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>

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>
Paul Kocialkowski · Tom Rini
1 parent d6a2042dbc
Showing 3 changed files with 70 additions and 0 deletions Side-by-side Diff
drivers/input/Makefile
drivers/input/twl6030.c
include/twl6030.h
@@ -10,6 +10,7 @@
 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
+/*
+ * 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;
+}
@@ -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 @@
 	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);
@@ -196,6 +209,14 @@
 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 */
...	...	@@ -10,6 +10,7 @@
10	10	obj-$(CONFIG_I8042_KEYB) += i8042.o
11	11	obj-$(CONFIG_TEGRA_KEYBOARD) += tegra-kbc.o
12	12	obj-$(CONFIG_TWL4030_INPUT) += twl4030.o
	13	+obj-$(CONFIG_TWL6030_INPUT) += twl6030.o
13	14	obj-$(CONFIG_CROS_EC_KEYB) += cros_ec_keyb.o
14	15	ifdef CONFIG_PS2KBD
15	16	obj-y += keyboard.o pc_keyb.o
	1	+/*
	2	+ * TWL6030 input
	3	+ *
	4	+ * Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr>
	5	+ *
	6	+ * SPDX-License-Identifier: GPL-2.0+
	7	+ */
	8	+
	9	+#include <twl6030.h>
	10	+
	11	+int twl6030_input_power_button(void)
	12	+{
	13	+ u8 value;
	14	+
	15	+ twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_STS_HW_CONDITIONS, &value);
	16	+
	17	+ /* Power button is active low. */
	18	+ if (value & TWL6030_STS_HW_CONDITIONS_PWRON)
	19	+ return 0;
	20	+
	21	+ return 1;
	22	+}
	23	+
	24	+int twl6030_input_charger(void)
	25	+{
	26	+ u8 value;
	27	+
	28	+ twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, TWL6030_CONTROLLER_STAT1,
	29	+ &value);
	30	+
	31	+ if (value & TWL6030_CONTROLLER_STAT1_VAC_DET)
	32	+ return 1;
	33	+
	34	+ return 0;
	35	+}
	36	+
	37	+int twl6030_input_usb(void)
	38	+{
	39	+ u8 value;
	40	+
	41	+ twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, TWL6030_CONTROLLER_STAT1,
	42	+ &value);
	43	+
	44	+ if (value & TWL6030_CONTROLLER_STAT1_VBUS_DET)
	45	+ return 1;
	46	+
	47	+ return 0;
	48	+}
...	...	@@ -20,6 +20,10 @@
20	20	#define TWL6030_CHIP_PWM 0x49
21	21
22	22	/* Slave Address 0x48 */
	23	+#define TWL6030_STS_HW_CONDITIONS 0x21
	24	+
	25	+#define TWL6030_STS_HW_CONDITIONS_PWRON (1 << 0)
	26	+
23	27	#define TWL6030_PHOENIX_DEV_ON 0x25
24	28
25	29	#define TWL6030_PHOENIX_APP_DEVOFF (1 << 0)
...	...	@@ -59,6 +63,11 @@
59	63
60	64	/* Slave Address 0x49 */
61	65
	66	+#define TWL6030_CONTROLLER_STAT1 0xE3
	67	+
	68	+#define TWL6030_CONTROLLER_STAT1_VAC_DET (1 << 3)
	69	+#define TWL6030_CONTROLLER_STAT1_VBUS_DET (1 << 2)
	70	+
62	71	/* Battery CHARGER REGISTERS */
63	72	#define CONTROLLER_INT_MASK 0xE0
64	73	#define CONTROLLER_CTRL1 0xE1
...	...	@@ -188,6 +197,10 @@
188	197	return i2c_read(chip_no, reg, 1, val, 1);
189	198	}
190	199
	200	+/*
	201	+ * Power
	202	+ */
	203	+
191	204	void twl6030_power_off(void);
192	205	void twl6030_init_battery_charging(void);
193	206	void twl6030_usb_device_settings(void);
...	...	@@ -196,6 +209,14 @@
196	209	int twl6030_get_battery_voltage(void);
197	210	int twl6030_get_battery_current(void);
198	211	void twl6030_power_mmc_init(int dev_index);
	212	+
	213	+/*
	214	+ * Input
	215	+ */
	216	+
	217	+int twl6030_input_power_button(void);
	218	+int twl6030_input_charger(void);
	219	+int twl6030_input_usb(void);
199	220
200	221	#endif /* TWL6030_H */