LXR uboot/drivers/input/twl4030.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * TWL4030 input
   4 *
   5 * Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
   6 */
   7
   8#include <twl4030.h>
   9
  10int twl4030_input_power_button(void)
  11{
  12        u8 data;
  13
  14        twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
  15                            TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
  16
  17        if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_PWON)
  18                return 1;
  19
  20        return 0;
  21}
  22
  23int twl4030_input_charger(void)
  24{
  25        u8 data;
  26
  27        twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
  28                            TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
  29
  30        if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_CHG)
  31                return 1;
  32
  33        return 0;
  34}
  35
  36int twl4030_input_usb(void)
  37{
  38        u8 data;
  39
  40        twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
  41                            TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
  42
  43        if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_USB ||
  44            data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_VBUS)
  45                return 1;
  46
  47        return 0;
  48}
  49
  50int twl4030_keypad_scan(unsigned char *matrix)
  51{
  52        u8 data;
  53        u8 c, r;
  54
  55        twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
  56                            TWL4030_KEYPAD_KEYP_CTRL_REG, &data);
  57
  58        data |= TWL4030_KEYPAD_CTRL_SOFT_NRST | TWL4030_KEYPAD_CTRL_KBD_ON;
  59        data &= ~TWL4030_KEYPAD_CTRL_SOFTMODEN;
  60
  61        twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
  62                             TWL4030_KEYPAD_KEYP_CTRL_REG, data);
  63
  64        for (c = 0; c < 8; c++) {
  65                data = 0xff & ~(1 << c);
  66                twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
  67                                     TWL4030_KEYPAD_KBC_REG, data);
  68
  69                data = 0xff;
  70                twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
  71                                    TWL4030_KEYPAD_KBR_REG, &data);
  72
  73                for (r = 0; r < 8; r++)
  74                        matrix[c * 8 + r] = !(data & (1 << r));
  75        }
  76
  77        data = 0xff & ~(TWL4030_KEYPAD_CTRL_SOFT_NRST);
  78        twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
  79                             TWL4030_KEYPAD_KEYP_CTRL_REG, data);
  80
  81        return 0;
  82}
  83
  84int twl4030_keypad_key(unsigned char *matrix, u8 c, u8 r)
  85{
  86        return matrix[c * 8 + r];
  87}
  88