input: TWL6030 input support for power button, USB and charger
This adds support for detecting a few inputs exported by the TWL6030.
Currently-supported inputs are the power button, USB and charger presence.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
diff --git a/drivers/input/twl6030.c b/drivers/input/twl6030.c
new file mode 100644
index 0000000..8de032a
--- /dev/null
+++ b/drivers/input/twl6030.c
@@ -0,0 +1,48 @@
+/*
+ * TWL6030 input
+ *
+ * Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <twl6030.h>
+
+int twl6030_input_power_button(void)
+{
+ u8 value;
+
+ twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_STS_HW_CONDITIONS, &value);
+
+ /* Power button is active low. */
+ if (value & TWL6030_STS_HW_CONDITIONS_PWRON)
+ return 0;
+
+ return 1;
+}
+
+int twl6030_input_charger(void)
+{
+ u8 value;
+
+ twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, TWL6030_CONTROLLER_STAT1,
+ &value);
+
+ if (value & TWL6030_CONTROLLER_STAT1_VAC_DET)
+ return 1;
+
+ return 0;
+}
+
+int twl6030_input_usb(void)
+{
+ u8 value;
+
+ twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, TWL6030_CONTROLLER_STAT1,
+ &value);
+
+ if (value & TWL6030_CONTROLLER_STAT1_VBUS_DET)
+ return 1;
+
+ return 0;
+}