blob: 638b5fbfe04c3be92d16f4a2eaf8a92f7c59476b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
/* Copyright 2020 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "fpsensor_detect.h"
#include "gpio.h"
#include "timer.h"
enum fp_transport_type get_fp_transport_type(void)
{
enum fp_transport_type ret;
gpio_set_level(GPIO_DIVIDER_HIGHSIDE, 1);
usleep(1);
switch (gpio_get_level(GPIO_TRANSPORT_SEL)) {
case 0:
ret = FP_TRANSPORT_TYPE_UART;
break;
case 1:
ret = FP_TRANSPORT_TYPE_SPI;
break;
default:
ret = FP_TRANSPORT_TYPE_UNKNOWN;
break;
}
gpio_set_level(GPIO_DIVIDER_HIGHSIDE, 0);
return ret;
}
|
