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Input: cap11xx - support for irq-active-high option 

Some applications need to use the irq-active-high push-pull option.
This allows it be enabled in the device tree child node.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Reviewed-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Matt Ranostay 2014-10-31 20:02:08 -07:00 committed by Dmitry Torokhov
parent 7609a5e973
commit 6bdd2fd1ed
2 changed files with 12 additions and 0 deletions
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4
Documentation/devicetree/bindings/input/cap11xx.txt
View File

@ -28,6 +28,10 @@ Optional properties:
Valid values are 1, 2, 4, and 8.
By default, a gain of 1 is set.
microchip,irq-active-high: By default the interrupt pin is active low
open drain. This property allows using the active
high push-pull output.
linux,keycodes: Specifies an array of numeric keycode values to
be used for the channels. If this property is
omitted, KEY_A, KEY_B, etc are used as

8
drivers/input/keyboard/cap11xx.c
View File

@ -45,6 +45,7 @@
#define CAP11XX_REG_STANDBY_SENSITIVITY 0x42
#define CAP11XX_REG_STANDBY_THRESH 0x43
#define CAP11XX_REG_CONFIG2 0x44
#define CAP11XX_REG_CONFIG2_ALT_POL BIT(6)
#define CAP11XX_REG_SENSOR_BASE_CNT(X) (0x50 + (X))
#define CAP11XX_REG_SENSOR_CALIB (0xb1 + (X))
#define CAP11XX_REG_SENSOR_CALIB_LSB1 0xb9
@ -263,6 +264,13 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client,
dev_err(dev, "Invalid sensor-gain value %d\n", gain32);
}
if (of_property_read_bool(node, "microchip,irq-active-high")) {
error = regmap_update_bits(priv->regmap, CAP11XX_REG_CONFIG2,
CAP11XX_REG_CONFIG2_ALT_POL, 0);
if (error)
return error;
}
/* Provide some useful defaults */
for (i = 0; i < cap->num_channels; i++)
priv->keycodes[i] = KEY_A + i;