100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/property.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
#include "leds.h"
|
|
|
|
|
|
/* leds stuff */
|
|
static int dt_leds_probe(struct platform_device *pdev);
|
|
static void dt_leds_remove(struct platform_device *pdev);
|
|
|
|
static struct of_device_id leds_driver_ids[] = {
|
|
{
|
|
.compatible = "hottis,leds",
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, leds_driver_ids);
|
|
|
|
struct platform_driver leds_driver = {
|
|
.probe = dt_leds_probe,
|
|
.remove = dt_leds_remove,
|
|
.driver = {
|
|
.name = "leds_device_driver",
|
|
.of_match_table = leds_driver_ids,
|
|
},
|
|
};
|
|
|
|
static struct gpio_desc *red_led = NULL;
|
|
static struct gpio_desc *blue_led = NULL;
|
|
|
|
static int dt_leds_probe(struct platform_device *pdev) {
|
|
struct device *dev = &pdev->dev;
|
|
|
|
printk("counter - leds probing\n");
|
|
|
|
if(!device_property_present(dev, "red-led-gpio")) {
|
|
printk("counter - Error! Device property 'red-led-gpio' not found!\n");
|
|
return -1;
|
|
}
|
|
if(!device_property_present(dev, "blue-led-gpio")) {
|
|
printk("counter - Error! Device property 'blue-led-gpio' not found!\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* Init GPIO */
|
|
red_led = gpiod_get(dev, "red-led", GPIOD_OUT_LOW);
|
|
if(IS_ERR(red_led)) {
|
|
printk("counter - Error! Could not setup the GPIO red-led\n");
|
|
return -1 * IS_ERR(red_led);
|
|
}
|
|
blue_led = gpiod_get(dev, "blue-led", GPIOD_OUT_LOW);
|
|
if(IS_ERR(blue_led)) {
|
|
printk("counter - Error! Could not setup the GPIO blue-led\n");
|
|
return -1 * IS_ERR(blue_led);
|
|
}
|
|
|
|
printk("counter - red led on\n");
|
|
gpiod_set_value(red_led, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dt_leds_remove(struct platform_device *pdev) {
|
|
printk("counter - red led off\n");
|
|
gpiod_set_value(red_led, 0);
|
|
|
|
printk("counter - leds removing\n");
|
|
gpiod_put(red_led);
|
|
gpiod_put(blue_led);
|
|
}
|
|
|
|
void led_ctrl(enum led_color_e color, enum led_state_e state) {
|
|
struct gpio_desc *led;
|
|
switch (color) {
|
|
case e_RED:
|
|
led = red_led;
|
|
break;
|
|
case e_BLUE:
|
|
led = blue_led;
|
|
break;
|
|
}
|
|
int st;
|
|
switch (state) {
|
|
case e_ON:
|
|
st = 1;
|
|
break;
|
|
case e_OFF:
|
|
st = 0;
|
|
break;
|
|
}
|
|
gpiod_set_value(led, st);
|
|
}
|
|
|