int ths8200_test(struct i2c_client *client, u8 reg, u8 value)
{
int err;
err |= ths8200_write(client, reg, value);
if (err < 0) {
dev_err(&client->dev, "%s: Write Error...\n", __func__);
return -EINVAL;
}
}
int ths8200_disable(struct i2c_client *client)
{
int err = 0;
//attempt graceful powerdown: set chip_pwdn bit (enter PD mode)
err |= ths8200_write(client, 0x03, 0x04);
if (err < 0) {
dev_err(&client->dev, "%s: Unable to place THS8200 into power down state...\n", __func__);
return -EINVAL;
}
mdelay(1);
return 0;
}
int ths8200_enable(struct i2c_client *client)
{
//ths8200_enable should only be used following ths8200_disable if THS has been initialized
int err = 0;
//clear chip_pwdn bit (exit PD mode)
err |= ths8200_write(client, 0x03, 0x01);
if (err < 0) {
dev_err(&client->dev, "%s: Unable to communicate with THS8200...\n", __func__);
return -EINVAL;
}
mdelay(1);
return 0;
}
int ths8200_init(struct i2c_client *client)
{
u8 c;
int i;
int err = 0;
//issue THS reset: set reset low, (duration > 200ns)
//disable pwm
twl4030_i2c_read_u8(TWL4030_MODULE_INTBR, &c, 0x0d);
c &= ~(0x30);
twl4030_i2c_write_u8 (TWL4030_MODULE_INTBR, c, 0x0d);
//set GPIO7 as output - pg 506
twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, &c, 0x03);
c |= (0x80);
twl4030_i2c_write_u8 (TWL4030_MODULE_GPIO, c, 0x03);
//ensure reest line is high
twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, &c, 0x06);
c |= (0x80);
twl4030_i2c_write_u8 (TWL4030_MODULE_GPIO, c, 0x06);
mdelay(1);
//pull reset line low (min duration 200ns)
c &= ~(0x80);
twl4030_i2c_write_u8 (TWL4030_MODULE_GPIO, c, 0x06);
mdelay(1);
//set reset line high again
c |= (0x80);
twl4030_i2c_write_u8 (TWL4030_MODULE_GPIO, c, 0x06);
mdelay(1);
//execute init sequence
for (i = 0; i < (sizeof(ths8200_init_seq)/2); i++)
{
err |= ths8200_write(client,
ths8200_init_seq[i][0],
ths8200_init_seq[i][1]);
}
if (err < 0) {
dev_err(&client->dev, "%s: Error during THS8200 init\n", __func__);
return -EINVAL;
}
return 0;
}
int ths8200_init(struct i2c_client *client)
{
int i;
int err = 0;
//execute init sequence
for (i = 0; i < (sizeof(ths8200_init_seq)/2); i++)
{
err |= ths8200_write(client,
ths8200_init_seq[i][0],
ths8200_init_seq[i][1]);
}
if (err < 0) {
dev_err(&client->dev, "%s: Error during THS8200 init\n", __func__);
return -EINVAL;
}
return 0;
}
