Input: ads7846 - be more compatible with the hwmon framework
- Hook up to hwmon
* show sensor attributes only if hwmon is present
* ... and the board's reference voltage is known
* otherwise be just a touchscreen
- Report voltages per hwmon convention
* measure in millivolts
* voltages are named in[0-8]_input (ugh)
* for 7846 chips, properly range-adjust vBATT/in1_input
Battery measurements help during recharge monitoring. On OSK/Mistral,
the measured voltage agreed with a multimeter to several decimal places.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 29ca0ab0..4bec842 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -12,13 +12,18 @@
if INPUT_TOUCHSCREEN
config TOUCHSCREEN_ADS7846
- tristate "ADS 7846 based touchscreens"
+ tristate "ADS 7846/7843 based touchscreens"
depends on SPI_MASTER
+ depends on HWMON = n || HWMON
help
Say Y here if you have a touchscreen interface using the
- ADS7846 controller, and your board-specific initialization
+ ADS7846 or ADS7843 controller, and your board-specific setup
code includes that in its table of SPI devices.
+ If HWMON is selected, and the driver is told the reference voltage
+ on your board, you will also get hwmon interfaces for the voltage
+ (and on ads7846, temperature) sensors of this chip.
+
If unsure, say N (but it's safe to say "Y").
To compile this driver as a module, choose M here: the