1 Scope of Document
This document describes kernel how to support leds-gpio
2 Requiremen
2.1 Function Requirement
2.2 Performance Requirement
NA
3 Method
3.1 Export cross compile
3.2 Support kernel leds-gpio
arch/arm/mach-nuc980/dev.c
#define SMART_FOURCE_LEDS_GPIO
#if defined(SMART_FOURCE_LEDS_GPIO)
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
static struct gpio_led gpio_leds[] = {
{
.name = "heartbeat",
.gpio = 170,
.default_trigger = "heartbeat",
},
{
.name = "4g-power",
.gpio = 139,
.default_state = 0,
},
{
.name = "4g-reset",
.gpio = 140,
.default_state = 0,
},
};
static struct gpio_led_platform_data gpio_led_info = {
.leds = gpio_leds,
.num_leds = ARRAY_SIZE(gpio_leds),
};
static struct platform_device leds_gpio = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = &gpio_led_info,
},
};
#endif
/* USB EHCI Host Controller */
#if defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_EHCI_HCD_MODULE)
static struct resource nuc980_ehci_resource[] = {
#if defined(CONFIG_BACKLIGHT_PWM)
&nuc980_pwm_bl,
#endif
+#if defined(SMART_FOURCE_LEDS_GPIO)
+ &leds_gpio
+#endif
};
make nuc980_eth2uart_defconfig
make uImage
4 Output file
../image/980uImage