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| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-05 14:04:24 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-05 14:04:24 +0800 |
| commit | cefe8a32f2a5887246ed250115e34bee6ecc8d61 (patch) | |
| tree | 1e8220456df31a05c6c56889545f2d8360f5a7b9 /include/linux | |
| parent | staging: zcache: fix "zcache=" kernel parameter (diff) | |
| parent | iio: ti_am335x_adc: Fix wrong samples received on 1st read (diff) | |
| download | linux-dev-cefe8a32f2a5887246ed250115e34bee6ecc8d61.tar.xz linux-dev-cefe8a32f2a5887246ed250115e34bee6ecc8d61.zip | |
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.
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iio/trigger.h | 3 | ||||
| -rw-r--r-- | include/linux/mfd/ti_am335x_tscadc.h | 16 |
2 files changed, 18 insertions, 1 deletions
diff --git a/include/linux/iio/trigger.h b/include/linux/iio/trigger.h index 3869c525b052..369cf2cd5144 100644 --- a/include/linux/iio/trigger.h +++ b/include/linux/iio/trigger.h @@ -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; diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h index 8d73fe29796a..db1791bb997a 100644 --- a/include/linux/mfd/ti_am335x_tscadc.h +++ b/include/linux/mfd/ti_am335x_tscadc.h @@ -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 { |