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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-08-22 09:45:39 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-08-22 09:59:20 -0700 |
| commit | c0409feb86893f5ccf73964c7b2b47ca64bdb014 (patch) | |
| tree | cb889f2e239a6261e8b657979b932b32bae579da /drivers/input/misc/ad714x.h | |
| parent | 6337de2204be3b7b40825a1d30de30e514e8947b (diff) | |
Input: ad714x - use DMA-safe buffers for spi_write()
spi_write() requires use of DMA-safe (cacheline aligned) buffers.
Also use the same buffers when reading data since to avoid extra
locking and potential memory allocation in spi_write_then_read().
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/misc/ad714x.h')
| -rw-r--r-- | drivers/input/misc/ad714x.h | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/drivers/input/misc/ad714x.h b/drivers/input/misc/ad714x.h index 45c54fb13f0..d12d14911fc 100644 --- a/drivers/input/misc/ad714x.h +++ b/drivers/input/misc/ad714x.h @@ -11,11 +11,40 @@ #include <linux/types.h> +#define STAGE_NUM 12 + struct device; +struct ad714x_platform_data; +struct ad714x_driver_data; struct ad714x_chip; -typedef int (*ad714x_read_t)(struct device *, unsigned short, unsigned short *); -typedef int (*ad714x_write_t)(struct device *, unsigned short, unsigned short); +typedef int (*ad714x_read_t)(struct ad714x_chip *, unsigned short, unsigned short *); +typedef int (*ad714x_write_t)(struct ad714x_chip *, unsigned short, unsigned short); + +struct ad714x_chip { + unsigned short h_state; + unsigned short l_state; + unsigned short c_state; + unsigned short adc_reg[STAGE_NUM]; + unsigned short amb_reg[STAGE_NUM]; + unsigned short sensor_val[STAGE_NUM]; + + struct ad714x_platform_data *hw; + struct ad714x_driver_data *sw; + + int irq; + struct device *dev; + ad714x_read_t read; + ad714x_write_t write; + + struct mutex mutex; + + unsigned product; + unsigned version; + + __be16 xfer_buf[16] ____cacheline_aligned; + +}; int ad714x_disable(struct ad714x_chip *ad714x); int ad714x_enable(struct ad714x_chip *ad714x); |