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>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/input/keyboard/cap11xx.c b/drivers/input/keyboard/cap11xx.c
index eeda1f9359cd..4f59f0bab28f 100644
--- a/drivers/input/keyboard/cap11xx.c
+++ b/drivers/input/keyboard/cap11xx.c
@@ -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;