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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>
utp
Paul Kocialkowski 2016-02-27 19:19:13 +01:00 committed by Tom Rini
parent d6a2042dbc
commit 461484c27e
3 changed files with 70 additions and 0 deletions
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1
drivers/input/Makefile
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@ -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

48
drivers/input/twl6030.c 100644
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@ -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;
}

21
include/twl6030.h
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@ -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 */