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>

2 files changed, 49 insertions, 0 deletions

diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index 5f15265be5..9109ac6dba 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_DM_KEYBOARD) += keyboard-uclass.o
 obj-$(CONFIG_I8042_KEYB) += i8042.o
 obj-$(CONFIG_TEGRA_KEYBOARD) += tegra-kbc.o
 obj-$(CONFIG_TWL4030_INPUT) += twl4030.o
+obj-$(CONFIG_TWL6030_INPUT) += twl6030.o
 obj-$(CONFIG_CROS_EC_KEYB) += cros_ec_keyb.o
 ifdef CONFIG_PS2KBD
 obj-y += keyboard.o pc_keyb.o
diff --git a/drivers/input/twl6030.c b/drivers/input/twl6030.c
new file mode 100644
index 0000000000..8de032a1cd
--- /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;
+}