW, if there are N block cgroups,
 each request queue may have upto N request pools, each independently
 regulated by nr_requests.
 
+optimal_io_size (RO)
+--------------------
+This is the optimal io size reported by the device.
+
+physical_block_size (RO)
+------------------------
+This is the physical block size of device, in bytes.
+
 read_ahead_kb (RW)
 ------------------
 Maximum number of kilobytes to read-ahead for filesystems on this block
 device.
 
+rotational (RW)
+---------------
+This file is used to stat if the device is of rotational type or
+non-rotational type.
+
 rq_affinity (RW)
 ----------------
 If this option is '1', the block layer will migrate request completions to the

trunk/Documentation/devicetree/bindings/arm/mrvl/tauros2.txt

@@ -0,0 +1,17 @@
+* Marvell Tauros2 Cache
+
+Required properties:
+- compatible : Should be "marvell,tauros2-cache".
+- marvell,tauros2-cache-features : Specify the features supported for the
+  tauros2 cache.
+  The features including
+    CACHE_TAUROS2_PREFETCH_ON       (1 << 0)
+    CACHE_TAUROS2_LINEFILL_BURST8   (1 << 1)
+  The definition can be found at
+  arch/arm/include/asm/hardware/cache-tauros2.h
+
+Example:
+	L2: l2-cache {
+		compatible = "marvell,tauros2-cache";
+		marvell,tauros2-cache-features = <0x3>;
+	};

trunk/Documentation/devicetree/bindings/arm/msm/timer.txt

@@ -0,0 +1,38 @@
+* MSM Timer
+
+Properties:
+
+- compatible : Should at least contain "qcom,msm-timer". More specific
+  properties such as "qcom,msm-gpt" and "qcom,msm-dgt" specify a general
+  purpose timer and a debug timer respectively.
+
+- interrupts : Interrupt indicating a match event.
+
+- reg : Specifies the base address of the timer registers. The second region
+  specifies an optional register used to configure the clock divider.
+
+- clock-frequency : The frequency of the timer in Hz.
+
+Optional:
+
+- cpu-offset : per-cpu offset used when the timer is accessed without the
+  CPU remapping facilities. The offset is cpu-offset * cpu-nr.
+
+Example:
+
+       timer@200a004 {
+               compatible = "qcom,msm-gpt", "qcom,msm-timer";
+               interrupts = <1 2 0x301>;
+               reg = <0x0200a004 0x10>;
+               clock-frequency = <32768>;
+               cpu-offset = <0x40000>;
+       };
+
+       timer@200a024 {
+               compatible = "qcom,msm-dgt", "qcom,msm-timer";
+               interrupts = <1 3 0x301>;
+               reg = <0x0200a024 0x10>,
+                     <0x0200a034 0x4>;
+               clock-frequency = <6750000>;
+               cpu-offset = <0x40000>;
+       };

trunk/Documentation/devicetree/bindings/arm/omap/omap.txt

@@ -36,6 +36,9 @@ Boards:
 - OMAP3 BeagleBoard : Low cost community board
   compatible = "ti,omap3-beagle", "ti,omap3"
 
+- OMAP3 Tobi with Overo : Commercial expansion board with daughter board
+  compatible = "ti,omap3-tobi", "ti,omap3-overo", "ti,omap3"
+
 - OMAP4 SDP : Software Developement Board
   compatible = "ti,omap4-sdp", "ti,omap4430"
 

trunk/Documentation/devicetree/bindings/clock/imx23-clock.txt

@@ -0,0 +1,76 @@
+* Clock bindings for Freescale i.MX23
+
+Required properties:
+- compatible: Should be "fsl,imx23-clkctrl"
+- reg: Address and length of the register set
+- #clock-cells: Should be <1>
+
+The clock consumer should specify the desired clock by having the clock
+ID in its "clocks" phandle cell.  The following is a full list of i.MX23
+clocks and IDs.
+
+	Clock		ID
+	------------------
+	ref_xtal	0
+	pll		1
+	ref_cpu		2
+	ref_emi		3
+	ref_pix		4
+	ref_io		5
+	saif_sel	6
+	lcdif_sel	7
+	gpmi_sel	8
+	ssp_sel		9
+	emi_sel		10
+	cpu		11
+	etm_sel		12
+	cpu_pll		13
+	cpu_xtal	14
+	hbus		15
+	xbus		16
+	lcdif_div	17
+	ssp_div		18
+	gpmi_div	19
+	emi_pll		20
+	emi_xtal	21
+	etm_div		22
+	saif_div	23
+	clk32k_div	24
+	rtc		25
+	adc		26
+	spdif_div	27
+	clk32k		28
+	dri		29
+	pwm		30
+	filt		31
+	uart		32
+	ssp		33
+	gpmi		34
+	spdif		35
+	emi		36
+	saif		37
+	lcdif		38
+	etm		39
+	usb		40
+	usb_pwr		41
+
+Examples:
+
+clks: clkctrl@80040000 {
+	compatible = "fsl,imx23-clkctrl";
+	reg = <0x80040000 0x2000>;
+	#clock-cells = <1>;
+	clock-output-names =
+		...
+		"uart",		/* 32 */
+		...
+		"end_of_list";
+};
+
+auart0: serial@8006c000 {
+	compatible = "fsl,imx23-auart";
+	reg = <0x8006c000 0x2000>;
+	interrupts = <24 25 23>;
+	clocks = <&clks 32>;
+	status = "disabled";
+};