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w1: masters: omap_hdq: add support for 1-wire mode

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This patches makes following changes to omap_hdq driver
 - Enable 1-wire mode.
 - Implement w1_triplet callback to facilitate search rom
   procedure and auto detection of 1-wire slaves.
 - Proper enabling and disabling of interrupt.
 - Cleanups (formatting and return value checks).

HDQ mode remains unchanged.

Signed-off-by: Vignesh R <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Pawel Moll <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Ian Campbell <[email protected]>
Cc: Kumar Gala <[email protected]>
Acked-by: Evgeniy Polyakov <[email protected]>
Cc: Jonathan Corbet <[email protected]>
CC: Tony Lindgren <[email protected]>
Cc: Vignesh R <[email protected]>
Cc: NeilBrown <[email protected]>
Cc: Fabian Frederick <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Vignesh R 2015-09-14 10:54:33 -07:00 • committed by Greg Kroah-Hartman
commit e93762bbf6
3 changed files with 203 additions and 34 deletions
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6
Documentation/w1/masters/omap-hdq
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@ -44,3 +44,9 @@ e.g:
insmod omap_hdq.ko W1_ID=2
inamod w1_bq27000.ko F_ID=2
The driver also supports 1-wire mode. In this mode, there is no need to
pass slave ID as parameter. The driver will auto-detect slaves connected
to the bus using SEARCH_ROM procedure. 1-wire mode can be selected by
setting "ti,mode" property to "1w" in DT (see
Documentation/devicetree/bindings/w1/omap-hdq.txt for more details).
By default driver is in HDQ mode.