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i2c: gpio: fault-injector: better SPHINX style in docs 

We don't use SPHINX currently in I2C documentation; but preparing the
I2C fault injector docs already is a good idea since it makes it easier
to read. Especially as new stuff is going to be added soon.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2019-01-21 15:16:57 +01:00 committed by Wolfram Sang
parent c6324fadea
commit 05bd07280d
1 changed files with 7 additions and 3 deletions
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10
Documentation/i2c/gpio-fault-injection
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@ -1,3 +1,4 @@
=========================
Linux I2C fault injection
=========================
@ -13,6 +14,9 @@ mounted at /sys/kernel/debug. There will be a separate subdirectory per GPIO
driven I2C bus. Each subdirectory will contain files to trigger the fault
injection. They will be described now along with their intended use-cases.
Wire states
===========
"scl"
-----
@ -34,10 +38,10 @@ I2C specification version 4, section 3.1.16) using the helpers of the Linux I2C
core (see 'struct bus_recovery_info'). However, the bus recovery will not
succeed because SDA is still pinned low until you manually release it again
with "echo 1 > sda". A test with an automatic release can be done with the
following class of fault injectors.
"incomplete transfers" class of fault injectors.
Introduction to incomplete transfers
------------------------------------
Incomplete transfers
====================
The following fault injectors create situations where SDA will be held low by a
device. Bus recovery should be able to fix these situations. But please note: