Eric Lee / smarc-uboot

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drivers/input/twl4030.c 1.74 KB
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7d5ac9183   Paul Kocialkowski   input: TWL4030 in... 
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  /*
   * 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;
  }
a4c8bbbc2   Paul Kocialkowski   input: twl4030: K... 
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  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];
  }