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
  11 int 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
  24 int 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
  37 int 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
  51 int 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
  85 int twl4030_keypad_key(unsigned char *matrix, u8 c, u8 r)
  86 {
  87         return matrix[c * 8 + r];
  88 }