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Revision e543c8a92fb6eca8dd554561fa55bba5f2a90d09 authored by Linus Torvalds on 05 June 2017, 22:31:14 UTC, committed by Linus Torvalds on 05 June 2017, 22:31:14 UTC 
Merge branch 'for-4.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
 
Pull libata fixes from Tejun Heo:

 - Revert of sata_mv devm_ioremap_resource() conversion. It made init
   fail if there are overlapping resources which led to detection
   failures on some setups.

 - A workaround for an Acer laptop which sometimes reports corrupt port
   map.

 - Other non-critical fixes.

* 'for-4.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata: fix error checking in in ata_parse_force_one()
  Revert "ata: sata_mv: Convert to devm_ioremap_resource()"
  ata: libahci: properly propagate return value of platform_get_irq()
  ata: sata_rcar: Handle return value of clk_prepare_enable
  ahci: Acer SA5-271 SSD Not Detected Fix
2 parent s 112eb07 + f7cf69a
Raw File
fmc-fakedev.txt 
fmc-fakedev
===========

This package includes a software-only device, called fmc-fakedev, which
is able to register up to 4 mezzanines (by default it registers one).
Unlike the SPEC driver, which creates an FMC device for each PCI cards
it manages, this module creates a single instance of its set of
mezzanines.

It is meant as the simplest possible example of how a driver should be
written, and it includes a fake EEPROM image (built using the tools
described in *note FMC Identification::),, which by default is
replicated for each fake mezzanine.

You can also use this device to verify the match algorithms, by asking
it to test your own EEPROM image. You can provide the image by means of
the eeprom= module parameter: the new EEPROM image is loaded, as usual,
by means of the firmware loader.  This example shows the defaults and a
custom EEPROM image:

     spusa.root# insmod fmc-fakedev.ko
     [   99.971247]  fake-fmc-carrier: mezzanine 0
     [   99.975393]       Manufacturer: fake-vendor
     [   99.979624]       Product name: fake-design-for-testing
     spusa.root# rmmod fmc-fakedev
     spusa.root# insmod fmc-fakedev.ko eeprom=fdelay-eeprom.bin
     [  121.447464]  fake-fmc-carrier: Mezzanine 0: eeprom "fdelay-eeprom.bin"
     [  121.462725]  fake-fmc-carrier: mezzanine 0
     [  121.466858]       Manufacturer: CERN
     [  121.470477]       Product name: FmcDelay1ns4cha
     spusa.root# rmmod fmc-fakedev

After loading the device, you can use the write_ee method do modify its
own internal fake EEPROM: whenever the image is overwritten starting at
offset 0, the module will unregister and register again the FMC device.
This is shown in fmc-write-eeprom.txt
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