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r: 314485
b: refs/heads/master
c: a77f4b4
h: refs/heads/master
i:
  314483: 2a5bb1e
v: v3
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David S. Miller committed Jun 19, 2012
1 parent 3c9e6f3 commit ffaa211
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2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: b3c911eeb47d08aada986f769b6a060794dfe9d0
refs/heads/master: a77f4b4acf5b77f038bc11d3ca9b3af6f0124015
93 changes: 93 additions & 0 deletions trunk/Documentation/devicetree/bindings/i2c/i2c-mux-pinctrl.txt
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Pinctrl-based I2C Bus Mux

This binding describes an I2C bus multiplexer that uses pin multiplexing to
route the I2C signals, and represents the pin multiplexing configuration
using the pinctrl device tree bindings.

+-----+ +-----+
| dev | | dev |
+------------------------+ +-----+ +-----+
| SoC | | |
| /----|------+--------+
| +---+ +------+ | child bus A, on first set of pins
| |I2C|---|Pinmux| |
| +---+ +------+ | child bus B, on second set of pins
| \----|------+--------+--------+
| | | | |
+------------------------+ +-----+ +-----+ +-----+
| dev | | dev | | dev |
+-----+ +-----+ +-----+

Required properties:
- compatible: i2c-mux-pinctrl
- i2c-parent: The phandle of the I2C bus that this multiplexer's master-side
port is connected to.

Also required are:

* Standard pinctrl properties that specify the pin mux state for each child
bus. See ../pinctrl/pinctrl-bindings.txt.

* Standard I2C mux properties. See mux.txt in this directory.

* I2C child bus nodes. See mux.txt in this directory.

For each named state defined in the pinctrl-names property, an I2C child bus
will be created. I2C child bus numbers are assigned based on the index into
the pinctrl-names property.

The only exception is that no bus will be created for a state named "idle". If
such a state is defined, it must be the last entry in pinctrl-names. For
example:

pinctrl-names = "ddc", "pta", "idle" -> ddc = bus 0, pta = bus 1
pinctrl-names = "ddc", "idle", "pta" -> Invalid ("idle" not last)
pinctrl-names = "idle", "ddc", "pta" -> Invalid ("idle" not last)

Whenever an access is made to a device on a child bus, the relevant pinctrl
state will be programmed into hardware.

If an idle state is defined, whenever an access is not being made to a device
on a child bus, the idle pinctrl state will be programmed into hardware.

If an idle state is not defined, the most recently used pinctrl state will be
left programmed into hardware whenever no access is being made of a device on
a child bus.

Example:

i2cmux {
compatible = "i2c-mux-pinctrl";
#address-cells = <1>;
#size-cells = <0>;

i2c-parent = <&i2c1>;

pinctrl-names = "ddc", "pta", "idle";
pinctrl-0 = <&state_i2cmux_ddc>;
pinctrl-1 = <&state_i2cmux_pta>;
pinctrl-2 = <&state_i2cmux_idle>;

i2c@0 {
reg = <0>;
#address-cells = <1>;
#size-cells = <0>;

eeprom {
compatible = "eeprom";
reg = <0x50>;
};
};

i2c@1 {
reg = <1>;
#address-cells = <1>;
#size-cells = <0>;

eeprom {
compatible = "eeprom";
reg = <0x50>;
};
};
};

9 changes: 9 additions & 0 deletions trunk/Documentation/kernel-parameters.txt
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Expand Up @@ -2543,6 +2543,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.

sched_debug [KNL] Enables verbose scheduler debug messages.

skew_tick= [KNL] Offset the periodic timer tick per cpu to mitigate
xtime_lock contention on larger systems, and/or RCU lock
contention on all systems with CONFIG_MAXSMP set.
Format: { "0" | "1" }
0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1"
1 -- enable.
Note: increases power consumption, thus should only be
enabled if running jitter sensitive (HPC/RT) workloads.

security= [SECURITY] Choose a security module to enable at boot.
If this boot parameter is not specified, only the first
security module asking for security registration will be
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5 changes: 5 additions & 0 deletions trunk/Documentation/networking/batman-adv.txt
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Expand Up @@ -211,6 +211,11 @@ The debug output can be changed at runtime using the file

will enable debug messages for when routes change.

Counters for different types of packets entering and leaving the
batman-adv module are available through ethtool:

# ethtool --statistics bat0


BATCTL
------
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