lineage_kernel_xcoverpro/drivers/gps/sec_gps_bcm4753.c

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2023-06-18 22:53:49 +00:00
#include <linux/init.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/sec_class.h>
static struct device *gps_dev;
static unsigned int gps_pwr_on;
int check_gps_op(void)
{
/* This pin is high when gps is working */
int gps_is_running = gpio_get_value(gps_pwr_on);
pr_debug("LPA : %s(%d)\n", __func__, gps_is_running);
return gps_is_running;
}
EXPORT_SYMBOL(check_gps_op);
static int __init gps_bcm4753_init(void)
{
int ret = 0;
const char *gps_node = "samsung,exynos54xx-bcm4753";
struct device_node *root_node = NULL;
gps_dev = sec_device_create(NULL, "gps");
BUG_ON(!gps_dev);
root_node = of_find_compatible_node(NULL, NULL, gps_node);
if (!root_node) {
WARN(1, "failed to get device node of bcm4753\n");
ret = -ENODEV;
goto err_sec_device_create;
}
gps_pwr_on = of_get_gpio(root_node, 0);
if (!gpio_is_valid(gps_pwr_on)) {
WARN(1, "Invalied gpio pin : %d\n", gps_pwr_on);
ret = -ENODEV;
goto err_sec_device_create;
}
if (gpio_request(gps_pwr_on, "GPS_PWR_EN")) {
WARN(1, "fail to request gpio(GPS_PWR_EN)\n");
ret = -ENODEV;
goto err_sec_device_create;
}
gpio_direction_output(gps_pwr_on, 0);
gpio_export(gps_pwr_on, 1);
gpio_export_link(gps_dev, "GPS_PWR_EN", gps_pwr_on);
return 0;
err_sec_device_create:
sec_device_destroy(gps_dev->devt);
return ret;
}
device_initcall(gps_bcm4753_init);