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mfd: Use completion interrupt for WM831x AUXADC

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Use the completion interrupt generated by the device rather than
polling for conversions to complete. As a backup we still check
the status of the AUXADC if we don't get a completion, mostly for
systems that don't have the WM831x interrupt infrastructure hooked
up.

Also reduce the timeout for completion of conversions to 5ms from
the previous 10ms, the lower timeout should be sufficient.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2010-02-23 11:08:06 +00:00 • committed by Samuel Ortiz
parent d19663ac61
commit 473fe73650
2 changed files with 31 additions and 7 deletions
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2
include/linux/mfd/wm831x/core.h
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@ -15,6 +15,7 @@
#ifndef __MFD_WM831X_CORE_H__
#define __MFD_WM831X_CORE_H__
#include <linux/completion.h>
#include <linux/interrupt.h>
/*
@ -261,6 +262,7 @@ struct wm831x {
int num_gpio;
struct mutex auxadc_lock;
struct completion auxadc_done;
/* The WM831x has a security key blocking access to certain
* registers. The mutex is taken by the accessors for locking