/*
* Set output value of IO pins in 'reg_bit' to corresponding value in 'data'
* 0 = low, 1 = high
*/
int tca642x_set_val(uchar chip, uint8_t gpio_bank,
uint8_t reg_bit, uint8_t data)
{
uint8_t out_reg = tca642x_regs[gpio_bank].output_reg;
return tca642x_reg_write(chip, out_reg, reg_bit, data);
}
/*
* Set read polarity of IO pins in 'reg_bit' to corresponding value in 'data'
* 0 = read pin value, 1 = read inverted pin value
*/
int tca642x_set_pol(uchar chip, uint8_t gpio_bank,
uint8_t reg_bit, uint8_t data)
{
uint8_t pol_reg = tca642x_regs[gpio_bank].polarity_reg;
return tca642x_reg_write(chip, pol_reg, reg_bit, data);
}
/*
* Set direction of IO pins in 'reg_bit' to corresponding value in 'data'
* 0 = output, 1 = input
*/
int tca642x_set_dir(uchar chip, uint8_t gpio_bank,
uint8_t reg_bit, uint8_t data)
{
uint8_t config_reg = tca642x_regs[gpio_bank].configuration_reg;
return tca642x_reg_write(chip, config_reg, reg_bit, data);
}
/*
* Set the inital register states for the tca642x gpio expander
*/
int tca642x_set_inital_state(uchar chip, struct tca642x_bank_info init_data[])
{
int i, ret;
uint8_t config_reg;
uint8_t polarity_reg;
uint8_t output_reg;
for (i = 0; i < 3; i++) {
config_reg = tca642x_regs[i].configuration_reg;
ret = tca642x_reg_write(chip, config_reg, 0xff,
init_data[i].configuration_reg);
polarity_reg = tca642x_regs[i].polarity_reg;
ret = tca642x_reg_write(chip, polarity_reg, 0xff,
init_data[i].polarity_reg);
output_reg = tca642x_regs[i].output_reg;
ret = tca642x_reg_write(chip, output_reg, 0xff,
init_data[i].output_reg);
}
return ret;
}
