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Input: add AD7879 Touchscreen driver

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[randy.dunlap@oracle.com: don't use bus_id]
[dtor@mail.ru: locking and other fixups]
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Michael Hennerich
2009-03-09 20:14:10 -07:00
committed by Dmitry Torokhov
parent 331b78ed30
commit b4be468cc1
4 changed files with 850 additions and 0 deletions
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drivers/input/touchscreen/Kconfig
+32
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@@ -42,6 +42,38 @@ config TOUCHSCREEN_AD7877
To compile this driver as a module, choose M here: the
module will be called ad7877.
config TOUCHSCREEN_AD7879_I2C
tristate "AD7879 based touchscreens: AD7879-1 I2C Interface"
depends on I2C
select TOUCHSCREEN_AD7879
help
Say Y here if you have a touchscreen interface using the
AD7879-1 controller, and your board-specific initialization
code includes that in its table of I2C devices.
If unsure, say N (but it's safe to say "Y").
To compile this driver as a module, choose M here: the
module will be called ad7879.
config TOUCHSCREEN_AD7879_SPI
tristate "AD7879 based touchscreens: AD7879 SPI Interface"
depends on SPI_MASTER && TOUCHSCREEN_AD7879_I2C = n
select TOUCHSCREEN_AD7879
help
Say Y here if you have a touchscreen interface using the
AD7879 controller, and your board-specific initialization
code includes that in its table of SPI devices.
If unsure, say N (but it's safe to say "Y").
To compile this driver as a module, choose M here: the
module will be called ad7879.
config TOUCHSCREEN_AD7879
tristate
default n
config TOUCHSCREEN_BITSY
tristate "Compaq iPAQ H3600 (Bitsy) touchscreen"
depends on SA1100_BITSY
drivers/input/touchscreen/Makefile
+1
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@@ -7,6 +7,7 @@
wm97xx-ts-y := wm97xx-core.o
obj-$(CONFIG_TOUCHSCREEN_AD7877) += ad7877.o
obj-$(CONFIG_TOUCHSCREEN_AD7879) += ad7879.o
obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o
obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o
obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o
drivers/input/touchscreen/ad7879.c
+782
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File diff suppressed because it is too large Load Diff
include/linux/spi/ad7879.h
+35
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@@ -0,0 +1,35 @@
/* linux/spi/ad7879.h */
/* Touchscreen characteristics vary between boards and models. The
* platform_data for the device's "struct device" holds this information.
*
* It's OK if the min/max values are zero.
*/
struct ad7879_platform_data {
u16 model; /* 7879 */
u16 x_plate_ohms;
u16 x_min, x_max;
u16 y_min, y_max;
u16 pressure_min, pressure_max;
/* [0..255] 0=OFF Starts at 1=550us and goes
* all the way to 9.440ms in steps of 35us.
*/
u8 pen_down_acc_interval;
/* [0..15] Starts at 0=128us and goes all the
* way to 4.096ms in steps of 128us.
*/
u8 first_conversion_delay;
/* [0..3] 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */
u8 acquisition_time;
/* [0..3] Average X middle samples 0 = 2, 1 = 4, 2 = 8, 3 = 16 */
u8 averaging;
/* [0..3] Perform X measurements 0 = OFF,
* 1 = 4, 2 = 8, 3 = 16 (median > averaging)
*/
u8 median;
/* 1 = AUX/VBAT/GPIO set to GPIO Output */
u8 gpio_output;
/* Initial GPIO pin state (valid if gpio_output = 1) */
u8 gpio_default;
};