LXR uboot/drivers/input/twl4030.c

   1/*
   2 * TWL4030 input
   3 *
   4 * Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8
   9#include <twl4030.h>
  10
  11int twl4030_input_power_button(void)
  12{
  13        u8 data;
  14
  15        twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
  16                            TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
  17
  18        if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_PWON)
  19                return 1;
  20
  21        return 0;
  22}
  23
  24int twl4030_input_charger(void)
  25{
  26        u8 data;
  27
  28        twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
  29                            TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
  30
  31        if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_CHG)
  32                return 1;
  33
  34        return 0;
  35}
  36
  37int twl4030_input_usb(void)
  38{
  39        u8 data;
  40
  41        twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
  42                            TWL4030_PM_MASTER_STS_HW_CONDITIONS, &data);
  43
  44        if (data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_USB ||
  45            data & TWL4030_PM_MASTER_STS_HW_CONDITIONS_VBUS)
  46                return 1;
  47
  48        return 0;
  49}
  50
  51int twl4030_keypad_scan(unsigned char *matrix)
  52{
  53        u8 data;
  54        u8 c, r;
  55
  56        twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
  57                            TWL4030_KEYPAD_KEYP_CTRL_REG, &data);
  58
  59        data |= TWL4030_KEYPAD_CTRL_SOFT_NRST | TWL4030_KEYPAD_CTRL_KBD_ON;
  60        data &= ~TWL4030_KEYPAD_CTRL_SOFTMODEN;
  61
  62        twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
  63                             TWL4030_KEYPAD_KEYP_CTRL_REG, data);
  64
  65        for (c = 0; c < 8; c++) {
  66                data = 0xff & ~(1 << c);
  67                twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
  68                                     TWL4030_KEYPAD_KBC_REG, data);
  69
  70                data = 0xff;
  71                twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
  72                                    TWL4030_KEYPAD_KBR_REG, &data);
  73
  74                for (r = 0; r < 8; r++)
  75                        matrix[c * 8 + r] = !(data & (1 << r));
  76        }
  77
  78        data = 0xff & ~(TWL4030_KEYPAD_CTRL_SOFT_NRST);
  79        twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
  80                             TWL4030_KEYPAD_KEYP_CTRL_REG, data);
  81
  82        return 0;
  83}
  84
  85int twl4030_keypad_key(unsigned char *matrix, u8 c, u8 r)
  86{
  87        return matrix[c * 8 + r];
  88}
  89