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 <cont...@paulk.fr>
---
drivers/input/Makefile | 1 +
drivers/input/twl6030.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
include/twl6030.h | 21 +++++++++++++++++++++
3 files changed, 70 insertions(+)
create mode 100644 drivers/input/twl6030.c
diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index 5f15265..9109ac6 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 0000000..8de032a
--- /dev/null
+++ b/drivers/input/twl6030.c
@@ -0,0 +1,48 @@
+/*
+ * TWL6030 input
+ *
+ * Copyright (C) 2016 Paul Kocialkowski <cont...@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;
+}
diff --git a/include/twl6030.h b/include/twl6030.h
index 26c27a4..40e2c11 100644
--- a/include/twl6030.h
+++ b/include/twl6030.h
@@ -20,6 +20,10 @@
#define TWL6030_CHIP_PWM 0x49
/* Slave Address 0x48 */
+#define TWL6030_STS_HW_CONDITIONS 0x21
+
+#define TWL6030_STS_HW_CONDITIONS_PWRON (1 << 0)
+
#define TWL6030_PHOENIX_DEV_ON 0x25
#define TWL6030_PHOENIX_APP_DEVOFF (1 << 0)
@@ -59,6 +63,11 @@
/* Slave Address 0x49 */
+#define TWL6030_CONTROLLER_STAT1 0xE3
+
+#define TWL6030_CONTROLLER_STAT1_VAC_DET (1 << 3)
+#define TWL6030_CONTROLLER_STAT1_VBUS_DET (1 << 2)
+
/* Battery CHARGER REGISTERS */
#define CONTROLLER_INT_MASK 0xE0
#define CONTROLLER_CTRL1 0xE1
@@ -188,6 +197,10 @@ static inline int twl6030_i2c_read_u8(u8 chip_no, u8 reg,
u8 *val)
return i2c_read(chip_no, reg, 1, val, 1);
}
+/*
+ * Power
+ */
+
void twl6030_power_off(void);
void twl6030_init_battery_charging(void);
void twl6030_usb_device_settings(void);
@@ -197,4 +210,12 @@ int twl6030_get_battery_voltage(void);
int twl6030_get_battery_current(void);
void twl6030_power_mmc_init(int dev_index);
+/*
+ * Input
+ */
+
+int twl6030_input_power_button(void);
+int twl6030_input_charger(void);
+int twl6030_input_usb(void);
+
#endif /* TWL6030_H */
--
2.6.4
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