mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 17:10:11 +00:00
a4c8bbbc28
This allows scanning the twl4030 keypad, storing the result in a 64-byte long matrix with the twl4030_keypad_scan function. Detecting a key at a given column and row is made easier with the twl4030_keypad_key function. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Reviewed-by: Tom Rini <trini@konsulko.com>
88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/*
|
|
* TWL4030 input
|
|
*
|
|
* Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <twl4030.h>
|
|
|
|
int twl4030_input_power_button(void)
|
|
{
|
|
u8 data;
|
|
|
|
twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
|
|
TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
|
|
|
|
if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_PWON)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int twl4030_input_charger(void)
|
|
{
|
|
u8 data;
|
|
|
|
twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
|
|
TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
|
|
|
|
if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_CHG)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int twl4030_input_usb(void)
|
|
{
|
|
u8 data;
|
|
|
|
twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
|
|
TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
|
|
|
|
if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_USB ||
|
|
data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_VBUS)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int twl4030_keypad_scan(unsigned char *matrix)
|
|
{
|
|
u8 data;
|
|
u8 c, r;
|
|
|
|
twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
|
|
TWL4030_KEYPAD_KEYP_CTRL_REG, &data);
|
|
|
|
data |= TWL4030_KEYPAD_CTRL_SOFT_NRST | TWL4030_KEYPAD_CTRL_KBD_ON;
|
|
data &= ~TWL4030_KEYPAD_CTRL_SOFTMODEN;
|
|
|
|
twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
|
|
TWL4030_KEYPAD_KEYP_CTRL_REG, data);
|
|
|
|
for (c = 0; c < 8; c++) {
|
|
data = 0xff & ~(1 << c);
|
|
twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
|
|
TWL4030_KEYPAD_KBC_REG, data);
|
|
|
|
data = 0xff;
|
|
twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
|
|
TWL4030_KEYPAD_KBR_REG, &data);
|
|
|
|
for (r = 0; r < 8; r++)
|
|
matrix[c * 8 + r] = !(data & (1 << r));
|
|
}
|
|
|
|
data = 0xff & ~(TWL4030_KEYPAD_CTRL_SOFT_NRST);
|
|
twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
|
|
TWL4030_KEYPAD_KEYP_CTRL_REG, data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int twl4030_keypad_key(unsigned char *matrix, u8 c, u8 r)
|
|
{
|
|
return matrix[c * 8 + r];
|
|
}
|