static int
write_machine_id(const char *path, char id[SOL_STATIC_ARRAY_SIZE(33)])
{
SOL_NULL_CHECK(path, -EINVAL);
/* add trailing '\n' */
return sol_util_write_file(path, "%s\n", id);
}
static int
_mux_init(void)
{
//Try to detect the Arduino Breakout
if (sol_util_write_file("/sys/class/gpio/export", "214") >= 0) {
ardu_breakout = true;
apply_mux_desc(init_board, MODE_GPIO);
}
return 0;
}
static int
_set_gpio(int pin, enum sol_gpio_direction dir, int drive, bool val)
{
int ret = 0;
int len;
struct stat st;
char path[PATH_MAX];
struct sol_gpio *gpio;
const char *drive_str;
struct sol_gpio_config gpio_config = { 0 };
gpio_config.dir = dir;
gpio_config.out.value = val;
gpio = sol_gpio_open_raw(pin, &gpio_config);
if (!gpio)
return -EINVAL;
// Drive:
// This is not standard interface in upstream Linux, so the
// Linux implementation of sol-gpio doesn't handle it, thus the need
// to set it here manually
//
// Not all platforms will have this (this will move in the future)
// so its no problem to fail the if bellow
len = snprintf(path, sizeof(path), BASE "/gpio%d/drive", pin);
if (len < 0 || len > PATH_MAX || stat(path, &st) == -1)
goto err;
switch (drive) {
case GPIO_DRIVE_PULLUP:
drive_str = "pullup";
break;
case GPIO_DRIVE_PULLDOWN:
drive_str = "pulldown";
break;
case GPIO_DRIVE_HIZ:
drive_str = "hiz";
break;
default:
drive_str = "strong";
}
ret = sol_util_write_file(path, "%s", drive_str);
err:
sol_gpio_close(gpio);
return ret;
}