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Second round of IIO fixes for the 3.11 cycle.

Browse source 
1) Fix a long term race in the IIO trigger handling.
    This only effects cases where a single trigger is in use
    by multiple devices.
 2) ti_am335x fix an issue with incorrect data due to reading before
    the sequencer is finished.
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Merge tag 'iio-fixes-for-3.11b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

Second round of IIO fixes for the 3.11 cycle.

1) Fix a long term race in the IIO trigger handling.
   This only effects cases where a single trigger is in use
   by multiple devices.
2) ti_am335x fix an issue with incorrect data due to reading before
   the sequencer is finished.
This commit is contained in:
Greg Kroah-Hartman 2013-08-05 14:04:24 +08:00
commit cefe8a32f2
4 changed files with 62 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/linux/iio/trigger.h
View file

@ -8,6 +8,7 @@
*/
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/atomic.h>
#ifndef _IIO_TRIGGER_H_
#define _IIO_TRIGGER_H_
@ -61,7 +62,7 @@ struct iio_trigger {
struct list_head list;
struct list_head alloc_list;
int use_count;
atomic_t use_count;
struct irq_chip subirq_chip;
int subirq_base;

16
include/linux/mfd/ti_am335x_tscadc.h
View file

@ -113,11 +113,27 @@
#define CNTRLREG_8WIRE CNTRLREG_AFE_CTRL(3)
#define CNTRLREG_TSCENB BIT(7)
/* FIFO READ Register */
#define FIFOREAD_DATA_MASK (0xfff << 0)
#define FIFOREAD_CHNLID_MASK (0xf << 16)
/* Sequencer Status */
#define SEQ_STATUS BIT(5)
#define ADC_CLK 3000000
#define MAX_CLK_DIV 7
#define TOTAL_STEPS 16
#define TOTAL_CHANNELS 8
/*
* ADC runs at 3MHz, and it takes
* 15 cycles to latch one data output.
* Hence the idle time for ADC to
* process one sample data would be
* around 5 micro seconds.
*/
#define IDLE_TIMEOUT 5 /* microsec */
#define TSCADC_CELLS 2
struct ti_tscadc_dev {