From c0409feb86893f5ccf73964c7b2b47ca64bdb014 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Mon, 22 Aug 2011 09:45:39 -0700 Subject: 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 Signed-off-by: Dmitry Torokhov --- drivers/input/misc/ad714x.h | 33 +++++++++++++++++++++++++++++++-- 1 file changed, 31 insertions(+), 2 deletions(-) (limited to 'drivers/input/misc/ad714x.h') 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 +#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); -- cgit v1.2.3-70-g09d2