linux-imx

#include <linux/leds.h>

​

#define LED_YELLOW  0x00

#define LED_GREEN   0x01

​

#define LED_EN       (1 << 4) /* LED ON/OFF 0:off, 1:on                       */

#define LED_AUTOSTOP (1 << 5) /* LED ON/OFF auto stop set 0:disable, 1:enable */

#define LED_ALWAYS   (1 << 6) /* LED Interrupt Mask 0:No mask, 1:mask         */

​

                      enum led_brightness value)

{

    struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);

    /*

     * In this message:

     * Byte 0 = LED color: 0 = yellow, 1 = green

     *          yellow LED is always ~30 blinks per minute

     * Byte 1 = duration (flags?) appears to be ignored

     * Byte 2 = green ontime in 1/10 sec (deciseconds)

     *          1 = 1/10 second

    msg.tx_data[0] = LED_GREEN;

    msg.tx_data[1] = 0;

    if (value) {

        msg.tx_data[2] = 0; /* Duty cycle 256 */

        msg.tx_data[3] = 1;

    } else {

        msg.tx_data[2] = 1;

        msg.tx_data[3] = 0; /* Duty cycle 256 */

    }

}

​

/* Maximum duty cycle in ms 256/10 sec = 25600 ms */

#define IPAQ_LED_MAX_DUTY 25600

​

static int micro_leds_blink_set(struct led_classdev *led_cdev,

                unsigned long *delay_on,

                unsigned long *delay_off)

{

    struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);

    if (*delay_off >= IPAQ_LED_MAX_DUTY)

        msg.tx_data[3] = 0;

    else

        msg.tx_data[3] = (u8) DIV_ROUND_CLOSEST(*delay_off, 100);

    return ipaq_micro_tx_msg_sync(micro, &msg);

}

​

static struct led_classdev micro_led = {

    .name           = "led-ipaq-micro",

    .blink_set      = micro_leds_blink_set,

    .flags          = LED_CORE_SUSPENDRESUME,

};

​

static int micro_leds_probe(struct platform_device *pdev)

{

    int ret;

​

    ret = devm_led_classdev_register(&pdev->dev, &micro_led);

    if (ret) {